[RFC PATCH 26/34] x86/bugs: Add attack vector controls for gds

[David Kaplan]

Use attack vector controls to determine if gds mitigation is required.

Signed-off-by: David Kaplan <david.kaplan@xxxxxxx>
---
 arch/x86/kernel/cpu/bugs.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index d86755218c72..5fbf5a274c9f 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1001,8 +1001,14 @@ static void __init gds_select_mitigation(void)
 		gds_mitigation = GDS_MITIGATION_OFF;
 	/* Will verify below that mitigation _can_ be disabled */
 
-	if (gds_mitigation == GDS_MITIGATION_AUTO)
-		gds_mitigation = GDS_MITIGATION_FULL;
+	if (gds_mitigation == GDS_MITIGATION_AUTO) {
+		if (should_mitigate_vuln(GDS))
+			gds_mitigation = GDS_MITIGATION_FULL;
+		else {
+			gds_mitigation = GDS_MITIGATION_OFF;
+			return;
+		}
+	}
 
 	/* No microcode */
 	if (!(x86_arch_cap_msr & ARCH_CAP_GDS_CTRL)) {
-- 
2.34.1