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x86/cpufeatures: Re-enable ENQCMD

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The ENQCMD feature can only be used if CONFIG_INTEL_IOMMU_SVM is set.
Add X86_FEATURE_ENQCMD to the disabled features mask as appropriate so
that cpu_feature_enabled() can be used to check the feature.

  [ bp: Massage commit message. ]

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220207230254.3342514-10-fenghua.yu@intel.com
This commit is contained in:
Fenghua Yu 2022-02-07 15:02:52 -08:00 committed by Borislav Petkov
parent fa6af69f38
commit 7c1ef59145
1 changed files with 5 additions and 2 deletions
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7
arch/x86/include/asm/disabled-features.h
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@ -56,8 +56,11 @@
# define DISABLE_PTI (1 << (X86_FEATURE_PTI & 31))
#endif
/* Force disable because it's broken beyond repair */
#define DISABLE_ENQCMD (1 << (X86_FEATURE_ENQCMD & 31))
#ifdef CONFIG_INTEL_IOMMU_SVM
# define DISABLE_ENQCMD 0
#else
# define DISABLE_ENQCMD (1 << (X86_FEATURE_ENQCMD & 31))
#endif
#ifdef CONFIG_X86_SGX
# define DISABLE_SGX 0