linux-kernel - [PATCH] x86/srso: Add SRSO mitigation for Hygon processors

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Date:   Thu, 28 Sep 2023 14:59:16 +0800
From:   Pu Wen <pu_wen@...mail.com>
To:     bp@...en8.de, mingo@...hat.com, dave.hansen@...ux.intel.com,
        x86@...nel.org, hpa@...or.com, peterz@...radead.org,
        kim.phillips@....com
Cc:     linux-kernel@...r.kernel.org, Pu Wen <puwen@...on.cn>,
        stable@...r.kernel.org
Subject: [PATCH] x86/srso: Add SRSO mitigation for Hygon processors

From: Pu Wen <puwen@...on.cn>

Add mitigation for the speculative return stack overflow vulnerability
which exists on Hygon processors.

Signed-off-by: Pu Wen <puwen@...on.cn>
Cc: <stable@...r.kernel.org>
---
 arch/x86/kernel/cpu/common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 382d4e6b848d..4e5ffc8b0e46 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1303,7 +1303,7 @@ static const struct x86_cpu_id cpu_vuln_blacklist[] __initconst = {
 	VULNBL_AMD(0x15, RETBLEED),
 	VULNBL_AMD(0x16, RETBLEED),
 	VULNBL_AMD(0x17, RETBLEED | SMT_RSB | SRSO),
-	VULNBL_HYGON(0x18, RETBLEED | SMT_RSB),
+	VULNBL_HYGON(0x18, RETBLEED | SMT_RSB | SRSO),
 	VULNBL_AMD(0x19, SRSO),
 	{}
 };
-- 
2.23.0