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Tue, 15 Oct 2024 07:17:22 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFn6Ue+uQoj56Jr6tVkV1FQ2hIeCCIV+cUqZcQeyQQwdAYXipVdjZ+MHAOTyKAHA0e8DvfRJg== X-Received: by 2002:a5d:5108:0:b0:376:dbb5:10c2 with SMTP id ffacd0b85a97d-37d552d4a14mr11857234f8f.29.1729001841205; Tue, 15 Oct 2024 07:17:21 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Xiaoyao Li Subject: [PULL 02/25] target/i386: Enable fdp-excptn-only and zero-fcs-fds Date: Tue, 15 Oct 2024 16:16:48 +0200 Message-ID: <20241015141711.528342-3-pbonzini@redhat.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241015141711.528342-1-pbonzini@redhat.com> References: <20241015141711.528342-1-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=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.063, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1729001853701116600 Content-Type: text/plain; charset="utf-8" From: Xiaoyao Li - CPUID.(EAX=3D07H,ECX=3D0H):EBX[bit 6]: x87 FPU Data Pointer updated only on x87 exceptions if 1. - CPUID.(EAX=3D07H,ECX=3D0H):EBX[bit 13]: Deprecates FPU CS and FPU DS values if 1. i.e., X87 FCS and FDS are always zero. Define names for them so that they can be exposed to guest with -cpu host. Also define the bit field MACROs so that named cpu models can add it as well in the future. Signed-off-by: Xiaoyao Li Link: https://lore.kernel.org/r/20240814075431.339209-3-xiaoyao.li@intel.com Signed-off-by: Paolo Bonzini --- target/i386/cpu.h | 4 ++++ target/i386/cpu.c | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 4c63e7b0459..4c84cd41fd5 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -820,6 +820,8 @@ uint64_t x86_cpu_get_supported_feature_word(X86CPU *cpu= , FeatureWord w); #define CPUID_7_0_EBX_HLE (1U << 4) /* Intel Advanced Vector Extensions 2 */ #define CPUID_7_0_EBX_AVX2 (1U << 5) +/* FPU data pointer updated only on x87 exceptions */ +#define CPUID_7_0_EBX_FDP_EXCPTN_ONLY (1u << 6) /* Supervisor-mode Execution Prevention */ #define CPUID_7_0_EBX_SMEP (1U << 7) /* 2nd Group of Advanced Bit Manipulation Extensions */ @@ -830,6 +832,8 @@ uint64_t x86_cpu_get_supported_feature_word(X86CPU *cpu= , FeatureWord w); #define CPUID_7_0_EBX_INVPCID (1U << 10) /* Restricted Transactional Memory */ #define CPUID_7_0_EBX_RTM (1U << 11) +/* Zero out FPU CS and FPU DS */ +#define CPUID_7_0_EBX_ZERO_FCS_FDS (1U << 13) /* Memory Protection Extension */ #define CPUID_7_0_EBX_MPX (1U << 14) /* AVX-512 Foundation */ diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 0d30191482e..089b651591b 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1054,9 +1054,9 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] =3D { .type =3D CPUID_FEATURE_WORD, .feat_names =3D { "fsgsbase", "tsc-adjust", "sgx", "bmi1", - "hle", "avx2", NULL, "smep", + "hle", "avx2", "fdp-excptn-only", "smep", "bmi2", "erms", "invpcid", "rtm", - NULL, NULL, "mpx", NULL, + NULL, "zero-fcs-fds", "mpx", NULL, "avx512f", "avx512dq", "rdseed", "adx", "smap", "avx512ifma", "pcommit", "clflushopt", "clwb", "intel-pt", "avx512pf", "avx512er", --=20 2.46.2