powerpc/uaccess: Implement user_read_access_begin and user_write_access_begin

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Add support for selective read or write user access with
user_read_access_begin/end and user_write_access_begin/end.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6c83af0f0809ef2a955c39ac622767f6cbede035.1585898438.git.christophe.leroy@c-s.fr

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Christophe Leroy 2020-04-03 07:20:53 +00:00 • committed by Michael Ellerman

parent 1f59cc3482

commit 4fe5cda9f8

3 changed files with 37 additions and 3 deletions

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4

arch/powerpc/include/asm/book3s/32/kup.h

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arch/powerpc/include/asm/kup.h

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arch/powerpc/include/asm/uaccess.h

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