From patchwork Mon Dec 7 20:45:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Adalbert_Laz=C4=83r?= X-Patchwork-Id: 11956679 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B392C4167B for ; Mon, 7 Dec 2020 20:47:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D0AB7238EC for ; Mon, 7 Dec 2020 20:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727107AbgLGUrx (ORCPT ); Mon, 7 Dec 2020 15:47:53 -0500 Received: from mx01.bbu.dsd.mx.bitdefender.com ([91.199.104.161]:42560 "EHLO mx01.bbu.dsd.mx.bitdefender.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727057AbgLGUrw (ORCPT ); Mon, 7 Dec 2020 15:47:52 -0500 Received: from smtp.bitdefender.com (smtp01.buh.bitdefender.com [10.17.80.75]) by mx01.bbu.dsd.mx.bitdefender.com (Postfix) with ESMTPS id 4E9D0305D508; Mon, 7 Dec 2020 22:46:14 +0200 (EET) Received: from localhost.localdomain (unknown [91.199.104.27]) by smtp.bitdefender.com (Postfix) with ESMTPSA id 2DB173072785; Mon, 7 Dec 2020 22:46:14 +0200 (EET) From: =?utf-8?q?Adalbert_Laz=C4=83r?= To: kvm@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, Paolo Bonzini , =?utf-8?b?TmljdciZb3IgQ8OuyJt1?= , =?utf-8?q?Adalbert?= =?utf-8?q?_Laz=C4=83r?= Subject: [PATCH v11 15/81] KVM: x86: add kvm_x86_ops.msr_write_intercepted() Date: Mon, 7 Dec 2020 22:45:16 +0200 Message-Id: <20201207204622.15258-16-alazar@bitdefender.com> In-Reply-To: <20201207204622.15258-1-alazar@bitdefender.com> References: <20201207204622.15258-1-alazar@bitdefender.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Nicușor Cîțu This function will be used to check if the write access for a specific MSR is already intercepted. The information will be used to restore the interception status when the introspection tool is no longer interested in that MSR. Signed-off-by: Nicușor Cîțu Signed-off-by: Adalbert Lazăr --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/svm/svm.c | 1 + arch/x86/kvm/vmx/vmx.c | 1 + 3 files changed, 3 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 0e9144e23ce6..5236008d231f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1112,6 +1112,7 @@ struct kvm_x86_ops { void (*update_exception_bitmap)(struct kvm_vcpu *vcpu); int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); + bool (*msr_write_intercepted)(struct kvm_vcpu *vcpu, u32 msr); u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); void (*get_segment)(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 86f0dcf9fecd..4478942f10a5 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -4304,6 +4304,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = { .get_msr_feature = svm_get_msr_feature, .get_msr = svm_get_msr, .set_msr = svm_set_msr, + .msr_write_intercepted = msr_write_intercepted, .get_segment_base = svm_get_segment_base, .get_segment = svm_get_segment, .set_segment = svm_set_segment, diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 5bd6a4add27e..d4833d3bf966 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7658,6 +7658,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = { .get_msr_feature = vmx_get_msr_feature, .get_msr = vmx_get_msr, .set_msr = vmx_set_msr, + .msr_write_intercepted = msr_write_intercepted, .get_segment_base = vmx_get_segment_base, .get_segment = vmx_get_segment, .set_segment = vmx_set_segment,