diff options
| author | Gleb Natapov <gleb@redhat.com> | 2009-08-27 15:41:30 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 07:46:57 (GMT) |
| commit | 5fff7d270bd6a4759b6d663741b729cdee370257 (patch) | |
| tree | 9d80d9aa7e949a60488f9d16145e7054fc0d9968 | |
| parent | 60f24784a92c25c269a5e741a8ce8ff63e887be8 (diff) | |
| download | linux-5fff7d270bd6a4759b6d663741b729cdee370257.tar.xz | |
KVM: VMX: Fix cr8 exiting control clobbering by EPT
Don't call adjust_vmx_controls() two times for the same control.
It restores options that were dropped earlier. This loses us the cr8
exit control, which causes a massive performance regression Windows x64.
Cc: stable@kernel.org
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 1ee811c..eec0412 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1262,12 +1262,9 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { /* CR3 accesses and invlpg don't need to cause VM Exits when EPT enabled */ - min &= ~(CPU_BASED_CR3_LOAD_EXITING | - CPU_BASED_CR3_STORE_EXITING | - CPU_BASED_INVLPG_EXITING); - if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, - &_cpu_based_exec_control) < 0) - return -EIO; + _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | + CPU_BASED_CR3_STORE_EXITING | + CPU_BASED_INVLPG_EXITING); rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, vmx_capability.ept, vmx_capability.vpid); } |