From: Cathy Zhang <cathy.zhang@intel.com>
Date: Tue, 25 Aug 2020 08:47:58 +0800
Subject: x86/kvm: Expose TSX Suspend Load Tracking feature
Git-commit: 61aa9a0a5eae2100c171698bffabde8d5e9f694d
Patch-mainline: v5.10-rc1
References: jsc#16232
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
---
arch/x86/kvm/cpuid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -373,7 +373,7 @@ static inline void do_cpuid_7_mask(struc
const u32 kvm_cpuid_7_0_edx_x86_features =
F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) |
F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP) |
- F(MD_CLEAR) | F(SERIALIZE);
+ F(MD_CLEAR) | F(SERIALIZE) | F(TSXLDTRK);
/* cpuid 7.1.eax */
const u32 kvm_cpuid_7_1_eax_x86_features =