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arm64 updates for 3.19

Browse Source 
Changes include:
  - Support for alternative instruction patching from Andre
  - seccomp from Akashi
  - Some AArch32 instruction emulation, required by the Android folks
  - Optimisations for exception entry/exit code, cmpxchg, pcpu atomics
  - mmu_gather range calculations moved into core code
  - EFI updates from Ard, including long-awaited SMBIOS support
  - /proc/cpuinfo fixes to align with the format used by arch/arm/
  - A few non-critical fixes across the architecture
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:
 "Here's the usual mixed bag of arm64 updates, also including some
  related EFI changes (Acked by Matt) and the MMU gather range cleanup
  (Acked by you).

  Changes include:
   - support for alternative instruction patching from Andre
   - seccomp from Akashi
   - some AArch32 instruction emulation, required by the Android folks
   - optimisations for exception entry/exit code, cmpxchg, pcpu atomics
   - mmu_gather range calculations moved into core code
   - EFI updates from Ard, including long-awaited SMBIOS support
   - /proc/cpuinfo fixes to align with the format used by arch/arm/
   - a few non-critical fixes across the architecture"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (70 commits)
  arm64: remove the unnecessary arm64_swiotlb_init()
  arm64: add module support for alternatives fixups
  arm64: perf: Prevent wraparound during overflow
  arm64/include/asm: Fixed a warning about 'struct pt_regs'
  arm64: Provide a namespace to NCAPS
  arm64: bpf: lift restriction on last instruction
  arm64: Implement support for read-mostly sections
  arm64: compat: align cacheflush syscall with arch/arm
  arm64: add seccomp support
  arm64: add SIGSYS siginfo for compat task
  arm64: add seccomp syscall for compat task
  asm-generic: add generic seccomp.h for secure computing mode 1
  arm64: ptrace: allow tracer to skip a system call
  arm64: ptrace: add NT_ARM_SYSTEM_CALL regset
  arm64: Move some head.text functions to executable section
  arm64: jump labels: NOP out NOP -> NOP replacement
  arm64: add support to dump the kernel page tables
  arm64: Add FIX_HOLE to permanent fixed addresses
  arm64: alternatives: fix pr_fmt string for consistency
  arm64: vmlinux.lds.S: don't discard .exit.* sections at link-time
  ...
This commit is contained in:
Linus Torvalds 2014-12-09 13:12:47 -08:00
commit b64bb1d758
84 changed files with 3151 additions and 718 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
Documentation/arm64/legacy_instructions.txt Normal file
View File

@ -0,0 +1,45 @@
The arm64 port of the Linux kernel provides infrastructure to support
emulation of instructions which have been deprecated, or obsoleted in
the architecture. The infrastructure code uses undefined instruction
hooks to support emulation. Where available it also allows turning on
the instruction execution in hardware.
The emulation mode can be controlled by writing to sysctl nodes
(/proc/sys/abi). The following explains the different execution
behaviours and the corresponding values of the sysctl nodes -
* Undef
Value: 0
Generates undefined instruction abort. Default for instructions that
have been obsoleted in the architecture, e.g., SWP
* Emulate
Value: 1
Uses software emulation. To aid migration of software, in this mode
usage of emulated instruction is traced as well as rate limited
warnings are issued. This is the default for deprecated
instructions, .e.g., CP15 barriers
* Hardware Execution
Value: 2
Although marked as deprecated, some implementations may support the
enabling/disabling of hardware support for the execution of these
instructions. Using hardware execution generally provides better
performance, but at the loss of ability to gather runtime statistics
about the use of the deprecated instructions.
The default mode depends on the status of the instruction in the
architecture. Deprecated instructions should default to emulation
while obsolete instructions must be undefined by default.
Supported legacy instructions
-----------------------------
* SWP{B}
Node: /proc/sys/abi/swp
Status: Obsolete
Default: Undef (0)
* CP15 Barriers
Node: /proc/sys/abi/cp15_barrier
Status: Deprecated
Default: Emulate (1)

187
arch/arm64/Kconfig
View File

@ -34,13 +34,16 @@ config ARM64
select GENERIC_TIME_VSYSCALL
select HANDLE_DOMAIN_IRQ
select HARDIRQS_SW_RESEND
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KGDB
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_BPF_JIT
select HAVE_C_RECORDMCOUNT
select HAVE_CC_STACKPROTECTOR
select HAVE_CMPXCHG_DOUBLE
select HAVE_DEBUG_BUGVERBOSE
select HAVE_DEBUG_KMEMLEAK
select HAVE_DMA_API_DEBUG
@ -193,6 +196,114 @@ endmenu
menu "Kernel Features"
menu "ARM errata workarounds via the alternatives framework"
config ARM64_ERRATUM_826319
bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted"
default y
help
This option adds an alternative code sequence to work around ARM
erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or
AXI master interface and an L2 cache.
If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors
and is unable to accept a certain write via this interface, it will
not progress on read data presented on the read data channel and the
system can deadlock.
The workaround promotes data cache clean instructions to
data cache clean-and-invalidate.
Please note that this does not necessarily enable the workaround,
as it depends on the alternative framework, which will only patch
the kernel if an affected CPU is detected.
If unsure, say Y.
config ARM64_ERRATUM_827319
bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect"
default y
help
This option adds an alternative code sequence to work around ARM
erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI
master interface and an L2 cache.
Under certain conditions this erratum can cause a clean line eviction
to occur at the same time as another transaction to the same address
on the AMBA 5 CHI interface, which can cause data corruption if the
interconnect reorders the two transactions.
The workaround promotes data cache clean instructions to
data cache clean-and-invalidate.
Please note that this does not necessarily enable the workaround,
as it depends on the alternative framework, which will only patch
the kernel if an affected CPU is detected.
If unsure, say Y.
config ARM64_ERRATUM_824069
bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop"
default y
help
This option adds an alternative code sequence to work around ARM
erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected
to a coherent interconnect.
If a Cortex-A53 processor is executing a store or prefetch for
write instruction at the same time as a processor in another
cluster is executing a cache maintenance operation to the same
address, then this erratum might cause a clean cache line to be
incorrectly marked as dirty.
The workaround promotes data cache clean instructions to
data cache clean-and-invalidate.
Please note that this option does not necessarily enable the
workaround, as it depends on the alternative framework, which will
only patch the kernel if an affected CPU is detected.
If unsure, say Y.
config ARM64_ERRATUM_819472
bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption"
default y
help
This option adds an alternative code sequence to work around ARM
erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache
present when it is connected to a coherent interconnect.
If the processor is executing a load and store exclusive sequence at
the same time as a processor in another cluster is executing a cache
maintenance operation to the same address, then this erratum might
cause data corruption.
The workaround promotes data cache clean instructions to
data cache clean-and-invalidate.
Please note that this does not necessarily enable the workaround,
as it depends on the alternative framework, which will only patch
the kernel if an affected CPU is detected.
If unsure, say Y.
config ARM64_ERRATUM_832075
bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads"
default y
help
This option adds an alternative code sequence to work around ARM
erratum 832075 on Cortex-A57 parts up to r1p2.
Affected Cortex-A57 parts might deadlock when exclusive load/store
instructions to Write-Back memory are mixed with Device loads.
The workaround is to promote device loads to use Load-Acquire
semantics.
Please note that this does not necessarily enable the workaround,
as it depends on the alternative framework, which will only patch
the kernel if an affected CPU is detected.
If unsure, say Y.
endmenu
choice
prompt "Page size"
default ARM64_4K_PAGES
@ -345,6 +456,19 @@ config ARCH_HAS_CACHE_LINE_SIZE
source "mm/Kconfig"
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
---help---
This kernel feature is useful for number crunching applications
that may need to compute untrusted bytecode during their
execution. By using pipes or other transports made available to
the process as file descriptors supporting the read/write
syscalls, it's possible to isolate those applications in
their own address space using seccomp. Once seccomp is
enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
and the task is only allowed to execute a few safe syscalls
defined by each seccomp mode.
config XEN_DOM0
def_bool y
depends on XEN
@ -361,6 +485,58 @@ config FORCE_MAX_ZONEORDER
default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
default "11"
menuconfig ARMV8_DEPRECATED
bool "Emulate deprecated/obsolete ARMv8 instructions"
depends on COMPAT
help
Legacy software support may require certain instructions
that have been deprecated or obsoleted in the architecture.
Enable this config to enable selective emulation of these
features.
If unsure, say Y
if ARMV8_DEPRECATED
config SWP_EMULATION
bool "Emulate SWP/SWPB instructions"
help
ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that
they are always undefined. Say Y here to enable software
emulation of these instructions for userspace using LDXR/STXR.
In some older versions of glibc [<=2.8] SWP is used during futex
trylock() operations with the assumption that the code will not
be preempted. This invalid assumption may be more likely to fail
with SWP emulation enabled, leading to deadlock of the user
application.
NOTE: when accessing uncached shared regions, LDXR/STXR rely
on an external transaction monitoring block called a global
monitor to maintain update atomicity. If your system does not
implement a global monitor, this option can cause programs that
perform SWP operations to uncached memory to deadlock.
If unsure, say Y
config CP15_BARRIER_EMULATION
bool "Emulate CP15 Barrier instructions"
help
The CP15 barrier instructions - CP15ISB, CP15DSB, and
CP15DMB - are deprecated in ARMv8 (and ARMv7). It is
strongly recommended to use the ISB, DSB, and DMB
instructions instead.
Say Y here to enable software emulation of these
instructions for AArch32 userspace code. When this option is
enabled, CP15 barrier usage is traced which can help
identify software that needs updating.
If unsure, say Y
endif
endmenu
menu "Boot options"
@ -401,6 +577,17 @@ config EFI
allow the kernel to be booted as an EFI application. This
is only useful on systems that have UEFI firmware.
config DMI
bool "Enable support for SMBIOS (DMI) tables"
depends on EFI
default y
help
This enables SMBIOS/DMI feature for systems.
This option is only useful on systems that have UEFI firmware.
However, even with this option, the resultant kernel should
continue to boot on existing non-UEFI platforms.
endmenu
menu "Userspace binary formats"

12
arch/arm64/Kconfig.debug
View File

@ -6,6 +6,18 @@ config FRAME_POINTER
bool
default y
config ARM64_PTDUMP
bool "Export kernel pagetable layout to userspace via debugfs"
depends on DEBUG_KERNEL
select DEBUG_FS
help
Say Y here if you want to show the kernel pagetable layout in a
debugfs file. This information is only useful for kernel developers
who are working in architecture specific areas of the kernel.
It is probably not a good idea to enable this feature in a production
kernel.
If in doubt, say "N"
config STRICT_DEVMEM
bool "Filter access to /dev/mem"
depends on MMU

5
arch/arm64/crypto/Kconfig
View File

@ -27,20 +27,19 @@ config CRYPTO_AES_ARM64_CE
tristate "AES core cipher using ARMv8 Crypto Extensions"
depends on ARM64 && KERNEL_MODE_NEON
select CRYPTO_ALGAPI
select CRYPTO_AES
config CRYPTO_AES_ARM64_CE_CCM
tristate "AES in CCM mode using ARMv8 Crypto Extensions"
depends on ARM64 && KERNEL_MODE_NEON
select CRYPTO_ALGAPI
select CRYPTO_AES
select CRYPTO_AES_ARM64_CE
select CRYPTO_AEAD
config CRYPTO_AES_ARM64_CE_BLK
tristate "AES in ECB/CBC/CTR/XTS modes using ARMv8 Crypto Extensions"
depends on ARM64 && KERNEL_MODE_NEON
select CRYPTO_BLKCIPHER
select CRYPTO_AES
select CRYPTO_AES_ARM64_CE
select CRYPTO_ABLK_HELPER
config CRYPTO_AES_ARM64_NEON_BLK

4
arch/arm64/crypto/aes-ce-ccm-glue.c
View File

@ -16,6 +16,8 @@
#include <linux/crypto.h>
#include <linux/module.h>
#include "aes-ce-setkey.h"
static int num_rounds(struct crypto_aes_ctx *ctx)
{
/*
@ -48,7 +50,7 @@ static int ccm_setkey(struct crypto_aead *tfm, const u8 *in_key,
struct crypto_aes_ctx *ctx = crypto_aead_ctx(tfm);
int ret;
ret = crypto_aes_expand_key(ctx, in_key, key_len);
ret = ce_aes_expandkey(ctx, in_key, key_len);
if (!ret)
return 0;

112
arch/arm64/crypto/aes-ce-cipher.c
View File

@ -14,6 +14,8 @@
#include <linux/crypto.h>
#include <linux/module.h>
#include "aes-ce-setkey.h"
MODULE_DESCRIPTION("Synchronous AES cipher using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
@ -124,6 +126,114 @@ static void aes_cipher_decrypt(struct crypto_tfm *tfm, u8 dst[], u8 const src[])
kernel_neon_end();
}
/*
* aes_sub() - use the aese instruction to perform the AES sbox substitution
* on each byte in 'input'
*/
static u32 aes_sub(u32 input)
{
u32 ret;
__asm__("dup v1.4s, %w[in] ;"
"movi v0.16b, #0 ;"
"aese v0.16b, v1.16b ;"
"umov %w[out], v0.4s[0] ;"
: [out] "=r"(ret)
: [in] "r"(input)
: "v0","v1");
return ret;
}
int ce_aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
unsigned int key_len)
{
/*
* The AES key schedule round constants
*/
static u8 const rcon[] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
};
u32 kwords = key_len / sizeof(u32);
struct aes_block *key_enc, *key_dec;
int i, j;
if (key_len != AES_KEYSIZE_128 &&
key_len != AES_KEYSIZE_192 &&
key_len != AES_KEYSIZE_256)
return -EINVAL;
memcpy(ctx->key_enc, in_key, key_len);
ctx->key_length = key_len;
kernel_neon_begin_partial(2);
for (i = 0; i < sizeof(rcon); i++) {
u32 *rki = ctx->key_enc + (i * kwords);
u32 *rko = rki + kwords;
rko[0] = ror32(aes_sub(rki[kwords - 1]), 8) ^ rcon[i] ^ rki[0];
rko[1] = rko[0] ^ rki[1];
rko[2] = rko[1] ^ rki[2];
rko[3] = rko[2] ^ rki[3];
if (key_len == AES_KEYSIZE_192) {
if (i >= 7)
break;
rko[4] = rko[3] ^ rki[4];
rko[5] = rko[4] ^ rki[5];
} else if (key_len == AES_KEYSIZE_256) {
if (i >= 6)
break;
rko[4] = aes_sub(rko[3]) ^ rki[4];
rko[5] = rko[4] ^ rki[5];
rko[6] = rko[5] ^ rki[6];
rko[7] = rko[6] ^ rki[7];
}
}
/*
* Generate the decryption keys for the Equivalent Inverse Cipher.
* This involves reversing the order of the round keys, and applying
* the Inverse Mix Columns transformation on all but the first and
* the last one.
*/
key_enc = (struct aes_block *)ctx->key_enc;
key_dec = (struct aes_block *)ctx->key_dec;
j = num_rounds(ctx);
key_dec[0] = key_enc[j];
for (i = 1, j--; j > 0; i++, j--)
__asm__("ld1 {v0.16b}, %[in] ;"
"aesimc v1.16b, v0.16b ;"
"st1 {v1.16b}, %[out] ;"
: [out] "=Q"(key_dec[i])
: [in] "Q"(key_enc[j])
: "v0","v1");
key_dec[i] = key_enc[0];
kernel_neon_end();
return 0;
}
EXPORT_SYMBOL(ce_aes_expandkey);
int ce_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
int ret;
ret = ce_aes_expandkey(ctx, in_key, key_len);
if (!ret)
return 0;
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
}
EXPORT_SYMBOL(ce_aes_setkey);
static struct crypto_alg aes_alg = {
.cra_name = "aes",
.cra_driver_name = "aes-ce",
@ -135,7 +245,7 @@ static struct crypto_alg aes_alg = {
.cra_cipher = {
.cia_min_keysize = AES_MIN_KEY_SIZE,
.cia_max_keysize = AES_MAX_KEY_SIZE,
.cia_setkey = crypto_aes_set_key,
.cia_setkey = ce_aes_setkey,
.cia_encrypt = aes_cipher_encrypt,
.cia_decrypt = aes_cipher_decrypt
}

5
arch/arm64/crypto/aes-ce-setkey.h Normal file
View File

@ -0,0 +1,5 @@
int ce_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len);
int ce_aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
unsigned int key_len);

18
arch/arm64/crypto/aes-glue.c
View File

@ -16,9 +16,13 @@
#include <linux/module.h>
#include <linux/cpufeature.h>
#include "aes-ce-setkey.h"
#ifdef USE_V8_CRYPTO_EXTENSIONS
#define MODE "ce"
#define PRIO 300
#define aes_setkey ce_aes_setkey
#define aes_expandkey ce_aes_expandkey
#define aes_ecb_encrypt ce_aes_ecb_encrypt
#define aes_ecb_decrypt ce_aes_ecb_decrypt
#define aes_cbc_encrypt ce_aes_cbc_encrypt
@ -30,6 +34,8 @@ MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 Crypto Extensions");
#else
#define MODE "neon"
#define PRIO 200
#define aes_setkey crypto_aes_set_key
#define aes_expandkey crypto_aes_expand_key
#define aes_ecb_encrypt neon_aes_ecb_encrypt
#define aes_ecb_decrypt neon_aes_ecb_decrypt
#define aes_cbc_encrypt neon_aes_cbc_encrypt
@ -79,10 +85,10 @@ static int xts_set_key(struct crypto_tfm *tfm, const u8 *in_key,
struct crypto_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
int ret;
ret = crypto_aes_expand_key(&ctx->key1, in_key, key_len / 2);
ret = aes_expandkey(&ctx->key1, in_key, key_len / 2);
if (!ret)
ret = crypto_aes_expand_key(&ctx->key2, &in_key[key_len / 2],
key_len / 2);
ret = aes_expandkey(&ctx->key2, &in_key[key_len / 2],
key_len / 2);
if (!ret)
return 0;
@ -288,7 +294,7 @@ static struct crypto_alg aes_algs[] = { {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = crypto_aes_set_key,
.setkey = aes_setkey,
.encrypt = ecb_encrypt,
.decrypt = ecb_decrypt,
},
@ -306,7 +312,7 @@ static struct crypto_alg aes_algs[] = { {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = crypto_aes_set_key,
.setkey = aes_setkey,
.encrypt = cbc_encrypt,
.decrypt = cbc_decrypt,
},
@ -324,7 +330,7 @@ static struct crypto_alg aes_algs[] = { {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = crypto_aes_set_key,
.setkey = aes_setkey,
.encrypt = ctr_encrypt,
.decrypt = ctr_encrypt,
},

29
arch/arm64/include/asm/alternative-asm.h Normal file
View File

@ -0,0 +1,29 @@
#ifndef __ASM_ALTERNATIVE_ASM_H
#define __ASM_ALTERNATIVE_ASM_H
#ifdef __ASSEMBLY__
.macro altinstruction_entry orig_offset alt_offset feature orig_len alt_len
.word \orig_offset - .
.word \alt_offset - .
.hword \feature
.byte \orig_len
.byte \alt_len
.endm
.macro alternative_insn insn1 insn2 cap
661: \insn1
662: .pushsection .altinstructions, "a"
altinstruction_entry 661b, 663f, \cap, 662b-661b, 664f-663f
.popsection
.pushsection .altinstr_replacement, "ax"
663: \insn2
664: .popsection
.if ((664b-663b) != (662b-661b))
.error "Alternatives instruction length mismatch"
.endif
.endm
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ALTERNATIVE_ASM_H */

44
arch/arm64/include/asm/alternative.h Normal file
View File

@ -0,0 +1,44 @@
#ifndef __ASM_ALTERNATIVE_H
#define __ASM_ALTERNATIVE_H
#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/stringify.h>
struct alt_instr {
s32 orig_offset; /* offset to original instruction */
s32 alt_offset; /* offset to replacement instruction */
u16 cpufeature; /* cpufeature bit set for replacement */
u8 orig_len; /* size of original instruction(s) */
u8 alt_len; /* size of new instruction(s), <= orig_len */
};
void apply_alternatives_all(void);
void apply_alternatives(void *start, size_t length);
void free_alternatives_memory(void);
#define ALTINSTR_ENTRY(feature) \
" .word 661b - .\n" /* label */ \
" .word 663f - .\n" /* new instruction */ \
" .hword " __stringify(feature) "\n" /* feature bit */ \
" .byte 662b-661b\n" /* source len */ \
" .byte 664f-663f\n" /* replacement len */
/* alternative assembly primitive: */
#define ALTERNATIVE(oldinstr, newinstr, feature) \
"661:\n\t" \
oldinstr "\n" \
"662:\n" \
".pushsection .altinstructions,\"a\"\n" \
ALTINSTR_ENTRY(feature) \
".popsection\n" \
".pushsection .altinstr_replacement, \"a\"\n" \
"663:\n\t" \
newinstr "\n" \
"664:\n\t" \
".popsection\n\t" \
".if ((664b-663b) != (662b-661b))\n\t" \
" .error \"Alternatives instruction length mismatch\"\n\t"\
".endif\n"
#endif /* __ASM_ALTERNATIVE_H */

2
arch/arm64/include/asm/cache.h
View File

@ -32,6 +32,8 @@
#ifndef __ASSEMBLY__
#define __read_mostly __attribute__((__section__(".data..read_mostly")))
static inline int cache_line_size(void)
{
u32 cwg = cache_type_cwg();

2
arch/arm64/include/asm/cacheflush.h
View File

@ -73,7 +73,7 @@ extern void flush_cache_all(void);
extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
extern void flush_icache_range(unsigned long start, unsigned long end);
extern void __flush_dcache_area(void *addr, size_t len);
extern void __flush_cache_user_range(unsigned long start, unsigned long end);
extern long __flush_cache_user_range(unsigned long start, unsigned long end);
static inline void flush_cache_mm(struct mm_struct *mm)
{

73
arch/arm64/include/asm/cmpxchg.h
View File

@ -19,6 +19,7 @@
#define __ASM_CMPXCHG_H
#include <linux/bug.h>
#include <linux/mmdebug.h>
#include <asm/barrier.h>
@ -152,6 +153,51 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
return oldval;
}
#define system_has_cmpxchg_double() 1
static inline int __cmpxchg_double(volatile void *ptr1, volatile void *ptr2,
unsigned long old1, unsigned long old2,
unsigned long new1, unsigned long new2, int size)
{
unsigned long loop, lost;
switch (size) {
case 8:
VM_BUG_ON((unsigned long *)ptr2 - (unsigned long *)ptr1 != 1);
do {
asm volatile("// __cmpxchg_double8\n"
" ldxp %0, %1, %2\n"
" eor %0, %0, %3\n"
" eor %1, %1, %4\n"
" orr %1, %0, %1\n"
" mov %w0, #0\n"
" cbnz %1, 1f\n"
" stxp %w0, %5, %6, %2\n"
"1:\n"
: "=&r"(loop), "=&r"(lost), "+Q" (*(u64 *)ptr1)
: "r" (old1), "r"(old2), "r"(new1), "r"(new2));
} while (loop);
break;
default:
BUILD_BUG();
}
return !lost;
}
static inline int __cmpxchg_double_mb(volatile void *ptr1, volatile void *ptr2,
unsigned long old1, unsigned long old2,
unsigned long new1, unsigned long new2, int size)
{
int ret;
smp_mb();
ret = __cmpxchg_double(ptr1, ptr2, old1, old2, new1, new2, size);
smp_mb();
return ret;
}
static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
unsigned long new, int size)
{
@ -182,6 +228,33 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
__ret; \
})
#define cmpxchg_double(ptr1, ptr2, o1, o2, n1, n2) \
({\
int __ret;\
__ret = __cmpxchg_double_mb((ptr1), (ptr2), (unsigned long)(o1), \
(unsigned long)(o2), (unsigned long)(n1), \
(unsigned long)(n2), sizeof(*(ptr1)));\
__ret; \
})
#define cmpxchg_double_local(ptr1, ptr2, o1, o2, n1, n2) \
({\
int __ret;\
__ret = __cmpxchg_double((ptr1), (ptr2), (unsigned long)(o1), \
(unsigned long)(o2), (unsigned long)(n1), \
(unsigned long)(n2), sizeof(*(ptr1)));\
__ret; \
})
#define this_cpu_cmpxchg_1(ptr, o, n) cmpxchg_local(raw_cpu_ptr(&(ptr)), o, n)
#define this_cpu_cmpxchg_2(ptr, o, n) cmpxchg_local(raw_cpu_ptr(&(ptr)), o, n)
#define this_cpu_cmpxchg_4(ptr, o, n) cmpxchg_local(raw_cpu_ptr(&(ptr)), o, n)
#define this_cpu_cmpxchg_8(ptr, o, n) cmpxchg_local(raw_cpu_ptr(&(ptr)), o, n)
#define this_cpu_cmpxchg_double_8(ptr1, ptr2, o1, o2, n1, n2) \
cmpxchg_double_local(raw_cpu_ptr(&(ptr1)), raw_cpu_ptr(&(ptr2)), \
o1, o2, n1, n2)
#define cmpxchg64(ptr,o,n) cmpxchg((ptr),(o),(n))
#define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr),(o),(n))

7
arch/arm64/include/asm/compat.h
View File

@ -205,6 +205,13 @@ typedef struct compat_siginfo {
compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
/* SIGSYS */
struct {
compat_uptr_t _call_addr; /* calling user insn */
int _syscall; /* triggering system call number */
compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */
} _sigsys;
} _sifields;
} compat_siginfo_t;

2
arch/arm64/include/asm/cpu.h
View File

@ -30,6 +30,8 @@ struct cpuinfo_arm64 {
u32 reg_dczid;
u32 reg_midr;
u64 reg_id_aa64dfr0;
u64 reg_id_aa64dfr1;
u64 reg_id_aa64isar0;
u64 reg_id_aa64isar1;
u64 reg_id_aa64mmfr0;

29
arch/arm64/include/asm/cpufeature.h
View File

@ -21,9 +21,38 @@
#define MAX_CPU_FEATURES (8 * sizeof(elf_hwcap))
#define cpu_feature(x) ilog2(HWCAP_ ## x)
#define ARM64_WORKAROUND_CLEAN_CACHE 0
#define ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE 1
#define ARM64_NCAPS 2
#ifndef __ASSEMBLY__
extern DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
static inline bool cpu_have_feature(unsigned int num)
{
return elf_hwcap & (1UL << num);
}
static inline bool cpus_have_cap(unsigned int num)
{
if (num >= ARM64_NCAPS)
return false;
return test_bit(num, cpu_hwcaps);
}
static inline void cpus_set_cap(unsigned int num)
{
if (num >= ARM64_NCAPS)
pr_warn("Attempt to set an illegal CPU capability (%d >= %d)\n",
num, ARM64_NCAPS);
else
__set_bit(num, cpu_hwcaps);
}
void check_local_cpu_errata(void);
#endif /* __ASSEMBLY__ */
#endif

5
arch/arm64/include/asm/cputype.h
View File

@ -57,6 +57,11 @@
#define MIDR_IMPLEMENTOR(midr) \
(((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT)
#define MIDR_CPU_PART(imp, partnum) \
(((imp) << MIDR_IMPLEMENTOR_SHIFT) | \
(0xf << MIDR_ARCHITECTURE_SHIFT) | \
((partnum) << MIDR_PARTNUM_SHIFT))
#define ARM_CPU_IMP_ARM 0x41
#define ARM_CPU_IMP_APM 0x50

31
arch/arm64/include/asm/dmi.h Normal file
View File

@ -0,0 +1,31 @@
/*
* arch/arm64/include/asm/dmi.h
*
* Copyright (C) 2013 Linaro Limited.
* Written by: Yi Li (yi.li@linaro.org)
*
* based on arch/ia64/include/asm/dmi.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef __ASM_DMI_H
#define __ASM_DMI_H
#include <linux/io.h>
#include <linux/slab.h>
/*
* According to section 2.3.6 of the UEFI spec, the firmware should not
* request a virtual mapping for configuration tables such as SMBIOS.
* This means we have to map them before use.
*/
#define dmi_early_remap(x, l) ioremap_cache(x, l)
#define dmi_early_unmap(x, l) iounmap(x)
#define dmi_remap(x, l) ioremap_cache(x, l)
#define dmi_unmap(x) iounmap(x)
#define dmi_alloc(l) kzalloc(l, GFP_KERNEL)
#endif

8
arch/arm64/include/asm/fixmap.h
View File

@ -31,6 +31,7 @@
*
*/
enum fixed_addresses {
FIX_HOLE,
FIX_EARLYCON_MEM_BASE,
__end_of_permanent_fixed_addresses,
@ -56,10 +57,11 @@ enum fixed_addresses {
#define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE)
extern void __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags);
void __init early_fixmap_init(void);
#define __set_fixmap __early_set_fixmap
#define __early_set_fixmap __set_fixmap
extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
#include <asm-generic/fixmap.h>

1
arch/arm64/include/asm/hwcap.h
View File

@ -30,6 +30,7 @@
#define COMPAT_HWCAP_IDIVA (1 << 17)
#define COMPAT_HWCAP_IDIVT (1 << 18)
#define COMPAT_HWCAP_IDIV (COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
#define COMPAT_HWCAP_LPAE (1 << 20)
#define COMPAT_HWCAP_EVTSTRM (1 << 21)
#define COMPAT_HWCAP2_AES (1 << 0)

10
arch/arm64/include/asm/insn.h
View File

@ -354,6 +354,16 @@ bool aarch64_insn_hotpatch_safe(u32 old_insn, u32 new_insn);
int aarch64_insn_patch_text_nosync(void *addr, u32 insn);
int aarch64_insn_patch_text_sync(void *addrs[], u32 insns[], int cnt);
int aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt);
bool aarch32_insn_is_wide(u32 insn);
#define A32_RN_OFFSET 16
#define A32_RT_OFFSET 12
#define A32_RT2_OFFSET 0
u32 aarch32_insn_extract_reg_num(u32 insn, int offset);
u32 aarch32_insn_mcr_extract_opc2(u32 insn);
u32 aarch32_insn_mcr_extract_crm(u32 insn);
#endif /* __ASSEMBLY__ */
#endif /* __ASM_INSN_H */

23
arch/arm64/include/asm/io.h
View File

@ -28,6 +28,8 @@
#include <asm/barrier.h>
#include <asm/pgtable.h>
#include <asm/early_ioremap.h>
#include <asm/alternative.h>
#include <asm/cpufeature.h>
#include <xen/xen.h>
@ -57,28 +59,41 @@ static inline void __raw_writeq(u64 val, volatile void __iomem *addr)
static inline u8 __raw_readb(const volatile void __iomem *addr)
{
u8 val;
asm volatile("ldrb %w0, [%1]" : "=r" (val) : "r" (addr));
asm volatile(ALTERNATIVE("ldrb %w0, [%1]",
"ldarb %w0, [%1]",
ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE)
: "=r" (val) : "r" (addr));
return val;
}
static inline u16 __raw_readw(const volatile void __iomem *addr)
{
u16 val;
asm volatile("ldrh %w0, [%1]" : "=r" (val) : "r" (addr));
asm volatile(ALTERNATIVE("ldrh %w0, [%1]",
"ldarh %w0, [%1]",
ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE)
: "=r" (val) : "r" (addr));
return val;
}
static inline u32 __raw_readl(const volatile void __iomem *addr)
{
u32 val;
asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr));
asm volatile(ALTERNATIVE("ldr %w0, [%1]",
"ldar %w0, [%1]",
ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE)
: "=r" (val) : "r" (addr));
return val;
}
static inline u64 __raw_readq(const volatile void __iomem *addr)
{
u64 val;
asm volatile("ldr %0, [%1]" : "=r" (val) : "r" (addr));
asm volatile(ALTERNATIVE("ldr %0, [%1]",
"ldar %0, [%1]",
ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE)
: "=r" (val) : "r" (addr));
return val;
}

3
arch/arm64/include/asm/irq.h
View File

@ -3,7 +3,8 @@
#include <asm-generic/irq.h>
extern void (*handle_arch_irq)(struct pt_regs *);
struct pt_regs;
extern void migrate_irqs(void);
extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));

21
arch/arm64/include/asm/kvm_arm.h
View File

@ -18,6 +18,7 @@
#ifndef __ARM64_KVM_ARM_H__
#define __ARM64_KVM_ARM_H__
#include <asm/memory.h>
#include <asm/types.h>
/* Hyp Configuration Register (HCR) bits */
@ -160,9 +161,9 @@
#endif
#define VTTBR_BADDR_SHIFT (VTTBR_X - 1)
#define VTTBR_BADDR_MASK (((1LLU << (PHYS_MASK_SHIFT - VTTBR_X)) - 1) << VTTBR_BADDR_SHIFT)
#define VTTBR_VMID_SHIFT (48LLU)
#define VTTBR_VMID_MASK (0xffLLU << VTTBR_VMID_SHIFT)
#define VTTBR_BADDR_MASK (((UL(1) << (PHYS_MASK_SHIFT - VTTBR_X)) - 1) << VTTBR_BADDR_SHIFT)
#define VTTBR_VMID_SHIFT (UL(48))
#define VTTBR_VMID_MASK (UL(0xFF) << VTTBR_VMID_SHIFT)
/* Hyp System Trap Register */
#define HSTR_EL2_TTEE (1 << 16)
@ -185,13 +186,13 @@
/* Exception Syndrome Register (ESR) bits */
#define ESR_EL2_EC_SHIFT (26)
#define ESR_EL2_EC (0x3fU << ESR_EL2_EC_SHIFT)
#define ESR_EL2_IL (1U << 25)
#define ESR_EL2_EC (UL(0x3f) << ESR_EL2_EC_SHIFT)
#define ESR_EL2_IL (UL(1) << 25)
#define ESR_EL2_ISS (ESR_EL2_IL - 1)
#define ESR_EL2_ISV_SHIFT (24)
#define ESR_EL2_ISV (1U << ESR_EL2_ISV_SHIFT)
#define ESR_EL2_ISV (UL(1) << ESR_EL2_ISV_SHIFT)
#define ESR_EL2_SAS_SHIFT (22)
#define ESR_EL2_SAS (3U << ESR_EL2_SAS_SHIFT)
#define ESR_EL2_SAS (UL(3) << ESR_EL2_SAS_SHIFT)
#define ESR_EL2_SSE (1 << 21)
#define ESR_EL2_SRT_SHIFT (16)
#define ESR_EL2_SRT_MASK (0x1f << ESR_EL2_SRT_SHIFT)
@ -205,16 +206,16 @@
#define ESR_EL2_FSC_TYPE (0x3c)
#define ESR_EL2_CV_SHIFT (24)
#define ESR_EL2_CV (1U << ESR_EL2_CV_SHIFT)
#define ESR_EL2_CV (UL(1) << ESR_EL2_CV_SHIFT)
#define ESR_EL2_COND_SHIFT (20)
#define ESR_EL2_COND (0xfU << ESR_EL2_COND_SHIFT)
#define ESR_EL2_COND (UL(0xf) << ESR_EL2_COND_SHIFT)
#define FSC_FAULT (0x04)
#define FSC_PERM (0x0c)
/* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
#define HPFAR_MASK (~0xFUL)
#define HPFAR_MASK (~UL(0xf))
#define ESR_EL2_EC_UNKNOWN (0x00)
#define ESR_EL2_EC_WFI (0x01)

1
arch/arm64/include/asm/opcodes.h Normal file
View File

@ -0,0 +1 @@
#include <../../arm/include/asm/opcodes.h>

215
arch/arm64/include/asm/percpu.h
View File

@ -44,6 +44,221 @@ static inline unsigned long __my_cpu_offset(void)
#endif /* CONFIG_SMP */
#define PERCPU_OP(op, asm_op) \
static inline unsigned long __percpu_##op(void *ptr, \
unsigned long val, int size) \
{ \
unsigned long loop, ret; \
\
switch (size) { \
case 1: \
do { \
asm ("//__per_cpu_" #op "_1\n" \
"ldxrb %w[ret], %[ptr]\n" \
#asm_op " %w[ret], %w[ret], %w[val]\n" \
"stxrb %w[loop], %w[ret], %[ptr]\n" \
: [loop] "=&r" (loop), [ret] "=&r" (ret), \
[ptr] "+Q"(*(u8 *)ptr) \
: [val] "Ir" (val)); \
} while (loop); \
break; \
case 2: \
do { \
asm ("//__per_cpu_" #op "_2\n" \
"ldxrh %w[ret], %[ptr]\n" \
#asm_op " %w[ret], %w[ret], %w[val]\n" \
"stxrh %w[loop], %w[ret], %[ptr]\n" \
: [loop] "=&r" (loop), [ret] "=&r" (ret), \
[ptr] "+Q"(*(u16 *)ptr) \
: [val] "Ir" (val)); \
} while (loop); \
break; \
case 4: \
do { \
asm ("//__per_cpu_" #op "_4\n" \
"ldxr %w[ret], %[ptr]\n" \
#asm_op " %w[ret], %w[ret], %w[val]\n" \
"stxr %w[loop], %w[ret], %[ptr]\n" \
: [loop] "=&r" (loop), [ret] "=&r" (ret), \
[ptr] "+Q"(*(u32 *)ptr) \
: [val] "Ir" (val)); \
} while (loop); \
break; \
case 8: \
do { \
asm ("//__per_cpu_" #op "_8\n" \
"ldxr %[ret], %[ptr]\n" \
#asm_op " %[ret], %[ret], %[val]\n" \
"stxr %w[loop], %[ret], %[ptr]\n" \
: [loop] "=&r" (loop), [ret] "=&r" (ret), \
[ptr] "+Q"(*(u64 *)ptr) \
: [val] "Ir" (val)); \
} while (loop); \
break; \
default: \
BUILD_BUG(); \
} \
\
return ret; \
}
PERCPU_OP(add, add)
PERCPU_OP(and, and)
PERCPU_OP(or, orr)
#undef PERCPU_OP
static inline unsigned long __percpu_read(void *ptr, int size)
{
unsigned long ret;
switch (size) {
case 1:
ret = ACCESS_ONCE(*(u8 *)ptr);
break;
case 2:
ret = ACCESS_ONCE(*(u16 *)ptr);
break;
case 4:
ret = ACCESS_ONCE(*(u32 *)ptr);
break;
case 8:
ret = ACCESS_ONCE(*(u64 *)ptr);
break;
default:
BUILD_BUG();
}
return ret;
}
static inline void __percpu_write(void *ptr, unsigned long val, int size)
{
switch (size) {
case 1:
ACCESS_ONCE(*(u8 *)ptr) = (u8)val;
break;
case 2:
ACCESS_ONCE(*(u16 *)ptr) = (u16)val;
break;
case 4:
ACCESS_ONCE(*(u32 *)ptr) = (u32)val;
break;
case 8:
ACCESS_ONCE(*(u64 *)ptr) = (u64)val;
break;
default:
BUILD_BUG();
}
}
static inline unsigned long __percpu_xchg(void *ptr, unsigned long val,
int size)
{
unsigned long ret, loop;
switch (size) {
case 1:
do {
asm ("//__percpu_xchg_1\n"
"ldxrb %w[ret], %[ptr]\n"
"stxrb %w[loop], %w[val], %[ptr]\n"
: [loop] "=&r"(loop), [ret] "=&r"(ret),
[ptr] "+Q"(*(u8 *)ptr)
: [val] "r" (val));
} while (loop);
break;
case 2:
do {
asm ("//__percpu_xchg_2\n"
"ldxrh %w[ret], %[ptr]\n"
"stxrh %w[loop], %w[val], %[ptr]\n"
: [loop] "=&r"(loop), [ret] "=&r"(ret),
[ptr] "+Q"(*(u16 *)ptr)
: [val] "r" (val));
} while (loop);
break;
case 4:
do {
asm ("//__percpu_xchg_4\n"
"ldxr %w[ret], %[ptr]\n"
"stxr %w[loop], %w[val], %[ptr]\n"
: [loop] "=&r"(loop), [ret] "=&r"(ret),
[ptr] "+Q"(*(u32 *)ptr)
: [val] "r" (val));
} while (loop);
break;
case 8:
do {
asm ("//__percpu_xchg_8\n"
"ldxr %[ret], %[ptr]\n"
"stxr %w[loop], %[val], %[ptr]\n"
: [loop] "=&r"(loop), [ret] "=&r"(ret),
[ptr] "+Q"(*(u64 *)ptr)
: [val] "r" (val));
} while (loop);
break;
default:
BUILD_BUG();
}
return ret;
}
#define _percpu_add(pcp, val) \
__percpu_add(raw_cpu_ptr(&(pcp)), val, sizeof(pcp))
#define _percpu_add_return(pcp, val) (typeof(pcp)) (_percpu_add(pcp, val))
#define _percpu_and(pcp, val) \
__percpu_and(raw_cpu_ptr(&(pcp)), val, sizeof(pcp))
#define _percpu_or(pcp, val) \
__percpu_or(raw_cpu_ptr(&(pcp)), val, sizeof(pcp))
#define _percpu_read(pcp) (typeof(pcp)) \
(__percpu_read(raw_cpu_ptr(&(pcp)), sizeof(pcp)))
#define _percpu_write(pcp, val) \
__percpu_write(raw_cpu_ptr(&(pcp)), (unsigned long)(val), sizeof(pcp))
#define _percpu_xchg(pcp, val) (typeof(pcp)) \
(__percpu_xchg(raw_cpu_ptr(&(pcp)), (unsigned long)(val), sizeof(pcp)))
#define this_cpu_add_1(pcp, val) _percpu_add(pcp, val)
#define this_cpu_add_2(pcp, val) _percpu_add(pcp, val)
#define this_cpu_add_4(pcp, val) _percpu_add(pcp, val)
#define this_cpu_add_8(pcp, val) _percpu_add(pcp, val)
#define this_cpu_add_return_1(pcp, val) _percpu_add_return(pcp, val)
#define this_cpu_add_return_2(pcp, val) _percpu_add_return(pcp, val)
#define this_cpu_add_return_4(pcp, val) _percpu_add_return(pcp, val)
#define this_cpu_add_return_8(pcp, val) _percpu_add_return(pcp, val)
#define this_cpu_and_1(pcp, val) _percpu_and(pcp, val)
#define this_cpu_and_2(pcp, val) _percpu_and(pcp, val)
#define this_cpu_and_4(pcp, val) _percpu_and(pcp, val)
#define this_cpu_and_8(pcp, val) _percpu_and(pcp, val)
#define this_cpu_or_1(pcp, val) _percpu_or(pcp, val)
#define this_cpu_or_2(pcp, val) _percpu_or(pcp, val)
#define this_cpu_or_4(pcp, val) _percpu_or(pcp, val)
#define this_cpu_or_8(pcp, val) _percpu_or(pcp, val)
#define this_cpu_read_1(pcp) _percpu_read(pcp)
#define this_cpu_read_2(pcp) _percpu_read(pcp)
#define this_cpu_read_4(pcp) _percpu_read(pcp)
#define this_cpu_read_8(pcp) _percpu_read(pcp)
#define this_cpu_write_1(pcp, val) _percpu_write(pcp, val)
#define this_cpu_write_2(pcp, val) _percpu_write(pcp, val)
#define this_cpu_write_4(pcp, val) _percpu_write(pcp, val)
#define this_cpu_write_8(pcp, val) _percpu_write(pcp, val)
#define this_cpu_xchg_1(pcp, val) _percpu_xchg(pcp, val)
#define this_cpu_xchg_2(pcp, val) _percpu_xchg(pcp, val)
#define this_cpu_xchg_4(pcp, val) _percpu_xchg(pcp, val)
#define this_cpu_xchg_8(pcp, val) _percpu_xchg(pcp, val)
#include <asm-generic/percpu.h>
#endif /* __ASM_PERCPU_H */

8
arch/arm64/include/asm/pgalloc.h
View File

@ -26,11 +26,13 @@
#define check_pgt_cache() do { } while (0)
#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
#if CONFIG_ARM64_PGTABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return (pmd_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
return (pmd_t *)__get_free_page(PGALLOC_GFP);
}
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
@ -50,7 +52,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return (pud_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
return (pud_t *)__get_free_page(PGALLOC_GFP);
}
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
@ -69,8 +71,6 @@ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
extern pgd_t *pgd_alloc(struct mm_struct *mm);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO)
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
{

25
arch/arm64/include/asm/seccomp.h Normal file
View File

@ -0,0 +1,25 @@
/*
* arch/arm64/include/asm/seccomp.h
*
* Copyright (C) 2014 Linaro Limited
* Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_SECCOMP_H
#define _ASM_SECCOMP_H
#include <asm/unistd.h>
#ifdef CONFIG_COMPAT
#define __NR_seccomp_read_32 __NR_compat_read
#define __NR_seccomp_write_32 __NR_compat_write
#define __NR_seccomp_exit_32 __NR_compat_exit
#define __NR_seccomp_sigreturn_32 __NR_compat_rt_sigreturn
#endif /* CONFIG_COMPAT */
#include <asm-generic/seccomp.h>
#endif /* _ASM_SECCOMP_H */

67
arch/arm64/include/asm/tlb.h
View File

@ -19,10 +19,6 @@
#ifndef __ASM_TLB_H
#define __ASM_TLB_H
#define __tlb_remove_pmd_tlb_entry __tlb_remove_pmd_tlb_entry
#include <asm-generic/tlb.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
@ -37,71 +33,22 @@ static inline void __tlb_remove_table(void *_table)
#define tlb_remove_entry(tlb, entry) tlb_remove_page(tlb, entry)
#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
/*
* There's three ways the TLB shootdown code is used:
* 1. Unmapping a range of vmas. See zap_page_range(), unmap_region().
* tlb->fullmm = 0, and tlb_start_vma/tlb_end_vma will be called.
* 2. Unmapping all vmas. See exit_mmap().
* tlb->fullmm = 1, and tlb_start_vma/tlb_end_vma will be called.
* Page tables will be freed.
* 3. Unmapping argument pages. See shift_arg_pages().
* tlb->fullmm = 0, but tlb_start_vma/tlb_end_vma will not be called.
*/
#include <asm-generic/tlb.h>
static inline void tlb_flush(struct mmu_gather *tlb)
{
if (tlb->fullmm) {
flush_tlb_mm(tlb->mm);
} else if (tlb->end > 0) {
} else {
struct vm_area_struct vma = { .vm_mm = tlb->mm, };
flush_tlb_range(&vma, tlb->start, tlb->end);
tlb->start = TASK_SIZE;
tlb->end = 0;
}
}
static inline void tlb_add_flush(struct mmu_gather *tlb, unsigned long addr)
{
if (!tlb->fullmm) {
tlb->start = min(tlb->start, addr);
tlb->end = max(tlb->end, addr + PAGE_SIZE);
}
}
/*
* Memorize the range for the TLB flush.
*/
static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
unsigned long addr)
{
tlb_add_flush(tlb, addr);
}
/*
* In the case of tlb vma handling, we can optimise these away in the
* case where we're doing a full MM flush. When we're doing a munmap,
* the vmas are adjusted to only cover the region to be torn down.
*/
static inline void tlb_start_vma(struct mmu_gather *tlb,
struct vm_area_struct *vma)
{
if (!tlb->fullmm) {
tlb->start = TASK_SIZE;
tlb->end = 0;
}
}
static inline void tlb_end_vma(struct mmu_gather *tlb,
struct vm_area_struct *vma)
{
if (!tlb->fullmm)
tlb_flush(tlb);
}
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
unsigned long addr)
{
pgtable_page_dtor(pte);
tlb_add_flush(tlb, addr);
tlb_remove_entry(tlb, pte);
}
@ -109,7 +56,6 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
unsigned long addr)
{
tlb_add_flush(tlb, addr);
tlb_remove_entry(tlb, virt_to_page(pmdp));
}
#endif
@ -118,15 +64,8 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
unsigned long addr)
{
tlb_add_flush(tlb, addr);
tlb_remove_entry(tlb, virt_to_page(pudp));
}
#endif
static inline void __tlb_remove_pmd_tlb_entry(struct mmu_gather *tlb, pmd_t *pmdp,
unsigned long address)
{
tlb_add_flush(tlb, address);
}
#endif

16
arch/arm64/include/asm/traps.h
View File

@ -18,6 +18,22 @@
#ifndef __ASM_TRAP_H
#define __ASM_TRAP_H
#include <linux/list.h>
struct pt_regs;
struct undef_hook {
struct list_head node;
u32 instr_mask;
u32 instr_val;
u64 pstate_mask;
u64 pstate_val;
int (*fn)(struct pt_regs *regs, u32 instr);
};
void register_undef_hook(struct undef_hook *hook);
void unregister_undef_hook(struct undef_hook *hook);
static inline int in_exception_text(unsigned long ptr)
{
extern char __exception_text_start[];

3
arch/arm64/include/asm/unistd.h
View File

@ -31,6 +31,9 @@
* Compat syscall numbers used by the AArch64 kernel.
*/
#define __NR_compat_restart_syscall 0
#define __NR_compat_exit 1
#define __NR_compat_read 3
#define __NR_compat_write 4
#define __NR_compat_sigreturn 119
#define __NR_compat_rt_sigreturn 173

3
arch/arm64/include/asm/unistd32.h
View File

@ -787,7 +787,8 @@ __SYSCALL(__NR_sched_setattr, sys_sched_setattr)
__SYSCALL(__NR_sched_getattr, sys_sched_getattr)
#define __NR_renameat2 382
__SYSCALL(__NR_renameat2, sys_renameat2)
/* 383 for seccomp */
#define __NR_seccomp 383
__SYSCALL(__NR_seccomp, sys_seccomp)
#define __NR_getrandom 384
__SYSCALL(__NR_getrandom, sys_getrandom)
#define __NR_memfd_create 385

7
arch/arm64/kernel/Makefile
View File

@ -5,6 +5,7 @@
CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
CFLAGS_efi-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
CFLAGS_armv8_deprecated.o := -I$(src)
CFLAGS_REMOVE_ftrace.o = -pg
CFLAGS_REMOVE_insn.o = -pg
@ -15,10 +16,11 @@ arm64-obj-y := cputable.o debug-monitors.o entry.o irq.o fpsimd.o \
entry-fpsimd.o process.o ptrace.o setup.o signal.o \
sys.o stacktrace.o time.o traps.o io.o vdso.o \
hyp-stub.o psci.o cpu_ops.o insn.o return_address.o \
cpuinfo.o
cpuinfo.o cpu_errata.o alternative.o
arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \
sys_compat.o
sys_compat.o \
../../arm/kernel/opcodes.o
arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
arm64-obj-$(CONFIG_SMP) += smp.o smp_spin_table.o topology.o
@ -31,6 +33,7 @@ arm64-obj-$(CONFIG_JUMP_LABEL) += jump_label.o
arm64-obj-$(CONFIG_KGDB) += kgdb.o
arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o
arm64-obj-$(CONFIG_PCI) += pci.o
arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o
obj-y += $(arm64-obj-y) vdso/
obj-m += $(arm64-obj-m)

85
arch/arm64/kernel/alternative.c Normal file
View File

@ -0,0 +1,85 @@
/*
* alternative runtime patching
* inspired by the x86 version
*
* Copyright (C) 2014 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define pr_fmt(fmt) "alternatives: " fmt
#include <linux/init.h>
#include <linux/cpu.h>
#include <asm/cacheflush.h>
#include <asm/alternative.h>
#include <asm/cpufeature.h>
#include <linux/stop_machine.h>
extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
struct alt_region {
struct alt_instr *begin;
struct alt_instr *end;
};
static int __apply_alternatives(void *alt_region)
{
struct alt_instr *alt;
struct alt_region *region = alt_region;
u8 *origptr, *replptr;
for (alt = region->begin; alt < region->end; alt++) {
if (!cpus_have_cap(alt->cpufeature))
continue;
BUG_ON(alt->alt_len > alt->orig_len);
pr_info_once("patching kernel code\n");
origptr = (u8 *)&alt->orig_offset + alt->orig_offset;
replptr = (u8 *)&alt->alt_offset + alt->alt_offset;
memcpy(origptr, replptr, alt->alt_len);
flush_icache_range((uintptr_t)origptr,
(uintptr_t)(origptr + alt->alt_len));
}
return 0;
}
void apply_alternatives_all(void)
{
struct alt_region region = {
.begin = __alt_instructions,
.end = __alt_instructions_end,
};
/* better not try code patching on a live SMP system */
stop_machine(__apply_alternatives, &region, NULL);
}
void apply_alternatives(void *start, size_t length)
{
struct alt_region region = {
.begin = start,
.end = start + length,
};
__apply_alternatives(&region);
}
void free_alternatives_memory(void)
{
free_reserved_area(__alt_instructions, __alt_instructions_end,
0, "alternatives");
}

553
arch/arm64/kernel/armv8_deprecated.c Normal file
View File

@ -0,0 +1,553 @@
/*
* Copyright (C) 2014 ARM Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/cpu.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/perf_event.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <asm/insn.h>
#include <asm/opcodes.h>
#include <asm/system_misc.h>
#include <asm/traps.h>
#include <asm/uaccess.h>
#define CREATE_TRACE_POINTS
#include "trace-events-emulation.h"
/*
* The runtime support for deprecated instruction support can be in one of
* following three states -
*
* 0 = undef
* 1 = emulate (software emulation)
* 2 = hw (supported in hardware)
*/
enum insn_emulation_mode {
INSN_UNDEF,
INSN_EMULATE,
INSN_HW,
};
enum legacy_insn_status {
INSN_DEPRECATED,
INSN_OBSOLETE,
};
struct insn_emulation_ops {
const char *name;
enum legacy_insn_status status;
struct undef_hook *hooks;
int (*set_hw_mode)(bool enable);
};
struct insn_emulation {
struct list_head node;
struct insn_emulation_ops *ops;
int current_mode;
int min;
int max;
};
static LIST_HEAD(insn_emulation);
static int nr_insn_emulated;
static DEFINE_RAW_SPINLOCK(insn_emulation_lock);
static void register_emulation_hooks(struct insn_emulation_ops *ops)
{
struct undef_hook *hook;
BUG_ON(!ops->hooks);
for (hook = ops->hooks; hook->instr_mask; hook++)
register_undef_hook(hook);
pr_notice("Registered %s emulation handler\n", ops->name);
}
static void remove_emulation_hooks(struct insn_emulation_ops *ops)
{
struct undef_hook *hook;
BUG_ON(!ops->hooks);
for (hook = ops->hooks; hook->instr_mask; hook++)
unregister_undef_hook(hook);
pr_notice("Removed %s emulation handler\n", ops->name);
}
static int update_insn_emulation_mode(struct insn_emulation *insn,
enum insn_emulation_mode prev)
{
int ret = 0;
switch (prev) {
case INSN_UNDEF: /* Nothing to be done */
break;
case INSN_EMULATE:
remove_emulation_hooks(insn->ops);
break;
case INSN_HW:
if (insn->ops->set_hw_mode) {
insn->ops->set_hw_mode(false);
pr_notice("Disabled %s support\n", insn->ops->name);
}
break;
}
switch (insn->current_mode) {
case INSN_UNDEF:
break;
case INSN_EMULATE:
register_emulation_hooks(insn->ops);
break;
case INSN_HW:
if (insn->ops->set_hw_mode && insn->ops->set_hw_mode(true))
pr_notice("Enabled %s support\n", insn->ops->name);
else
ret = -EINVAL;
break;
}
return ret;
}
static void register_insn_emulation(struct insn_emulation_ops *ops)
{
unsigned long flags;
struct insn_emulation *insn;
insn = kzalloc(sizeof(*insn), GFP_KERNEL);
insn->ops = ops;
insn->min = INSN_UNDEF;
switch (ops->status) {
case INSN_DEPRECATED:
insn->current_mode = INSN_EMULATE;
insn->max = INSN_HW;
break;
case INSN_OBSOLETE:
insn->current_mode = INSN_UNDEF;
insn->max = INSN_EMULATE;
break;
}
raw_spin_lock_irqsave(&insn_emulation_lock, flags);
list_add(&insn->node, &insn_emulation);
nr_insn_emulated++;
raw_spin_unlock_irqrestore(&insn_emulation_lock, flags);
/* Register any handlers if required */
update_insn_emulation_mode(insn, INSN_UNDEF);
}
static int emulation_proc_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos)
{
int ret = 0;
struct insn_emulation *insn = (struct insn_emulation *) table->data;
enum insn_emulation_mode prev_mode = insn->current_mode;
table->data = &insn->current_mode;
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
if (ret || !write || prev_mode == insn->current_mode)
goto ret;
ret = update_insn_emulation_mode(insn, prev_mode);
if (ret) {
/* Mode change failed, revert to previous mode. */
insn->current_mode = prev_mode;
update_insn_emulation_mode(insn, INSN_UNDEF);
}
ret:
table->data = insn;
return ret;
}
static struct ctl_table ctl_abi[] = {
{
.procname = "abi",
.mode = 0555,
},
{ }
};
static void register_insn_emulation_sysctl(struct ctl_table *table)
{
unsigned long flags;
int i = 0;
struct insn_emulation *insn;
struct ctl_table *insns_sysctl, *sysctl;
insns_sysctl = kzalloc(sizeof(*sysctl) * (nr_insn_emulated + 1),
GFP_KERNEL);
raw_spin_lock_irqsave(&insn_emulation_lock, flags);
list_for_each_entry(insn, &insn_emulation, node) {
sysctl = &insns_sysctl[i];
sysctl->mode = 0644;
sysctl->maxlen = sizeof(int);
sysctl->procname = insn->ops->name;
sysctl->data = insn;
sysctl->extra1 = &insn->min;
sysctl->extra2 = &insn->max;
sysctl->proc_handler = emulation_proc_handler;
i++;
}
raw_spin_unlock_irqrestore(&insn_emulation_lock, flags);
table->child = insns_sysctl;
register_sysctl_table(table);
}
/*
* Implement emulation of the SWP/SWPB instructions using load-exclusive and
* store-exclusive.
*
* Syntax of SWP{B} instruction: SWP{B}<c> <Rt>, <Rt2>, [<Rn>]
* Where: Rt = destination
* Rt2 = source
* Rn = address
*/
/*
* Error-checking SWP macros implemented using ldxr{b}/stxr{b}
*/
#define __user_swpX_asm(data, addr, res, temp, B) \
__asm__ __volatile__( \
" mov %w2, %w1\n" \
"0: ldxr"B" %w1, [%3]\n" \
"1: stxr"B" %w0, %w2, [%3]\n" \
" cbz %w0, 2f\n" \
" mov %w0, %w4\n" \
"2:\n" \
" .pushsection .fixup,\"ax\"\n" \
" .align 2\n" \
"3: mov %w0, %w5\n" \
" b 2b\n" \
" .popsection" \
" .pushsection __ex_table,\"a\"\n" \
" .align 3\n" \
" .quad 0b, 3b\n" \
" .quad 1b, 3b\n" \
" .popsection" \
: "=&r" (res), "+r" (data), "=&r" (temp) \
: "r" (addr), "i" (-EAGAIN), "i" (-EFAULT) \
: "memory")
#define __user_swp_asm(data, addr, res, temp) \
__user_swpX_asm(data, addr, res, temp, "")
#define __user_swpb_asm(data, addr, res, temp) \
__user_swpX_asm(data, addr, res, temp, "b")
/*
* Bit 22 of the instruction encoding distinguishes between
* the SWP and SWPB variants (bit set means SWPB).
*/
#define TYPE_SWPB (1 << 22)
/*
* Set up process info to signal segmentation fault - called on access error.
*/
static void set_segfault(struct pt_regs *regs, unsigned long addr)
{
siginfo_t info;
down_read(&current->mm->mmap_sem);
if (find_vma(current->mm, addr) == NULL)
info.si_code = SEGV_MAPERR;
else
info.si_code = SEGV_ACCERR;
up_read(&current->mm->mmap_sem);
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_addr = (void *) instruction_pointer(regs);
pr_debug("SWP{B} emulation: access caused memory abort!\n");
arm64_notify_die("Illegal memory access", regs, &info, 0);
}
static int emulate_swpX(unsigned int address, unsigned int *data,
unsigned int type)
{
unsigned int res = 0;
if ((type != TYPE_SWPB) && (address & 0x3)) {
/* SWP to unaligned address not permitted */
pr_debug("SWP instruction on unaligned pointer!\n");
return -EFAULT;
}
while (1) {
unsigned long temp;
if (type == TYPE_SWPB)
__user_swpb_asm(*data, address, res, temp);
else
__user_swp_asm(*data, address, res, temp);
if (likely(res != -EAGAIN) || signal_pending(current))
break;
cond_resched();
}
return res;
}
/*
* swp_handler logs the id of calling process, dissects the instruction, sanity
* checks the memory location, calls emulate_swpX for the actual operation and
* deals with fixup/error handling before returning
*/
static int swp_handler(struct pt_regs *regs, u32 instr)
{
u32 destreg, data, type, address = 0;
int rn, rt2, res = 0;
perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, regs->pc);
type = instr & TYPE_SWPB;
switch (arm_check_condition(instr, regs->pstate)) {
case ARM_OPCODE_CONDTEST_PASS:
break;
case ARM_OPCODE_CONDTEST_FAIL:
/* Condition failed - return to next instruction */
goto ret;
case ARM_OPCODE_CONDTEST_UNCOND:
/* If unconditional encoding - not a SWP, undef */
return -EFAULT;
default:
return -EINVAL;
}
rn = aarch32_insn_extract_reg_num(instr, A32_RN_OFFSET);
rt2 = aarch32_insn_extract_reg_num(instr, A32_RT2_OFFSET);
address = (u32)regs->user_regs.regs[rn];
data = (u32)regs->user_regs.regs[rt2];
destreg = aarch32_insn_extract_reg_num(instr, A32_RT_OFFSET);
pr_debug("addr in r%d->0x%08x, dest is r%d, source in r%d->0x%08x)\n",
rn, address, destreg,
aarch32_insn_extract_reg_num(instr, A32_RT2_OFFSET), data);
/* Check access in reasonable access range for both SWP and SWPB */
if (!access_ok(VERIFY_WRITE, (address & ~3), 4)) {
pr_debug("SWP{B} emulation: access to 0x%08x not allowed!\n",
address);
goto fault;
}
res = emulate_swpX(address, &data, type);
if (res == -EFAULT)
goto fault;
else if (res == 0)
regs->user_regs.regs[destreg] = data;
ret:
if (type == TYPE_SWPB)
trace_instruction_emulation("swpb", regs->pc);
else
trace_instruction_emulation("swp", regs->pc);
pr_warn_ratelimited("\"%s\" (%ld) uses obsolete SWP{B} instruction at 0x%llx\n",
current->comm, (unsigned long)current->pid, regs->pc);
regs->pc += 4;
return 0;
fault:
set_segfault(regs, address);
return 0;
}
/*
* Only emulate SWP/SWPB executed in ARM state/User mode.
* The kernel must be SWP free and SWP{B} does not exist in Thumb.
*/
static struct undef_hook swp_hooks[] = {
{
.instr_mask = 0x0fb00ff0,
.instr_val = 0x01000090,
.pstate_mask = COMPAT_PSR_MODE_MASK,
.pstate_val = COMPAT_PSR_MODE_USR,
.fn = swp_handler
},
{ }
};
static struct insn_emulation_ops swp_ops = {
.name = "swp",
.status = INSN_OBSOLETE,
.hooks = swp_hooks,
.set_hw_mode = NULL,
};
static int cp15barrier_handler(struct pt_regs *regs, u32 instr)
{
perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, regs->pc);
switch (arm_check_condition(instr, regs->pstate)) {
case ARM_OPCODE_CONDTEST_PASS:
break;
case ARM_OPCODE_CONDTEST_FAIL:
/* Condition failed - return to next instruction */
goto ret;
case ARM_OPCODE_CONDTEST_UNCOND:
/* If unconditional encoding - not a barrier instruction */
return -EFAULT;
default:
return -EINVAL;
}
switch (aarch32_insn_mcr_extract_crm(instr)) {
case 10:
/*
* dmb - mcr p15, 0, Rt, c7, c10, 5
* dsb - mcr p15, 0, Rt, c7, c10, 4
*/
if (aarch32_insn_mcr_extract_opc2(instr) == 5) {
dmb(sy);
trace_instruction_emulation(
"mcr p15, 0, Rt, c7, c10, 5 ; dmb", regs->pc);
} else {
dsb(sy);
trace_instruction_emulation(
"mcr p15, 0, Rt, c7, c10, 4 ; dsb", regs->pc);
}
break;
case 5:
/*
* isb - mcr p15, 0, Rt, c7, c5, 4
*
* Taking an exception or returning from one acts as an
* instruction barrier. So no explicit barrier needed here.
*/
trace_instruction_emulation(
"mcr p15, 0, Rt, c7, c5, 4 ; isb", regs->pc);
break;
}
ret:
pr_warn_ratelimited("\"%s\" (%ld) uses deprecated CP15 Barrier instruction at 0x%llx\n",
current->comm, (unsigned long)current->pid, regs->pc);
regs->pc += 4;
return 0;
}
#define SCTLR_EL1_CP15BEN (1 << 5)
static inline void config_sctlr_el1(u32 clear, u32 set)
{
u32 val;
asm volatile("mrs %0, sctlr_el1" : "=r" (val));
val &= ~clear;
val |= set;
asm volatile("msr sctlr_el1, %0" : : "r" (val));
}
static void enable_cp15_ben(void *info)
{
config_sctlr_el1(0, SCTLR_EL1_CP15BEN);
}
static void disable_cp15_ben(void *info)
{
config_sctlr_el1(SCTLR_EL1_CP15BEN, 0);
}
static int cpu_hotplug_notify(struct notifier_block *b,
unsigned long action, void *hcpu)
{
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
enable_cp15_ben(NULL);
return NOTIFY_DONE;
case CPU_DYING:
case CPU_DYING_FROZEN:
disable_cp15_ben(NULL);
return NOTIFY_DONE;
}
return NOTIFY_OK;
}
static struct notifier_block cpu_hotplug_notifier = {
.notifier_call = cpu_hotplug_notify,
};
static int cp15_barrier_set_hw_mode(bool enable)
{
if (enable) {
register_cpu_notifier(&cpu_hotplug_notifier);
on_each_cpu(enable_cp15_ben, NULL, true);
} else {
unregister_cpu_notifier(&cpu_hotplug_notifier);
on_each_cpu(disable_cp15_ben, NULL, true);
}
return true;
}
static struct undef_hook cp15_barrier_hooks[] = {
{
.instr_mask = 0x0fff0fdf,
.instr_val = 0x0e070f9a,
.pstate_mask = COMPAT_PSR_MODE_MASK,
.pstate_val = COMPAT_PSR_MODE_USR,
.fn = cp15barrier_handler,
},
{
.instr_mask = 0x0fff0fff,
.instr_val = 0x0e070f95,
.pstate_mask = COMPAT_PSR_MODE_MASK,
.pstate_val = COMPAT_PSR_MODE_USR,
.fn = cp15barrier_handler,
},
{ }
};
static struct insn_emulation_ops cp15_barrier_ops = {
.name = "cp15_barrier",
.status = INSN_DEPRECATED,
.hooks = cp15_barrier_hooks,
.set_hw_mode = cp15_barrier_set_hw_mode,
};
/*
* Invoked as late_initcall, since not needed before init spawned.
*/
static int __init armv8_deprecated_init(void)
{
if (IS_ENABLED(CONFIG_SWP_EMULATION))
register_insn_emulation(&swp_ops);
if (IS_ENABLED(CONFIG_CP15_BARRIER_EMULATION))
register_insn_emulation(&cp15_barrier_ops);
register_insn_emulation_sysctl(ctl_abi);
return 0;
}
late_initcall(armv8_deprecated_init);

111
arch/arm64/kernel/cpu_errata.c Normal file
View File

@ -0,0 +1,111 @@
/*
* Contains CPU specific errata definitions
*
* Copyright (C) 2014 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define pr_fmt(fmt) "alternatives: " fmt
#include <linux/types.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
#include <asm/cpufeature.h>
#define MIDR_CORTEX_A53 MIDR_CPU_PART(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
#define MIDR_CORTEX_A57 MIDR_CPU_PART(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
/*
* Add a struct or another datatype to the union below if you need
* different means to detect an affected CPU.
*/
struct arm64_cpu_capabilities {
const char *desc;
u16 capability;
bool (*is_affected)(struct arm64_cpu_capabilities *);
union {
struct {
u32 midr_model;
u32 midr_range_min, midr_range_max;
};
};
};
#define CPU_MODEL_MASK (MIDR_IMPLEMENTOR_MASK | MIDR_PARTNUM_MASK | \
MIDR_ARCHITECTURE_MASK)
static bool __maybe_unused
is_affected_midr_range(struct arm64_cpu_capabilities *entry)
{
u32 midr = read_cpuid_id();
if ((midr & CPU_MODEL_MASK) != entry->midr_model)
return false;
midr &= MIDR_REVISION_MASK | MIDR_VARIANT_MASK;
return (midr >= entry->midr_range_min && midr <= entry->midr_range_max);
}
#define MIDR_RANGE(model, min, max) \
.is_affected = is_affected_midr_range, \
.midr_model = model, \
.midr_range_min = min, \
.midr_range_max = max
struct arm64_cpu_capabilities arm64_errata[] = {
#if defined(CONFIG_ARM64_ERRATUM_826319) || \
defined(CONFIG_ARM64_ERRATUM_827319) || \
defined(CONFIG_ARM64_ERRATUM_824069)
{
/* Cortex-A53 r0p[012] */
.desc = "ARM errata 826319, 827319, 824069",
.capability = ARM64_WORKAROUND_CLEAN_CACHE,
MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x02),
},
#endif
#ifdef CONFIG_ARM64_ERRATUM_819472
{
/* Cortex-A53 r0p[01] */
.desc = "ARM errata 819472",
.capability = ARM64_WORKAROUND_CLEAN_CACHE,
MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x01),
},
#endif
#ifdef CONFIG_ARM64_ERRATUM_832075
{
/* Cortex-A57 r0p0 - r1p2 */
.desc = "ARM erratum 832075",
.capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
MIDR_RANGE(MIDR_CORTEX_A57, 0x00, 0x12),
},
#endif
{
}
};
void check_local_cpu_errata(void)
{
struct arm64_cpu_capabilities *cpus = arm64_errata;
int i;
for (i = 0; cpus[i].desc; i++) {
if (!cpus[i].is_affected(&cpus[i]))
continue;
if (!cpus_have_cap(cpus[i].capability))
pr_info("enabling workaround for %s\n", cpus[i].desc);
cpus_set_cap(cpus[i].capability);
}
}

23
arch/arm64/kernel/cpuinfo.c
View File

@ -18,6 +18,7 @@
#include <asm/cachetype.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
#include <asm/cpufeature.h>
#include <linux/bitops.h>
#include <linux/bug.h>
@ -110,6 +111,15 @@ static void cpuinfo_sanity_check(struct cpuinfo_arm64 *cur)
/* If different, timekeeping will be broken (especially with KVM) */
diff |= CHECK(cntfrq, boot, cur, cpu);
/*
* The kernel uses self-hosted debug features and expects CPUs to
* support identical debug features. We presently need CTX_CMPs, WRPs,
* and BRPs to be identical.
* ID_AA64DFR1 is currently RES0.
*/
diff |= CHECK(id_aa64dfr0, boot, cur, cpu);
diff |= CHECK(id_aa64dfr1, boot, cur, cpu);
/*
* Even in big.LITTLE, processors should be identical instruction-set
* wise.
@ -143,7 +153,12 @@ static void cpuinfo_sanity_check(struct cpuinfo_arm64 *cur)
diff |= CHECK(id_isar3, boot, cur, cpu);
diff |= CHECK(id_isar4, boot, cur, cpu);
diff |= CHECK(id_isar5, boot, cur, cpu);
diff |= CHECK(id_mmfr0, boot, cur, cpu);
/*
* Regardless of the value of the AuxReg field, the AIFSR, ADFSR, and
* ACTLR formats could differ across CPUs and therefore would have to
* be trapped for virtualization anyway.
*/
diff |= CHECK_MASK(id_mmfr0, 0xff0fffff, boot, cur, cpu);
diff |= CHECK(id_mmfr1, boot, cur, cpu);
diff |= CHECK(id_mmfr2, boot, cur, cpu);
diff |= CHECK(id_mmfr3, boot, cur, cpu);
@ -155,7 +170,7 @@ static void cpuinfo_sanity_check(struct cpuinfo_arm64 *cur)
* pretend to support them.
*/
WARN_TAINT_ONCE(diff, TAINT_CPU_OUT_OF_SPEC,
"Unsupported CPU feature variation.");
"Unsupported CPU feature variation.\n");
}
static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info)
@ -165,6 +180,8 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info)
info->reg_dczid = read_cpuid(DCZID_EL0);
info->reg_midr = read_cpuid_id();
info->reg_id_aa64dfr0 = read_cpuid(ID_AA64DFR0_EL1);
info->reg_id_aa64dfr1 = read_cpuid(ID_AA64DFR1_EL1);
info->reg_id_aa64isar0 = read_cpuid(ID_AA64ISAR0_EL1);
info->reg_id_aa64isar1 = read_cpuid(ID_AA64ISAR1_EL1);
info->reg_id_aa64mmfr0 = read_cpuid(ID_AA64MMFR0_EL1);
@ -186,6 +203,8 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info)
info->reg_id_pfr1 = read_cpuid(ID_PFR1_EL1);
cpuinfo_detect_icache_policy(info);
check_local_cpu_errata();
}
void cpuinfo_store_cpu(void)

3
arch/arm64/kernel/efi-entry.S
View File

@ -61,7 +61,8 @@ ENTRY(efi_stub_entry)
*/
mov x20, x0 // DTB address
ldr x0, [sp, #16] // relocated _text address
mov x21, x0
ldr x21, =stext_offset
add x21, x0, x21
/*
* Calculate size of the kernel Image (same for original and copy).

37
arch/arm64/kernel/efi.c
View File

@ -11,6 +11,7 @@
*
*/
#include <linux/dmi.h>
#include <linux/efi.h>
#include <linux/export.h>
#include <linux/memblock.h>
@ -112,8 +113,6 @@ static int __init uefi_init(void)
efi.systab->hdr.revision & 0xffff, vendor);
retval = efi_config_init(NULL);
if (retval == 0)
set_bit(EFI_CONFIG_TABLES, &efi.flags);
out:
early_memunmap(efi.systab, sizeof(efi_system_table_t));
@ -125,17 +124,17 @@ out:
*/
static __init int is_reserve_region(efi_memory_desc_t *md)
{
if (!is_normal_ram(md))
switch (md->type) {
case EFI_LOADER_CODE:
case EFI_LOADER_DATA:
case EFI_BOOT_SERVICES_CODE:
case EFI_BOOT_SERVICES_DATA:
case EFI_CONVENTIONAL_MEMORY:
return 0;
if (md->attribute & EFI_MEMORY_RUNTIME)
return 1;
if (md->type == EFI_ACPI_RECLAIM_MEMORY ||
md->type == EFI_RESERVED_TYPE)
return 1;
return 0;
default:
break;
}
return is_normal_ram(md);
}
static __init void reserve_regions(void)
@ -471,3 +470,17 @@ err_unmap:
return -1;
}
early_initcall(arm64_enter_virtual_mode);
static int __init arm64_dmi_init(void)
{
/*
* On arm64, DMI depends on UEFI, and dmi_scan_machine() needs to
* be called early because dmi_id_init(), which is an arch_initcall
* itself, depends on dmi_scan_machine() having been called already.
*/
dmi_scan_machine();
if (dmi_available)
dmi_set_dump_stack_arch_desc();
return 0;
}
core_initcall(arm64_dmi_init);

19
arch/arm64/kernel/entry-ftrace.S
View File

@ -98,8 +98,8 @@
ENTRY(_mcount)
mcount_enter
ldr x0, =ftrace_trace_function
ldr x2, [x0]
adrp x0, ftrace_trace_function
ldr x2, [x0, #:lo12:ftrace_trace_function]
adr x0, ftrace_stub
cmp x0, x2 // if (ftrace_trace_function
b.eq skip_ftrace_call // != ftrace_stub) {
@ -115,14 +115,15 @@ skip_ftrace_call: // return;
mcount_exit // return;
// }
skip_ftrace_call:
ldr x1, =ftrace_graph_return
ldr x2, [x1] // if ((ftrace_graph_return
cmp x0, x2 // != ftrace_stub)
b.ne ftrace_graph_caller
adrp x1, ftrace_graph_return
ldr x2, [x1, #:lo12:ftrace_graph_return]
cmp x0, x2 // if ((ftrace_graph_return
b.ne ftrace_graph_caller // != ftrace_stub)
ldr x1, =ftrace_graph_entry // || (ftrace_graph_entry
ldr x2, [x1] // != ftrace_graph_entry_stub))
ldr x0, =ftrace_graph_entry_stub
adrp x1, ftrace_graph_entry // || (ftrace_graph_entry
adrp x0, ftrace_graph_entry_stub // != ftrace_graph_entry_stub))
ldr x2, [x1, #:lo12:ftrace_graph_entry]
add x0, x0, #:lo12:ftrace_graph_entry_stub
cmp x0, x2
b.ne ftrace_graph_caller // ftrace_graph_caller();

144
arch/arm64/kernel/entry.S
View File

@ -64,25 +64,26 @@
#define BAD_ERROR 3
.macro kernel_entry, el, regsize = 64
sub sp, sp, #S_FRAME_SIZE - S_LR // room for LR, SP, SPSR, ELR
sub sp, sp, #S_FRAME_SIZE
.if \regsize == 32
mov w0, w0 // zero upper 32 bits of x0
.endif
push x28, x29
push x26, x27
push x24, x25
push x22, x23
push x20, x21
push x18, x19
push x16, x17
push x14, x15
push x12, x13
push x10, x11
push x8, x9
push x6, x7
push x4, x5
push x2, x3
push x0, x1
stp x0, x1, [sp, #16 * 0]
stp x2, x3, [sp, #16 * 1]
stp x4, x5, [sp, #16 * 2]
stp x6, x7, [sp, #16 * 3]
stp x8, x9, [sp, #16 * 4]
stp x10, x11, [sp, #16 * 5]
stp x12, x13, [sp, #16 * 6]
stp x14, x15, [sp, #16 * 7]
stp x16, x17, [sp, #16 * 8]
stp x18, x19, [sp, #16 * 9]
stp x20, x21, [sp, #16 * 10]
stp x22, x23, [sp, #16 * 11]
stp x24, x25, [sp, #16 * 12]
stp x26, x27, [sp, #16 * 13]
stp x28, x29, [sp, #16 * 14]
.if \el == 0
mrs x21, sp_el0
get_thread_info tsk // Ensure MDSCR_EL1.SS is clear,
@ -118,33 +119,31 @@
.if \el == 0
ct_user_enter
ldr x23, [sp, #S_SP] // load return stack pointer
.endif
.if \ret
ldr x1, [sp, #S_X1] // preserve x0 (syscall return)
add sp, sp, S_X2
.else
pop x0, x1
.endif
pop x2, x3 // load the rest of the registers
pop x4, x5
pop x6, x7
pop x8, x9
msr elr_el1, x21 // set up the return data
msr spsr_el1, x22
.if \el == 0
msr sp_el0, x23
.endif
pop x10, x11
pop x12, x13
pop x14, x15
pop x16, x17
pop x18, x19
pop x20, x21
pop x22, x23
pop x24, x25
pop x26, x27
pop x28, x29
ldr lr, [sp], #S_FRAME_SIZE - S_LR // load LR and restore SP
msr elr_el1, x21 // set up the return data
msr spsr_el1, x22
.if \ret
ldr x1, [sp, #S_X1] // preserve x0 (syscall return)
.else
ldp x0, x1, [sp, #16 * 0]
.endif
ldp x2, x3, [sp, #16 * 1]
ldp x4, x5, [sp, #16 * 2]
ldp x6, x7, [sp, #16 * 3]
ldp x8, x9, [sp, #16 * 4]
ldp x10, x11, [sp, #16 * 5]
ldp x12, x13, [sp, #16 * 6]
ldp x14, x15, [sp, #16 * 7]
ldp x16, x17, [sp, #16 * 8]
ldp x18, x19, [sp, #16 * 9]
ldp x20, x21, [sp, #16 * 10]
ldp x22, x23, [sp, #16 * 11]
ldp x24, x25, [sp, #16 * 12]
ldp x26, x27, [sp, #16 * 13]
ldp x28, x29, [sp, #16 * 14]
ldr lr, [sp, #S_LR]
add sp, sp, #S_FRAME_SIZE // restore sp
eret // return to kernel
.endm
@ -168,7 +167,8 @@ tsk .req x28 // current thread_info
* Interrupt handling.
*/
.macro irq_handler
ldr x1, handle_arch_irq
adrp x1, handle_arch_irq
ldr x1, [x1, #:lo12:handle_arch_irq]
mov x0, sp
blr x1
.endm
@ -455,8 +455,8 @@ el0_da:
bic x0, x26, #(0xff << 56)
mov x1, x25
mov x2, sp
adr lr, ret_to_user
b do_mem_abort
bl do_mem_abort
b ret_to_user
el0_ia:
/*
* Instruction abort handling
@ -468,8 +468,8 @@ el0_ia:
mov x0, x26
orr x1, x25, #1 << 24 // use reserved ISS bit for instruction aborts
mov x2, sp
adr lr, ret_to_user
b do_mem_abort
bl do_mem_abort
b ret_to_user
el0_fpsimd_acc:
/*
* Floating Point or Advanced SIMD access
@ -478,8 +478,8 @@ el0_fpsimd_acc:
ct_user_exit
mov x0, x25
mov x1, sp
adr lr, ret_to_user
b do_fpsimd_acc
bl do_fpsimd_acc
b ret_to_user
el0_fpsimd_exc:
/*
* Floating Point or Advanced SIMD exception
@ -488,8 +488,8 @@ el0_fpsimd_exc:
ct_user_exit
mov x0, x25
mov x1, sp
adr lr, ret_to_user
b do_fpsimd_exc
bl do_fpsimd_exc
b ret_to_user
el0_sp_pc:
/*
* Stack or PC alignment exception handling
@ -500,8 +500,8 @@ el0_sp_pc:
mov x0, x26
mov x1, x25
mov x2, sp
adr lr, ret_to_user
b do_sp_pc_abort
bl do_sp_pc_abort
b ret_to_user
el0_undef:
/*
* Undefined instruction
@ -510,8 +510,8 @@ el0_undef:
enable_dbg_and_irq
ct_user_exit
mov x0, sp
adr lr, ret_to_user
b do_undefinstr
bl do_undefinstr
b ret_to_user
el0_dbg:
/*
* Debug exception handling
@ -530,8 +530,8 @@ el0_inv:
mov x0, sp
mov x1, #BAD_SYNC
mrs x2, esr_el1
adr lr, ret_to_user
b bad_mode
bl bad_mode
b ret_to_user
ENDPROC(el0_sync)
.align 6
@ -653,14 +653,15 @@ el0_svc_naked: // compat entry point
ldr x16, [tsk, #TI_FLAGS] // check for syscall hooks
tst x16, #_TIF_SYSCALL_WORK
b.ne __sys_trace
adr lr, ret_fast_syscall // return address
cmp scno, sc_nr // check upper syscall limit
b.hs ni_sys
ldr x16, [stbl, scno, lsl #3] // address in the syscall table
br x16 // call sys_* routine
blr x16 // call sys_* routine
b ret_fast_syscall
ni_sys:
mov x0, sp
b do_ni_syscall
bl do_ni_syscall
b ret_fast_syscall
ENDPROC(el0_svc)
/*
@ -668,26 +669,38 @@ ENDPROC(el0_svc)
* switches, and waiting for our parent to respond.
*/
__sys_trace:
mov x0, sp
mov w0, #-1 // set default errno for
cmp scno, x0 // user-issued syscall(-1)
b.ne 1f
mov x0, #-ENOSYS
str x0, [sp, #S_X0]
1: mov x0, sp
bl syscall_trace_enter
adr lr, __sys_trace_return // return address
cmp w0, #-1 // skip the syscall?
b.eq __sys_trace_return_skipped
uxtw scno, w0 // syscall number (possibly new)
mov x1, sp // pointer to regs
cmp scno, sc_nr // check upper syscall limit
b.hs ni_sys
b.hs __ni_sys_trace
ldp x0, x1, [sp] // restore the syscall args
ldp x2, x3, [sp, #S_X2]
ldp x4, x5, [sp, #S_X4]
ldp x6, x7, [sp, #S_X6]
ldr x16, [stbl, scno, lsl #3] // address in the syscall table
br x16 // call sys_* routine
blr x16 // call sys_* routine
__sys_trace_return:
str x0, [sp] // save returned x0
str x0, [sp, #S_X0] // save returned x0
__sys_trace_return_skipped:
mov x0, sp
bl syscall_trace_exit
b ret_to_user
__ni_sys_trace:
mov x0, sp
bl do_ni_syscall
b __sys_trace_return
/*
* Special system call wrappers.
*/
@ -695,6 +708,3 @@ ENTRY(sys_rt_sigreturn_wrapper)
mov x0, sp
b sys_rt_sigreturn
ENDPROC(sys_rt_sigreturn_wrapper)
ENTRY(handle_arch_irq)
.quad 0

538
arch/arm64/kernel/head.S
View File

@ -132,6 +132,8 @@ efi_head:
#endif
#ifdef CONFIG_EFI
.globl stext_offset
.set stext_offset, stext - efi_head
.align 3
pe_header:
.ascii "PE"
@ -155,12 +157,12 @@ optional_header:
.long 0 // SizeOfInitializedData
.long 0 // SizeOfUninitializedData
.long efi_stub_entry - efi_head // AddressOfEntryPoint
.long stext - efi_head // BaseOfCode
.long stext_offset // BaseOfCode
extra_header_fields:
.quad 0 // ImageBase
.long 0x20 // SectionAlignment
.long 0x8 // FileAlignment
.long 0x1000 // SectionAlignment
.long PECOFF_FILE_ALIGNMENT // FileAlignment
.short 0 // MajorOperatingSystemVersion
.short 0 // MinorOperatingSystemVersion
.short 0 // MajorImageVersion
@ -172,7 +174,7 @@ extra_header_fields:
.long _end - efi_head // SizeOfImage
// Everything before the kernel image is considered part of the header
.long stext - efi_head // SizeOfHeaders
.long stext_offset // SizeOfHeaders
.long 0 // CheckSum
.short 0xa // Subsystem (EFI application)
.short 0 // DllCharacteristics
@ -217,16 +219,24 @@ section_table:
.byte 0
.byte 0 // end of 0 padding of section name
.long _end - stext // VirtualSize
.long stext - efi_head // VirtualAddress
.long stext_offset // VirtualAddress
.long _edata - stext // SizeOfRawData
.long stext - efi_head // PointerToRawData
.long stext_offset // PointerToRawData
.long 0 // PointerToRelocations (0 for executables)
.long 0 // PointerToLineNumbers (0 for executables)
.short 0 // NumberOfRelocations (0 for executables)
.short 0 // NumberOfLineNumbers (0 for executables)
.long 0xe0500020 // Characteristics (section flags)
.align 5
/*
* EFI will load stext onwards at the 4k section alignment
* described in the PE/COFF header. To ensure that instruction
* sequences using an adrp and a :lo12: immediate will function
* correctly at this alignment, we must ensure that stext is
* placed at a 4k boundary in the Image to begin with.
*/
.align 12
#endif
ENTRY(stext)
@ -238,7 +248,13 @@ ENTRY(stext)
mov x0, x22
bl lookup_processor_type
mov x23, x0 // x23=current cpu_table
cbz x23, __error_p // invalid processor (x23=0)?
/*
* __error_p may end up out of range for cbz if text areas are
* aligned up to section sizes.
*/
cbnz x23, 1f // invalid processor (x23=0)?
b __error_p
1:
bl __vet_fdt
bl __create_page_tables // x25=TTBR0, x26=TTBR1
/*
@ -250,247 +266,31 @@ ENTRY(stext)
*/
ldr x27, __switch_data // address to jump to after
// MMU has been enabled
adr lr, __enable_mmu // return (PIC) address
adrp lr, __enable_mmu // return (PIC) address
add lr, lr, #:lo12:__enable_mmu
ldr x12, [x23, #CPU_INFO_SETUP]
add x12, x12, x28 // __virt_to_phys
br x12 // initialise processor
ENDPROC(stext)
/*
* If we're fortunate enough to boot at EL2, ensure that the world is
* sane before dropping to EL1.
*
* Returns either BOOT_CPU_MODE_EL1 or BOOT_CPU_MODE_EL2 in x20 if
* booted in EL1 or EL2 respectively.
* Determine validity of the x21 FDT pointer.
* The dtb must be 8-byte aligned and live in the first 512M of memory.
*/
ENTRY(el2_setup)
mrs x0, CurrentEL
cmp x0, #CurrentEL_EL2
__vet_fdt:
tst x21, #0x7
b.ne 1f
mrs x0, sctlr_el2
CPU_BE( orr x0, x0, #(1 << 25) ) // Set the EE bit for EL2
CPU_LE( bic x0, x0, #(1 << 25) ) // Clear the EE bit for EL2
msr sctlr_el2, x0
b 2f
1: mrs x0, sctlr_el1
CPU_BE( orr x0, x0, #(3 << 24) ) // Set the EE and E0E bits for EL1
CPU_LE( bic x0, x0, #(3 << 24) ) // Clear the EE and E0E bits for EL1
msr sctlr_el1, x0
mov w20, #BOOT_CPU_MODE_EL1 // This cpu booted in EL1
isb
cmp x21, x24
b.lt 1f
mov x0, #(1 << 29)
add x0, x0, x24
cmp x21, x0
b.ge 1f
ret
/* Hyp configuration. */
2: mov x0, #(1 << 31) // 64-bit EL1
msr hcr_el2, x0
/* Generic timers. */
mrs x0, cnthctl_el2
orr x0, x0, #3 // Enable EL1 physical timers
msr cnthctl_el2, x0
msr cntvoff_el2, xzr // Clear virtual offset
#ifdef CONFIG_ARM_GIC_V3
/* GICv3 system register access */
mrs x0, id_aa64pfr0_el1
ubfx x0, x0, #24, #4
cmp x0, #1
b.ne 3f
mrs_s x0, ICC_SRE_EL2
orr x0, x0, #ICC_SRE_EL2_SRE // Set ICC_SRE_EL2.SRE==1
orr x0, x0, #ICC_SRE_EL2_ENABLE // Set ICC_SRE_EL2.Enable==1
msr_s ICC_SRE_EL2, x0
isb // Make sure SRE is now set
msr_s ICH_HCR_EL2, xzr // Reset ICC_HCR_EL2 to defaults
3:
#endif
/* Populate ID registers. */
mrs x0, midr_el1
mrs x1, mpidr_el1
msr vpidr_el2, x0
msr vmpidr_el2, x1
/* sctlr_el1 */
mov x0, #0x0800 // Set/clear RES{1,0} bits
CPU_BE( movk x0, #0x33d0, lsl #16 ) // Set EE and E0E on BE systems
CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
msr sctlr_el1, x0
/* Coprocessor traps. */
mov x0, #0x33ff
msr cptr_el2, x0 // Disable copro. traps to EL2
#ifdef CONFIG_COMPAT
msr hstr_el2, xzr // Disable CP15 traps to EL2
#endif
/* Stage-2 translation */
msr vttbr_el2, xzr
/* Hypervisor stub */
adr x0, __hyp_stub_vectors
msr vbar_el2, x0
/* spsr */
mov x0, #(PSR_F_BIT | PSR_I_BIT | PSR_A_BIT | PSR_D_BIT |\
PSR_MODE_EL1h)
msr spsr_el2, x0
msr elr_el2, lr
mov w20, #BOOT_CPU_MODE_EL2 // This CPU booted in EL2
eret
ENDPROC(el2_setup)
/*
* Sets the __boot_cpu_mode flag depending on the CPU boot mode passed
* in x20. See arch/arm64/include/asm/virt.h for more info.
*/
ENTRY(set_cpu_boot_mode_flag)
ldr x1, =__boot_cpu_mode // Compute __boot_cpu_mode
add x1, x1, x28
cmp w20, #BOOT_CPU_MODE_EL2
b.ne 1f
add x1, x1, #4
1: str w20, [x1] // This CPU has booted in EL1
dmb sy
dc ivac, x1 // Invalidate potentially stale cache line
1:
mov x21, #0
ret
ENDPROC(set_cpu_boot_mode_flag)
/*
* We need to find out the CPU boot mode long after boot, so we need to
* store it in a writable variable.
*
* This is not in .bss, because we set it sufficiently early that the boot-time
* zeroing of .bss would clobber it.
*/
.pushsection .data..cacheline_aligned
ENTRY(__boot_cpu_mode)
.align L1_CACHE_SHIFT
.long BOOT_CPU_MODE_EL2
.long 0
.popsection
#ifdef CONFIG_SMP
.align 3
1: .quad .
.quad secondary_holding_pen_release
/*
* This provides a "holding pen" for platforms to hold all secondary
* cores are held until we're ready for them to initialise.
*/
ENTRY(secondary_holding_pen)
bl el2_setup // Drop to EL1, w20=cpu_boot_mode
bl __calc_phys_offset // x24=PHYS_OFFSET, x28=PHYS_OFFSET-PAGE_OFFSET
bl set_cpu_boot_mode_flag
mrs x0, mpidr_el1
ldr x1, =MPIDR_HWID_BITMASK
and x0, x0, x1
adr x1, 1b
ldp x2, x3, [x1]
sub x1, x1, x2
add x3, x3, x1
pen: ldr x4, [x3]
cmp x4, x0
b.eq secondary_startup
wfe
b pen
ENDPROC(secondary_holding_pen)
/*
* Secondary entry point that jumps straight into the kernel. Only to
* be used where CPUs are brought online dynamically by the kernel.
*/
ENTRY(secondary_entry)
bl el2_setup // Drop to EL1
bl __calc_phys_offset // x24=PHYS_OFFSET, x28=PHYS_OFFSET-PAGE_OFFSET
bl set_cpu_boot_mode_flag
b secondary_startup
ENDPROC(secondary_entry)
ENTRY(secondary_startup)
/*
* Common entry point for secondary CPUs.
*/
mrs x22, midr_el1 // x22=cpuid
mov x0, x22
bl lookup_processor_type
mov x23, x0 // x23=current cpu_table
cbz x23, __error_p // invalid processor (x23=0)?
pgtbl x25, x26, x28 // x25=TTBR0, x26=TTBR1
ldr x12, [x23, #CPU_INFO_SETUP]
add x12, x12, x28 // __virt_to_phys
blr x12 // initialise processor
ldr x21, =secondary_data
ldr x27, =__secondary_switched // address to jump to after enabling the MMU
b __enable_mmu
ENDPROC(secondary_startup)
ENTRY(__secondary_switched)
ldr x0, [x21] // get secondary_data.stack
mov sp, x0
mov x29, #0
b secondary_start_kernel
ENDPROC(__secondary_switched)
#endif /* CONFIG_SMP */
/*
* Setup common bits before finally enabling the MMU. Essentially this is just
* loading the page table pointer and vector base registers.
*
* On entry to this code, x0 must contain the SCTLR_EL1 value for turning on
* the MMU.
*/
__enable_mmu:
ldr x5, =vectors
msr vbar_el1, x5
msr ttbr0_el1, x25 // load TTBR0
msr ttbr1_el1, x26 // load TTBR1
isb
b __turn_mmu_on
ENDPROC(__enable_mmu)
/*
* Enable the MMU. This completely changes the structure of the visible memory
* space. You will not be able to trace execution through this.
*
* x0 = system control register
* x27 = *virtual* address to jump to upon completion
*
* other registers depend on the function called upon completion
*
* We align the entire function to the smallest power of two larger than it to
* ensure it fits within a single block map entry. Otherwise were PHYS_OFFSET
* close to the end of a 512MB or 1GB block we might require an additional
* table to map the entire function.
*/
.align 4
__turn_mmu_on:
msr sctlr_el1, x0
isb
br x27
ENDPROC(__turn_mmu_on)
/*
* Calculate the start of physical memory.
*/
__calc_phys_offset:
adr x0, 1f
ldp x1, x2, [x0]
sub x28, x0, x1 // x28 = PHYS_OFFSET - PAGE_OFFSET
add x24, x2, x28 // x24 = PHYS_OFFSET
ret
ENDPROC(__calc_phys_offset)
.align 3
1: .quad .
.quad PAGE_OFFSET
ENDPROC(__vet_fdt)
/*
* Macro to create a table entry to the next page.
*
@ -668,6 +468,247 @@ __mmap_switched:
b start_kernel
ENDPROC(__mmap_switched)
/*
* end early head section, begin head code that is also used for
* hotplug and needs to have the same protections as the text region
*/
.section ".text","ax"
/*
* If we're fortunate enough to boot at EL2, ensure that the world is
* sane before dropping to EL1.
*
* Returns either BOOT_CPU_MODE_EL1 or BOOT_CPU_MODE_EL2 in x20 if
* booted in EL1 or EL2 respectively.
*/
ENTRY(el2_setup)
mrs x0, CurrentEL
cmp x0, #CurrentEL_EL2
b.ne 1f
mrs x0, sctlr_el2
CPU_BE( orr x0, x0, #(1 << 25) ) // Set the EE bit for EL2
CPU_LE( bic x0, x0, #(1 << 25) ) // Clear the EE bit for EL2
msr sctlr_el2, x0
b 2f
1: mrs x0, sctlr_el1
CPU_BE( orr x0, x0, #(3 << 24) ) // Set the EE and E0E bits for EL1
CPU_LE( bic x0, x0, #(3 << 24) ) // Clear the EE and E0E bits for EL1
msr sctlr_el1, x0
mov w20, #BOOT_CPU_MODE_EL1 // This cpu booted in EL1
isb
ret
/* Hyp configuration. */
2: mov x0, #(1 << 31) // 64-bit EL1
msr hcr_el2, x0
/* Generic timers. */
mrs x0, cnthctl_el2
orr x0, x0, #3 // Enable EL1 physical timers
msr cnthctl_el2, x0
msr cntvoff_el2, xzr // Clear virtual offset
#ifdef CONFIG_ARM_GIC_V3
/* GICv3 system register access */
mrs x0, id_aa64pfr0_el1
ubfx x0, x0, #24, #4
cmp x0, #1
b.ne 3f
mrs_s x0, ICC_SRE_EL2
orr x0, x0, #ICC_SRE_EL2_SRE // Set ICC_SRE_EL2.SRE==1
orr x0, x0, #ICC_SRE_EL2_ENABLE // Set ICC_SRE_EL2.Enable==1
msr_s ICC_SRE_EL2, x0
isb // Make sure SRE is now set
msr_s ICH_HCR_EL2, xzr // Reset ICC_HCR_EL2 to defaults
3:
#endif
/* Populate ID registers. */
mrs x0, midr_el1
mrs x1, mpidr_el1
msr vpidr_el2, x0
msr vmpidr_el2, x1
/* sctlr_el1 */
mov x0, #0x0800 // Set/clear RES{1,0} bits
CPU_BE( movk x0, #0x33d0, lsl #16 ) // Set EE and E0E on BE systems
CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
msr sctlr_el1, x0
/* Coprocessor traps. */
mov x0, #0x33ff
msr cptr_el2, x0 // Disable copro. traps to EL2
#ifdef CONFIG_COMPAT
msr hstr_el2, xzr // Disable CP15 traps to EL2
#endif
/* Stage-2 translation */
msr vttbr_el2, xzr
/* Hypervisor stub */
adrp x0, __hyp_stub_vectors
add x0, x0, #:lo12:__hyp_stub_vectors
msr vbar_el2, x0
/* spsr */
mov x0, #(PSR_F_BIT | PSR_I_BIT | PSR_A_BIT | PSR_D_BIT |\
PSR_MODE_EL1h)
msr spsr_el2, x0
msr elr_el2, lr
mov w20, #BOOT_CPU_MODE_EL2 // This CPU booted in EL2
eret
ENDPROC(el2_setup)
/*
* Sets the __boot_cpu_mode flag depending on the CPU boot mode passed
* in x20. See arch/arm64/include/asm/virt.h for more info.
*/
ENTRY(set_cpu_boot_mode_flag)
ldr x1, =__boot_cpu_mode // Compute __boot_cpu_mode
add x1, x1, x28
cmp w20, #BOOT_CPU_MODE_EL2
b.ne 1f
add x1, x1, #4
1: str w20, [x1] // This CPU has booted in EL1
dmb sy
dc ivac, x1 // Invalidate potentially stale cache line
ret
ENDPROC(set_cpu_boot_mode_flag)
/*
* We need to find out the CPU boot mode long after boot, so we need to
* store it in a writable variable.
*
* This is not in .bss, because we set it sufficiently early that the boot-time
* zeroing of .bss would clobber it.
*/
.pushsection .data..cacheline_aligned
ENTRY(__boot_cpu_mode)
.align L1_CACHE_SHIFT
.long BOOT_CPU_MODE_EL2
.long 0
.popsection
#ifdef CONFIG_SMP
.align 3
1: .quad .
.quad secondary_holding_pen_release
/*
* This provides a "holding pen" for platforms to hold all secondary
* cores are held until we're ready for them to initialise.
*/
ENTRY(secondary_holding_pen)
bl el2_setup // Drop to EL1, w20=cpu_boot_mode
bl __calc_phys_offset // x24=PHYS_OFFSET, x28=PHYS_OFFSET-PAGE_OFFSET
bl set_cpu_boot_mode_flag
mrs x0, mpidr_el1
ldr x1, =MPIDR_HWID_BITMASK
and x0, x0, x1
adr x1, 1b
ldp x2, x3, [x1]
sub x1, x1, x2
add x3, x3, x1
pen: ldr x4, [x3]
cmp x4, x0
b.eq secondary_startup
wfe
b pen
ENDPROC(secondary_holding_pen)
/*
* Secondary entry point that jumps straight into the kernel. Only to
* be used where CPUs are brought online dynamically by the kernel.
*/
ENTRY(secondary_entry)
bl el2_setup // Drop to EL1
bl __calc_phys_offset // x24=PHYS_OFFSET, x28=PHYS_OFFSET-PAGE_OFFSET
bl set_cpu_boot_mode_flag
b secondary_startup
ENDPROC(secondary_entry)
ENTRY(secondary_startup)
/*
* Common entry point for secondary CPUs.
*/
mrs x22, midr_el1 // x22=cpuid
mov x0, x22
bl lookup_processor_type
mov x23, x0 // x23=current cpu_table
cbz x23, __error_p // invalid processor (x23=0)?
pgtbl x25, x26, x28 // x25=TTBR0, x26=TTBR1
ldr x12, [x23, #CPU_INFO_SETUP]
add x12, x12, x28 // __virt_to_phys
blr x12 // initialise processor
ldr x21, =secondary_data
ldr x27, =__secondary_switched // address to jump to after enabling the MMU
b __enable_mmu
ENDPROC(secondary_startup)
ENTRY(__secondary_switched)
ldr x0, [x21] // get secondary_data.stack
mov sp, x0
mov x29, #0
b secondary_start_kernel
ENDPROC(__secondary_switched)
#endif /* CONFIG_SMP */
/*
* Setup common bits before finally enabling the MMU. Essentially this is just
* loading the page table pointer and vector base registers.
*
* On entry to this code, x0 must contain the SCTLR_EL1 value for turning on
* the MMU.
*/
__enable_mmu:
ldr x5, =vectors
msr vbar_el1, x5
msr ttbr0_el1, x25 // load TTBR0
msr ttbr1_el1, x26 // load TTBR1
isb
b __turn_mmu_on
ENDPROC(__enable_mmu)
/*
* Enable the MMU. This completely changes the structure of the visible memory
* space. You will not be able to trace execution through this.
*
* x0 = system control register
* x27 = *virtual* address to jump to upon completion
*
* other registers depend on the function called upon completion
*
* We align the entire function to the smallest power of two larger than it to
* ensure it fits within a single block map entry. Otherwise were PHYS_OFFSET
* close to the end of a 512MB or 1GB block we might require an additional
* table to map the entire function.
*/
.align 4
__turn_mmu_on:
msr sctlr_el1, x0
isb
br x27
ENDPROC(__turn_mmu_on)
/*
* Calculate the start of physical memory.
*/
__calc_phys_offset:
adr x0, 1f
ldp x1, x2, [x0]
sub x28, x0, x1 // x28 = PHYS_OFFSET - PAGE_OFFSET
add x24, x2, x28 // x24 = PHYS_OFFSET
ret
ENDPROC(__calc_phys_offset)
.align 3
1: .quad .
.quad PAGE_OFFSET
/*
* Exception handling. Something went wrong and we can't proceed. We ought to
* tell the user, but since we don't have any guarantee that we're even
@ -715,22 +756,3 @@ __lookup_processor_type_data:
.quad .
.quad cpu_table
.size __lookup_processor_type_data, . - __lookup_processor_type_data
/*
* Determine validity of the x21 FDT pointer.
* The dtb must be 8-byte aligned and live in the first 512M of memory.
*/
__vet_fdt:
tst x21, #0x7
b.ne 1f
cmp x21, x24
b.lt 1f
mov x0, #(1 << 29)
add x0, x0, x24
cmp x21, x0
b.ge 1f
ret
1:
mov x21, #0
ret
ENDPROC(__vet_fdt)

26
arch/arm64/kernel/insn.c
View File

@ -960,3 +960,29 @@ u32 aarch64_insn_gen_logical_shifted_reg(enum aarch64_insn_register dst,
return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_6, insn, shift);
}
bool aarch32_insn_is_wide(u32 insn)
{
return insn >= 0xe800;
}
/*
* Macros/defines for extracting register numbers from instruction.
*/
u32 aarch32_insn_extract_reg_num(u32 insn, int offset)
{
return (insn & (0xf << offset)) >> offset;
}
#define OPC2_MASK 0x7
#define OPC2_OFFSET 5
u32 aarch32_insn_mcr_extract_opc2(u32 insn)
{
return (insn & (OPC2_MASK << OPC2_OFFSET)) >> OPC2_OFFSET;
}
#define CRM_MASK 0xf
u32 aarch32_insn_mcr_extract_crm(u32 insn)
{
return insn & CRM_MASK;
}

72
arch/arm64/kernel/io.c
View File

@ -25,12 +25,26 @@
*/
void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
{
unsigned char *t = to;
while (count) {
count--;
*t = readb(from);
t++;
while (count && (!IS_ALIGNED((unsigned long)from, 8) ||
!IS_ALIGNED((unsigned long)to, 8))) {
*(u8 *)to = __raw_readb(from);
from++;
to++;
count--;
}
while (count >= 8) {
*(u64 *)to = __raw_readq(from);
from += 8;
to += 8;
count -= 8;
}
while (count) {
*(u8 *)to = __raw_readb(from);
from++;
to++;
count--;
}
}
EXPORT_SYMBOL(__memcpy_fromio);
@ -40,12 +54,26 @@ EXPORT_SYMBOL(__memcpy_fromio);
*/
void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
{
const unsigned char *f = from;
while (count) {
count--;
writeb(*f, to);
f++;
while (count && (!IS_ALIGNED((unsigned long)to, 8) ||
!IS_ALIGNED((unsigned long)from, 8))) {
__raw_writeb(*(volatile u8 *)from, to);
from++;
to++;
count--;
}
while (count >= 8) {
__raw_writeq(*(volatile u64 *)from, to);
from += 8;
to += 8;
count -= 8;
}
while (count) {
__raw_writeb(*(volatile u8 *)from, to);
from++;
to++;
count--;
}
}
EXPORT_SYMBOL(__memcpy_toio);
@ -55,10 +83,28 @@ EXPORT_SYMBOL(__memcpy_toio);
*/
void __memset_io(volatile void __iomem *dst, int c, size_t count)
{
while (count) {
count--;
writeb(c, dst);
u64 qc = (u8)c;
qc |= qc << 8;
qc |= qc << 16;
qc |= qc << 32;
while (count && !IS_ALIGNED((unsigned long)dst, 8)) {
__raw_writeb(c, dst);
dst++;
count--;
}
while (count >= 8) {
__raw_writeq(qc, dst);
dst += 8;
count -= 8;
}
while (count) {
__raw_writeb(c, dst);
dst++;
count--;
}
}
EXPORT_SYMBOL(__memset_io);

2
arch/arm64/kernel/irq.c
View File

@ -40,6 +40,8 @@ int arch_show_interrupts(struct seq_file *p, int prec)
return 0;
}
void (*handle_arch_irq)(struct pt_regs *) = NULL;
void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
{
if (handle_arch_irq)

23
arch/arm64/kernel/jump_label.c
View File

@ -22,9 +22,8 @@
#ifdef HAVE_JUMP_LABEL
static void __arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type,
bool is_static)
void arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type)
{
void *addr = (void *)entry->code;
u32 insn;
@ -37,22 +36,18 @@ static void __arch_jump_label_transform(struct jump_entry *entry,
insn = aarch64_insn_gen_nop();
}
if (is_static)
aarch64_insn_patch_text_nosync(addr, insn);
else
aarch64_insn_patch_text(&addr, &insn, 1);
}
void arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type)
{
__arch_jump_label_transform(entry, type, false);
aarch64_insn_patch_text(&addr, &insn, 1);
}
void arch_jump_label_transform_static(struct jump_entry *entry,
enum jump_label_type type)
{
__arch_jump_label_transform(entry, type, true);
/*
* We use the architected A64 NOP in arch_static_branch, so there's no
* need to patch an identical A64 NOP over the top of it here. The core
* will call arch_jump_label_transform from a module notifier if the
* NOP needs to be replaced by a branch.
*/
}
#endif /* HAVE_JUMP_LABEL */

18
arch/arm64/kernel/module.c
View File

@ -26,6 +26,7 @@
#include <linux/moduleloader.h>
#include <linux/vmalloc.h>
#include <asm/insn.h>
#include <asm/sections.h>
#define AARCH64_INSN_IMM_MOVNZ AARCH64_INSN_IMM_MAX
#define AARCH64_INSN_IMM_MOVK AARCH64_INSN_IMM_16
@ -394,3 +395,20 @@ overflow:
me->name, (int)ELF64_R_TYPE(rel[i].r_info), val);
return -ENOEXEC;
}
int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)
{
const Elf_Shdr *s, *se;
const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++) {
if (strcmp(".altinstructions", secstrs + s->sh_name) == 0) {
apply_alternatives((void *)s->sh_addr, s->sh_size);
return 0;
}
}
return 0;
}

10
arch/arm64/kernel/perf_event.c
View File

@ -169,8 +169,14 @@ armpmu_event_set_period(struct perf_event *event,
ret = 1;
}
if (left > (s64)armpmu->max_period)
left = armpmu->max_period;
/*
* Limit the maximum period to prevent the counter value
* from overtaking the one we are about to program. In
* effect we are reducing max_period to account for
* interrupt latency (and we are being very conservative).
*/
if (left > (armpmu->max_period >> 1))
left = armpmu->max_period >> 1;
local64_set(&hwc->prev_count, (u64)-left);

40
arch/arm64/kernel/ptrace.c
View File

@ -27,6 +27,7 @@
#include <linux/smp.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/seccomp.h>
#include <linux/security.h>
#include <linux/init.h>
#include <linux/signal.h>
@ -551,6 +552,32 @@ static int tls_set(struct task_struct *target, const struct user_regset *regset,
return ret;
}
static int system_call_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
int syscallno = task_pt_regs(target)->syscallno;
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&syscallno, 0, -1);
}
static int system_call_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
int syscallno, ret;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &syscallno, 0, -1);
if (ret)
return ret;
task_pt_regs(target)->syscallno = syscallno;
return ret;
}
enum aarch64_regset {
REGSET_GPR,
REGSET_FPR,
@ -559,6 +586,7 @@ enum aarch64_regset {
REGSET_HW_BREAK,
REGSET_HW_WATCH,
#endif
REGSET_SYSTEM_CALL,
};
static const struct user_regset aarch64_regsets[] = {
@ -608,6 +636,14 @@ static const struct user_regset aarch64_regsets[] = {
.set = hw_break_set,
},
#endif
[REGSET_SYSTEM_CALL] = {
.core_note_type = NT_ARM_SYSTEM_CALL,
.n = 1,
.size = sizeof(int),
.align = sizeof(int),
.get = system_call_get,
.set = system_call_set,
},
};
static const struct user_regset_view user_aarch64_view = {
@ -1114,6 +1150,10 @@ static void tracehook_report_syscall(struct pt_regs *regs,
asmlinkage int syscall_trace_enter(struct pt_regs *regs)
{
/* Do the secure computing check first; failures should be fast. */
if (secure_computing() == -1)
return -1;
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall(regs, PTRACE_SYSCALL_ENTER);

108
arch/arm64/kernel/setup.c
View File

@ -43,12 +43,14 @@
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <linux/efi.h>
#include <linux/personality.h>
#include <asm/fixmap.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
#include <asm/elf.h>
#include <asm/cputable.h>
#include <asm/cpufeature.h>
#include <asm/cpu_ops.h>
#include <asm/sections.h>
#include <asm/setup.h>
@ -72,13 +74,15 @@ EXPORT_SYMBOL_GPL(elf_hwcap);
COMPAT_HWCAP_FAST_MULT|COMPAT_HWCAP_EDSP|\
COMPAT_HWCAP_TLS|COMPAT_HWCAP_VFP|\
COMPAT_HWCAP_VFPv3|COMPAT_HWCAP_VFPv4|\
COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV)
COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV|\
COMPAT_HWCAP_LPAE)
unsigned int compat_elf_hwcap __read_mostly = COMPAT_ELF_HWCAP_DEFAULT;
unsigned int compat_elf_hwcap2 __read_mostly;
#endif
DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
static const char *cpu_name;
static const char *machine_name;
phys_addr_t __fdt_pointer __initdata;
/*
@ -116,12 +120,16 @@ void __init early_print(const char *str, ...)
void __init smp_setup_processor_id(void)
{
u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
cpu_logical_map(0) = mpidr;
/*
* clear __my_cpu_offset on boot CPU to avoid hang caused by
* using percpu variable early, for example, lockdep will
* access percpu variable inside lock_release
*/
set_my_cpu_offset(0);
pr_info("Booting Linux on physical CPU 0x%lx\n", (unsigned long)mpidr);
}
bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
@ -311,7 +319,7 @@ static void __init setup_machine_fdt(phys_addr_t dt_phys)
cpu_relax();
}
machine_name = of_flat_dt_get_machine_name();
dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name());
}
/*
@ -376,6 +384,7 @@ void __init setup_arch(char **cmdline_p)
*cmdline_p = boot_command_line;
early_fixmap_init();
early_ioremap_init();
parse_early_param();
@ -398,7 +407,6 @@ void __init setup_arch(char **cmdline_p)
psci_init();
cpu_logical_map(0) = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
cpu_read_bootcpu_ops();
#ifdef CONFIG_SMP
smp_init_cpus();
@ -447,14 +455,50 @@ static const char *hwcap_str[] = {
NULL
};
#ifdef CONFIG_COMPAT
static const char *compat_hwcap_str[] = {
"swp",
"half",
"thumb",
"26bit",
"fastmult",
"fpa",
"vfp",
"edsp",
"java",
"iwmmxt",
"crunch",
"thumbee",
"neon",
"vfpv3",
"vfpv3d16",
"tls",
"vfpv4",
"idiva",
"idivt",
"vfpd32",
"lpae",
"evtstrm"
};
static const char *compat_hwcap2_str[] = {
"aes",
"pmull",
"sha1",
"sha2",
"crc32",
NULL
};
#endif /* CONFIG_COMPAT */
static int c_show(struct seq_file *m, void *v)
{
int i;
seq_printf(m, "Processor\t: %s rev %d (%s)\n",
cpu_name, read_cpuid_id() & 15, ELF_PLATFORM);
int i, j;
for_each_online_cpu(i) {
struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
u32 midr = cpuinfo->reg_midr;
/*
* glibc reads /proc/cpuinfo to determine the number of
* online processors, looking for lines beginning with
@ -463,25 +507,39 @@ static int c_show(struct seq_file *m, void *v)
#ifdef CONFIG_SMP
seq_printf(m, "processor\t: %d\n", i);
#endif
/*
* Dump out the common processor features in a single line.
* Userspace should read the hwcaps with getauxval(AT_HWCAP)
* rather than attempting to parse this, but there's a body of
* software which does already (at least for 32-bit).
*/
seq_puts(m, "Features\t:");
if (personality(current->personality) == PER_LINUX32) {
#ifdef CONFIG_COMPAT
for (j = 0; compat_hwcap_str[j]; j++)
if (compat_elf_hwcap & (1 << j))
seq_printf(m, " %s", compat_hwcap_str[j]);
for (j = 0; compat_hwcap2_str[j]; j++)
if (compat_elf_hwcap2 & (1 << j))
seq_printf(m, " %s", compat_hwcap2_str[j]);
#endif /* CONFIG_COMPAT */
} else {
for (j = 0; hwcap_str[j]; j++)
if (elf_hwcap & (1 << j))
seq_printf(m, " %s", hwcap_str[j]);
}
seq_puts(m, "\n");
seq_printf(m, "CPU implementer\t: 0x%02x\n",
MIDR_IMPLEMENTOR(midr));
seq_printf(m, "CPU architecture: 8\n");
seq_printf(m, "CPU variant\t: 0x%x\n", MIDR_VARIANT(midr));
seq_printf(m, "CPU part\t: 0x%03x\n", MIDR_PARTNUM(midr));
seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr));
}
/* dump out the processor features */
seq_puts(m, "Features\t: ");
for (i = 0; hwcap_str[i]; i++)
if (elf_hwcap & (1 << i))
seq_printf(m, "%s ", hwcap_str[i]);
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
seq_printf(m, "CPU architecture: AArch64\n");
seq_printf(m, "CPU variant\t: 0x%x\n", (read_cpuid_id() >> 20) & 15);
seq_printf(m, "CPU part\t: 0x%03x\n", (read_cpuid_id() >> 4) & 0xfff);
seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
seq_puts(m, "\n");
seq_printf(m, "Hardware\t: %s\n", machine_name);
return 0;
}

6
arch/arm64/kernel/signal32.c
View File

@ -186,6 +186,12 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
err |= __put_user(from->si_uid, &to->si_uid);
err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr);
break;
case __SI_SYS:
err |= __put_user((compat_uptr_t)(unsigned long)
from->si_call_addr, &to->si_call_addr);
err |= __put_user(from->si_syscall, &to->si_syscall);
err |= __put_user(from->si_arch, &to->si_arch);
break;
default: /* this is just in case for now ... */
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);

36
arch/arm64/kernel/sleep.S
View File

@ -147,14 +147,12 @@ cpu_resume_after_mmu:
ret
ENDPROC(cpu_resume_after_mmu)
.data
ENTRY(cpu_resume)
bl el2_setup // if in EL2 drop to EL1 cleanly
#ifdef CONFIG_SMP
mrs x1, mpidr_el1
adr x4, mpidr_hash_ptr
ldr x5, [x4]
add x8, x4, x5 // x8 = struct mpidr_hash phys address
adrp x8, mpidr_hash
add x8, x8, #:lo12:mpidr_hash // x8 = struct mpidr_hash phys address
/* retrieve mpidr_hash members to compute the hash */
ldr x2, [x8, #MPIDR_HASH_MASK]
ldp w3, w4, [x8, #MPIDR_HASH_SHIFTS]
@ -164,14 +162,15 @@ ENTRY(cpu_resume)
#else
mov x7, xzr
#endif
adr x0, sleep_save_sp
adrp x0, sleep_save_sp
add x0, x0, #:lo12:sleep_save_sp
ldr x0, [x0, #SLEEP_SAVE_SP_PHYS]
ldr x0, [x0, x7, lsl #3]
/* load sp from context */
ldr x2, [x0, #CPU_CTX_SP]
adr x1, sleep_idmap_phys
adrp x1, sleep_idmap_phys
/* load physical address of identity map page table in x1 */
ldr x1, [x1]
ldr x1, [x1, #:lo12:sleep_idmap_phys]
mov sp, x2
/*
* cpu_do_resume expects x0 to contain context physical address
@ -180,26 +179,3 @@ ENTRY(cpu_resume)
bl cpu_do_resume // PC relative jump, MMU off
b cpu_resume_mmu // Resume MMU, never returns
ENDPROC(cpu_resume)
.align 3
mpidr_hash_ptr:
/*
* offset of mpidr_hash symbol from current location
* used to obtain run-time mpidr_hash address with MMU off
*/
.quad mpidr_hash - .
/*
* physical address of identity mapped page tables
*/
.type sleep_idmap_phys, #object
ENTRY(sleep_idmap_phys)
.quad 0
/*
* struct sleep_save_sp {
* phys_addr_t *save_ptr_stash;
* phys_addr_t save_ptr_stash_phys;
* };
*/
.type sleep_save_sp, #object
ENTRY(sleep_save_sp)
.space SLEEP_SAVE_SP_SZ // struct sleep_save_sp

2
arch/arm64/kernel/smp.c
View File

@ -37,6 +37,7 @@
#include <linux/of.h>
#include <linux/irq_work.h>
#include <asm/alternative.h>
#include <asm/atomic.h>
#include <asm/cacheflush.h>
#include <asm/cpu.h>
@ -309,6 +310,7 @@ void cpu_die(void)
void __init smp_cpus_done(unsigned int max_cpus)
{
pr_info("SMP: Total of %d processors activated.\n", num_online_cpus());
apply_alternatives_all();
}
void __init smp_prepare_boot_cpu(void)

4
arch/arm64/kernel/suspend.c
View File

@ -126,8 +126,8 @@ int __cpu_suspend(unsigned long arg, int (*fn)(unsigned long))
return ret;
}
extern struct sleep_save_sp sleep_save_sp;
extern phys_addr_t sleep_idmap_phys;
struct sleep_save_sp sleep_save_sp;
phys_addr_t sleep_idmap_phys;
static int __init cpu_suspend_init(void)
{

49
arch/arm64/kernel/sys_compat.c
View File

@ -28,29 +28,39 @@
#include <asm/cacheflush.h>
#include <asm/unistd.h>
static inline void
do_compat_cache_op(unsigned long start, unsigned long end, int flags)
static long
__do_compat_cache_op(unsigned long start, unsigned long end)
{
struct mm_struct *mm = current->active_mm;
struct vm_area_struct *vma;
long ret;
if (end < start || flags)
return;
do {
unsigned long chunk = min(PAGE_SIZE, end - start);
down_read(&mm->mmap_sem);
vma = find_vma(mm, start);
if (vma && vma->vm_start < end) {
if (start < vma->vm_start)
start = vma->vm_start;
if (end > vma->vm_end)
end = vma->vm_end;
up_read(&mm->mmap_sem);
__flush_cache_user_range(start & PAGE_MASK, PAGE_ALIGN(end));
return;
}
up_read(&mm->mmap_sem);
if (fatal_signal_pending(current))
return 0;
ret = __flush_cache_user_range(start, start + chunk);
if (ret)
return ret;
cond_resched();
start += chunk;
} while (start < end);
return 0;
}
static inline long
do_compat_cache_op(unsigned long start, unsigned long end, int flags)
{
if (end < start || flags)
return -EINVAL;
if (!access_ok(VERIFY_READ, start, end - start))
return -EFAULT;
return __do_compat_cache_op(start, end);
}
/*
* Handle all unrecognised system calls.
*/
@ -74,8 +84,7 @@ long compat_arm_syscall(struct pt_regs *regs)
* the specified region).
*/
case __ARM_NR_compat_cacheflush:
do_compat_cache_op(regs->regs[0], regs->regs[1], regs->regs[2]);
return 0;
return do_compat_cache_op(regs->regs[0], regs->regs[1], regs->regs[2]);
case __ARM_NR_compat_set_tls:
current->thread.tp_value = regs->regs[0];

7
arch/arm64/kernel/topology.c
View File

@ -255,12 +255,15 @@ void store_cpu_topology(unsigned int cpuid)
/* Multiprocessor system : Multi-threads per core */
cpuid_topo->thread_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
cpuid_topo->cluster_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
cpuid_topo->cluster_id = MPIDR_AFFINITY_LEVEL(mpidr, 2) |
MPIDR_AFFINITY_LEVEL(mpidr, 3) << 8;
} else {
/* Multiprocessor system : Single-thread per core */
cpuid_topo->thread_id = -1;
cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cpuid_topo->cluster_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
cpuid_topo->cluster_id = MPIDR_AFFINITY_LEVEL(mpidr, 1) |
MPIDR_AFFINITY_LEVEL(mpidr, 2) << 8 |
MPIDR_AFFINITY_LEVEL(mpidr, 3) << 16;
}
pr_debug("CPU%u: cluster %d core %d thread %d mpidr %#016llx\n",

35
arch/arm64/kernel/trace-events-emulation.h Normal file
View File

@ -0,0 +1,35 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM emulation
#if !defined(_TRACE_EMULATION_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_EMULATION_H
#include <linux/tracepoint.h>
TRACE_EVENT(instruction_emulation,
TP_PROTO(const char *instr, u64 addr),
TP_ARGS(instr, addr),
TP_STRUCT__entry(
__string(instr, instr)
__field(u64, addr)
),
TP_fast_assign(
__assign_str(instr, instr);
__entry->addr = addr;
),
TP_printk("instr=\"%s\" addr=0x%llx", __get_str(instr), __entry->addr)
);
#endif /* _TRACE_EMULATION_H */
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace-events-emulation
#include <trace/define_trace.h>

66
arch/arm64/kernel/traps.c
View File

@ -259,6 +259,69 @@ void arm64_notify_die(const char *str, struct pt_regs *regs,
}
}
static LIST_HEAD(undef_hook);
static DEFINE_RAW_SPINLOCK(undef_lock);
void register_undef_hook(struct undef_hook *hook)
{
unsigned long flags;
raw_spin_lock_irqsave(&undef_lock, flags);
list_add(&hook->node, &undef_hook);
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
void unregister_undef_hook(struct undef_hook *hook)
{
unsigned long flags;
raw_spin_lock_irqsave(&undef_lock, flags);
list_del(&hook->node);
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
static int call_undef_hook(struct pt_regs *regs)
{
struct undef_hook *hook;
unsigned long flags;
u32 instr;
int (*fn)(struct pt_regs *regs, u32 instr) = NULL;
void __user *pc = (void __user *)instruction_pointer(regs);
if (!user_mode(regs))
return 1;
if (compat_thumb_mode(regs)) {
/* 16-bit Thumb instruction */
if (get_user(instr, (u16 __user *)pc))
goto exit;
instr = le16_to_cpu(instr);
if (aarch32_insn_is_wide(instr)) {
u32 instr2;
if (get_user(instr2, (u16 __user *)(pc + 2)))
goto exit;
instr2 = le16_to_cpu(instr2);
instr = (instr << 16) | instr2;
}
} else {
/* 32-bit ARM instruction */
if (get_user(instr, (u32 __user *)pc))
goto exit;
instr = le32_to_cpu(instr);
}
raw_spin_lock_irqsave(&undef_lock, flags);
list_for_each_entry(hook, &undef_hook, node)
if ((instr & hook->instr_mask) == hook->instr_val &&
(regs->pstate & hook->pstate_mask) == hook->pstate_val)
fn = hook->fn;
raw_spin_unlock_irqrestore(&undef_lock, flags);
exit:
return fn ? fn(regs, instr) : 1;
}
asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
{
siginfo_t info;
@ -268,6 +331,9 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
if (!aarch32_break_handler(regs))
return;
if (call_undef_hook(regs) == 0)
return;
if (show_unhandled_signals && unhandled_signal(current, SIGILL) &&
printk_ratelimit()) {
pr_info("%s[%d]: undefined instruction: pc=%p\n",

33
arch/arm64/kernel/vmlinux.lds.S
View File

@ -11,8 +11,9 @@
#include "image.h"
#define ARM_EXIT_KEEP(x)
#define ARM_EXIT_DISCARD(x) x
/* .exit.text needed in case of alternative patching */
#define ARM_EXIT_KEEP(x) x
#define ARM_EXIT_DISCARD(x)
OUTPUT_ARCH(aarch64)
ENTRY(_text)
@ -32,6 +33,22 @@ jiffies = jiffies_64;
*(.hyp.text) \
VMLINUX_SYMBOL(__hyp_text_end) = .;
/*
* The size of the PE/COFF section that covers the kernel image, which
* runs from stext to _edata, must be a round multiple of the PE/COFF
* FileAlignment, which we set to its minimum value of 0x200. 'stext'
* itself is 4 KB aligned, so padding out _edata to a 0x200 aligned
* boundary should be sufficient.
*/
PECOFF_FILE_ALIGNMENT = 0x200;
#ifdef CONFIG_EFI
#define PECOFF_EDATA_PADDING \
.pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); }
#else
#define PECOFF_EDATA_PADDING
#endif
SECTIONS
{
/*
@ -100,9 +117,21 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__init_end = .;
. = ALIGN(4);
.altinstructions : {
__alt_instructions = .;
*(.altinstructions)
__alt_instructions_end = .;
}
.altinstr_replacement : {
*(.altinstr_replacement)
}
. = ALIGN(PAGE_SIZE);
_data = .;
_sdata = .;
RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE)
PECOFF_EDATA_PADDING
_edata = .;
BSS_SECTION(0, 0, 0)

4
arch/arm64/kvm/hyp.S
View File

@ -761,10 +761,10 @@
.macro activate_traps
ldr x2, [x0, #VCPU_HCR_EL2]
msr hcr_el2, x2
ldr x2, =(CPTR_EL2_TTA)
mov x2, #CPTR_EL2_TTA
msr cptr_el2, x2
ldr x2, =(1 << 15) // Trap CP15 Cr=15
mov x2, #(1 << 15) // Trap CP15 Cr=15
msr hstr_el2, x2
mrs x2, mdcr_el2

1
arch/arm64/mm/Makefile
View File

@ -3,3 +3,4 @@ obj-y := dma-mapping.o extable.o fault.o init.o \
ioremap.o mmap.o pgd.o mmu.o \
context.o proc.o pageattr.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_ARM64_PTDUMP) += dump.o

10
arch/arm64/mm/cache.S
View File

@ -17,9 +17,12 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/errno.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
#include <asm/cpufeature.h>
#include <asm/alternative-asm.h>
#include "proc-macros.S"
@ -138,9 +141,12 @@ USER(9f, ic ivau, x4 ) // invalidate I line PoU
add x4, x4, x2
cmp x4, x1
b.lo 1b
9: // ignore any faulting cache operation
dsb ish
isb
mov x0, #0
ret
9:
mov x0, #-EFAULT
ret
ENDPROC(flush_icache_range)
ENDPROC(__flush_cache_user_range)
@ -210,7 +216,7 @@ __dma_clean_range:
dcache_line_size x2, x3
sub x3, x2, #1
bic x0, x0, x3
1: dc cvac, x0 // clean D / U line
1: alternative_insn "dc cvac, x0", "dc civac, x0", ARM64_WORKAROUND_CLEAN_CACHE
add x0, x0, x2
cmp x0, x1
b.lo 1b

332
arch/arm64/mm/dump.c Normal file
View File

@ -0,0 +1,332 @@
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
* Debug helper to dump the current kernel pagetables of the system
* so that we can see what the various memory ranges are set to.
*
* Derived from x86 and arm implementation:
* (C) Copyright 2008 Intel Corporation
*
* Author: Arjan van de Ven <arjan@linux.intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2
* of the License.
*/
#include <linux/debugfs.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <asm/fixmap.h>
#include <asm/pgtable.h>
#define LOWEST_ADDR (UL(0xffffffffffffffff) << VA_BITS)
struct addr_marker {
unsigned long start_address;
const char *name;
};
enum address_markers_idx {
VMALLOC_START_NR = 0,
VMALLOC_END_NR,
#ifdef CONFIG_SPARSEMEM_VMEMMAP
VMEMMAP_START_NR,
VMEMMAP_END_NR,
#endif
PCI_START_NR,
PCI_END_NR,
FIXADDR_START_NR,
FIXADDR_END_NR,
MODULES_START_NR,
MODUELS_END_NR,
KERNEL_SPACE_NR,
};
static struct addr_marker address_markers[] = {
{ VMALLOC_START, "vmalloc() Area" },
{ VMALLOC_END, "vmalloc() End" },
#ifdef CONFIG_SPARSEMEM_VMEMMAP
{ 0, "vmemmap start" },
{ 0, "vmemmap end" },
#endif
{ (unsigned long) PCI_IOBASE, "PCI I/O start" },
{ (unsigned long) PCI_IOBASE + SZ_16M, "PCI I/O end" },
{ FIXADDR_START, "Fixmap start" },
{ FIXADDR_TOP, "Fixmap end" },
{ MODULES_VADDR, "Modules start" },
{ MODULES_END, "Modules end" },
{ PAGE_OFFSET, "Kernel Mapping" },
{ -1, NULL },
};
struct pg_state {
struct seq_file *seq;
const struct addr_marker *marker;
unsigned long start_address;
unsigned level;
u64 current_prot;
};
struct prot_bits {
u64 mask;
u64 val;
const char *set;
const char *clear;
};
static const struct prot_bits pte_bits[] = {
{
.mask = PTE_USER,
.val = PTE_USER,
.set = "USR",
.clear = " ",
}, {
.mask = PTE_RDONLY,
.val = PTE_RDONLY,
.set = "ro",
.clear = "RW",
}, {
.mask = PTE_PXN,
.val = PTE_PXN,
.set = "NX",
.clear = "x ",
}, {
.mask = PTE_SHARED,
.val = PTE_SHARED,
.set = "SHD",
.clear = " ",
}, {
.mask = PTE_AF,
.val = PTE_AF,
.set = "AF",
.clear = " ",
}, {
.mask = PTE_NG,
.val = PTE_NG,
.set = "NG",
.clear = " ",
}, {
.mask = PTE_UXN,
.val = PTE_UXN,
.set = "UXN",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_DEVICE_nGnRnE),
.set = "DEVICE/nGnRnE",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_DEVICE_nGnRE),
.set = "DEVICE/nGnRE",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_DEVICE_GRE),
.set = "DEVICE/GRE",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_NORMAL_NC),
.set = "MEM/NORMAL-NC",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_NORMAL),
.set = "MEM/NORMAL",
}
};
struct pg_level {
const struct prot_bits *bits;
size_t num;
u64 mask;
};
static struct pg_level pg_level[] = {
{
}, { /* pgd */
.bits = pte_bits,
.num = ARRAY_SIZE(pte_bits),
}, { /* pud */
.bits = pte_bits,
.num = ARRAY_SIZE(pte_bits),
}, { /* pmd */
.bits = pte_bits,
.num = ARRAY_SIZE(pte_bits),
}, { /* pte */
.bits = pte_bits,
.num = ARRAY_SIZE(pte_bits),
},
};
static void dump_prot(struct pg_state *st, const struct prot_bits *bits,
size_t num)
{
unsigned i;
for (i = 0; i < num; i++, bits++) {
const char *s;
if ((st->current_prot & bits->mask) == bits->val)
s = bits->set;
else
s = bits->clear;
if (s)
seq_printf(st->seq, " %s", s);
}
}
static void note_page(struct pg_state *st, unsigned long addr, unsigned level,
u64 val)
{
static const char units[] = "KMGTPE";
u64 prot = val & pg_level[level].mask;
if (addr < LOWEST_ADDR)
return;
if (!st->level) {
st->level = level;
st->current_prot = prot;
st->start_address = addr;
seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
} else if (prot != st->current_prot || level != st->level ||
addr >= st->marker[1].start_address) {
const char *unit = units;
unsigned long delta;
if (st->current_prot) {
seq_printf(st->seq, "0x%16lx-0x%16lx ",
st->start_address, addr);
delta = (addr - st->start_address) >> 10;
while (!(delta & 1023) && unit[1]) {
delta >>= 10;
unit++;
}
seq_printf(st->seq, "%9lu%c", delta, *unit);
if (pg_level[st->level].bits)
dump_prot(st, pg_level[st->level].bits,
pg_level[st->level].num);
seq_puts(st->seq, "\n");
}
if (addr >= st->marker[1].start_address) {
st->marker++;
seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
}
st->start_address = addr;
st->current_prot = prot;
st->level = level;
}
if (addr >= st->marker[1].start_address) {
st->marker++;
seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
}
}
static void walk_pte(struct pg_state *st, pmd_t *pmd, unsigned long start)
{
pte_t *pte = pte_offset_kernel(pmd, 0);
unsigned long addr;
unsigned i;
for (i = 0; i < PTRS_PER_PTE; i++, pte++) {
addr = start + i * PAGE_SIZE;
note_page(st, addr, 4, pte_val(*pte));
}
}
static void walk_pmd(struct pg_state *st, pud_t *pud, unsigned long start)
{
pmd_t *pmd = pmd_offset(pud, 0);
unsigned long addr;
unsigned i;
for (i = 0; i < PTRS_PER_PMD; i++, pmd++) {
addr = start + i * PMD_SIZE;
if (pmd_none(*pmd) || pmd_sect(*pmd) || pmd_bad(*pmd))
note_page(st, addr, 3, pmd_val(*pmd));
else
walk_pte(st, pmd, addr);
}
}
static void walk_pud(struct pg_state *st, pgd_t *pgd, unsigned long start)
{
pud_t *pud = pud_offset(pgd, 0);
unsigned long addr;
unsigned i;
for (i = 0; i < PTRS_PER_PUD; i++, pud++) {
addr = start + i * PUD_SIZE;
if (pud_none(*pud) || pud_sect(*pud) || pud_bad(*pud))
note_page(st, addr, 2, pud_val(*pud));
else
walk_pmd(st, pud, addr);
}
}
static void walk_pgd(struct pg_state *st, struct mm_struct *mm, unsigned long start)
{
pgd_t *pgd = pgd_offset(mm, 0);
unsigned i;
unsigned long addr;
for (i = 0; i < PTRS_PER_PGD; i++, pgd++) {
addr = start + i * PGDIR_SIZE;
if (pgd_none(*pgd) || pgd_bad(*pgd))
note_page(st, addr, 1, pgd_val(*pgd));
else
walk_pud(st, pgd, addr);
}
}
static int ptdump_show(struct seq_file *m, void *v)
{
struct pg_state st = {
.seq = m,
.marker = address_markers,
};
walk_pgd(&st, &init_mm, LOWEST_ADDR);
note_page(&st, 0, 0, 0);
return 0;
}
static int ptdump_open(struct inode *inode, struct file *file)
{
return single_open(file, ptdump_show, NULL);
}
static const struct file_operations ptdump_fops = {
.open = ptdump_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ptdump_init(void)
{
struct dentry *pe;
unsigned i, j;
for (i = 0; i < ARRAY_SIZE(pg_level); i++)
if (pg_level[i].bits)
for (j = 0; j < pg_level[i].num; j++)
pg_level[i].mask |= pg_level[i].bits[j].mask;
address_markers[VMEMMAP_START_NR].start_address =
(unsigned long)virt_to_page(PAGE_OFFSET);
address_markers[VMEMMAP_END_NR].start_address =
(unsigned long)virt_to_page(high_memory);
pe = debugfs_create_file("kernel_page_tables", 0400, NULL, NULL,
&ptdump_fops);
return pe ? 0 : -ENOMEM;
}
device_initcall(ptdump_init);

2
arch/arm64/mm/fault.c
View File

@ -380,7 +380,7 @@ static struct fault_info {
{ do_bad, SIGBUS, 0, "level 1 address size fault" },
{ do_bad, SIGBUS, 0, "level 2 address size fault" },
{ do_bad, SIGBUS, 0, "level 3 address size fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "input address range fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 0 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 1 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 2 translation fault" },
{ do_page_fault, SIGSEGV, SEGV_MAPERR, "level 3 translation fault" },

2
arch/arm64/mm/init.c
View File

@ -39,6 +39,7 @@
#include <asm/setup.h>
#include <asm/sizes.h>
#include <asm/tlb.h>
#include <asm/alternative.h>
#include "mm.h"
@ -325,6 +326,7 @@ void __init mem_init(void)
void free_initmem(void)
{
free_initmem_default(0);
free_alternatives_memory();
}
#ifdef CONFIG_BLK_DEV_INITRD

93
arch/arm64/mm/ioremap.c
View File

@ -103,97 +103,10 @@ void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size)
}
EXPORT_SYMBOL(ioremap_cache);
static pte_t bm_pte[PTRS_PER_PTE] __page_aligned_bss;
#if CONFIG_ARM64_PGTABLE_LEVELS > 2
static pmd_t bm_pmd[PTRS_PER_PMD] __page_aligned_bss;
#endif
#if CONFIG_ARM64_PGTABLE_LEVELS > 3
static pud_t bm_pud[PTRS_PER_PUD] __page_aligned_bss;
#endif
static inline pud_t * __init early_ioremap_pud(unsigned long addr)
{
pgd_t *pgd;
pgd = pgd_offset_k(addr);
BUG_ON(pgd_none(*pgd) || pgd_bad(*pgd));
return pud_offset(pgd, addr);
}
static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
{
pud_t *pud = early_ioremap_pud(addr);
BUG_ON(pud_none(*pud) || pud_bad(*pud));
return pmd_offset(pud, addr);
}
static inline pte_t * __init early_ioremap_pte(unsigned long addr)
{
pmd_t *pmd = early_ioremap_pmd(addr);
BUG_ON(pmd_none(*pmd) || pmd_bad(*pmd));
return pte_offset_kernel(pmd, addr);
}
/*
* Must be called after early_fixmap_init
*/
void __init early_ioremap_init(void)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
unsigned long addr = fix_to_virt(FIX_BTMAP_BEGIN);
pgd = pgd_offset_k(addr);
pgd_populate(&init_mm, pgd, bm_pud);
pud = pud_offset(pgd, addr);
pud_populate(&init_mm, pud, bm_pmd);
pmd = pmd_offset(pud, addr);
pmd_populate_kernel(&init_mm, pmd, bm_pte);
/*
* The boot-ioremap range spans multiple pmds, for which
* we are not prepared:
*/
BUILD_BUG_ON((__fix_to_virt(FIX_BTMAP_BEGIN) >> PMD_SHIFT)
!= (__fix_to_virt(FIX_BTMAP_END) >> PMD_SHIFT));
if (pmd != early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END))) {
WARN_ON(1);
pr_warn("pmd %p != %p\n",
pmd, early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END)));
pr_warn("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
fix_to_virt(FIX_BTMAP_BEGIN));
pr_warn("fix_to_virt(FIX_BTMAP_END): %08lx\n",
fix_to_virt(FIX_BTMAP_END));
pr_warn("FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
pr_warn("FIX_BTMAP_BEGIN: %d\n",
FIX_BTMAP_BEGIN);
}
early_ioremap_setup();
}
void __init __early_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
{
unsigned long addr = __fix_to_virt(idx);
pte_t *pte;
if (idx >= __end_of_fixed_addresses) {
BUG();
return;
}
pte = early_ioremap_pte(addr);
if (pgprot_val(flags))
set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
else {
pte_clear(&init_mm, addr, pte);
flush_tlb_kernel_range(addr, addr+PAGE_SIZE);
}
}

1
arch/arm64/mm/mm.h
View File

@ -1,2 +1 @@
extern void __init bootmem_init(void);
extern void __init arm64_swiotlb_init(void);

12
arch/arm64/mm/mmap.c
View File

@ -47,22 +47,14 @@ static int mmap_is_legacy(void)
return sysctl_legacy_va_layout;
}
/*
* Since get_random_int() returns the same value within a 1 jiffy window, we
* will almost always get the same randomisation for the stack and mmap
* region. This will mean the relative distance between stack and mmap will be
* the same.
*
* To avoid this we can shift the randomness by 1 bit.
*/
static unsigned long mmap_rnd(void)
{
unsigned long rnd = 0;
if (current->flags & PF_RANDOMIZE)
rnd = (long)get_random_int() & (STACK_RND_MASK >> 1);
rnd = (long)get_random_int() & STACK_RND_MASK;
return rnd << (PAGE_SHIFT + 1);
return rnd << PAGE_SHIFT;
}
static unsigned long mmap_base(void)

94
arch/arm64/mm/mmu.c
View File

@ -28,6 +28,7 @@
#include <linux/io.h>
#include <asm/cputype.h>
#include <asm/fixmap.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/sizes.h>
@ -463,3 +464,96 @@ void vmemmap_free(unsigned long start, unsigned long end)
{
}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
static pte_t bm_pte[PTRS_PER_PTE] __page_aligned_bss;
#if CONFIG_ARM64_PGTABLE_LEVELS > 2
static pmd_t bm_pmd[PTRS_PER_PMD] __page_aligned_bss;
#endif
#if CONFIG_ARM64_PGTABLE_LEVELS > 3
static pud_t bm_pud[PTRS_PER_PUD] __page_aligned_bss;
#endif
static inline pud_t * fixmap_pud(unsigned long addr)
{
pgd_t *pgd = pgd_offset_k(addr);
BUG_ON(pgd_none(*pgd) || pgd_bad(*pgd));
return pud_offset(pgd, addr);
}
static inline pmd_t * fixmap_pmd(unsigned long addr)
{
pud_t *pud = fixmap_pud(addr);
BUG_ON(pud_none(*pud) || pud_bad(*pud));
return pmd_offset(pud, addr);
}
static inline pte_t * fixmap_pte(unsigned long addr)
{
pmd_t *pmd = fixmap_pmd(addr);
BUG_ON(pmd_none(*pmd) || pmd_bad(*pmd));
return pte_offset_kernel(pmd, addr);
}
void __init early_fixmap_init(void)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
unsigned long addr = FIXADDR_START;
pgd = pgd_offset_k(addr);
pgd_populate(&init_mm, pgd, bm_pud);
pud = pud_offset(pgd, addr);
pud_populate(&init_mm, pud, bm_pmd);
pmd = pmd_offset(pud, addr);
pmd_populate_kernel(&init_mm, pmd, bm_pte);
/*
* The boot-ioremap range spans multiple pmds, for which
* we are not preparted:
*/
BUILD_BUG_ON((__fix_to_virt(FIX_BTMAP_BEGIN) >> PMD_SHIFT)
!= (__fix_to_virt(FIX_BTMAP_END) >> PMD_SHIFT));
if ((pmd != fixmap_pmd(fix_to_virt(FIX_BTMAP_BEGIN)))
|| pmd != fixmap_pmd(fix_to_virt(FIX_BTMAP_END))) {
WARN_ON(1);
pr_warn("pmd %p != %p, %p\n",
pmd, fixmap_pmd(fix_to_virt(FIX_BTMAP_BEGIN)),
fixmap_pmd(fix_to_virt(FIX_BTMAP_END)));
pr_warn("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
fix_to_virt(FIX_BTMAP_BEGIN));
pr_warn("fix_to_virt(FIX_BTMAP_END): %08lx\n",
fix_to_virt(FIX_BTMAP_END));
pr_warn("FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
pr_warn("FIX_BTMAP_BEGIN: %d\n", FIX_BTMAP_BEGIN);
}
}
void __set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
{
unsigned long addr = __fix_to_virt(idx);
pte_t *pte;
if (idx >= __end_of_fixed_addresses) {
BUG();
return;
}
pte = fixmap_pte(addr);
if (pgprot_val(flags)) {
set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
} else {
pte_clear(&init_mm, addr, pte);
flush_tlb_kernel_range(addr, addr+PAGE_SIZE);
}
}

4
arch/arm64/mm/pgd.c
View File

@ -35,9 +35,9 @@ static struct kmem_cache *pgd_cache;
pgd_t *pgd_alloc(struct mm_struct *mm)
{
if (PGD_SIZE == PAGE_SIZE)
return (pgd_t *)get_zeroed_page(GFP_KERNEL);
return (pgd_t *)__get_free_page(PGALLOC_GFP);
else
return kmem_cache_zalloc(pgd_cache, GFP_KERNEL);
return kmem_cache_alloc(pgd_cache, PGALLOC_GFP);
}
void pgd_free(struct mm_struct *mm, pgd_t *pgd)

13
arch/arm64/net/bpf_jit_comp.c
View File

@ -60,7 +60,7 @@ struct jit_ctx {
const struct bpf_prog *prog;
int idx;
int tmp_used;
int body_offset;
int epilogue_offset;
int *offset;
u32 *image;
};
@ -130,8 +130,8 @@ static void jit_fill_hole(void *area, unsigned int size)
static inline int epilogue_offset(const struct jit_ctx *ctx)
{
int to = ctx->offset[ctx->prog->len - 1];
int from = ctx->idx - ctx->body_offset;
int to = ctx->epilogue_offset;
int from = ctx->idx;
return to - from;
}
@ -463,6 +463,8 @@ emit_cond_jmp:
}
/* function return */
case BPF_JMP | BPF_EXIT:
/* Optimization: when last instruction is EXIT,
simply fallthrough to epilogue. */
if (i == ctx->prog->len - 1)
break;
jmp_offset = epilogue_offset(ctx);
@ -685,11 +687,13 @@ void bpf_int_jit_compile(struct bpf_prog *prog)
/* 1. Initial fake pass to compute ctx->idx. */
/* Fake pass to fill in ctx->offset. */
/* Fake pass to fill in ctx->offset and ctx->tmp_used. */
if (build_body(&ctx))
goto out;
build_prologue(&ctx);
ctx.epilogue_offset = ctx.idx;
build_epilogue(&ctx);
/* Now we know the actual image size. */
@ -706,7 +710,6 @@ void bpf_int_jit_compile(struct bpf_prog *prog)
build_prologue(&ctx);
ctx.body_offset = ctx.idx;
if (build_body(&ctx)) {
bpf_jit_binary_free(header);
goto out;

3
arch/microblaze/include/asm/tlb.h
View File

@ -14,7 +14,6 @@
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <linux/pagemap.h>
#include <asm-generic/tlb.h>
#ifdef CONFIG_MMU
#define tlb_start_vma(tlb, vma) do { } while (0)
@ -22,4 +21,6 @@
#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
#endif
#include <asm-generic/tlb.h>
#endif /* _ASM_MICROBLAZE_TLB_H */

3
arch/powerpc/include/asm/pgalloc.h
View File

@ -3,7 +3,6 @@
#ifdef __KERNEL__
#include <linux/mm.h>
#include <asm-generic/tlb.h>
#ifdef CONFIG_PPC_BOOK3E
extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
@ -14,6 +13,8 @@ static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
}
#endif /* !CONFIG_PPC_BOOK3E */
extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
#ifdef CONFIG_PPC64
#include <asm/pgalloc-64.h>
#else

1
arch/powerpc/include/asm/tlb.h
View File

@ -27,6 +27,7 @@
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
extern void tlb_flush(struct mmu_gather *tlb);

2
arch/powerpc/mm/hugetlbpage.c
View File

@ -517,8 +517,6 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif
for (i = 0; i < num_hugepd; i++, hpdp++)
hpdp->pd = 0;
tlb->need_flush = 1;
#ifdef CONFIG_PPC_FSL_BOOK3E
hugepd_free(tlb, hugepte);
#else

79
drivers/firmware/dmi_scan.c
View File

@ -92,6 +92,12 @@ static void dmi_table(u8 *buf, int len, int num,
while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
const struct dmi_header *dm = (const struct dmi_header *)data;
/*
* 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0]
*/
if (dm->type == DMI_ENTRY_END_OF_TABLE)
break;
/*
* We want to know the total length (formatted area and
* strings) before decoding to make sure we won't run off the
@ -107,7 +113,7 @@ static void dmi_table(u8 *buf, int len, int num,
}
}
static u32 dmi_base;
static phys_addr_t dmi_base;
static u16 dmi_len;
static u16 dmi_num;
@ -467,7 +473,7 @@ static int __init dmi_present(const u8 *buf)
if (memcmp(buf, "_SM_", 4) == 0 &&
buf[5] < 32 && dmi_checksum(buf, buf[5])) {
smbios_ver = (buf[6] << 8) + buf[7];
smbios_ver = get_unaligned_be16(buf + 6);
/* Some BIOS report weird SMBIOS version, fix that up */
switch (smbios_ver) {
@ -489,10 +495,9 @@ static int __init dmi_present(const u8 *buf)
buf += 16;
if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) {
dmi_num = (buf[13] << 8) | buf[12];
dmi_len = (buf[7] << 8) | buf[6];
dmi_base = (buf[11] << 24) | (buf[10] << 16) |
(buf[9] << 8) | buf[8];
dmi_num = get_unaligned_le16(buf + 12);
dmi_len = get_unaligned_le16(buf + 6);
dmi_base = get_unaligned_le32(buf + 8);
if (dmi_walk_early(dmi_decode) == 0) {
if (smbios_ver) {
@ -514,12 +519,72 @@ static int __init dmi_present(const u8 *buf)
return 1;
}
/*
* Check for the SMBIOS 3.0 64-bit entry point signature. Unlike the legacy
* 32-bit entry point, there is no embedded DMI header (_DMI_) in here.
*/
static int __init dmi_smbios3_present(const u8 *buf)
{
if (memcmp(buf, "_SM3_", 5) == 0 &&
buf[6] < 32 && dmi_checksum(buf, buf[6])) {
dmi_ver = get_unaligned_be16(buf + 7);
dmi_len = get_unaligned_le32(buf + 12);
dmi_base = get_unaligned_le64(buf + 16);
/*
* The 64-bit SMBIOS 3.0 entry point no longer has a field
* containing the number of structures present in the table.
* Instead, it defines the table size as a maximum size, and
* relies on the end-of-table structure type (#127) to be used
* to signal the end of the table.
* So let's define dmi_num as an upper bound as well: each
* structure has a 4 byte header, so dmi_len / 4 is an upper
* bound for the number of structures in the table.
*/
dmi_num = dmi_len / 4;
if (dmi_walk_early(dmi_decode) == 0) {
pr_info("SMBIOS %d.%d present.\n",
dmi_ver >> 8, dmi_ver & 0xFF);
dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
pr_debug("DMI: %s\n", dmi_ids_string);
return 0;
}
}
return 1;
}
void __init dmi_scan_machine(void)
{
char __iomem *p, *q;
char buf[32];
if (efi_enabled(EFI_CONFIG_TABLES)) {
/*
* According to the DMTF SMBIOS reference spec v3.0.0, it is
* allowed to define both the 64-bit entry point (smbios3) and
* the 32-bit entry point (smbios), in which case they should
* either both point to the same SMBIOS structure table, or the
* table pointed to by the 64-bit entry point should contain a
* superset of the table contents pointed to by the 32-bit entry
* point (section 5.2)
* This implies that the 64-bit entry point should have
* precedence if it is defined and supported by the OS. If we
* have the 64-bit entry point, but fail to decode it, fall
* back to the legacy one (if available)
*/
if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) {
p = dmi_early_remap(efi.smbios3, 32);
if (p == NULL)
goto error;
memcpy_fromio(buf, p, 32);
dmi_early_unmap(p, 32);
if (!dmi_smbios3_present(buf)) {
dmi_available = 1;
goto out;
}
}
if (efi.smbios == EFI_INVALID_TABLE_ADDR)
goto error;
@ -552,7 +617,7 @@ void __init dmi_scan_machine(void)
memset(buf, 0, 16);
for (q = p; q < p + 0x10000; q += 16) {
memcpy_fromio(buf + 16, q, 16);
if (!dmi_present(buf)) {
if (!dmi_smbios3_present(buf) || !dmi_present(buf)) {
dmi_available = 1;
dmi_early_unmap(p, 0x10000);
goto out;

4
drivers/firmware/efi/efi.c
View File

@ -30,6 +30,7 @@ struct efi __read_mostly efi = {
.acpi = EFI_INVALID_TABLE_ADDR,
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
.sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,
@ -86,6 +87,8 @@ static ssize_t systab_show(struct kobject *kobj,
str += sprintf(str, "ACPI=0x%lx\n", efi.acpi);
if (efi.smbios != EFI_INVALID_TABLE_ADDR)
str += sprintf(str, "SMBIOS=0x%lx\n", efi.smbios);
if (efi.smbios3 != EFI_INVALID_TABLE_ADDR)
str += sprintf(str, "SMBIOS3=0x%lx\n", efi.smbios3);
if (efi.hcdp != EFI_INVALID_TABLE_ADDR)
str += sprintf(str, "HCDP=0x%lx\n", efi.hcdp);
if (efi.boot_info != EFI_INVALID_TABLE_ADDR)
@ -260,6 +263,7 @@ static __initdata efi_config_table_type_t common_tables[] = {
{MPS_TABLE_GUID, "MPS", &efi.mps},
{SAL_SYSTEM_TABLE_GUID, "SALsystab", &efi.sal_systab},
{SMBIOS_TABLE_GUID, "SMBIOS", &efi.smbios},
{SMBIOS3_TABLE_GUID, "SMBIOS 3.0", &efi.smbios3},
{UGA_IO_PROTOCOL_GUID, "UGA", &efi.uga},
{NULL_GUID, NULL, NULL},
};

11
drivers/firmware/efi/libstub/arm-stub.c
View File

@ -247,9 +247,18 @@ unsigned long __init efi_entry(void *handle, efi_system_table_t *sys_table,
goto fail_free_cmdline;
}
}
if (!fdt_addr)
if (fdt_addr) {
pr_efi(sys_table, "Using DTB from command line\n");
} else {
/* Look for a device tree configuration table entry. */
fdt_addr = (uintptr_t)get_fdt(sys_table);
if (fdt_addr)
pr_efi(sys_table, "Using DTB from configuration table\n");
}
if (!fdt_addr)
pr_efi(sys_table, "Generating empty DTB\n");
status = handle_cmdline_files(sys_table, image, cmdline_ptr,
"initrd=", dram_base + SZ_512M,

1
drivers/xen/efi.c
View File

@ -294,6 +294,7 @@ static const struct efi efi_xen __initconst = {
.acpi = EFI_INVALID_TABLE_ADDR,
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
.sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,

30
include/asm-generic/seccomp.h Normal file
View File

@ -0,0 +1,30 @@
/*
* include/asm-generic/seccomp.h
*
* Copyright (C) 2014 Linaro Limited
* Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_GENERIC_SECCOMP_H
#define _ASM_GENERIC_SECCOMP_H
#include <linux/unistd.h>
#if defined(CONFIG_COMPAT) && !defined(__NR_seccomp_read_32)
#define __NR_seccomp_read_32 __NR_read
#define __NR_seccomp_write_32 __NR_write
#define __NR_seccomp_exit_32 __NR_exit
#define __NR_seccomp_sigreturn_32 __NR_rt_sigreturn
#endif /* CONFIG_COMPAT && ! already defined */
#define __NR_seccomp_read __NR_read
#define __NR_seccomp_write __NR_write
#define __NR_seccomp_exit __NR_exit
#ifndef __NR_seccomp_sigreturn
#define __NR_seccomp_sigreturn __NR_rt_sigreturn
#endif
#endif /* _ASM_GENERIC_SECCOMP_H */

57
include/asm-generic/tlb.h
View File

@ -96,10 +96,9 @@ struct mmu_gather {
#endif
unsigned long start;
unsigned long end;
unsigned int need_flush : 1, /* Did free PTEs */
/* we are in the middle of an operation to clear
* a full mm and can make some optimizations */
fullmm : 1,
unsigned int fullmm : 1,
/* we have performed an operation which
* requires a complete flush of the tlb */
need_flush_all : 1;
@ -128,16 +127,54 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
tlb_flush_mmu(tlb);
}
static inline void __tlb_adjust_range(struct mmu_gather *tlb,
unsigned long address)
{
tlb->start = min(tlb->start, address);
tlb->end = max(tlb->end, address + PAGE_SIZE);
}
static inline void __tlb_reset_range(struct mmu_gather *tlb)
{
tlb->start = TASK_SIZE;
tlb->end = 0;
}
/*
* In the case of tlb vma handling, we can optimise these away in the
* case where we're doing a full MM flush. When we're doing a munmap,
* the vmas are adjusted to only cover the region to be torn down.
*/
#ifndef tlb_start_vma
#define tlb_start_vma(tlb, vma) do { } while (0)
#endif
#define __tlb_end_vma(tlb, vma) \
do { \
if (!tlb->fullmm && tlb->end) { \
tlb_flush(tlb); \
__tlb_reset_range(tlb); \
} \
} while (0)
#ifndef tlb_end_vma
#define tlb_end_vma __tlb_end_vma
#endif
#ifndef __tlb_remove_tlb_entry
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
#endif
/**
* tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.
*
* Record the fact that pte's were really umapped in ->need_flush, so we can
* later optimise away the tlb invalidate. This helps when userspace is
* unmapping already-unmapped pages, which happens quite a lot.
* Record the fact that pte's were really unmapped by updating the range,
* so we can later optimise away the tlb invalidate. This helps when
* userspace is unmapping already-unmapped pages, which happens quite a lot.
*/
#define tlb_remove_tlb_entry(tlb, ptep, address) \
do { \
tlb->need_flush = 1; \
__tlb_adjust_range(tlb, address); \
__tlb_remove_tlb_entry(tlb, ptep, address); \
} while (0)
@ -151,27 +188,27 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
#define tlb_remove_pmd_tlb_entry(tlb, pmdp, address) \
do { \
tlb->need_flush = 1; \
__tlb_adjust_range(tlb, address); \
__tlb_remove_pmd_tlb_entry(tlb, pmdp, address); \
} while (0)
#define pte_free_tlb(tlb, ptep, address) \
do { \
tlb->need_flush = 1; \
__tlb_adjust_range(tlb, address); \
__pte_free_tlb(tlb, ptep, address); \
} while (0)
#ifndef __ARCH_HAS_4LEVEL_HACK
#define pud_free_tlb(tlb, pudp, address) \
do { \
tlb->need_flush = 1; \
__tlb_adjust_range(tlb, address); \
__pud_free_tlb(tlb, pudp, address); \
} while (0)
#endif
#define pmd_free_tlb(tlb, pmdp, address) \
do { \
tlb->need_flush = 1; \
__tlb_adjust_range(tlb, address); \
__pmd_free_tlb(tlb, pmdp, address); \
} while (0)

6
include/linux/efi.h
View File

@ -547,6 +547,9 @@ void efi_native_runtime_setup(void);
#define SMBIOS_TABLE_GUID \
EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
#define SMBIOS3_TABLE_GUID \
EFI_GUID( 0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94 )
#define SAL_SYSTEM_TABLE_GUID \
EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
@ -810,7 +813,8 @@ extern struct efi {
unsigned long mps; /* MPS table */
unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
unsigned long acpi20; /* ACPI table (ACPI 2.0) */
unsigned long smbios; /* SM BIOS table */
unsigned long smbios; /* SMBIOS table (32 bit entry point) */
unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
unsigned long sal_systab; /* SAL system table */
unsigned long boot_info; /* boot info table */
unsigned long hcdp; /* HCDP table */

1
include/uapi/linux/elf.h
View File

@ -397,6 +397,7 @@ typedef struct elf64_shdr {
#define NT_ARM_TLS 0x401 /* ARM TLS register */
#define NT_ARM_HW_BREAK 0x402 /* ARM hardware breakpoint registers */
#define NT_ARM_HW_WATCH 0x403 /* ARM hardware watchpoint registers */
#define NT_ARM_SYSTEM_CALL 0x404 /* ARM system call number */
#define NT_METAG_CBUF 0x500 /* Metag catch buffer registers */
#define NT_METAG_RPIPE 0x501 /* Metag read pipeline state */
#define NT_METAG_TLS 0x502 /* Metag TLS pointer */

30
mm/memory.c
View File

@ -220,9 +220,6 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long
/* Is it from 0 to ~0? */
tlb->fullmm = !(start | (end+1));
tlb->need_flush_all = 0;
tlb->start = start;
tlb->end = end;
tlb->need_flush = 0;
tlb->local.next = NULL;
tlb->local.nr = 0;
tlb->local.max = ARRAY_SIZE(tlb->__pages);
@ -232,15 +229,20 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long
#ifdef CONFIG_HAVE_RCU_TABLE_FREE
tlb->batch = NULL;
#endif
__tlb_reset_range(tlb);
}
static void tlb_flush_mmu_tlbonly(struct mmu_gather *tlb)
{
tlb->need_flush = 0;
if (!tlb->end)
return;
tlb_flush(tlb);
#ifdef CONFIG_HAVE_RCU_TABLE_FREE
tlb_table_flush(tlb);
#endif
__tlb_reset_range(tlb);
}
static void tlb_flush_mmu_free(struct mmu_gather *tlb)
@ -256,8 +258,6 @@ static void tlb_flush_mmu_free(struct mmu_gather *tlb)
void tlb_flush_mmu(struct mmu_gather *tlb)
{
if (!tlb->need_flush)
return;
tlb_flush_mmu_tlbonly(tlb);
tlb_flush_mmu_free(tlb);
}
@ -292,7 +292,7 @@ int __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
{
struct mmu_gather_batch *batch;
VM_BUG_ON(!tlb->need_flush);
VM_BUG_ON(!tlb->end);
batch = tlb->active;
batch->pages[batch->nr++] = page;
@ -359,8 +359,6 @@ void tlb_remove_table(struct mmu_gather *tlb, void *table)
{
struct mmu_table_batch **batch = &tlb->batch;
tlb->need_flush = 1;
/*
* When there's less then two users of this mm there cannot be a
* concurrent page-table walk.
@ -1186,20 +1184,8 @@ again:
arch_leave_lazy_mmu_mode();
/* Do the actual TLB flush before dropping ptl */
if (force_flush) {
unsigned long old_end;
/*
* Flush the TLB just for the previous segment,
* then update the range to be the remaining
* TLB range.
*/
old_end = tlb->end;
tlb->end = addr;
if (force_flush)
tlb_flush_mmu_tlbonly(tlb);
tlb->start = addr;
tlb->end = old_end;
}
pte_unmap_unlock(start_pte, ptl);
/*