From nobody Mon Feb 9 17:59:32 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1625759075441734.1930136044464; Thu, 8 Jul 2021 08:44:35 -0700 (PDT) Received: from localhost ([::1]:48438 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m1WCX-000594-2l for importer@patchew.org; Thu, 08 Jul 2021 11:44:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54000) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m1VnA-000198-QX for qemu-devel@nongnu.org; Thu, 08 Jul 2021 11:18:21 -0400 Received: from mail-ej1-x632.google.com ([2a00:1450:4864:20::632]:45658) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m1Vn8-0008KO-P1 for qemu-devel@nongnu.org; Thu, 08 Jul 2021 11:18:20 -0400 Received: by mail-ej1-x632.google.com with SMTP id hc16so10254123ejc.12 for ; Thu, 08 Jul 2021 08:18:18 -0700 (PDT) Received: from avogadro.lan ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id ak16sm1103694ejc.17.2021.07.08.08.18.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jul 2021 08:18:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=T3FgzYC2xuHjCE/ambPxsRjySSaIwBV2XzEZCQs8ny8=; b=LoG8LbNuQsuk+L7eXL/isBDNTALy9DyUcExePzFZLYi/gdR2mRMf0iSJWIFREHF9w9 r3JkHKnioixk206LBnvr5KKS9tFcGc/A2+cH7vVZQy7cjLAv+ZlAhD9NzC/qyENDQO5n jqxqWUUp/rnpQApKUyJo34mV0mR2Is3JJQ91E7Jbmos3+dO8ALOV2Y+rB3A6rBCOQlqo fB+StdoZ3v9XAg8ksEaOSkv74AaGHpIFbXHe4OxQ45v54OHKx0Vu9//JqYhOl4j1rwwK PlRDYtAZGSx12tXQ5RBz28zPgDKdWVe+R3knV/lYXDPNyWc+yPkzDHQu9VaAeQdajDMm YefQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=T3FgzYC2xuHjCE/ambPxsRjySSaIwBV2XzEZCQs8ny8=; b=Xccvff4W5vu2DdC5DldvJGP7OIA6vcZtd39w1kI1j39KXHqgyGMdFR1GUJzcGDCwR3 wugeOG182ByhQDNmA4LqYZXLVSTkMVCyz7j4C0xdGS/ZWgWJ9qVVhGz7n6FLBJtlRClL fDAySXS5idZbysnHxl3HhOidVInXfvXfG6L01fixDd3OK4ST+kzREcsKVfN2a/4wf0pd +pgkhL9efiDT855fxvmLNDmd0b3D3OOKHi7bC41Fcfkj2E1/jkkqtVwkq+M4gTfaq3d/ 4plAV9uIWVA1xYJcabfnlmF/X5xIO+mygaUg5uO95l6Y2mkq8lUMT4LvTfH0v5g5McE2 /9XQ== X-Gm-Message-State: AOAM5329jKpHoxWgwD6/m4dPa9Htv86w7Gr+lje20zg8FF3DpGjRUNNY SmlGKFumAPqQlk6TTW7oZpiKJL+ik5k= X-Google-Smtp-Source: ABdhPJyWmBGZ4cg5IcU1H3fdtdgeOiswPS+gPUoff1FVOi9+DPfDkRsT36Ch5cPzEnZfphzpaPskag== X-Received: by 2002:a17:906:1dd2:: with SMTP id v18mr22745341ejh.322.1625757497498; Thu, 08 Jul 2021 08:18:17 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 39/48] target/i386: Added MSRPM and IOPM size check Date: Thu, 8 Jul 2021 17:17:39 +0200 Message-Id: <20210708151748.408754-40-pbonzini@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210708151748.408754-1-pbonzini@redhat.com> References: <20210708151748.408754-1-pbonzini@redhat.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+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::632; envelope-from=paolo.bonzini@gmail.com; helo=mail-ej1-x632.google.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1625759076388100001 Content-Type: text/plain; charset="utf-8" From: Lara Lazier The address of the last entry in the MSRPM and in the IOPM must be smaller than the largest physical address. (APM2 15.10-15.11) Signed-off-by: Lara Lazier Message-Id: <20210705081802.18960-2-laramglazier@gmail.com> Signed-off-by: Paolo Bonzini --- target/i386/svm.h | 3 +++ target/i386/tcg/sysemu/svm_helper.c | 15 +++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/target/i386/svm.h b/target/i386/svm.h index 5098733053..adc058dc76 100644 --- a/target/i386/svm.h +++ b/target/i386/svm.h @@ -137,6 +137,9 @@ =20 #define SVM_CR0_RESERVED_MASK 0xffffffff00000000U =20 +#define SVM_MSRPM_SIZE (1ULL << 13) +#define SVM_IOPM_SIZE ((1ULL << 13) + 1) + 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 1c2dbc1862..fa701829e5 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -68,6 +68,7 @@ static inline void svm_load_seg_cache(CPUX86State *env, h= waddr addr, void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend) { CPUState *cs =3D env_cpu(env); + X86CPU *cpu =3D env_archcpu(env); target_ulong addr; uint64_t nested_ctl; uint32_t event_inj; @@ -159,6 +160,20 @@ void helper_vmrun(CPUX86State *env, int aflag, int nex= t_eip_addend) asid =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.asid)); =20 + uint64_t msrpm_base_pa =3D x86_ldq_phys(cs, env->vm_vmcb + + offsetof(struct vmcb, + control.msrpm_base_pa)); + uint64_t iopm_base_pa =3D x86_ldq_phys(cs, env->vm_vmcb + + offsetof(struct vmcb, control.iopm_base_p= a)); + + if ((msrpm_base_pa & ~0xfff) >=3D (1ull << cpu->phys_bits) - SVM_MSRPM= _SIZE) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + + if ((iopm_base_pa & ~0xfff) >=3D (1ull << cpu->phys_bits) - SVM_IOPM_S= IZE) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + env->nested_pg_mode =3D 0; =20 if (!cpu_svm_has_intercept(env, SVM_EXIT_VMRUN)) { --=20 2.31.1