diff options
| author | Jim Mattson <jmattson@google.com> | 2016-12-20 16:34:50 -0800 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-13 09:29:19 -0400 |
| commit | 4736ccc83dfca59e589eae8c183ecd0d579e75a2 (patch) | |
| tree | eee5916cfc6fae655299da3446e630970696f6c0 /arch | |
| parent | 7a07dbb8c25c3a9c2d9461d22faf38436c160239 (diff) | |
Revert "KVM: nested VMX: disable perf cpuid reporting"
[ Upstream commit 0b4c208d443ba2af82b4c70f99ca8df31e9a0020 ]
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: Sasha Levin <alexander.levin@verizon.com>
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 090aa5c1d6b1..fb58766eabc1 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -811,12 +811,6 @@ 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 f5c6f74f85a3..c1534af627fb 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7540,8 +7540,6 @@ 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); |