mm/core, x86/mm/pkeys: Add arch_validate_pkey()
authorDave Hansen <dave.hansen@linux.intel.com>
Fri, 12 Feb 2016 21:02:32 +0000 (13:02 -0800)
committerIngo Molnar <mingo@kernel.org>
Thu, 18 Feb 2016 18:46:31 +0000 (19:46 +0100)
commit66d375709d2c891acc639538fd3179fa0cbb0daf
treee4130fdef51a5d4820e8e870d34a42d7b384c9b0
parente6bfb70959a0ca6ddedb29e779a293c6f71ed0e7
mm/core, x86/mm/pkeys: Add arch_validate_pkey()

The syscall-level code is passed a protection key and need to
return an appropriate error code if the protection key is bogus.
We will be using this in subsequent patches.

Note that this also begins a series of arch-specific calls that
we need to expose in otherwise arch-independent code.  We create
a linux/pkeys.h header where we will put *all* the stubs for
these functions.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20160212210232.774EEAAB@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/Kconfig
arch/x86/include/asm/pkeys.h [new file with mode: 0644]
include/linux/pkeys.h [new file with mode: 0644]
mm/Kconfig