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Merge branch 'for-upstream' of git://github.com/agraf/linux-2.6 into next

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Alex says:

"Changes this time include:

  - Generalize KVM_GUEST support to overall ePAPR code
  - Fix reset for Book3S HV
  - Fix machine check deferral when CONFIG_KVM_GUEST=y
  - Add support for BookE register DECAR"

* 'for-upstream' of git://github.com/agraf/linux-2.6:
  KVM: PPC: Not optimizing MSR_CE and MSR_ME with paravirt.
  KVM: PPC: booke: Added DECAR support
  KVM: PPC: Book3S HV: Make the guest hash table size configurable
  KVM: PPC: Factor out guest epapr initialization

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-06-06 15:31:34 +03:00
commit 25e531a988
21 changed files with 306 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
Documentation/virtual/kvm/api.txt
View File

@ -1930,6 +1930,42 @@ The "pte_enc" field provides a value that can OR'ed into the hash
PTE's RPN field (ie, it needs to be shifted left by 12 to OR it
into the hash PTE second double word).
4.75 KVM_PPC_ALLOCATE_HTAB
Capability: KVM_CAP_PPC_ALLOC_HTAB
Architectures: powerpc
Type: vm ioctl
Parameters: Pointer to u32 containing hash table order (in/out)
Returns: 0 on success, -1 on error
This requests the host kernel to allocate an MMU hash table for a
guest using the PAPR paravirtualization interface. This only does
anything if the kernel is configured to use the Book 3S HV style of
virtualization. Otherwise the capability doesn't exist and the ioctl
returns an ENOTTY error. The rest of this description assumes Book 3S
HV.
There must be no vcpus running when this ioctl is called; if there
are, it will do nothing and return an EBUSY error.
The parameter is a pointer to a 32-bit unsigned integer variable
containing the order (log base 2) of the desired size of the hash
table, which must be between 18 and 46. On successful return from the
ioctl, it will have been updated with the order of the hash table that
was allocated.
If no hash table has been allocated when any vcpu is asked to run
(with the KVM_RUN ioctl), the host kernel will allocate a
default-sized hash table (16 MB).
If this ioctl is called when a hash table has already been allocated,
the kernel will clear out the existing hash table (zero all HPTEs) and
return the hash table order in the parameter. (If the guest is using
the virtualized real-mode area (VRMA) facility, the kernel will
re-create the VMRA HPTEs on the next KVM_RUN of any vcpu.)
5. The kvm_run structure
------------------------

2
Documentation/virtual/kvm/ppc-pv.txt
View File

@ -109,8 +109,6 @@ The following bits are safe to be set inside the guest:
MSR_EE
MSR_RI
MSR_CR
MSR_ME
If any other bit changes in the MSR, please still use mtmsr(d).

2
arch/powerpc/include/asm/epapr_hcalls.h
View File

@ -153,6 +153,8 @@
#define EV_HCALL_CLOBBERS2 EV_HCALL_CLOBBERS3, "r5"
#define EV_HCALL_CLOBBERS1 EV_HCALL_CLOBBERS2, "r4"
extern bool epapr_paravirt_enabled;
extern u32 epapr_hypercall_start[];
/*
* We use "uintptr_t" to define a register because it's guaranteed to be a

7
arch/powerpc/include/asm/kvm_book3s_64.h
View File

@ -36,11 +36,8 @@ static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu)
#define SPAPR_TCE_SHIFT 12
#ifdef CONFIG_KVM_BOOK3S_64_HV
/* For now use fixed-size 16MB page table */
#define HPT_ORDER 24
#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
#define HPT_NPTE (HPT_NPTEG << 3) /* 8 PTEs per PTEG */
#define HPT_HASH_MASK (HPT_NPTEG - 1)
#define KVM_DEFAULT_HPT_ORDER 24 /* 16MB HPT by default */
extern int kvm_hpt_order; /* order of preallocated HPTs */
#endif
#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */

6
arch/powerpc/include/asm/kvm_host.h
View File

@ -237,6 +237,10 @@ struct kvm_arch {
unsigned long vrma_slb_v;
int rma_setup_done;
int using_mmu_notifiers;
u32 hpt_order;
atomic_t vcpus_running;
unsigned long hpt_npte;
unsigned long hpt_mask;
spinlock_t slot_phys_lock;
unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
int slot_npages[KVM_MEM_SLOTS_NUM];
@ -414,7 +418,9 @@ struct kvm_vcpu_arch {
ulong mcsrr1;
ulong mcsr;
u32 dec;
#ifdef CONFIG_BOOKE
u32 decar;
#endif
u32 tbl;
u32 tbu;
u32 tcr;

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

@ -119,7 +119,8 @@ extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
extern long kvmppc_alloc_hpt(struct kvm *kvm);
extern long kvmppc_alloc_hpt(struct kvm *kvm, u32 *htab_orderp);
extern long kvmppc_alloc_reset_hpt(struct kvm *kvm, u32 *htab_orderp);
extern void kvmppc_free_hpt(struct kvm *kvm);
extern long kvmppc_prepare_vrma(struct kvm *kvm,
struct kvm_userspace_memory_region *mem);

1
arch/powerpc/kernel/Makefile
View File

@ -128,6 +128,7 @@ ifneq ($(CONFIG_XMON)$(CONFIG_KEXEC),)
obj-y += ppc_save_regs.o
endif
obj-$(CONFIG_EPAPR_PARAVIRT) += epapr_paravirt.o epapr_hcalls.o
obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o
# Disable GCOV in odd or sensitive code

25
arch/powerpc/kernel/epapr_hcalls.S Normal file
View File

@ -0,0 +1,25 @@
/*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
*
* 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; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/threads.h>
#include <asm/reg.h>
#include <asm/page.h>
#include <asm/cputable.h>
#include <asm/thread_info.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
/* Hypercall entry point. Will be patched with device tree instructions. */
.global epapr_hypercall_start
epapr_hypercall_start:
li r3, -1
nop
nop
nop
blr

52
arch/powerpc/kernel/epapr_paravirt.c Normal file
View File

@ -0,0 +1,52 @@
/*
* ePAPR para-virtualization support.
*
* 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, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
*/
#include <linux/of.h>
#include <asm/epapr_hcalls.h>
#include <asm/cacheflush.h>
#include <asm/code-patching.h>
bool epapr_paravirt_enabled;
static int __init epapr_paravirt_init(void)
{
struct device_node *hyper_node;
const u32 *insts;
int len, i;
hyper_node = of_find_node_by_path("/hypervisor");
if (!hyper_node)
return -ENODEV;
insts = of_get_property(hyper_node, "hcall-instructions", &len);
if (!insts)
return -ENODEV;
if (len % 4 || len > (4 * 4))
return -ENODEV;
for (i = 0; i < (len / 4); i++)
patch_instruction(epapr_hypercall_start + i, insts[i]);
epapr_paravirt_enabled = true;
return 0;
}
early_initcall(epapr_paravirt_init);

28
arch/powerpc/kernel/kvm.c
View File

@ -31,6 +31,7 @@
#include <asm/cacheflush.h>
#include <asm/disassemble.h>
#include <asm/ppc-opcode.h>
#include <asm/epapr_hcalls.h>
#define KVM_MAGIC_PAGE (-4096L)
#define magic_var(x) KVM_MAGIC_PAGE + offsetof(struct kvm_vcpu_arch_shared, x)
@ -726,7 +727,7 @@ unsigned long kvm_hypercall(unsigned long *in,
unsigned long register r11 asm("r11") = nr;
unsigned long register r12 asm("r12");
asm volatile("bl kvm_hypercall_start"
asm volatile("bl epapr_hypercall_start"
: "=r"(r0), "=r"(r3), "=r"(r4), "=r"(r5), "=r"(r6),
"=r"(r7), "=r"(r8), "=r"(r9), "=r"(r10), "=r"(r11),
"=r"(r12)
@ -747,29 +748,6 @@ unsigned long kvm_hypercall(unsigned long *in,
}
EXPORT_SYMBOL_GPL(kvm_hypercall);
static int kvm_para_setup(void)
{
extern u32 kvm_hypercall_start;
struct device_node *hyper_node;
u32 *insts;
int len, i;
hyper_node = of_find_node_by_path("/hypervisor");
if (!hyper_node)
return -1;
insts = (u32*)of_get_property(hyper_node, "hcall-instructions", &len);
if (len % 4)
return -1;
if (len > (4 * 4))
return -1;
for (i = 0; i < (len / 4); i++)
kvm_patch_ins(&(&kvm_hypercall_start)[i], insts[i]);
return 0;
}
static __init void kvm_free_tmp(void)
{
unsigned long start, end;
@ -791,7 +769,7 @@ static int __init kvm_guest_init(void)
if (!kvm_para_available())
goto free_tmp;
if (kvm_para_setup())
if (!epapr_paravirt_enabled)
goto free_tmp;
if (kvm_para_has_feature(KVM_FEATURE_MAGIC_PAGE))

12
arch/powerpc/kernel/kvm_emul.S
View File

@ -24,16 +24,6 @@
#include <asm/page.h>
#include <asm/asm-offsets.h>
/* Hypercall entry point. Will be patched with device tree instructions. */
.global kvm_hypercall_start
kvm_hypercall_start:
li r3, -1
nop
nop
nop
blr
#define KVM_MAGIC_PAGE (-4096)
#ifdef CONFIG_64BIT
@ -132,7 +122,7 @@ kvm_emulate_mtmsrd_len:
.long (kvm_emulate_mtmsrd_end - kvm_emulate_mtmsrd) / 4
#define MSR_SAFE_BITS (MSR_EE | MSR_CE | MSR_ME | MSR_RI)
#define MSR_SAFE_BITS (MSR_EE | MSR_RI)
#define MSR_CRITICAL_BITS ~MSR_SAFE_BITS
.global kvm_emulate_mtmsr

123
arch/powerpc/kvm/book3s_64_mmu_hv.c
View File

@ -37,56 +37,121 @@
/* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */
#define MAX_LPID_970 63
long kvmppc_alloc_hpt(struct kvm *kvm)
/* Power architecture requires HPT is at least 256kB */
#define PPC_MIN_HPT_ORDER 18
long kvmppc_alloc_hpt(struct kvm *kvm, u32 *htab_orderp)
{
unsigned long hpt;
long lpid;
struct revmap_entry *rev;
struct kvmppc_linear_info *li;
long order = kvm_hpt_order;
/* Allocate guest's hashed page table */
li = kvm_alloc_hpt();
if (li) {
/* using preallocated memory */
hpt = (ulong)li->base_virt;
kvm->arch.hpt_li = li;
} else {
/* using dynamic memory */
if (htab_orderp) {
order = *htab_orderp;
if (order < PPC_MIN_HPT_ORDER)
order = PPC_MIN_HPT_ORDER;
}
/*
* If the user wants a different size from default,
* try first to allocate it from the kernel page allocator.
*/
hpt = 0;
if (order != kvm_hpt_order) {
hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|
__GFP_NOWARN, HPT_ORDER - PAGE_SHIFT);
__GFP_NOWARN, order - PAGE_SHIFT);
if (!hpt)
--order;
}
/* Next try to allocate from the preallocated pool */
if (!hpt) {
pr_err("kvm_alloc_hpt: Couldn't alloc HPT\n");
return -ENOMEM;
li = kvm_alloc_hpt();
if (li) {
hpt = (ulong)li->base_virt;
kvm->arch.hpt_li = li;
order = kvm_hpt_order;
}
}
/* Lastly try successively smaller sizes from the page allocator */
while (!hpt && order > PPC_MIN_HPT_ORDER) {
hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|
__GFP_NOWARN, order - PAGE_SHIFT);
if (!hpt)
--order;
}
if (!hpt)
return -ENOMEM;
kvm->arch.hpt_virt = hpt;
kvm->arch.hpt_order = order;
/* HPTEs are 2**4 bytes long */
kvm->arch.hpt_npte = 1ul << (order - 4);
/* 128 (2**7) bytes in each HPTEG */
kvm->arch.hpt_mask = (1ul << (order - 7)) - 1;
/* Allocate reverse map array */
rev = vmalloc(sizeof(struct revmap_entry) * HPT_NPTE);
rev = vmalloc(sizeof(struct revmap_entry) * kvm->arch.hpt_npte);
if (!rev) {
pr_err("kvmppc_alloc_hpt: Couldn't alloc reverse map array\n");
goto out_freehpt;
}
kvm->arch.revmap = rev;
kvm->arch.sdr1 = __pa(hpt) | (order - 18);
lpid = kvmppc_alloc_lpid();
if (lpid < 0)
goto out_freeboth;
pr_info("KVM guest htab at %lx (order %ld), LPID %x\n",
hpt, order, kvm->arch.lpid);
kvm->arch.sdr1 = __pa(hpt) | (HPT_ORDER - 18);
kvm->arch.lpid = lpid;
pr_info("KVM guest htab at %lx, LPID %lx\n", hpt, lpid);
if (htab_orderp)
*htab_orderp = order;
return 0;
out_freeboth:
vfree(rev);
out_freehpt:
free_pages(hpt, HPT_ORDER - PAGE_SHIFT);
if (kvm->arch.hpt_li)
kvm_release_hpt(kvm->arch.hpt_li);
else
free_pages(hpt, order - PAGE_SHIFT);
return -ENOMEM;
}
long kvmppc_alloc_reset_hpt(struct kvm *kvm, u32 *htab_orderp)
{
long err = -EBUSY;
long order;
mutex_lock(&kvm->lock);
if (kvm->arch.rma_setup_done) {
kvm->arch.rma_setup_done = 0;
/* order rma_setup_done vs. vcpus_running */
smp_mb();
if (atomic_read(&kvm->arch.vcpus_running)) {
kvm->arch.rma_setup_done = 1;
goto out;
}
}
if (kvm->arch.hpt_virt) {
order = kvm->arch.hpt_order;
/* Set the entire HPT to 0, i.e. invalid HPTEs */
memset((void *)kvm->arch.hpt_virt, 0, 1ul << order);
/*
* Set the whole last_vcpu array to an invalid vcpu number.
* This ensures that each vcpu will flush its TLB on next entry.
*/
memset(kvm->arch.last_vcpu, 0xff, sizeof(kvm->arch.last_vcpu));
*htab_orderp = order;
err = 0;
} else {
err = kvmppc_alloc_hpt(kvm, htab_orderp);
order = *htab_orderp;
}
out:
mutex_unlock(&kvm->lock);
return err;
}
void kvmppc_free_hpt(struct kvm *kvm)
{
kvmppc_free_lpid(kvm->arch.lpid);
@ -94,7 +159,8 @@ void kvmppc_free_hpt(struct kvm *kvm)
if (kvm->arch.hpt_li)
kvm_release_hpt(kvm->arch.hpt_li);
else
free_pages(kvm->arch.hpt_virt, HPT_ORDER - PAGE_SHIFT);
free_pages(kvm->arch.hpt_virt,
kvm->arch.hpt_order - PAGE_SHIFT);
}
/* Bits in first HPTE dword for pagesize 4k, 64k or 16M */
@ -119,6 +185,7 @@ void kvmppc_map_vrma(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot,
unsigned long psize;
unsigned long hp0, hp1;
long ret;
struct kvm *kvm = vcpu->kvm;
psize = 1ul << porder;
npages = memslot->npages >> (porder - PAGE_SHIFT);
@ -127,8 +194,8 @@ void kvmppc_map_vrma(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot,
if (npages > 1ul << (40 - porder))
npages = 1ul << (40 - porder);
/* Can't use more than 1 HPTE per HPTEG */
if (npages > HPT_NPTEG)
npages = HPT_NPTEG;
if (npages > kvm->arch.hpt_mask + 1)
npages = kvm->arch.hpt_mask + 1;
hp0 = HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16)) |
HPTE_V_BOLTED | hpte0_pgsize_encoding(psize);
@ -138,7 +205,7 @@ void kvmppc_map_vrma(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot,
for (i = 0; i < npages; ++i) {
addr = i << porder;
/* can't use hpt_hash since va > 64 bits */
hash = (i ^ (VRMA_VSID ^ (VRMA_VSID << 25))) & HPT_HASH_MASK;
hash = (i ^ (VRMA_VSID ^ (VRMA_VSID << 25))) & kvm->arch.hpt_mask;
/*
* We assume that the hash table is empty and no
* vcpus are using it at this stage. Since we create

40
arch/powerpc/kvm/book3s_hv.c
View File

@ -56,7 +56,7 @@
/* #define EXIT_DEBUG_INT */
static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu);
static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
@ -1068,11 +1068,15 @@ int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
return -EINTR;
}
/* On the first time here, set up VRMA or RMA */
atomic_inc(&vcpu->kvm->arch.vcpus_running);
/* Order vcpus_running vs. rma_setup_done, see kvmppc_alloc_reset_hpt */
smp_mb();
/* On the first time here, set up HTAB and VRMA or RMA */
if (!vcpu->kvm->arch.rma_setup_done) {
r = kvmppc_hv_setup_rma(vcpu);
r = kvmppc_hv_setup_htab_rma(vcpu);
if (r)
return r;
goto out;
}
flush_fp_to_thread(current);
@ -1090,6 +1094,9 @@ int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
kvmppc_core_prepare_to_enter(vcpu);
}
} while (r == RESUME_GUEST);
out:
atomic_dec(&vcpu->kvm->arch.vcpus_running);
return r;
}
@ -1305,7 +1312,7 @@ void kvmppc_core_commit_memory_region(struct kvm *kvm,
{
}
static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu)
static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
{
int err = 0;
struct kvm *kvm = vcpu->kvm;
@ -1324,6 +1331,15 @@ static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu)
if (kvm->arch.rma_setup_done)
goto out; /* another vcpu beat us to it */
/* Allocate hashed page table (if not done already) and reset it */
if (!kvm->arch.hpt_virt) {
err = kvmppc_alloc_hpt(kvm, NULL);
if (err) {
pr_err("KVM: Couldn't alloc HPT\n");
goto out;
}
}
/* Look up the memslot for guest physical address 0 */
memslot = gfn_to_memslot(kvm, 0);
@ -1435,13 +1451,14 @@ static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu)
int kvmppc_core_init_vm(struct kvm *kvm)
{
long r;
unsigned long lpcr;
unsigned long lpcr, lpid;
/* Allocate hashed page table */
r = kvmppc_alloc_hpt(kvm);
if (r)
return r;
/* Allocate the guest's logical partition ID */
lpid = kvmppc_alloc_lpid();
if (lpid < 0)
return -ENOMEM;
kvm->arch.lpid = lpid;
INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
@ -1451,7 +1468,6 @@ int kvmppc_core_init_vm(struct kvm *kvm)
if (cpu_has_feature(CPU_FTR_ARCH_201)) {
/* PPC970; HID4 is effectively the LPCR */
unsigned long lpid = kvm->arch.lpid;
kvm->arch.host_lpid = 0;
kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4);
lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH));

5
arch/powerpc/kvm/book3s_hv_builtin.c
View File

@ -25,6 +25,9 @@ static void __init kvm_linear_init_one(ulong size, int count, int type);
static struct kvmppc_linear_info *kvm_alloc_linear(int type);
static void kvm_release_linear(struct kvmppc_linear_info *ri);
int kvm_hpt_order = KVM_DEFAULT_HPT_ORDER;
EXPORT_SYMBOL_GPL(kvm_hpt_order);
/*************** RMA *************/
/*
@ -209,7 +212,7 @@ static void kvm_release_linear(struct kvmppc_linear_info *ri)
void __init kvm_linear_init(void)
{
/* HPT */
kvm_linear_init_one(1 << HPT_ORDER, kvm_hpt_count, KVM_LINEAR_HPT);
kvm_linear_init_one(1 << kvm_hpt_order, kvm_hpt_count, KVM_LINEAR_HPT);
/* RMA */
/* Only do this on PPC970 in HV mode */

15
arch/powerpc/kvm/book3s_hv_rm_mmu.c
View File

@ -237,7 +237,7 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
/* Find and lock the HPTEG slot to use */
do_insert:
if (pte_index >= HPT_NPTE)
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
if (likely((flags & H_EXACT) == 0)) {
pte_index &= ~7UL;
@ -352,7 +352,7 @@ long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long v, r, rb;
struct revmap_entry *rev;
if (pte_index >= HPT_NPTE)
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
while (!try_lock_hpte(hpte, HPTE_V_HVLOCK))
@ -419,7 +419,8 @@ long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu)
i = 4;
break;
}
if (req != 1 || flags == 3 || pte_index >= HPT_NPTE) {
if (req != 1 || flags == 3 ||
pte_index >= kvm->arch.hpt_npte) {
/* parameter error */
args[j] = ((0xa0 | flags) << 56) + pte_index;
ret = H_PARAMETER;
@ -521,7 +522,7 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
struct revmap_entry *rev;
unsigned long v, r, rb, mask, bits;
if (pte_index >= HPT_NPTE)
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
hpte = (unsigned long *)(kvm->arch.hpt_virt + (pte_index << 4));
@ -583,7 +584,7 @@ long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
int i, n = 1;
struct revmap_entry *rev = NULL;
if (pte_index >= HPT_NPTE)
if (pte_index >= kvm->arch.hpt_npte)
return H_PARAMETER;
if (flags & H_READ_4) {
pte_index &= ~3;
@ -678,7 +679,7 @@ long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, unsigned long slb_v,
somask = (1UL << 28) - 1;
vsid = (slb_v & ~SLB_VSID_B) >> SLB_VSID_SHIFT;
}
hash = (vsid ^ ((eaddr & somask) >> pshift)) & HPT_HASH_MASK;
hash = (vsid ^ ((eaddr & somask) >> pshift)) & kvm->arch.hpt_mask;
avpn = slb_v & ~(somask >> 16); /* also includes B */
avpn |= (eaddr & somask) >> 16;
@ -723,7 +724,7 @@ long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, unsigned long slb_v,
if (val & HPTE_V_SECONDARY)
break;
val |= HPTE_V_SECONDARY;
hash = hash ^ HPT_HASH_MASK;
hash = hash ^ kvm->arch.hpt_mask;
}
return -1;
}

5
arch/powerpc/kvm/booke.c
View File

@ -1267,6 +1267,11 @@ void kvmppc_decrementer_func(unsigned long data)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
if (vcpu->arch.tcr & TCR_ARE) {
vcpu->arch.dec = vcpu->arch.decar;
kvmppc_emulate_dec(vcpu);
}
kvmppc_set_tsr_bits(vcpu, TSR_DIS);
}

3
arch/powerpc/kvm/booke_emulate.c
View File

@ -129,6 +129,9 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
kvmppc_set_tcr(vcpu, spr_val);
break;
case SPRN_DECAR:
vcpu->arch.decar = spr_val;
break;
/*
* Note: SPRG4-7 are user-readable.
* These values are loaded into the real SPRGs when resuming the

3
arch/powerpc/kvm/e500_emulate.c
View File

@ -269,6 +269,9 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
*spr_val = vcpu->arch.shared->mas7_3 >> 32;
break;
#endif
case SPRN_DECAR:
*spr_val = vcpu->arch.decar;
break;
case SPRN_TLB0CFG:
*spr_val = vcpu->arch.tlbcfg[0];
break;

18
arch/powerpc/kvm/powerpc.c
View File

@ -246,6 +246,7 @@ int kvm_dev_ioctl_check_extension(long ext)
#endif
#ifdef CONFIG_PPC_BOOK3S_64
case KVM_CAP_SPAPR_TCE:
case KVM_CAP_PPC_ALLOC_HTAB:
r = 1;
break;
#endif /* CONFIG_PPC_BOOK3S_64 */
@ -802,6 +803,23 @@ long kvm_arch_vm_ioctl(struct file *filp,
r = -EFAULT;
break;
}
case KVM_PPC_ALLOCATE_HTAB: {
struct kvm *kvm = filp->private_data;
u32 htab_order;
r = -EFAULT;
if (get_user(htab_order, (u32 __user *)argp))
break;
r = kvmppc_alloc_reset_hpt(kvm, &htab_order);
if (r)
break;
r = -EFAULT;
if (put_user(htab_order, (u32 __user *)argp))
break;
r = 0;
break;
}
#endif /* CONFIG_KVM_BOOK3S_64_HV */
#ifdef CONFIG_PPC_BOOK3S_64

9
arch/powerpc/platforms/Kconfig
View File

@ -25,6 +25,7 @@ source "arch/powerpc/platforms/wsp/Kconfig"
config KVM_GUEST
bool "KVM Guest support"
default n
select EPAPR_PARAVIRT
---help---
This option enables various optimizations for running under the KVM
hypervisor. Overhead for the kernel when not running inside KVM should
@ -32,6 +33,14 @@ config KVM_GUEST
In case of doubt, say Y
config EPAPR_PARAVIRT
bool "ePAPR para-virtualization support"
default n
help
Enables ePAPR para-virtualization support for guests.
In case of doubt, say Y
config PPC_NATIVE
bool
depends on 6xx || PPC64

3
include/linux/kvm.h
View File

@ -617,6 +617,7 @@ struct kvm_ppc_smmu_info {
#define KVM_CAP_SIGNAL_MSI 77
#define KVM_CAP_PPC_GET_SMMU_INFO 78
#define KVM_CAP_S390_COW 79
#define KVM_CAP_PPC_ALLOC_HTAB 80
#ifdef KVM_CAP_IRQ_ROUTING
@ -828,6 +829,8 @@ struct kvm_s390_ucas_mapping {
#define KVM_SIGNAL_MSI _IOW(KVMIO, 0xa5, struct kvm_msi)
/* Available with KVM_CAP_PPC_GET_SMMU_INFO */
#define KVM_PPC_GET_SMMU_INFO _IOR(KVMIO, 0xa6, struct kvm_ppc_smmu_info)
/* Available with KVM_CAP_PPC_ALLOC_HTAB */
#define KVM_PPC_ALLOCATE_HTAB _IOWR(KVMIO, 0xa7, __u32)
/*
* ioctls for vcpu fds