x86/cpufeatures: Re-enable ENQCMD

mainline inclusion
from mainline-v5.18
commit 7c1ef591
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO


CVE: NA

Intel-SIG: commit 7c1ef591 x86/cpufeatures: Re-enable ENQCMD.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

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


Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>