[RFC PATCH 33/34] x86/bugs: Add attack vector controls for srso

[David Kaplan]

Use attack vector controls to determine if srso 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 3be3431c20c0..ddade7d6d539 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -2842,8 +2842,14 @@ static void __init srso_select_mitigation(void)
 	}
 
 	/* Default mitigation */
-	if (srso_mitigation == SRSO_MITIGATION_AUTO)
-		srso_mitigation = SRSO_MITIGATION_SAFE_RET;
+	if (srso_mitigation == SRSO_MITIGATION_AUTO) {
+		if (should_mitigate_vuln(SRSO))
+			srso_mitigation = SRSO_MITIGATION_SAFE_RET;
+		else {
+			srso_mitigation = SRSO_MITIGATION_NONE;
+			return;
+		}
+	}
 
 	if (has_microcode) {
 		/*
-- 
2.34.1