x86/cpu: Write the default PKRU value when enabling PKE

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In preparation of making the PKRU management more independent from XSTATES,
write the default PKRU value into the hardware right after enabling PKRU in
CR4. This ensures that switch_to() and copy_thread() have the correct
setting for init task and the per CPU idle threads right away.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121455.622983906@linutronix.de

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Thomas Gleixner 2021-06-23 14:02:10 +02:00 • committed by Borislav Petkov

parent ff7ebff47c

commit fa8c84b77a

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arch/x86/kernel/cpu/common.c

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