[RFC PATCH 27/34] x86/bugs: Add attack vector controls for spectre_v1

[David Kaplan]

Use attack vector controls to determine if spectre_v1 mitigation is
required.

Signed-off-by: David Kaplan <david.kaplan@xxxxxxx>
---
 arch/x86/kernel/cpu/bugs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 5fbf5a274c9f..d7e154031c93 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1114,6 +1114,9 @@ static void __init spectre_v1_select_mitigation(void)
 {
 	if (!boot_cpu_has_bug(X86_BUG_SPECTRE_V1) || cpu_mitigations_off())
 		spectre_v1_mitigation = SPECTRE_V1_MITIGATION_NONE;
+
+	if (!should_mitigate_vuln(SPECTRE_V1))
+		spectre_v1_mitigation = SPECTRE_V1_MITIGATION_NONE;
 }
 
 static void __init spectre_v1_apply_mitigation(void)
-- 
2.34.1