From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759329AbYAAPvs (ORCPT ); Tue, 1 Jan 2008 10:51:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755532AbYAAPhE (ORCPT ); Tue, 1 Jan 2008 10:37:04 -0500 Received: from il.qumranet.com ([82.166.9.18]:33787 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755261AbYAAPgc (ORCPT ); Tue, 1 Jan 2008 10:36:32 -0500 From: Avi Kivity To: linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net Cc: Joerg Roedel Subject: [PATCH 52/54] KVM: SVM: Exit to userspace if write to cr8 and not using in-kernel apic Date: Tue, 1 Jan 2008 17:36:18 +0200 Message-Id: <1199201780-14001-53-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1199201780-14001-1-git-send-email-avi@qumranet.com> References: <1199201780-14001-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel With this patch KVM on SVM will exit to userspace if the guest writes to CR8 and the in-kernel APIC is disabled. Signed-off-by: Joerg Roedel Signed-off-by: Markus Rechberger Signed-off-by: Avi Kivity --- drivers/kvm/svm.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-) diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 677b525..9f8564a 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -1048,6 +1048,15 @@ static int emulate_on_interception(struct vcpu_svm *svm, return 1; } +static int cr8_write_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) +{ + emulate_instruction(&svm->vcpu, NULL, 0, 0, 0); + if (irqchip_in_kernel(svm->vcpu.kvm)) + return 1; + kvm_run->exit_reason = KVM_EXIT_SET_TPR; + return 0; +} + static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) { struct vcpu_svm *svm = to_svm(vcpu); @@ -1202,7 +1211,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm, [SVM_EXIT_WRITE_CR0] = emulate_on_interception, [SVM_EXIT_WRITE_CR3] = emulate_on_interception, [SVM_EXIT_WRITE_CR4] = emulate_on_interception, - [SVM_EXIT_WRITE_CR8] = emulate_on_interception, + [SVM_EXIT_WRITE_CR8] = cr8_write_interception, [SVM_EXIT_READ_DR0] = emulate_on_interception, [SVM_EXIT_READ_DR1] = emulate_on_interception, [SVM_EXIT_READ_DR2] = emulate_on_interception, -- 1.5.3.7