x86/srso: Add SRSO mitigation for Hygon processors

jira VULN-34947
cve CVE-2023-52482
commit-author Pu Wen <[email protected]>
commit a5ef7d6

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

	Signed-off-by: Pu Wen <[email protected]>
	Signed-off-by: Ingo Molnar <[email protected]>
	Acked-by: Borislav Petkov (AMD) <[email protected]>
	Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
(cherry picked from commit a5ef7d6)
	Signed-off-by: Shreeya Patel <[email protected]>

Author: shreeya-patel98

arch/x86/kernel/cpu/common.c

@@ -1389,7 +1389,7 @@ 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),
 	{}
 };