Commit 74f2370b authored by Liu Jingqi's avatar Liu Jingqi Committed by Paolo Bonzini
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KVM: x86: expose MOVDIRI CPU feature into VM. 

MOVDIRI moves doubleword or quadword from register to memory through
direct store which is implemented by using write combining (WC) for
writing data directly into memory without caching the data.

Availability of the MOVDIRI instruction is indicated by the presence of
the CPUID feature flag MOVDIRI(CPUID.0x07.0x0:ECX[bit 27]).

This patch exposes the movdiri feature to the guest.

The release document ref below link:
https://software.intel.com/sites/default/files/managed/c5/15/\


architecture-instruction-set-extensions-programming-reference.pdf

Signed-off-by: default avatarLiu Jingqi <jingqi.liu@intel.com>
Cc: Xu Tao <tao3.xu@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 8acc0993

arch/x86/kvm/cpuid.c

+1 −1
Original line number Diff line number Diff line
@@ -404,7 +404,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
		F(AVX512VBMI) | F(LA57) | F(PKU) | 0 /*OSPKE*/ |

		F(AVX512_VPOPCNTDQ) | F(UMIP) | F(AVX512_VBMI2) | F(GFNI) |

		F(VAES) | F(VPCLMULQDQ) | F(AVX512_VNNI) | F(AVX512_BITALG) |

		F(CLDEMOTE);

		F(CLDEMOTE) | F(MOVDIRI);



	/* cpuid 7.0.edx*/

	const u32 kvm_cpuid_7_0_edx_x86_features =

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