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arm64 fixes for -rc1

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- Fix double-evaluation of 'pte' macro argument when using 52-bit PAs
 
 - Fix signedness of some MTE prctl PR_* constants
 
 - Fix kmemleak memory usage by skipping early pgtable allocations
 
 - Fix printing of CPU feature register strings
 
 - Remove redundant -nostdlib linker flag for vDSO binaries
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:

 - Fix double-evaluation of 'pte' macro argument when using 52-bit PAs

 - Fix signedness of some MTE prctl PR_* constants

 - Fix kmemleak memory usage by skipping early pgtable allocations

 - Fix printing of CPU feature register strings

 - Remove redundant -nostdlib linker flag for vDSO binaries

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: pgtable: make __pte_to_phys/__phys_to_pte_val inline functions
  arm64: Track no early_pgtable_alloc() for kmemleak
  arm64: mte: change PR_MTE_TCF_NONE back into an unsigned long
  arm64: vdso: remove -nostdlib compiler flag
  arm64: arm64_ftr_reg->name may not be a human-readable string
This commit is contained in:
Linus Torvalds 2021-11-10 11:29:30 -08:00
commit 89fa0be0a0
11 changed files with 33 additions and 18 deletions
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2
arch/arm/mm/kasan_init.c
View File

@ -32,7 +32,7 @@ pmd_t tmp_pmd_table[PTRS_PER_PMD] __page_aligned_bss;
static __init void *kasan_alloc_block(size_t size)
{
return memblock_alloc_try_nid(size, size, __pa(MAX_DMA_ADDRESS),
MEMBLOCK_ALLOC_KASAN, NUMA_NO_NODE);
MEMBLOCK_ALLOC_NOLEAKTRACE, NUMA_NO_NODE);
}
static void __init kasan_pte_populate(pmd_t *pmdp, unsigned long addr,

12
arch/arm64/include/asm/pgtable.h
View File

@ -67,9 +67,15 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
* page table entry, taking care of 52-bit addresses.
*/
#ifdef CONFIG_ARM64_PA_BITS_52
#define __pte_to_phys(pte) \
((pte_val(pte) & PTE_ADDR_LOW) | ((pte_val(pte) & PTE_ADDR_HIGH) << 36))
#define __phys_to_pte_val(phys) (((phys) | ((phys) >> 36)) & PTE_ADDR_MASK)
static inline phys_addr_t __pte_to_phys(pte_t pte)
{
return (pte_val(pte) & PTE_ADDR_LOW) |
((pte_val(pte) & PTE_ADDR_HIGH) << 36);
}
static inline pteval_t __phys_to_pte_val(phys_addr_t phys)
{
return (phys | (phys >> 36)) & PTE_ADDR_MASK;
}
#else
#define __pte_to_phys(pte) (pte_val(pte) & PTE_ADDR_MASK)
#define __phys_to_pte_val(phys) (phys)

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

@ -573,15 +573,19 @@ static const struct arm64_ftr_bits ftr_raz[] = {
ARM64_FTR_END,
};
#define ARM64_FTR_REG_OVERRIDE(id, table, ovr) { \
#define __ARM64_FTR_REG_OVERRIDE(id_str, id, table, ovr) { \
.sys_id = id, \
.reg = &(struct arm64_ftr_reg){ \
.name = #id, \
.name = id_str, \
.override = (ovr), \
.ftr_bits = &((table)[0]), \
}}
#define ARM64_FTR_REG(id, table) ARM64_FTR_REG_OVERRIDE(id, table, &no_override)
#define ARM64_FTR_REG_OVERRIDE(id, table, ovr) \
__ARM64_FTR_REG_OVERRIDE(#id, id, table, ovr)
#define ARM64_FTR_REG(id, table) \
__ARM64_FTR_REG_OVERRIDE(#id, id, table, &no_override)
struct arm64_ftr_override __ro_after_init id_aa64mmfr1_override;
struct arm64_ftr_override __ro_after_init id_aa64pfr1_override;

2
arch/arm64/kernel/vdso/Makefile
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@ -23,7 +23,7 @@ btildflags-$(CONFIG_ARM64_BTI_KERNEL) += -z force-bti
# potential future proofing if we end up with internal calls to the exported
# routines, as x86 does (see 6f121e548f83 ("x86, vdso: Reimplement vdso.so
# preparation in build-time C")).
ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv \
ldflags-y := -shared -soname=linux-vdso.so.1 --hash-style=sysv \
-Bsymbolic --build-id=sha1 -n $(btildflags-y) -T
ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18

2
arch/arm64/kernel/vdso32/Makefile
View File

@ -102,7 +102,7 @@ VDSO_AFLAGS += -D__ASSEMBLY__
# From arm vDSO Makefile
VDSO_LDFLAGS += -Bsymbolic --no-undefined -soname=linux-vdso.so.1
VDSO_LDFLAGS += -z max-page-size=4096 -z common-page-size=4096
VDSO_LDFLAGS += -nostdlib -shared --hash-style=sysv --build-id=sha1
VDSO_LDFLAGS += -shared --hash-style=sysv --build-id=sha1
# Borrow vdsomunge.c from the arm vDSO

5
arch/arm64/mm/kasan_init.c
View File

@ -36,7 +36,7 @@ static phys_addr_t __init kasan_alloc_zeroed_page(int node)
{
void *p = memblock_alloc_try_nid(PAGE_SIZE, PAGE_SIZE,
__pa(MAX_DMA_ADDRESS),
MEMBLOCK_ALLOC_KASAN, node);
MEMBLOCK_ALLOC_NOLEAKTRACE, node);
if (!p)
panic("%s: Failed to allocate %lu bytes align=0x%lx nid=%d from=%llx\n",
__func__, PAGE_SIZE, PAGE_SIZE, node,
@ -49,7 +49,8 @@ static phys_addr_t __init kasan_alloc_raw_page(int node)
{
void *p = memblock_alloc_try_nid_raw(PAGE_SIZE, PAGE_SIZE,
__pa(MAX_DMA_ADDRESS),
MEMBLOCK_ALLOC_KASAN, node);
MEMBLOCK_ALLOC_NOLEAKTRACE,
node);
if (!p)
panic("%s: Failed to allocate %lu bytes align=0x%lx nid=%d from=%llx\n",
__func__, PAGE_SIZE, PAGE_SIZE, node,

3
arch/arm64/mm/mmu.c
View File

@ -96,7 +96,8 @@ static phys_addr_t __init early_pgtable_alloc(int shift)
phys_addr_t phys;
void *ptr;
phys = memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
phys = memblock_phys_alloc_range(PAGE_SIZE, PAGE_SIZE, 0,
MEMBLOCK_ALLOC_NOLEAKTRACE);
if (!phys)
panic("Failed to allocate page table page\n");

2
include/linux/memblock.h
View File

@ -389,7 +389,7 @@ static inline int memblock_get_region_node(const struct memblock_region *r)
/* Flags for memblock allocation APIs */
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
#define MEMBLOCK_ALLOC_KASAN 1
#define MEMBLOCK_ALLOC_NOLEAKTRACE 1
/* We are using top down, so it is safe to use 0 here */
#define MEMBLOCK_LOW_LIMIT 0

2
include/uapi/linux/prctl.h
View File

@ -235,7 +235,7 @@ struct prctl_mm_map {
#define PR_GET_TAGGED_ADDR_CTRL 56
# define PR_TAGGED_ADDR_ENABLE (1UL << 0)
/* MTE tag check fault modes */
# define PR_MTE_TCF_NONE 0
# define PR_MTE_TCF_NONE 0UL
# define PR_MTE_TCF_SYNC (1UL << 1)
# define PR_MTE_TCF_ASYNC (1UL << 2)
# define PR_MTE_TCF_MASK (PR_MTE_TCF_SYNC | PR_MTE_TCF_ASYNC)

9
mm/memblock.c
View File

@ -287,7 +287,7 @@ static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
{
/* pump up @end */
if (end == MEMBLOCK_ALLOC_ACCESSIBLE ||
end == MEMBLOCK_ALLOC_KASAN)
end == MEMBLOCK_ALLOC_NOLEAKTRACE)
end = memblock.current_limit;
/* avoid allocating the first page */
@ -1387,8 +1387,11 @@ again:
return 0;
done:
/* Skip kmemleak for kasan_init() due to high volume. */
if (end != MEMBLOCK_ALLOC_KASAN)
/*
* Skip kmemleak for those places like kasan_init() and
* early_pgtable_alloc() due to high volume.
*/
if (end != MEMBLOCK_ALLOC_NOLEAKTRACE)
/*
* The min_count is set to 0 so that memblock allocated
* blocks are never reported as leaks. This is because many

2
tools/include/uapi/linux/prctl.h
View File

@ -235,7 +235,7 @@ struct prctl_mm_map {
#define PR_GET_TAGGED_ADDR_CTRL 56
# define PR_TAGGED_ADDR_ENABLE (1UL << 0)
/* MTE tag check fault modes */
# define PR_MTE_TCF_NONE 0
# define PR_MTE_TCF_NONE 0UL
# define PR_MTE_TCF_SYNC (1UL << 1)
# define PR_MTE_TCF_ASYNC (1UL << 2)
# define PR_MTE_TCF_MASK (PR_MTE_TCF_SYNC | PR_MTE_TCF_ASYNC)