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x86/kvm: Expose TSX Suspend Load Tracking feature

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TSX suspend load tracking instruction is supported by the Intel uarch
Sapphire Rapids. It aims to give a way to choose which memory accesses
do not need to be tracked in the TSX read set. It's availability is
indicated as CPUID.(EAX=7,ECX=0):EDX[bit 16].

Expose TSX Suspend Load Address Tracking feature in KVM CPUID, so KVM
could pass this information to guests and they can make use of this
feature accordingly.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/1598316478-23337-3-git-send-email-cathy.zhang@intel.com
This commit is contained in:
Cathy Zhang 2020-08-25 08:47:58 +08:00 committed by Borislav Petkov
parent 18ec63faef
commit 61aa9a0a5e
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/cpuid.c
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@ -371,7 +371,7 @@ void kvm_set_cpu_caps(void)
F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) |
F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP) |
F(MD_CLEAR) | F(AVX512_VP2INTERSECT) | F(FSRM) |
F(SERIALIZE)
F(SERIALIZE) | F(TSXLDTRK)
);
/* TSC_ADJUST and ARCH_CAPABILITIES are emulated in software. */