kvm: svm: make wbinvd faster

No need to re-decode WBINVD since we know what it is from the intercept.

Signed-off-by: David Kaplan <David.Kaplan@amd.com>
[extracted from larger unlrelated patch, forward ported, tested,style cleanup]
Signed-off-by: Joel Schopp <joel.schopp@amd.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 16d6e5c..8f66585 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2774,6 +2774,12 @@ static int skinit_interception(struct vcpu_svm *svm)
        return 1;
 }
 
+static int wbinvd_interception(struct vcpu_svm *svm)
+{
+       kvm_emulate_wbinvd(&svm->vcpu);
+       return 1;
+}
+
 static int xsetbv_interception(struct vcpu_svm *svm)
 {
        u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
@@ -3373,7 +3379,7 @@ static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
        [SVM_EXIT_STGI]                         = stgi_interception,
        [SVM_EXIT_CLGI]                         = clgi_interception,
        [SVM_EXIT_SKINIT]                       = skinit_interception,
-       [SVM_EXIT_WBINVD]                       = emulate_on_interception,
+       [SVM_EXIT_WBINVD]                       = wbinvd_interception,
        [SVM_EXIT_MONITOR]                      = monitor_interception,
        [SVM_EXIT_MWAIT]                        = mwait_interception,
        [SVM_EXIT_XSETBV]                       = xsetbv_interception,