x86/pkeys: Move read_pkru() and write_pkru()

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write_pkru() was originally used just to write to the PKRU register.  It
was mercifully short and sweet and was not out of place in pgtable.h with
some other pkey-related code.

But, later work included a requirement to also modify the task XSAVE
buffer when updating the register.  This really is more related to the
XSAVE architecture than to paging.

Move the read/write_pkru() to asm/pkru.h.  pgtable.h won't miss them.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121455.102647114@linutronix.de

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Dave Hansen 2021-06-23 14:02:05 +02:00 • committed by Borislav Petkov

parent a75c52896b

commit 784a46618f

7 changed files with 67 additions and 56 deletions

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1

arch/x86/include/asm/fpu/xstate.h

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arch/x86/include/asm/pgtable.h

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arch/x86/include/asm/pkru.h

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arch/x86/kernel/process_64.c

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arch/x86/kvm/svm/sev.c

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arch/x86/kvm/x86.c

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arch/x86/mm/pkeys.c

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