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target/i386: Add support for AMX-COMPLEX in CPUID enumeration

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Latest Intel platform GraniteRapids-D introduces AMX-COMPLEX, which adds
two instructions to perform matrix multiplication of two tiles containing
complex elements and accumulate the results into a packed single precision
tile.

AMX-COMPLEX is enumerated via CPUID.(EAX=7,ECX=1):EDX[bit 8]. Add the CPUID
definition for AMX-COMPLEX, AMX-COMPLEX will be enabled automatically when
using '-cpu host' and KVM advertises AMX-COMPLEX to userspace.

Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-ID: <20230830074324.84059-1-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Tao Su 2023-08-30 15:43:24 +08:00 committed by Paolo Bonzini
parent abd41884c5
commit 3e76bafb28
2 changed files with 3 additions and 1 deletions
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2
target/i386/cpu.c
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@ -980,7 +980,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.feat_names = {
NULL, NULL, NULL, NULL,
"avx-vnni-int8", "avx-ne-convert", NULL, NULL,
NULL, NULL, NULL, NULL,
"amx-complex", NULL, NULL, NULL,
NULL, NULL, "prefetchiti", NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,

2
target/i386/cpu.h
View file

@ -930,6 +930,8 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
#define CPUID_7_1_EDX_AVX_VNNI_INT8 (1U << 4)
/* AVX NE CONVERT Instructions */
#define CPUID_7_1_EDX_AVX_NE_CONVERT (1U << 5)
/* AMX COMPLEX Instructions */
#define CPUID_7_1_EDX_AMX_COMPLEX (1U << 8)
/* PREFETCHIT0/1 Instructions */
#define CPUID_7_1_EDX_PREFETCHITI (1U << 14)