[tip: x86/urgent] x86/srso: Add SRSO mitigation for Hygon processors

[tip-bot2 for Pu Wen]

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     a5ef7d68cea1344cf524f04981c2b3f80bedbb0d
Gitweb:        https://git.kernel.org/tip/a5ef7d68cea1344cf524f04981c2b3f80bedbb0d
Author:        Pu Wen <puwen@xxxxxxxx>
AuthorDate:    Thu, 28 Sep 2023 14:59:16 +08:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Thu, 28 Sep 2023 09:57:07 +02:00

x86/srso: Add SRSO mitigation for Hygon processors

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

Signed-off-by: Pu Wen <puwen@xxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Acked-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/tencent_4A14812842F104E93AA722EC939483CEFF05@xxxxxx
---
 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 382d4e6..4e5ffc8 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),
 	{}
 };