Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

KVM: MMU: audit: check whether have unsync sps after root sync

Browse source 
After root synced, all unsync sps are synced, this patch add a check to make
sure it's no unsync sps in VCPU's page table

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong 2010-09-27 18:09:29 +08:00 committed by Avi Kivity
parent 38904e1287
commit 6903074c36
2 changed files with 19 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
arch/x86/kvm/mmu.c
View file

@ -53,14 +53,18 @@ enum {
AUDIT_PRE_PAGE_FAULT, AUDIT_PRE_PAGE_FAULT,
AUDIT_POST_PAGE_FAULT, AUDIT_POST_PAGE_FAULT,
AUDIT_PRE_PTE_WRITE, AUDIT_PRE_PTE_WRITE,
AUDIT_POST_PTE_WRITE AUDIT_POST_PTE_WRITE,
AUDIT_PRE_SYNC,
AUDIT_POST_SYNC
}; };
char *audit_point_name[] = { char *audit_point_name[] = {
"pre page fault", "pre page fault",
"post page fault", "post page fault",
"pre pte write", "pre pte write",
"post pte write" "post pte write",
"pre sync",
"post sync"
}; };
#undef MMU_DEBUG #undef MMU_DEBUG
@ -2516,6 +2520,8 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)
if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
return; return;
trace_kvm_mmu_audit(vcpu, AUDIT_PRE_SYNC);
if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) { if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) {
hpa_t root = vcpu->arch.mmu.root_hpa; hpa_t root = vcpu->arch.mmu.root_hpa;
sp = page_header(root); sp = page_header(root);
@ -2531,6 +2537,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)
mmu_sync_children(vcpu, sp); mmu_sync_children(vcpu, sp);
} }
} }
trace_kvm_mmu_audit(vcpu, AUDIT_POST_SYNC);
} }
void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu) void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)

11
arch/x86/kvm/mmu_audit.c
View file

@ -164,6 +164,14 @@ static void audit_sptes_have_rmaps(struct kvm_vcpu *vcpu, u64 *sptep, int level)
inspect_spte_has_rmap(vcpu->kvm, sptep); inspect_spte_has_rmap(vcpu->kvm, sptep);
} }
static void audit_spte_after_sync(struct kvm_vcpu *vcpu, u64 *sptep, int level)
{
struct kvm_mmu_page *sp = page_header(__pa(sptep));
if (audit_point == AUDIT_POST_SYNC && sp->unsync)
audit_printk("meet unsync sp(%p) after sync root.\n", sp);
}
static void check_mappings_rmap(struct kvm *kvm, struct kvm_mmu_page *sp) static void check_mappings_rmap(struct kvm *kvm, struct kvm_mmu_page *sp)
{ {
int i; int i;
@ -179,7 +187,7 @@ static void check_mappings_rmap(struct kvm *kvm, struct kvm_mmu_page *sp)
} }
} }
void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp) static void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
{ {
struct kvm_memory_slot *slot; struct kvm_memory_slot *slot;
unsigned long *rmapp; unsigned long *rmapp;
@ -215,6 +223,7 @@ static void audit_spte(struct kvm_vcpu *vcpu, u64 *sptep, int level)
{ {
audit_sptes_have_rmaps(vcpu, sptep, level); audit_sptes_have_rmaps(vcpu, sptep, level);
audit_mappings(vcpu, sptep, level); audit_mappings(vcpu, sptep, level);
audit_spte_after_sync(vcpu, sptep, level);
} }
static void audit_vcpu_spte(struct kvm_vcpu *vcpu) static void audit_vcpu_spte(struct kvm_vcpu *vcpu)