Expose AVX (VEX-encoded) versions of the Vector Neural Network Instructions to guest.
The bit definition: CPUID.(EAX=7,ECX=1):EAX[bit 4] AVX_VNNI The following instructions are available when this feature is present in the guest. 1. VPDPBUS: Multiply and Add Unsigned and Signed Bytes 2. VPDPBUSDS: Multiply and Add Unsigned and Signed Bytes with Saturation 3. VPDPWSSD: Multiply and Add Signed Word Integers 4. VPDPWSSDS: Multiply and Add Signed Integers with Saturation The release document ref below link: https://software.intel.com/content/www/us/en/develop/download/\ intel-architecture-instruction-set-extensions-programming-reference.html Signed-off-by: Yang Zhong <yang.zh...@intel.com> --- target/i386/cpu.c | 4 ++-- target/i386/cpu.h | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index ae9fd9f31d..f748989860 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -996,7 +996,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .type = CPUID_FEATURE_WORD, .feat_names = { NULL, NULL, NULL, NULL, - NULL, "avx512-bf16", NULL, NULL, + "avx-vnni", "avx512-bf16", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, @@ -3273,7 +3273,7 @@ static X86CPUDefinition builtin_x86_defs[] = { MSR_ARCH_CAP_SKIP_L1DFL_VMENTRY | MSR_ARCH_CAP_MDS_NO | MSR_ARCH_CAP_PSCHANGE_MC_NO | MSR_ARCH_CAP_TAA_NO, .features[FEAT_7_1_EAX] = - CPUID_7_1_EAX_AVX512_BF16, + CPUID_7_1_EAX_AVX_VNNI | CPUID_7_1_EAX_AVX512_BF16, /* * Missing: XSAVES (not supported by some Linux versions, * including v4.1 to v4.12). diff --git a/target/i386/cpu.h b/target/i386/cpu.h index b4b136cd0d..efda0d6178 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -805,6 +805,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; /* Speculative Store Bypass Disable */ #define CPUID_7_0_EDX_SPEC_CTRL_SSBD (1U << 31) +/* AVX VNNI Instruction */ +#define CPUID_7_1_EAX_AVX_VNNI (1U << 4) /* AVX512 BFloat16 Instruction */ #define CPUID_7_1_EAX_AVX512_BF16 (1U << 5) -- 2.29.2.334.gfaefdd61ec
