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KVM: MMU: rename 'pt_write' to 'emulate' 

If 'pt_write' is true, we need to emulate the fault. And in later patch, we
need to emulate the fault even though it is not a pt_write event, so rename
it to better fit the meaning

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong 2011-07-12 03:25:56 +08:00 committed by Avi Kivity
parent b36c7a7c10
commit b90a0e6c81
2 changed files with 13 additions and 13 deletions
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10
arch/x86/kvm/mmu.c
View File

@ -2023,7 +2023,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
unsigned pt_access, unsigned pte_access,
int user_fault, int write_fault,
int *ptwrite, int level, gfn_t gfn,
int *emulate, int level, gfn_t gfn,
pfn_t pfn, bool speculative,
bool host_writable)
{
@ -2061,7 +2061,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
level, gfn, pfn, speculative, true,
host_writable)) {
if (write_fault)
*ptwrite = 1;
*emulate = 1;
kvm_mmu_flush_tlb(vcpu);
}
@ -2184,7 +2184,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
{
struct kvm_shadow_walk_iterator iterator;
struct kvm_mmu_page *sp;
int pt_write = 0;
int emulate = 0;
gfn_t pseudo_gfn;
for_each_shadow_entry(vcpu, (u64)gfn << PAGE_SHIFT, iterator) {
@ -2192,7 +2192,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
unsigned pte_access = ACC_ALL;
mmu_set_spte(vcpu, iterator.sptep, ACC_ALL, pte_access,
0, write, &pt_write,
0, write, &emulate,
level, gfn, pfn, prefault, map_writable);
direct_pte_prefetch(vcpu, iterator.sptep);
++vcpu->stat.pf_fixed;
@ -2220,7 +2220,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
| shadow_accessed_mask);
}
}
return pt_write;
return emulate;
}
static void kvm_send_hwpoison_signal(unsigned long address, struct task_struct *tsk)

16
arch/x86/kvm/paging_tmpl.h
View File

@ -467,7 +467,7 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw,
static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
struct guest_walker *gw,
int user_fault, int write_fault, int hlevel,
int *ptwrite, pfn_t pfn, bool map_writable,
int *emulate, pfn_t pfn, bool map_writable,
bool prefault)
{
unsigned access = gw->pt_access;
@ -538,7 +538,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
}
mmu_set_spte(vcpu, it.sptep, access, gw->pte_access,
user_fault, write_fault, ptwrite, it.level,
user_fault, write_fault, emulate, it.level,
gw->gfn, pfn, prefault, map_writable);
FNAME(pte_prefetch)(vcpu, gw, it.sptep);
@ -572,7 +572,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
int user_fault = error_code & PFERR_USER_MASK;
struct guest_walker walker;
u64 *sptep;
int write_pt = 0;
int emulate = 0;
int r;
pfn_t pfn;
int level = PT_PAGE_TABLE_LEVEL;
@ -633,19 +633,19 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
if (!force_pt_level)
transparent_hugepage_adjust(vcpu, &walker.gfn, &pfn, &level);
sptep = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault,
level, &write_pt, pfn, map_writable, prefault);
level, &emulate, pfn, map_writable, prefault);
(void)sptep;
pgprintk("%s: shadow pte %p %llx ptwrite %d\n", __func__,
sptep, *sptep, write_pt);
pgprintk("%s: shadow pte %p %llx emulate %d\n", __func__,
sptep, *sptep, emulate);
if (!write_pt)
if (!emulate)
vcpu->arch.last_pt_write_count = 0; /* reset fork detector */
++vcpu->stat.pf_fixed;
trace_kvm_mmu_audit(vcpu, AUDIT_POST_PAGE_FAULT);
spin_unlock(&vcpu->kvm->mmu_lock);
return write_pt;
return emulate;
out_unlock:
spin_unlock(&vcpu->kvm->mmu_lock);