This reverts commit bc6134942dbbf31c25e9bd7c876be5da81c9e1ce.
A CPUID instruction executed in VMX non-root mode always causes a
VM-exit, regardless of the leaf being queried.
Fixes: bc6134942dbb ("KVM: nested VMX: disable perf cpuid reporting")
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
---
arch/x86/kvm/cpuid.c | 6 ------
arch/x86/kvm/vmx.c | 2 --
2 files changed, 8 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 84b62ee..4b6e9ab 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -850,12 +850,6 @@ void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
if (!best)
best = check_cpuid_limit(vcpu, function, index);
- /*
- * Perfmon not yet supported for L2 guest.
- */
- if (is_guest_mode(vcpu) && function == 0xa)
- best = NULL;
-
if (best) {
*eax = best->eax;
*ebx = best->ebx;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 64774f4..c7a87ff 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8045,8 +8045,6 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu)
case EXIT_REASON_TASK_SWITCH:
return true;
case EXIT_REASON_CPUID:
- if (kvm_register_read(vcpu, VCPU_REGS_RAX) == 0xa)
- return false;
return true;
case EXIT_REASON_HLT:
return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING);
--
2.8.0.rc3.226.g39d4020
--
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