diff options
| author | bibo,mao <bibo.mao@intel.com> | 2006-10-21 18:37:02 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-10-21 18:37:02 +0200 |
| commit | 7a71cef780404e8c90d23b1131142e158d94354b (patch) | |
| tree | 7e961918153726f031fabd40f2bf695c24cd8c90 /include | |
| parent | 690a973f48b6ba2954465992c08e65059c8374fe (diff) | |
| download | op-kernel-dev-7a71cef780404e8c90d23b1131142e158d94354b.zip op-kernel-dev-7a71cef780404e8c90d23b1131142e158d94354b.tar.gz | |
[PATCH] x86-64: x86_64 add NX mask for PTE entry
If function change_page_attr_addr calls revert_page to revert
to original pte value, mk_pte_phys does not mask NX bit. If NX bit
is set on no NX hardware supported x86_64 machine, there is will
be RSVD type page fault and system will crash. This patch adds NX
mask bit for PTE entry.
Signed-off-by: bibo,mao <bibo.mao@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86_64/pgtable.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h index 6899e77..0555c1c 100644 --- a/include/asm-x86_64/pgtable.h +++ b/include/asm-x86_64/pgtable.h @@ -366,6 +366,7 @@ static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot) { pte_t pte; pte_val(pte) = physpage | pgprot_val(pgprot); + pte_val(pte) &= __supported_pte_mask; return pte; } |
