x86/fpu: Add a pkru argument to copy_uabi_to_xstate()

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commit 2c87767c35 upstream.

In preparation for moving PKRU handling code out of
fpu_copy_uabi_to_guest_fpstate() and into copy_uabi_to_xstate(), add an
argument that copy_uabi_from_kernel_to_xstate() can use to pass the
canonical location of the PKRU value. For
copy_sigframe_from_user_to_xstate() the kernel will actually restore the
PKRU value from the fpstate, but pass in the thread_struct's pkru location
anyways for consistency.

Signed-off-by: Kyle Huey <me@kylehuey.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20221115230932.7126-4-khuey%40kylehuey.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Kyle Huey 2022-11-15 15:09:29 -08:00 • committed by Greg Kroah-Hartman

parent a442736b70

commit bfa72faf69

1 changed files with 13 additions and 3 deletions

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arch/x86/kernel/fpu/xstate.c

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