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Message-Id: <20240312103534.9037-1-sibs@chinatelecom.cn>
Date: Tue, 12 Mar 2024 18:35:34 +0800
From: Bingsong Si <sibs@...natelecom.cn>
To: kai.huang@...el.com,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>
Cc: linux-kernel@...r.kernel.org,
sibs@...natelecom.cn
Subject: [PATCH v3] x86/cpu: Clear TME feature flag if TME is not enabled by BIOS
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@...natelecom.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
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