linux-kernel - [PATCH 2/2] x86: Expose TSX Suspend Load Address Tracking

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Date:   Mon,  6 Jul 2020 06:59:52 +0800
From:   Cathy Zhang <cathy.zhang@...el.com>
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org, x86@...nel.org
Cc:     pbonzini@...hat.com, sean.j.christopherson@...el.com,
        vkuznets@...hat.com, wanpengli@...cent.com, jmattson@...gle.com,
        joro@...tes.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, ricardo.neri-calderon@...ux.intel.com,
        kyung.min.park@...el.com, Cathy Zhang <cathy.zhang@...el.com>
Subject: [PATCH 2/2] x86: Expose TSX Suspend Load Address Tracking

TSX Suspend Load Address Tracking is supported by intel processors,
like Sapphire Rapids. Expose it in KVM supported cpuid.

The associated kernel enumeration patches link is as follows:
https://lore.kernel.org/patchwork/patch/1254756/

Signed-off-by: Cathy Zhang <cathy.zhang@...el.com>
---
 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 e603aeb..dcf48cc 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -342,7 +342,7 @@ 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(TSX_LDTRK)
 	);
 
 	/* TSC_ADJUST and ARCH_CAPABILITIES are emulated in software. */
-- 
1.8.3.1