From nobody Thu May 2 15:41:59 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1623665518; cv=none; d=zohomail.com; s=zohoarc; b=PNjySJKRoeEukmo2IClWiOD3Mk/wbz3DFDXXFmYmtuXKf2CKDCUvc9B375ctU9dmHVa4BX9FFtwsIZJr1KMmZQjfN/C9KIF4M+02M4oWUtFad1pTBx3RaO1yTvG3CPQgrkFy7Zneciv5ELF/CEiUGbuv96OOomvHOQWIENcK9Y0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1623665518; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ObF/ZgQFN9zjCXfOIGIVn098TNV5d0DYaS9kaxO+1to=; b=YK00KahREmzBK8WWXz5ksA5fpdHz5b03qyDMftTxWcgKAvq1ZugnHXiV2d11mkjbG1yr9PG0EPqThg+sUsz6wsp7jRssgrjrf6RaHwh7ok/nMsP6b+z1c+mqStgdxnbg4hkuZXAt8kQ0V/PvQUu/tHoLTrjku8HoABk8dy1u4M0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1623665518673226.1010530907473; Mon, 14 Jun 2021 03:11:58 -0700 (PDT) Received: from localhost ([::1]:51018 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsjZV-0001Vk-JU for importer2@patchew.org; Mon, 14 Jun 2021 06:11:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33466) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsjWt-00059W-Hc for qemu-devel@nongnu.org; Mon, 14 Jun 2021 06:09:15 -0400 Received: from mail-wm1-x332.google.com ([2a00:1450:4864:20::332]:35414) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lsjWr-000447-MJ for qemu-devel@nongnu.org; Mon, 14 Jun 2021 06:09:15 -0400 Received: by mail-wm1-x332.google.com with SMTP id k5-20020a05600c1c85b02901affeec3ef8so12663529wms.0 for ; Mon, 14 Jun 2021 03:09:13 -0700 (PDT) Received: from localhost.localdomain ([37.161.140.231]) by smtp.gmail.com with ESMTPSA id o18sm15752254wrx.59.2021.06.14.03.09.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 03:09:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ObF/ZgQFN9zjCXfOIGIVn098TNV5d0DYaS9kaxO+1to=; b=ULJSpRtTNUwssCXmGNd1POehg/U2jddkGHHwi2fhasQfp/Qye7fAsBZSf69vxI/9bx suEZsYZQ9UwN64/tb1dAH75uCztnWLvOX40gZcW7nDnMTXAuPMmfxINbh14VaAd0easc 8ynayXdbFaZW+CCRYxyiMLFbpO4v5wjOgOrDUJ9T3XRWiFysHazv1Q+xYxg9zfB324rm +D8GRyeALPlhXVgATIGQRqyXRPQau6sc56kL1nwN69DrFfER8WhqCz3q6IsmlKsn6qYB JIdujP0ODEKmeWaxAYp7AAvuvQkKLqHdu4C8dRpgzj8zeuS2qxOZIzt0a9hal3i/46I3 S4Pw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ObF/ZgQFN9zjCXfOIGIVn098TNV5d0DYaS9kaxO+1to=; b=P806hqR5Ucwfwk8N7y6tWzOf/jaoViQvBppjiUHgWG+f5Ri+ig9s+coujAcR7/Q1gZ Bf0TKo0EiFFnnQ3RCjE1f5VEtJthwQH/cil0WR9K5xHiMA6XIIthKBm8tU3nOPZASMS7 h6ymlsB+eI1mC/6Qq4XdrUsC1WyjmJzsYT1ky7L6ruPqdE90xiaSiYPYbA7bvg3b407c HCvA6GjPLdrRCua0Kj1eKMZL2cXM1zXieXeIZfNNtKSKzcmKBUyCVH9qRcXPkgqoVpDE 3E92xn6ZxbRQUwmadtBXhSQ45hELDcGuRH405WCKHxUpvl5+txbYfdysRE1gRw+13xcA /bqg== X-Gm-Message-State: AOAM533g0U82RPK2GNWEuYrC3pvSu4lUHwT3mvKT+RI8Z9TUgfjrzMs9 ecpl4JwAOsAIDwUkB6+ixHscXba4tfCf5A== X-Google-Smtp-Source: ABdhPJylDOhDCBqwgp5cRayYcD1KVqcKrNtZqBehWALAij0sI+N4/cXiWxFKxyIzQqZlA+m1s3lgmA== X-Received: by 2002:a1c:2142:: with SMTP id h63mr15926613wmh.84.1623665352262; Mon, 14 Jun 2021 03:09:12 -0700 (PDT) From: Lara Lazier To: qemu-devel@nongnu.org Subject: [PATCH 1/3] target/i386: Added consistency checks for VMRUN intercept and ASID Date: Mon, 14 Jun 2021 12:09:00 +0200 Message-Id: <20210614100902.15860-2-laramglazier@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210614100902.15860-1-laramglazier@gmail.com> References: <20210614100902.15860-1-laramglazier@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::332; envelope-from=laramglazier@gmail.com; helo=mail-wm1-x332.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lara Lazier Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) Content-Type: text/plain; charset="utf-8" Zero VMRUN intercept and ASID should cause an immediate VMEXIT during the consistency checks performed by VMRUN. (AMD64 Architecture Programmer's Manual, V2, 15.5) Signed-off-by: Lara Lazier --- target/i386/svm.h | 2 ++ target/i386/tcg/sysemu/svm_helper.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/target/i386/svm.h b/target/i386/svm.h index 87965e5bc2..1c55d4f829 100644 --- a/target/i386/svm.h +++ b/target/i386/svm.h @@ -135,6 +135,8 @@ #define SVM_NPTEXIT_GPA (1ULL << 32) #define SVM_NPTEXIT_GPT (1ULL << 33) =20 +#define SVM_VMRUN_INTERCEPT (1ULL << 32) + struct QEMU_PACKED vmcb_control_area { uint16_t intercept_cr_read; uint16_t intercept_cr_write; diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/s= vm_helper.c index 9d671297cf..ff826fe11a 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -72,6 +72,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_e= ip_addend) uint64_t nested_ctl; uint32_t event_inj; uint32_t int_ctl; + uint32_t asid; =20 cpu_svm_check_intercept_param(env, SVM_EXIT_VMRUN, 0, GETPC()); =20 @@ -154,9 +155,18 @@ void helper_vmrun(CPUX86State *env, int aflag, int nex= t_eip_addend) =20 nested_ctl =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.nested_c= tl)); + asid =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, + control.asid)); =20 env->nested_pg_mode =3D 0; =20 + if (!(env->intercept & SVM_VMRUN_INTERCEPT)) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + if (asid =3D=3D 0) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + if (nested_ctl & SVM_NPT_ENABLED) { env->nested_cr3 =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, --=20 2.25.1 From nobody Thu May 2 15:41:59 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1623665603; cv=none; d=zohomail.com; s=zohoarc; b=YiM5BSOtUP8AVEa+NZFybFq+rP4wJMGsSg4HNf+LyxBnElBIZ8jMKrcvVOfllCfBekRk6O1tb9zy390JUXlQYm6rEzHv+wxwW5Dn5Xn02CiHHMi0jBvYouCzUrOclDi6RgRDFWrI2wBMJX1Oqb8ZL88lhQsLrmYtzO7A2pldeeY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1623665603; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=zPNUcRYgGmr4VMYBANGO9WVeq5kpBLoCHc6KvmEV1vU=; b=FU3phty+pZuoXHHhOlut5d/mTicfsMgKukdUOCFS+rkuR15QfgYN6xUTaqPMeiiuKFFk9KbGD3DPiWi8IwqiTQThohf3+QIU5uUVvTWvUHgk5CTkJ3f6tO1dtyIBamzOCocfFMuTkGj8v1H/QMqpRmP9UaBadLdoCtVV1sQIcPk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1623665603689371.6785857172914; Mon, 14 Jun 2021 03:13:23 -0700 (PDT) Received: from localhost ([::1]:53104 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsjas-0002xe-Mg for importer2@patchew.org; Mon, 14 Jun 2021 06:13:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33482) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsjWx-0005C7-25 for qemu-devel@nongnu.org; Mon, 14 Jun 2021 06:09:19 -0400 Received: from mail-wm1-x329.google.com ([2a00:1450:4864:20::329]:46743) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lsjWs-00044b-I3 for qemu-devel@nongnu.org; Mon, 14 Jun 2021 06:09:18 -0400 Received: by mail-wm1-x329.google.com with SMTP id h22-20020a05600c3516b02901a826f84095so12428412wmq.5 for ; Mon, 14 Jun 2021 03:09:13 -0700 (PDT) Received: from localhost.localdomain ([37.161.140.231]) by smtp.gmail.com with ESMTPSA id o18sm15752254wrx.59.2021.06.14.03.09.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 03:09:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=zPNUcRYgGmr4VMYBANGO9WVeq5kpBLoCHc6KvmEV1vU=; b=vdkhOFgy1Lv8rKJXH/BcucMpo4oYe0ZFQ5MzzwKMfqR053bRWEdl6pY6g73JUd0sfW Dy4Slx3m1efIbjPvHXT1mDjq8VAyNKpfOj6dP/bsEaJ6gg7ocYWd/3kUs+LIS7VYqhJR 6dU4JENn6f9ldUgaYZ+qYQ/18cCbXhCGDSnMdXfdgxeUSufEb7/2CeLlkPrRao7XW3G8 FVKgVUbm5wt1ycpVJ0HWsb7KfLRxfBEB3yYd6rwnGOmW+1Ugw4x4wXoFecLG3Miv9evt /CqupthVxwKkZgAGeKZ85AbHXsdm96IV0ZyP9tq+jdKs0gRrqy3SxKFcACQzRQAA95Fx USPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=zPNUcRYgGmr4VMYBANGO9WVeq5kpBLoCHc6KvmEV1vU=; b=Pb0nz9JBIqPWhOJ5m47KKXeFrSsvQv7NGk5hqOJeOqLOSG47BAICkA6npZxeEHCZqM XNY7KieOKCNbmOuS/erng+na79o/pcxhOd5LgUr++9lT0q+09GPAYcaAgKH7eVbjV6Qx +8MXx/1C+Z0j0JO99mmehXdggOcyGaABvp6FWzHFhVLTpozGp0T06wgBY6OKdYrZOqis nooQwqRQaF5OuKaIB8Oid1JrVubQPBGQ7qINeLiUrwXImopz2XfOM21rZMLDlRgksT2X igD3GMUY8m9rKt08saEvGpJgMQ/kcjZvbYHd3tCAPGRHLu87Wm1gUgNApwKLJFF29+CI XZ3Q== X-Gm-Message-State: AOAM533741QI6AEXj5SYptllkHRl3T7YtZAuV5HRigHfKxFH0YxXuEvH 70OF6guloSENiTmdmx/lhFXNAn7fP1cUIg== X-Google-Smtp-Source: ABdhPJwdRNi5m+d3EKW7f/oXht0JJn/vVLMK1QP/qw6RRQQYg8eriFSiPHCwVAyA5MG/ktWP7V1mcw== X-Received: by 2002:a05:600c:a45:: with SMTP id c5mr14769379wmq.153.1623665353098; Mon, 14 Jun 2021 03:09:13 -0700 (PDT) From: Lara Lazier To: qemu-devel@nongnu.org Subject: [PATCH 2/3] target/i386: Added consistency checks for CR0 Date: Mon, 14 Jun 2021 12:09:01 +0200 Message-Id: <20210614100902.15860-3-laramglazier@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210614100902.15860-1-laramglazier@gmail.com> References: <20210614100902.15860-1-laramglazier@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::329; envelope-from=laramglazier@gmail.com; helo=mail-wm1-x329.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lara Lazier Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) Content-Type: text/plain; charset="utf-8" The combination of unset CD and set NW bit in CR0 is illegal. CR0[63:32] are also reserved and need to be zero. (AMD64 Architecture Programmer's Manual, V2, 15.5) Signed-off-by: Lara Lazier --- target/i386/cpu.h | 2 ++ target/i386/svm.h | 1 + target/i386/tcg/sysemu/svm_helper.c | 12 +++++++++--- 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index ac3abea97c..46542513cc 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -224,6 +224,8 @@ typedef enum X86Seg { #define CR0_NE_MASK (1U << 5) #define CR0_WP_MASK (1U << 16) #define CR0_AM_MASK (1U << 18) +#define CR0_NW_MASK (1U << 29) +#define CR0_CD_MASK (1U << 30) #define CR0_PG_MASK (1U << 31) =20 #define CR4_VME_MASK (1U << 0) diff --git a/target/i386/svm.h b/target/i386/svm.h index 1c55d4f829..7a88906907 100644 --- a/target/i386/svm.h +++ b/target/i386/svm.h @@ -136,6 +136,7 @@ #define SVM_NPTEXIT_GPT (1ULL << 33) =20 #define SVM_VMRUN_INTERCEPT (1ULL << 32) +#define SVM_CR0_RESERVED_MASK 0xffffffff00000000U =20 struct QEMU_PACKED vmcb_control_area { uint16_t intercept_cr_read; diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/s= vm_helper.c index ff826fe11a..63aaa53490 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -73,6 +73,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_e= ip_addend) uint32_t event_inj; uint32_t int_ctl; uint32_t asid; + uint64_t new_cr0; =20 cpu_svm_check_intercept_param(env, SVM_EXIT_VMRUN, 0, GETPC()); =20 @@ -192,13 +193,18 @@ void helper_vmrun(CPUX86State *env, int aflag, int ne= xt_eip_addend) env->idt.limit =3D x86_ldl_phys(cs, env->vm_vmcb + offsetof(struct vmc= b, save.idtr.limit)); =20 + new_cr0 =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save= .cr0)); + if (new_cr0 & SVM_CR0_RESERVED_MASK) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + if ((new_cr0 & CR0_NW_MASK) && !(new_cr0 & CR0_CD_MASK)) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } /* clear exit_info_2 so we behave like the real hardware */ x86_stq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.exit_info_2), 0); =20 - cpu_x86_update_cr0(env, x86_ldq_phys(cs, - env->vm_vmcb + offsetof(struct vmcb, - save.cr0))); + cpu_x86_update_cr0(env, new_cr0); cpu_x86_update_cr4(env, x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save.cr4))); --=20 2.25.1 From nobody Thu May 2 15:41:59 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1623665465; cv=none; d=zohomail.com; s=zohoarc; b=H/qAP7E5ZU8kfHCiVzCCPEUjSpG7A+1vreMXebhZwL1MDVDlCPpxuebxZj0kLbWIN4q5dIyPut3vCtd7QxoCunSCEuAebin3hUgA24u7LyQrkq4jLLOl1hvzmDkwYP9tncmjJksU2en30GMRJkj5/o5cHdwVyJOtkqaHpk6TtUg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1623665465; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=OV+M6Wxiaq+SA1gePBokthLze/Zk2s945FpGBYhPwpU=; b=BdA6cHWc4YZEGxraSBr5FqbyghkJvysYT3/22WTlqzC9zEtu6iiMyE9p0PkVZYWd5bGFX+EPh2874BCrCjKaTn7U2/tAsylMowPAdEzeDMoS1Qf/GP3Po83XYKC3wUsA08J66KnbEUXWmJ8/N7HKaQaLcitaEBBoi+6blfAa3Mo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1623665465152133.55681947072128; Mon, 14 Jun 2021 03:11:05 -0700 (PDT) Received: from localhost ([::1]:46960 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsjYd-0007C6-UT for importer2@patchew.org; Mon, 14 Jun 2021 06:11:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33476) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsjWw-0005Aw-3h for qemu-devel@nongnu.org; Mon, 14 Jun 2021 06:09:18 -0400 Received: from mail-wr1-x430.google.com ([2a00:1450:4864:20::430]:35368) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lsjWt-00045B-5c for qemu-devel@nongnu.org; Mon, 14 Jun 2021 06:09:17 -0400 Received: by mail-wr1-x430.google.com with SMTP id m18so13896640wrv.2 for ; Mon, 14 Jun 2021 03:09:14 -0700 (PDT) Received: from localhost.localdomain ([37.161.140.231]) by smtp.gmail.com with ESMTPSA id o18sm15752254wrx.59.2021.06.14.03.09.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 03:09:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=OV+M6Wxiaq+SA1gePBokthLze/Zk2s945FpGBYhPwpU=; b=uV8I57a8ZZ380ULjk7FNIPQO+AAu/Kir5vcccUZpH42IKdFyngogNpvFgcV3V40H8b 2KvKYNIzIAHsNEQktwmwL9SRrldRTd77XGE2Rbjvl/YLM+BTdLpFUfdBC4JRPF+PJaOY pRsOfyaCUy8Z+svZSwiThP1SGz4rmWKkdvEVEk2aK2LBI9FghOKcvFfVitWTlaY08jYd vKwUVbJc6p2qYJJRXR5YUkivyUVKbsZsrynkRPE0Dfcvs3bG/niYecxqlnRBWYRE07Uz Ea7kqX52FEUXvHEfaapX/Hn2svFlm22tfj/JfhNAo0srHZJ99Ow3QvXXKsjzIyJ77ZVA wyzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=OV+M6Wxiaq+SA1gePBokthLze/Zk2s945FpGBYhPwpU=; b=Bep82qqVjCK6vU5DEfi0nn+RxQdZQG4S6Z6ekOp0f2RMAituvemdtW5NLEIWRAZHvw Dna0i16U4WUZD2C2gWgSGZ1lwTMqLpwNow58CquibmA4AVzHohgVo3aPdU+XAKMt2O37 ihiS34Cmi9hLEjyEhRRY47e0FUEa0Wbb4RSvIzGdK4vjjCiXRb8bJ86HUsh0L7xYX4Pg oJHBJUMXuzNrDlrhm+ALH7/N9hUW0T4QDbpt4mXm9uLRVrl21kgLWMKmNcomcAoN7tfU n2tRye9BqU0XmGMDmAJ3bQiPnNlE5gFTx1YskZ2R5hzOrp6jlnkB8mZRvhAjoGS1PkT5 GhRA== X-Gm-Message-State: AOAM532HBSXjyosgJsp1EBCPxIkGFquy3/VcoleVynRth99vYhRSAm6e Yhdn0XFH09dOcD2tGtWZpXUykLPU8OtNlg== X-Google-Smtp-Source: ABdhPJx7DGzLKJxXGEvu22cswa6QLFTUmSLojbRAZ+OgbRSvgTPlz+O66a2Tk5BEl0JwNvhNPSFVzA== X-Received: by 2002:adf:fd0c:: with SMTP id e12mr17572499wrr.265.1623665353906; Mon, 14 Jun 2021 03:09:13 -0700 (PDT) From: Lara Lazier To: qemu-devel@nongnu.org Subject: [PATCH 3/3] target/i386: Added Intercept CR0 writes check Date: Mon, 14 Jun 2021 12:09:02 +0200 Message-Id: <20210614100902.15860-4-laramglazier@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210614100902.15860-1-laramglazier@gmail.com> References: <20210614100902.15860-1-laramglazier@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::430; envelope-from=laramglazier@gmail.com; helo=mail-wr1-x430.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lara Lazier Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) Content-Type: text/plain; charset="utf-8" When the selective CR0 write intercept is set, all writes to bits in CR0 other than CR0.TS or CR0.MP cause a VMEXIT. Signed-off-by: Lara Lazier --- target/i386/cpu.h | 2 ++ target/i386/tcg/sysemu/misc_helper.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 46542513cc..ff0ff97ca9 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -228,6 +228,8 @@ typedef enum X86Seg { #define CR0_CD_MASK (1U << 30) #define CR0_PG_MASK (1U << 31) =20 +#define INTERCEPT_SELECTIVE_CR0 (1ULL << 5) + #define CR4_VME_MASK (1U << 0) #define CR4_PVI_MASK (1U << 1) #define CR4_TSD_MASK (1U << 2) diff --git a/target/i386/tcg/sysemu/misc_helper.c b/target/i386/tcg/sysemu/= misc_helper.c index 0cef2f1a4c..53117f47de 100644 --- a/target/i386/tcg/sysemu/misc_helper.c +++ b/target/i386/tcg/sysemu/misc_helper.c @@ -84,6 +84,15 @@ void helper_write_crN(CPUX86State *env, int reg, target_= ulong t0) { switch (reg) { case 0: + /* + * If we reach this point, the CR0 write intercept is disabled. + * But we could still exit if the hypervisor has requested the sele= ctive + * intercept for bits other than TS and MP + */ + if ((env->intercept & INTERCEPT_SELECTIVE_CR0) && + ((env->cr[0] ^ t0) & ~(CR0_TS_MASK | CR0_MP_MASK))) { + cpu_vmexit(env, SVM_EXIT_CR0_SEL_WRITE, 0, GETPC()); + } cpu_x86_update_cr0(env, t0); break; case 3: --=20 2.25.1