From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Schopp Subject: [PATCH] x86: svm: make wbinvd faster Date: Fri, 27 Feb 2015 18:19:18 -0600 Message-ID: <20150228001917.15247.41063.stgit@joelvmguard2.amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: David Kaplan , David Kaplan , , Joerg Roedel , Marcelo Tosatti , , Borislav Petkov To: Gleb Natapov , Paolo Bonzini , Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org From: David Kaplan No need to re-decode WBINVD since we know what it is from the intercept. Signed-off-by: David Kaplan [extracted from larger unlrelated patch, forward ported, tested] Signed-off-by: Joel Schopp --- arch/x86/kvm/svm.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d319e0c..86ecd21 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2776,6 +2776,14 @@ static int skinit_interception(struct vcpu_svm *svm) return 1; } +static int wbinvd_interception(struct vcpu_svm *svm) +{ + kvm_emulate_wbinvd(&svm->vcpu); + skip_emulated_instruction(&svm->vcpu); + return 1; +} + + static int xsetbv_interception(struct vcpu_svm *svm) { u64 new_bv = kvm_read_edx_eax(&svm->vcpu); @@ -3376,7 +3384,7 @@ 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,