linux-kernel - [PATCH] x86/split_lock: Add Tigerlake CPU models

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Date:   Tue, 26 May 2020 10:26:07 -0700
From:   Fenghua Yu <fenghua.yu@...el.com>
To:     "Thomas Gleixner" <tglx@...utronix.de>,
        "Peter Zijlstra" <peterz@...radead.org>,
        "Borislav Petkov" <bp@...en8.de>, "Ingo Molnar" <mingo@...hat.com>,
        "Tony Luck" <tony.luck@...el.com>,
        "Ravi V Shankar" <ravi.v.shankar@...el.com>
Cc:     "x86" <x86@...nel.org>,
        "linux-kernel" <linux-kernel@...r.kernel.org>,
        Fenghua Yu <fenghua.yu@...el.com>
Subject: [PATCH] x86/split_lock: Add Tigerlake CPU models

Tigerlake CPUs support split lock detection. Enumerate the feature by
the split lock support bit in the CORE_CAPABILITIES MSR.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/kernel/cpu/intel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index a19a680542ce..0717b12d7f05 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -1138,6 +1138,8 @@ static const struct x86_cpu_id split_lock_cpu_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT,	1),
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_D,	1),
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_L,	1),
+	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L,		1),
+	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE,		1),
 	{}
 };
 
-- 
2.19.1