From: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
- Unsync pages contain writable sptes in the rmap.
- rmaps do not exclusively contain writable sptes anymore.
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/mmu.c | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index fd5579c..4c2585c 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3260,20 +3260,28 @@ static void audit_write_protection(struct kvm_vcpu *vcpu)
struct kvm_mmu_page *sp;
struct kvm_memory_slot *slot;
unsigned long *rmapp;
+ u64 *spte;
gfn_t gfn;
list_for_each_entry(sp, &vcpu->kvm->arch.active_mmu_pages, link) {
if (sp->role.direct)
continue;
+ if (sp->unsync)
+ continue;
gfn = unalias_gfn(vcpu->kvm, sp->gfn);
slot = gfn_to_memslot_unaliased(vcpu->kvm, sp->gfn);
rmapp = &slot->rmap[gfn - slot->base_gfn];
- if (*rmapp)
- printk(KERN_ERR "%s: (%s) shadow page has writable"
- " mappings: gfn %lx role %x\n",
+
+ spte = rmap_next(vcpu->kvm, rmapp, NULL);
+ while (spte) {
+ if (*spte & PT_WRITABLE_MASK)
+ printk(KERN_ERR "%s: (%s) shadow page has "
+ "writable mappings: gfn %lx role %x\n",
__func__, audit_msg, sp->gfn,
sp->role.word);
+ spte = rmap_next(vcpu->kvm, rmapp, spte);
+ }
}
}
--
1.6.3.3
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
