x86: honor _PAGE_PSE bit on page walks

[ tglx: arch/x86 adaptation ] Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
mariux64 · Oct 19, 2007 · b1992df · b1992df
1 parent 1f503e7
commit b1992df
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
@@ -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)];

diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
@@ -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;