diff options
author | Jim Mattson <jmattson@google.com> | 2016-12-20 16:34:50 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-14 13:32:55 +0200 |
commit | 00ea718b113ab15c4f4116703b8b5f65c15db4c2 (patch) | |
tree | dd2aba342a9b0b2030ed3bd52810e26e0a805f75 /arch | |
parent | 75343cf52fd5ee9e213cf2e681dcb4c3ca07d573 (diff) |
Revert "KVM: nested VMX: disable perf cpuid reporting"
commit 0b4c208d443ba2af82b4c70f99ca8df31e9a0020 upstream.
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@google.com>
[The issue solved by bc6134942dbb has been resolved with ff651cb613b4
("KVM: nVMX: Add nested msr load/restore algorithm").]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/kvm/cpuid.c | 6 | ||||
-rw-r--r-- | arch/x86/kvm/vmx.c | 2 |
2 files changed, 0 insertions, 8 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 2e1fd586b895..642e9c93a097 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -818,12 +818,6 @@ 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 0a472e9865c5..cc87b1633894 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7754,8 +7754,6 @@ 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); |