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x86/cpu: Clear TME feature flag if TME is not enabled by BIOS

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When TME is disabled by BIOS, the dmesg output is:

  x86/tme: not enabled by BIOS

... and TME functionality is not enabled by the kernel, but the TME feature
is still shown in /proc/cpuinfo.

Clear it.

[ mingo: Clarified changelog ]

Signed-off-by: Bingsong Si <sibs@chinatelecom.cn>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "Huang, Kai" <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20240311071938.13247-1-sibs@chinatelecom.cn
This commit is contained in:
Bingsong Si
2024-03-11 15:19:37 +08:00
committed by Ingo Molnar
parent 29ba89f189
commit cd2236c2f4
1 changed files with 1 additions and 0 deletions
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arch/x86/kernel/cpu/intel.c
+1
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@@ -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;
}