The following commit has been merged into the x86/cpu branch of tip: Commit-ID: 61aa9a0a5eae2100c171698bffabde8d5e9f694d Gitweb: https://git.kernel.org/tip/61aa9a0a5eae2100c171698bffabde8d5e9f694d Author: Cathy Zhang <[email protected]> AuthorDate: Tue, 25 Aug 2020 08:47:58 +08:00 Committer: Borislav Petkov <[email protected]> CommitterDate: Sun, 30 Aug 2020 21:34:10 +02:00
x86/kvm: Expose TSX Suspend Load Tracking feature 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 <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Reviewed-by: Tony Luck <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- arch/x86/kvm/cpuid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 3fd6eec..7456f9a 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -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. */
