]> git.baikalelectronics.ru Git - kernel.git/commit
KVM: x86: expose MOVDIRI CPU feature into VM.
authorLiu Jingqi <jingqi.liu@intel.com>
Tue, 6 Nov 2018 05:55:27 +0000 (13:55 +0800)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 20 Feb 2019 21:48:26 +0000 (22:48 +0100)
commitdec2f1f9933baf7f7d750f44f7cc03e3b46c2ef5
tree3561f8437d220f767ee39f836dd287b87bf531b2
parent6897ec215029300afcab0957f081a7a76344f456
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>
arch/x86/kvm/cpuid.c