mirror of https://gitee.com/openkylin/linux.git
KVM: Expose AVX_VNNI instruction to guset
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 This instruction is currently documented in the latest "extensions" manual (ISE). It will appear in the "main" manual (SDM) in the future. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Message-Id: <20210105004909.42000-3-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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arch/x86/kvm
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@ -434,7 +434,7 @@ void kvm_set_cpu_caps(void)
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kvm_cpu_cap_set(X86_FEATURE_SPEC_CTRL_SSBD);
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kvm_cpu_cap_mask(CPUID_7_1_EAX,
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F(AVX512_BF16)
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F(AVX_VNNI) | F(AVX512_BF16)
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);
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kvm_cpu_cap_mask(CPUID_D_1_EAX,
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