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/linux/arch/x86/include/asm/
H A Dpkru.hdiff 72a6c08c44e4460e39315ca828f60b8d5afd6b19 Wed Jun 23 14:02:23 CEST 2021 Thomas Gleixner <tglx@linutronix.de> x86/pkru: Remove xstate fiddling from write_pkru()

The PKRU value of a task is stored in task->thread.pkru when the task is
scheduled out. PKRU is restored on schedule in from there. So keeping the
XSAVE buffer up to date is a pointless exercise.

Remove the xstate fiddling and cleanup all related functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.897372712@linutronix.de
H A Dspecial_insns.hdiff 72a6c08c44e4460e39315ca828f60b8d5afd6b19 Wed Jun 23 14:02:23 CEST 2021 Thomas Gleixner <tglx@linutronix.de> x86/pkru: Remove xstate fiddling from write_pkru()

The PKRU value of a task is stored in task->thread.pkru when the task is
scheduled out. PKRU is restored on schedule in from there. So keeping the
XSAVE buffer up to date is a pointless exercise.

Remove the xstate fiddling and cleanup all related functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.897372712@linutronix.de
/linux/arch/x86/kvm/
H A Dx86.cdiff 72a6c08c44e4460e39315ca828f60b8d5afd6b19 Wed Jun 23 14:02:23 CEST 2021 Thomas Gleixner <tglx@linutronix.de> x86/pkru: Remove xstate fiddling from write_pkru()

The PKRU value of a task is stored in task->thread.pkru when the task is
scheduled out. PKRU is restored on schedule in from there. So keeping the
XSAVE buffer up to date is a pointless exercise.

Remove the xstate fiddling and cleanup all related functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.897372712@linutronix.de