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authorLiu Jingqi <jingqi.liu@intel.com>2018-11-06 13:55:27 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2019-02-20 22:48:26 +0100
commit74f2370bb64f5c1c418f115e338f20f11b75f954 (patch)
tree3561f8437d220f767ee39f836dd287b87bf531b2
parent8acc0993e3f9a04a407ff1507dd329455f340121 (diff)
downloadlinux-stericsson-74f2370bb64f5c1c418f115e338f20f11b75f954.tar.gz
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: Liu Jingqi <jingqi.liu@intel.com> Cc: Xu Tao <tao3.xu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/kvm/cpuid.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index bbffa6c54697..8045434093f8 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -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 =