mainline inclusion
from mainline-v5.14-rc1
commit 30a304a1
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I590ZC
CVE: NA

Intel-SIG: commit 30a304a1 x86/fpu: Mask PKRU from kernel XRSTOR[S] operations.

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

As the PKRU state is managed separately restoring it from the xstate
buffer would be counterproductive as it might either restore a stale
value or reinit the PKRU state to 0.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Reviewed-by: NBorislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.606745195@linutronix.deSigned-off-by: NLin Wang <lin.x.wang@intel.com>