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authorGleb Natapov <gleb@redhat.com>2009-08-27 18:41:30 +0300
committerAvi Kivity <avi@redhat.com>2009-09-10 10:46:57 +0300
commit5fff7d270bd6a4759b6d663741b729cdee370257 (patch)
tree9d80d9aa7e949a60488f9d16145e7054fc0d9968 /arch/x86
parent60f24784a92c25c269a5e741a8ce8ff63e887be8 (diff)
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kvm/vmx.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 1ee811cef23..eec04129402 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);
}