linux-kernel - [PATCH v5.10] x86/srso: Add SRSO mitigation for Hygon processors

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Message-Id: <20240402084809.82243-1-ashwin.kamat@broadcom.com>
Date: Tue,  2 Apr 2024 14:18:09 +0530
From: Ashwin Dayanand Kamat <ashwin.kamat@...adcom.com>
To: stable@...r.kernel.org,
	gregkh@...uxfoundation.org
Cc: tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	x86@...nel.org,
	hpa@...or.com,
	linux-kernel@...r.kernel.org,
	ajay.kaher@...adcom.com,
	alexey.makhalov@...adcom.com,
	vasavi.sirnapalli@...adcom.com,
	Pu Wen <puwen@...on.cn>,
	Ingo Molnar <mingo@...nel.org>,
	Ashwin Dayanand Kamat <ashwin.kamat@...adcom.com>
Subject: [PATCH v5.10] x86/srso: Add SRSO mitigation for Hygon processors

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

[Upstream commit a5ef7d68cea1344cf524f04981c2b3f80bedbb0d]

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

Signed-off-by: Pu Wen <puwen@...on.cn>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Borislav Petkov (AMD) <bp@...en8.de>
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/tencent_4A14812842F104E93AA722EC939483CEFF05@qq.com
Signed-off-by: Ashwin Dayanand Kamat <ashwin.kamat@...adcom.com>
---
 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 4ecc6072e..8aa43c8ca 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1168,7 +1168,7 @@ static const struct x86_cpu_id cpu_vuln_blacklist[] __initconst = {
 	VULNBL_AMD(0x15, RETBLEED),
 	VULNBL_AMD(0x16, RETBLEED),
 	VULNBL_AMD(0x17, RETBLEED | SRSO),
-	VULNBL_HYGON(0x18, RETBLEED),
+	VULNBL_HYGON(0x18, RETBLEED | SRSO),
 	VULNBL_AMD(0x19, SRSO),
 	{}
 };
-- 
2.35.6