diff mbox

[v3,2/2] x86: svm: make wbinvd faster

Message ID 20150302194337.2121.39107.stgit@joelvmguard2.amd.com (mailing list archive)
State New, archived
Headers show

Commit Message

Joel Schopp March 2, 2015, 7:43 p.m. UTC 
From: David Kaplan <David.Kaplan@amd.com>

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>
---
 arch/x86/kvm/svm.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)


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Comments

Radim Krčmář March 3, 2015, 4:52 p.m. UTC | #1 
2015-03-02 13:43-0600, Joel Schopp:
> From: David Kaplan <David.Kaplan@amd.com>
> 
> 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 Kr?má? <rkrcmar@redhat.com>

Thanks.
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diff mbox

Patch

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 0c9e377..6fa4222 100644
--- 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);
@@ -3374,7 +3380,7 @@  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,