linux-kernel - [PATCH] x86/cpu: Add Zhaoxin CPUs to the cpu vulnerability whitelist

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Date:   Wed, 15 Jan 2020 16:11:22 +0800
From:   Tony W Wang-oc <TonyWWang-oc@...oxin.com>
To:     <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>,
        <hpa@...or.com>, <x86@...nel.org>, <luto@...nel.org>,
        <peterz@...radead.org>, <pawan.kumar.gupta@...ux.intel.com>,
        <fenghua.yu@...el.com>, <vineela.tummalapalli@...el.com>,
        <linux-kernel@...r.kernel.org>
CC:     <DavidWang@...oxin.com>, <CooperYan@...oxin.com>,
        <QiyuanWang@...oxin.com>, <HerryYang@...oxin.com>
Subject: [PATCH] x86/cpu: Add Zhaoxin CPUs to the cpu vulnerability whitelist

New Zhaoxin family 7 CPUs are not affected by SWAPGS, add these CPUs
to the cpu vulnerability whitelist.

Signed-off-by: Tony W Wang-oc <TonyWWang-oc@...oxin.com>
---
 arch/x86/kernel/cpu/common.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 2e4d902..3488507 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1084,6 +1084,10 @@ static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {
 	/* FAMILY_ANY must be last, otherwise 0x0f - 0x12 matches won't work */
 	VULNWL_AMD(X86_FAMILY_ANY,	NO_MELTDOWN | NO_L1TF | NO_MDS | NO_SWAPGS | NO_ITLB_MULTIHIT),
 	VULNWL_HYGON(X86_FAMILY_ANY,	NO_MELTDOWN | NO_L1TF | NO_MDS | NO_SWAPGS | NO_ITLB_MULTIHIT),
+
+	/* Zhaoxin Family 7 */
+	VULNWL(CENTAUR, 7, X86_MODEL_ANY,       NO_SWAPGS),
+	VULNWL(ZHAOXIN, 7, X86_MODEL_ANY,       NO_SWAPGS),
 	{}
 };
 
-- 
2.7.4