KVM: x86: trap invlpg
With pages out of sync invlpg needs to be trapped. For now simply nuke
the entry.
Untested on AMD.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 9d8c4bb..e89af1d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -877,6 +877,10 @@
return 1;
}
+static void nonpaging_invlpg(struct kvm_vcpu *vcpu, gva_t gva)
+{
+}
+
static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm, gfn_t gfn)
{
unsigned index;
@@ -1589,6 +1593,7 @@
context->free = nonpaging_free;
context->prefetch_page = nonpaging_prefetch_page;
context->sync_page = nonpaging_sync_page;
+ context->invlpg = nonpaging_invlpg;
context->root_level = 0;
context->shadow_root_level = PT32E_ROOT_LEVEL;
context->root_hpa = INVALID_PAGE;
@@ -1637,6 +1642,7 @@
context->gva_to_gpa = paging64_gva_to_gpa;
context->prefetch_page = paging64_prefetch_page;
context->sync_page = paging64_sync_page;
+ context->invlpg = paging64_invlpg;
context->free = paging_free;
context->root_level = level;
context->shadow_root_level = level;
@@ -1659,6 +1665,7 @@
context->free = paging_free;
context->prefetch_page = paging32_prefetch_page;
context->sync_page = paging32_sync_page;
+ context->invlpg = paging32_invlpg;
context->root_level = PT32_ROOT_LEVEL;
context->shadow_root_level = PT32E_ROOT_LEVEL;
context->root_hpa = INVALID_PAGE;
@@ -1679,6 +1686,7 @@
context->free = nonpaging_free;
context->prefetch_page = nonpaging_prefetch_page;
context->sync_page = nonpaging_sync_page;
+ context->invlpg = nonpaging_invlpg;
context->shadow_root_level = kvm_x86_ops->get_tdp_level();
context->root_hpa = INVALID_PAGE;
@@ -2071,6 +2079,16 @@
}
EXPORT_SYMBOL_GPL(kvm_mmu_page_fault);
+void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva)
+{
+ spin_lock(&vcpu->kvm->mmu_lock);
+ vcpu->arch.mmu.invlpg(vcpu, gva);
+ spin_unlock(&vcpu->kvm->mmu_lock);
+ kvm_mmu_flush_tlb(vcpu);
+ ++vcpu->stat.invlpg;
+}
+EXPORT_SYMBOL_GPL(kvm_mmu_invlpg);
+
void kvm_enable_tdp(void)
{
tdp_enabled = true;