Commit a17f3227 authored Jan 10, 2017 by Piotr Luc Committed by Radim Krčmář Jan 17, 2017

kvm: x86: Expose Intel VPOPCNTDQ feature to guest



Vector population count instructions for dwords and qwords are to be
used in future Intel Xeon & Xeon Phi processors. The bit 14 of
CPUID[level:0x07, ECX] indicates that the new instructions are
supported by a processor.

The spec can be found in the Intel Software Developer Manual (SDM)
or in the Instruction Set Extensions Programming Reference (ISE).

Signed-off-by: Piotr Luc <piotr.luc@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

parent a9ff720e

arch/x86/kvm/cpuid.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -383,7 +383,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,

		/* cpuid 7.0.ecx*/
		const u32 kvm_cpuid_7_0_ecx_x86_features =
		F(AVX512VBMI) \| F(PKU) \| 0 /OSPKE/;
		F(AVX512VBMI) \| F(PKU) \| 0 /OSPKE/ \| F(AVX512_VPOPCNTDQ);

		/* cpuid 7.0.edx*/
		const u32 kvm_cpuid_7_0_edx_x86_features =

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