The following commit has been merged into the x86/pti branch of tip:
Commit-ID: a84de2fa962c1b0551653fe245d6cb5f6129179c
Gitweb: https://git.kernel.org/tip/a84de2fa962c1b0551653fe245d6cb5f6129179c
Author: Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx>
AuthorDate: Fri, 17 Jan 2020 10:24:32 +08:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Fri, 17 Jan 2020 19:13:47 +01:00
x86/speculation/swapgs: Exclude Zhaoxin CPUs from SWAPGS vulnerability
New Zhaoxin family 7 CPUs are not affected by the SWAPGS vulnerability. So
mark these CPUs in the cpu vulnerability whitelist accordingly.
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/1579227872-26972-3-git-send-email-TonyWWang-oc@xxxxxxxxxxx
---
arch/x86/kernel/cpu/common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 6048bd3..ca4a0d2 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1087,8 +1087,8 @@ static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {
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_SPECTRE_V2),
- VULNWL(ZHAOXIN, 7, X86_MODEL_ANY, NO_SPECTRE_V2),
+ VULNWL(CENTAUR, 7, X86_MODEL_ANY, NO_SPECTRE_V2 | NO_SWAPGS),
+ VULNWL(ZHAOXIN, 7, X86_MODEL_ANY, NO_SPECTRE_V2 | NO_SWAPGS),
{}
};
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