On 7/12/2019 11:13 PM, Sean Christopherson wrote:
On Fri, Jul 12, 2019 at 04:29:05PM +0800, Tao Xu wrote:
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 46af3a5e9209..a4d5da34b306 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2048,6 +2048,7 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx,
struct vmcs12 *vmcs12)
SECONDARY_EXEC_ENABLE_INVPCID |
SECONDARY_EXEC_RDTSCP |
SECONDARY_EXEC_XSAVES |
+ SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE |
SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
SECONDARY_EXEC_APIC_REGISTER_VIRT |
SECONDARY_EXEC_ENABLE_VMFUNC);
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index d98eac371c0a..f411c9ae5589 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2247,6 +2247,7 @@ static __init int setup_vmcs_config(struct vmcs_config
*vmcs_conf,
SECONDARY_EXEC_RDRAND_EXITING |
SECONDARY_EXEC_ENABLE_PML |
SECONDARY_EXEC_TSC_SCALING |
+ SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE |
SECONDARY_EXEC_PT_USE_GPA |
SECONDARY_EXEC_PT_CONCEAL_VMX |
SECONDARY_EXEC_ENABLE_VMFUNC |
@@ -3984,6 +3985,25 @@ static void vmx_compute_secondary_exec_control(struct
vcpu_vmx *vmx)
}
}
+ if (vmcs_config.cpu_based_2nd_exec_ctrl &
+ SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE) {
This should be aligned with the beginning of the conditional.
Alternatively, add a vmx_waitpkg_supported() helper, which is fairly
ubiquitous even when there is only a single call site.
OK, Thank you for your suggestion.
+ /* Exposing WAITPKG only when WAITPKG is exposed */
No need for this comment. It's also oddly worded, e.g. the second
"exposed" should probably be "enabled"?
+ bool waitpkg_enabled =
+ guest_cpuid_has(vcpu, X86_FEATURE_WAITPKG);
+
+ if (!waitpkg_enabled)
+ exec_control &= ~SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE;
+
+ if (nested) {
+ if (waitpkg_enabled)
+ vmx->nested.msrs.secondary_ctls_high |=
+ SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE;
+ else
+ vmx->nested.msrs.secondary_ctls_high &=
+ ~SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE;
+ }
+ }
+
vmx->secondary_exec_control = exec_control;
}
--
2.20.1
