Messages in this thread | | | From | Yang Zhong <> | Subject | [PATCH 0/2] Enumerate and expose AVX_VNNI feature | Date | Tue, 5 Jan 2021 08:49:07 +0800 |
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A processor supports AVX_VNNI instructions if CPUID.(EAX=7,ECX=1):EAX[bit 4] is present.
This series includes kernel and kvm patches, kernel patch define this new cpu feature bit and kvm expose this bit to guest. When this bit is enabled on cpu or vcpu, the cpu feature flag is shown as "avx_vnni" in /proc/cpuinfo of host and guest.
Detailed information on the instruction and CPUID feature flag can be found in the latest "extensions" manual [1].
Reference: [1]. https://software.intel.com/content/www/us/en/develop/download/intel-architecture-instruction-set-extensions-programming-reference.html
Kyung Min Park (1): Enumerate AVX Vector Neural Network instructions
Yang Zhong (1): KVM: Expose AVX_VNNI instruction to guset
arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/kvm/cpuid.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-)
-- 2.29.2.334.gfaefdd61ec
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