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/svm.c b/arch/x86/kvm/svm.c
index 9b54550..9c4ce65 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -525,6 +525,7 @@
(1ULL << INTERCEPT_CPUID) |
(1ULL << INTERCEPT_INVD) |
(1ULL << INTERCEPT_HLT) |
+ (1ULL << INTERCEPT_INVLPG) |
(1ULL << INTERCEPT_INVLPGA) |
(1ULL << INTERCEPT_IOIO_PROT) |
(1ULL << INTERCEPT_MSR_PROT) |
@@ -589,7 +590,8 @@
if (npt_enabled) {
/* Setup VMCB for Nested Paging */
control->nested_ctl = 1;
- control->intercept &= ~(1ULL << INTERCEPT_TASK_SWITCH);
+ control->intercept &= ~((1ULL << INTERCEPT_TASK_SWITCH) |
+ (1ULL << INTERCEPT_INVLPG));
control->intercept_exceptions &= ~(1 << PF_VECTOR);
control->intercept_cr_read &= ~(INTERCEPT_CR0_MASK|
INTERCEPT_CR3_MASK);
@@ -1164,6 +1166,13 @@
return 1;
}
+static int invlpg_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
+{
+ if (emulate_instruction(&svm->vcpu, kvm_run, 0, 0, 0) != EMULATE_DONE)
+ pr_unimpl(&svm->vcpu, "%s: failed\n", __func__);
+ return 1;
+}
+
static int emulate_on_interception(struct vcpu_svm *svm,
struct kvm_run *kvm_run)
{
@@ -1417,7 +1426,7 @@
[SVM_EXIT_CPUID] = cpuid_interception,
[SVM_EXIT_INVD] = emulate_on_interception,
[SVM_EXIT_HLT] = halt_interception,
- [SVM_EXIT_INVLPG] = emulate_on_interception,
+ [SVM_EXIT_INVLPG] = invlpg_interception,
[SVM_EXIT_INVLPGA] = invalid_op_interception,
[SVM_EXIT_IOIO] = io_interception,
[SVM_EXIT_MSR] = msr_interception,
