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Commit b1992df3 authored by Jan Beulich's avatar Jan Beulich Committed by Thomas Gleixner
Browse files

x86: honor _PAGE_PSE bit on page walks 



[ tglx: arch/x86 adaptation ]

Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 1f503e77

arch/x86/mm/fault_32.c

+2 −1
Original line number Diff line number Diff line
@@ -564,7 +564,8 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs, 
		 * it's allocated already.

		 */

		if ((page >> PAGE_SHIFT) < max_low_pfn

		    && (page & _PAGE_PRESENT)) {

		    && (page & _PAGE_PRESENT)

		    && !(page & _PAGE_PSE)) {

			page &= PAGE_MASK;

			page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)

			                                         & (PTRS_PER_PTE - 1)];

arch/x86/mm/fault_64.c

+1 −1
Original line number Diff line number Diff line
@@ -169,7 +169,7 @@ void dump_pagetable(unsigned long address) 
	pmd = pmd_offset(pud, address);

	if (bad_address(pmd)) goto bad;

	printk("PMD %lx ", pmd_val(*pmd));

	if (!pmd_present(*pmd))	goto ret;	 

	if (!pmd_present(*pmd) || pmd_large(*pmd)) goto ret;



	pte = pte_offset_kernel(pmd, address);

	if (bad_address(pte)) goto bad;