From patchwork Fri Feb 26 02:20:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yang, Weijiang" X-Patchwork-Id: 12105655 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 7167FC433DB for ; Fri, 26 Feb 2021 02:13:06 +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 E5D4164EF5 for ; Fri, 26 Feb 2021 02:13:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E5D4164EF5 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]:52806 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lFScq-0001r8-Vu for qemu-devel@archiver.kernel.org; Thu, 25 Feb 2021 21:13:05 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:49412) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFSZV-0005sE-Cy for qemu-devel@nongnu.org; Thu, 25 Feb 2021 21:09:37 -0500 Received: from mga14.intel.com ([192.55.52.115]:7378) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFSZR-0002dW-S9 for qemu-devel@nongnu.org; Thu, 25 Feb 2021 21:09:37 -0500 IronPort-SDR: tEbwVWC6AJXp2KA3bqiBCxkqMaV+TqvevfpFWMxrZsVyqMljkBCuivCTOoq3AYoXvEU+tBll7A l57npRSEyqYA== X-IronPort-AV: E=McAfee;i="6000,8403,9906"; a="185057281" X-IronPort-AV: E=Sophos;i="5.81,207,1610438400"; d="scan'208";a="185057281" 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 18:09:30 -0800 IronPort-SDR: z8elN4nmMyPkRHVMlzUQRR5Wz+T0BW3LoL+nlkrCvb3JTdz0Vdmjx+5+YsKohwU3UZv90mNwhK cnfRArgsykTA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,207,1610438400"; d="scan'208";a="404679990" 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 18:09:28 -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 2/6] target/i386: Enable XSS feature enumeration for CPUID Date: Fri, 26 Feb 2021 10:20:54 +0800 Message-Id: <20210226022058.24562-3-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" Currently, CPUID.(EAX=0DH,ECX=01H) doesn't enumerate features in XSS properly, add the support here. XCR0 bits indicate user-mode XSAVE components, and XSS bits indicate supervisor-mode XSAVE components. Signed-off-by: Yang Weijiang --- target/i386/cpu.c | 48 ++++++++++++++++++++++++++++++++++++++++++----- target/i386/cpu.h | 12 ++++++++++++ 2 files changed, 55 insertions(+), 5 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 89edab4240..f3923988ed 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1058,6 +1058,24 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { }, .tcg_features = TCG_XSAVE_FEATURES, }, + [FEAT_XSAVE_XSS_LO] = { + .type = CPUID_FEATURE_WORD, + .cpuid = { + .eax = 0xD, + .needs_ecx = true, + .ecx = 1, + .reg = R_ECX, + }, + }, + [FEAT_XSAVE_XSS_HI] = { + .type = CPUID_FEATURE_WORD, + .cpuid = { + .eax = 0xD, + .needs_ecx = true, + .ecx = 1, + .reg = R_EDX + }, + }, [FEAT_6_EAX] = { .type = CPUID_FEATURE_WORD, .feat_names = { @@ -1478,6 +1496,9 @@ static uint32_t xsave_area_size(uint64_t mask) for (i = 0; i < ARRAY_SIZE(x86_ext_save_areas); i++) { const ExtSaveArea *esa = &x86_ext_save_areas[i]; if ((mask >> i) & 1) { + if (i >= 2 && !esa->offset) { + continue; + } ret = MAX(ret, esa->offset + esa->size); } } @@ -1489,12 +1510,18 @@ static inline bool accel_uses_host_cpuid(void) return kvm_enabled() || hvf_enabled(); } -static inline uint64_t x86_cpu_xsave_components(X86CPU *cpu) +static inline uint64_t x86_cpu_xsave_xcr0_components(X86CPU *cpu) { return ((uint64_t)cpu->env.features[FEAT_XSAVE_XCR0_HI]) << 32 | cpu->env.features[FEAT_XSAVE_XCR0_LO]; } +static inline uint64_t x86_cpu_xsave_xss_components(X86CPU *cpu) +{ + return ((uint64_t)cpu->env.features[FEAT_XSAVE_XSS_HI]) << 32 | + cpu->env.features[FEAT_XSAVE_XSS_LO]; +} + const char *get_register_name_32(unsigned int reg) { if (reg >= CPU_NB_REGS32) { @@ -5716,7 +5743,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, } if (count == 0) { - *ecx = xsave_area_size(x86_cpu_xsave_components(cpu)); + *ecx = xsave_area_size(x86_cpu_xsave_xcr0_components(cpu)); *eax = env->features[FEAT_XSAVE_XCR0_LO]; *edx = env->features[FEAT_XSAVE_XCR0_HI]; /* @@ -5728,11 +5755,17 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, *ebx = kvm_enabled() ? *ecx : xsave_area_size(env->xcr0); } else if (count == 1) { *eax = env->features[FEAT_XSAVE]; + *ecx = env->features[FEAT_XSAVE_XSS_LO]; + *edx = env->features[FEAT_XSAVE_XSS_HI]; } else if (count < ARRAY_SIZE(x86_ext_save_areas)) { - if ((x86_cpu_xsave_components(cpu) >> count) & 1) { - const ExtSaveArea *esa = &x86_ext_save_areas[count]; + const ExtSaveArea *esa = &x86_ext_save_areas[count]; + if ((x86_cpu_xsave_xcr0_components(cpu) >> count) & 1) { *eax = esa->size; *ebx = esa->offset; + } else if ((x86_cpu_xsave_xss_components(cpu) >> count) & 1) { + *eax = esa->size; + *ebx = 0; + *ecx = 1; } } break; @@ -6059,6 +6092,9 @@ static void x86_cpu_reset(DeviceState *dev) } for (i = 2; i < ARRAY_SIZE(x86_ext_save_areas); i++) { const ExtSaveArea *esa = &x86_ext_save_areas[i]; + if (!esa->offset) { + continue; + } if (env->features[esa->feature] & esa->bits) { xcr0 |= 1ull << i; } @@ -6295,8 +6331,10 @@ static void x86_cpu_enable_xsave_components(X86CPU *cpu) } } - env->features[FEAT_XSAVE_XCR0_LO] = mask; + env->features[FEAT_XSAVE_XCR0_LO] = mask & CPUID_XSTATE_XCR0_MASK; env->features[FEAT_XSAVE_XCR0_HI] = mask >> 32; + env->features[FEAT_XSAVE_XSS_LO] = mask & CPUID_XSTATE_XSS_MASK; + env->features[FEAT_XSAVE_XSS_HI] = mask >> 32; } /***** Steps involved on loading and filtering CPUID data diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 52f31335c4..8aeaa8869a 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -504,6 +504,16 @@ typedef enum X86Seg { #define XSTATE_Hi16_ZMM_MASK (1ULL << XSTATE_Hi16_ZMM_BIT) #define XSTATE_PKRU_MASK (1ULL << XSTATE_PKRU_BIT) +/* CPUID feature bits available in XCR0 */ +#define CPUID_XSTATE_XCR0_MASK (XSTATE_FP_MASK | XSTATE_SSE_MASK | \ + XSTATE_YMM_MASK | XSTATE_BNDREGS_MASK | \ + XSTATE_BNDCSR_MASK | XSTATE_OPMASK_MASK | \ + XSTATE_ZMM_Hi256_MASK | \ + XSTATE_Hi16_ZMM_MASK | XSTATE_PKRU_MASK) + +/* CPUID feature bits available in XSS */ +#define CPUID_XSTATE_XSS_MASK 0 + /* CPUID feature words */ typedef enum FeatureWord { FEAT_1_EDX, /* CPUID[1].EDX */ @@ -541,6 +551,8 @@ typedef enum FeatureWord { FEAT_VMX_EPT_VPID_CAPS, FEAT_VMX_BASIC, FEAT_VMX_VMFUNC, + FEAT_XSAVE_XSS_LO, /* CPUID[EAX=0xd,ECX=1].ECX */ + FEAT_XSAVE_XSS_HI, /* CPUID[EAX=0xd,ECX=1].EDX */ FEATURE_WORDS, } FeatureWord;