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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2016-02-12 22:02:37 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-18 19:46:32 +0100 |
| commit | 878ba03932d757ce4e954db4defec74a0de0435b (patch) | |
| tree | 9d159535d7d6c2f76487c4c23ad1547b4cb5c089 /mm/mprotect.c | |
| parent | x86/mm/pkeys: Allow kernel to modify user pkey rights register (diff) | |
| download | linux-878ba03932d757ce4e954db4defec74a0de0435b.tar.xz linux-878ba03932d757ce4e954db4defec74a0de0435b.zip | |
x86/mm/pkeys: Create an x86 arch_calc_vm_prot_bits() for VMA flags
calc_vm_prot_bits() takes PROT_{READ,WRITE,EXECUTE} bits and
turns them in to the vma->vm_flags/VM_* bits. We need to do a
similar thing for protection keys.
We take a protection key (4 bits) and encode it in to the 4
VM_PKEY_* bits.
Note: this code is not new. It was simply a part of the
mprotect_pkey() patch in the past. I broke it out for use
in the execute-only support.
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/20160212210237.CFB94AD5@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/mprotect.c')
0 files changed, 0 insertions, 0 deletions