[PATCH v3] x86/cpu: Clear TME feature flag if TME is not enabled by BIOS

Bingsong Si posted 1 patch 1 year, 11 months ago
arch/x86/kernel/cpu/intel.c | 1 +
1 file changed, 1 insertion(+)
[PATCH v3] x86/cpu: Clear TME feature flag if TME is not enabled by BIOS
Posted by Bingsong Si 1 year, 11 months ago
When TME is disabled by BIOS, dmesg output is "x86/tme: not enabled by
BIOS" but the TME feature is still shown in the output of/proc/cpuinfo.

Signed-off-by: Bingsong Si <sibs@chinatelecom.cn>
---
 arch/x86/kernel/cpu/intel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 40dec9b56f87..119ae291573b 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -228,6 +228,7 @@ static void detect_tme_early(struct cpuinfo_x86 *c)
 	if (!TME_ACTIVATE_LOCKED(tme_activate) || !TME_ACTIVATE_ENABLED(tme_activate)) {
 		pr_info_once("x86/tme: not enabled by BIOS\n");
 		mktme_status = MKTME_DISABLED;
+		clear_cpu_cap(c, X86_FEATURE_TME);
 		return;
 	}
 
-- 
2.34.1