Commit 7a71cef7 authored Oct 21, 2006 by bibo,mao Committed by Andi Kleen Oct 21, 2006

[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>

parent 690a973f

include/asm-x86_64/pgtable.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}