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Tue, 20 Sep 2022 10:25:21 -0700 (PDT) Received: from [192.168.10.118] ([2001:b07:6468:f312:9af8:e5f5:7516:fa89]) by smtp.gmail.com with ESMTPSA id w8-20020a50fa88000000b0045256570210sm254449edr.3.2022.09.20.10.25.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Sep 2022 10:25:20 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, paul@nowt.org Subject: [PATCH v2 08/37] target/i386: add CPUID feature checks to new decoder Date: Tue, 20 Sep 2022 19:24:38 +0200 Message-Id: <20220920172507.95568-9-pbonzini@redhat.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220920172507.95568-1-pbonzini@redhat.com> References: <20220920172507.95568-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit 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: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Richard Henderson Signed-off-by: Paolo Bonzini --- target/i386/tcg/decode-new.c.inc | 55 ++++++++++++++++++++++++++++++++ target/i386/tcg/decode-new.h | 20 ++++++++++++ 2 files changed, 75 insertions(+) diff --git a/target/i386/tcg/decode-new.c.inc b/target/i386/tcg/decode-new.c.inc index be4e5705ed..e268b5fb48 100644 --- a/target/i386/tcg/decode-new.c.inc +++ b/target/i386/tcg/decode-new.c.inc @@ -85,6 +85,7 @@ #define X86_OP_ENTRY0(op, ...) \ X86_OP_ENTRY3(op, None, None, None, None, None, None, ## __VA_ARGS__) +#define cpuid(feat) .cpuid = X86_FEAT_##feat, #define i64 .special = X86_SPECIAL_i64, #define o64 .special = X86_SPECIAL_o64, #define xchg .special = X86_SPECIAL_Locked, @@ -513,6 +514,56 @@ static bool decode_insn(DisasContext *s, CPUX86State *env, X86DecodeFunc decode_ return true; } +static bool has_cpuid_feature(DisasContext *s, X86CPUIDFeature cpuid) +{ + switch (cpuid) { + case X86_FEAT_None: + return true; + case X86_FEAT_MOVBE: + return (s->cpuid_ext_features & CPUID_EXT_MOVBE); + case X86_FEAT_PCLMULQDQ: + return (s->cpuid_ext_features & CPUID_EXT_PCLMULQDQ); + case X86_FEAT_SSE: + return (s->cpuid_ext_features & CPUID_SSE); + case X86_FEAT_SSE2: + return (s->cpuid_ext_features & CPUID_SSE2); + case X86_FEAT_SSE3: + return (s->cpuid_ext_features & CPUID_EXT_SSE3); + case X86_FEAT_SSSE3: + return (s->cpuid_ext_features & CPUID_EXT_SSSE3); + case X86_FEAT_SSE41: + return (s->cpuid_ext_features & CPUID_EXT_SSE41); + case X86_FEAT_SSE42: + return (s->cpuid_ext_features & CPUID_EXT_SSE42); + case X86_FEAT_AES: + if (!(s->cpuid_ext_features & CPUID_EXT_AES)) { + return false; + } else if (!(s->prefix & PREFIX_VEX)) { + return true; + } else if (!(s->cpuid_ext_features & CPUID_EXT_AVX)) { + return false; + } else { + return !s->vex_l || (s->cpuid_7_0_ecx_features & CPUID_7_0_ECX_VAES); + } + + case X86_FEAT_AVX: + return (s->cpuid_ext_features & CPUID_EXT_AVX); + + case X86_FEAT_SSE4A: + return (s->cpuid_ext3_features & CPUID_EXT3_SSE4A); + + case X86_FEAT_ADX: + return (s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_ADX); + case X86_FEAT_BMI1: + return (s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_BMI1); + case X86_FEAT_BMI2: + return (s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_BMI2); + case X86_FEAT_AVX2: + return (s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_AVX2); + } + g_assert_not_reached(); +} + static void decode_temp_free(X86DecodedOp *op) { if (op->v_ptr) { @@ -701,6 +752,10 @@ static void disas_insn_new(DisasContext *s, CPUState *cpu, int b) goto unknown_op; } + if (!has_cpuid_feature(s, decode.e.cpuid)) { + goto illegal_op; + } + switch (decode.e.special) { case X86_SPECIAL_None: break; diff --git a/target/i386/tcg/decode-new.h b/target/i386/tcg/decode-new.h index 3a856b48e7..e62e9c9d87 100644 --- a/target/i386/tcg/decode-new.h +++ b/target/i386/tcg/decode-new.h @@ -93,6 +93,25 @@ typedef enum X86OpSize { X86_SIZE_f64, } X86OpSize; +typedef enum X86CPUIDFeature { + X86_FEAT_None, + X86_FEAT_ADX, + X86_FEAT_AES, + X86_FEAT_AVX, + X86_FEAT_AVX2, + X86_FEAT_BMI1, + X86_FEAT_BMI2, + X86_FEAT_MOVBE, + X86_FEAT_PCLMULQDQ, + X86_FEAT_SSE, + X86_FEAT_SSE2, + X86_FEAT_SSE3, + X86_FEAT_SSSE3, + X86_FEAT_SSE41, + X86_FEAT_SSE42, + X86_FEAT_SSE4A, +} X86CPUIDFeature; + /* Execution flags */ typedef enum X86OpUnit { @@ -160,6 +179,7 @@ struct X86OpEntry { X86OpSize s3:8; X86InsnSpecial special:8; + X86CPUIDFeature cpuid:8; bool is_decode:1; }; -- 2.37.2