From patchwork Fri Feb 26 02:20:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yang, Weijiang" X-Patchwork-Id: 12105659 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=-16.8 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,USER_AGENT_GIT autolearn=unavailable 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 595B1C433E0 for ; Fri, 26 Feb 2021 02:15:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A269464EFA for ; Fri, 26 Feb 2021 02:15:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A269464EFA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56922 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lFSf6-0003cq-JW for qemu-devel@archiver.kernel.org; Thu, 25 Feb 2021 21:15:24 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:49432) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFSZX-0005tC-00 for qemu-devel@nongnu.org; Thu, 25 Feb 2021 21:09:39 -0500 Received: from mga14.intel.com ([192.55.52.115]:7370) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFSZV-0002bP-4L for qemu-devel@nongnu.org; Thu, 25 Feb 2021 21:09:38 -0500 IronPort-SDR: KysJvGRAiZUiWTEexJNI34YvrJkI854C3QHBWdzI+ywlhqdL4QWPfPJXW8FRIDNS+2m5pcbci0 RSq+Lo4kZ4jg== X-IronPort-AV: E=McAfee;i="6000,8403,9906"; a="185057298" X-IronPort-AV: E=Sophos;i="5.81,207,1610438400"; d="scan'208";a="185057298" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Feb 2021 18:09:35 -0800 IronPort-SDR: JDHpce75e1uFfvdHv/L9hyXSWvhZ3ObaTrnDgG90MBW4X34CoWaT1C2iYeQcv8QdMlp4vR/Dw+ Zk84rCAswIgA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,207,1610438400"; d="scan'208";a="404680085" Received: from unknown (HELO local-michael-cet-test.sh.intel.com) ([10.239.159.166]) by orsmga008.jf.intel.com with ESMTP; 25 Feb 2021 18:09:33 -0800 From: Yang Weijiang To: pbonzini@redhat.com, richard.henderson@linaro.org, ehabkost@redhat.com, mtosatti@redhat.com, sean.j.christopherson@intel.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [PATCH v7 4/6] target/i386: Add user-space MSR access interface for CET Date: Fri, 26 Feb 2021 10:20:56 +0800 Message-Id: <20210226022058.24562-5-weijiang.yang@intel.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20210226022058.24562-1-weijiang.yang@intel.com> References: <20210226022058.24562-1-weijiang.yang@intel.com> Received-SPF: pass client-ip=192.55.52.115; envelope-from=weijiang.yang@intel.com; helo=mga14.intel.com X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, 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: Yang Weijiang Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" CET states are divided into user-mode and supervisor-mode states, MSR_KVM_GUEST_SSP holds current SHSTK pointer in use, MSR_IA32_U_CET and MSR_IA32_PL3_SSP are for user-mode states, others are for supervisor-mode states. Expose access according to current CET supported bits in CPUID and XSS. Signed-off-by: Yang Weijiang --- target/i386/cpu.h | 18 ++++++++++++ target/i386/kvm.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 90 insertions(+) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index a43fb6d597..83628e823c 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -484,6 +484,15 @@ typedef enum X86Seg { #define MSR_IA32_VMX_TRUE_ENTRY_CTLS 0x00000490 #define MSR_IA32_VMX_VMFUNC 0x00000491 +#define MSR_IA32_U_CET 0x000006a0 +#define MSR_IA32_S_CET 0x000006a2 +#define MSR_IA32_PL0_SSP 0x000006a4 +#define MSR_IA32_PL1_SSP 0x000006a5 +#define MSR_IA32_PL2_SSP 0x000006a6 +#define MSR_IA32_PL3_SSP 0x000006a7 +#define MSR_IA32_SSP_TBL 0x000006a8 +#define MSR_KVM_GUEST_SSP 0x4b564d08 + #define XSTATE_FP_BIT 0 #define XSTATE_SSE_BIT 1 #define XSTATE_YMM_BIT 2 @@ -1584,6 +1593,15 @@ typedef struct CPUX86State { uintptr_t retaddr; + uint64_t u_cet; + uint64_t s_cet; + uint64_t pl0_ssp; + uint64_t pl1_ssp; + uint64_t pl2_ssp; + uint64_t pl3_ssp; + uint64_t ssp_tbl; + uint64_t guest_ssp; + /* Fields up to this point are cleared by a CPU reset */ struct {} end_reset_fields; diff --git a/target/i386/kvm.c b/target/i386/kvm.c index a2934dda02..67d5203d19 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -2992,6 +2992,30 @@ static int kvm_put_msrs(X86CPU *cpu, int level) } } + if (((env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_CET_SHSTK) || + (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_CET_IBT)) && + (env->features[FEAT_XSAVE_XSS_LO] & XSTATE_CET_U_MASK)) { + kvm_msr_entry_add(cpu, MSR_IA32_U_CET, env->u_cet); + kvm_msr_entry_add(cpu, MSR_IA32_PL3_SSP, env->pl3_ssp); + } + + if (env->features[FEAT_XSAVE_XSS_LO] & XSTATE_CET_S_MASK) { + if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_CET_SHSTK) { + kvm_msr_entry_add(cpu, MSR_IA32_PL0_SSP, env->pl0_ssp); + kvm_msr_entry_add(cpu, MSR_IA32_PL1_SSP, env->pl1_ssp); + kvm_msr_entry_add(cpu, MSR_IA32_PL2_SSP, env->pl2_ssp); + kvm_msr_entry_add(cpu, MSR_IA32_SSP_TBL, env->ssp_tbl); + } + + kvm_msr_entry_add(cpu, MSR_IA32_S_CET, env->s_cet); + } + + if ((env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_CET_SHSTK) && + (env->features[FEAT_XSAVE_XSS_LO] & (XSTATE_CET_U_MASK | + XSTATE_CET_S_MASK))) { + kvm_msr_entry_add(cpu, MSR_KVM_GUEST_SSP, env->guest_ssp); + } + return kvm_buf_set_msrs(cpu); } @@ -3311,6 +3335,30 @@ static int kvm_get_msrs(X86CPU *cpu) } } + if (((env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_CET_SHSTK) || + (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_CET_IBT)) && + (env->features[FEAT_XSAVE_XSS_LO] & XSTATE_CET_U_MASK)) { + kvm_msr_entry_add(cpu, MSR_IA32_U_CET, 0); + kvm_msr_entry_add(cpu, MSR_IA32_PL3_SSP, 0); + } + + if (env->features[FEAT_XSAVE_XSS_LO] & XSTATE_CET_S_MASK) { + if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_CET_SHSTK) { + kvm_msr_entry_add(cpu, MSR_IA32_PL0_SSP, 0); + kvm_msr_entry_add(cpu, MSR_IA32_PL1_SSP, 0); + kvm_msr_entry_add(cpu, MSR_IA32_PL2_SSP, 0); + kvm_msr_entry_add(cpu, MSR_IA32_SSP_TBL, 0); + } + + kvm_msr_entry_add(cpu, MSR_IA32_S_CET, 0); + } + + if ((env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_CET_SHSTK) && + (env->features[FEAT_XSAVE_XSS_LO] & (XSTATE_CET_U_MASK | + XSTATE_CET_S_MASK))) { + kvm_msr_entry_add(cpu, MSR_KVM_GUEST_SSP, 0); + } + ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, cpu->kvm_msr_buf); if (ret < 0) { return ret; @@ -3597,6 +3645,30 @@ static int kvm_get_msrs(X86CPU *cpu) case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: env->msr_rtit_addrs[index - MSR_IA32_RTIT_ADDR0_A] = msrs[i].data; break; + case MSR_IA32_U_CET: + env->u_cet = msrs[i].data; + break; + case MSR_IA32_S_CET: + env->s_cet = msrs[i].data; + break; + case MSR_IA32_PL0_SSP: + env->pl0_ssp = msrs[i].data; + break; + case MSR_IA32_PL1_SSP: + env->pl1_ssp = msrs[i].data; + break; + case MSR_IA32_PL2_SSP: + env->pl2_ssp = msrs[i].data; + break; + case MSR_IA32_PL3_SSP: + env->pl3_ssp = msrs[i].data; + break; + case MSR_IA32_SSP_TBL: + env->ssp_tbl = msrs[i].data; + break; + case MSR_KVM_GUEST_SSP: + env->guest_ssp = msrs[i].data; + break; } }