From: Jan Beulich <jbeulich@novell.com>
Date: Fri, 19 Oct 2007 18:35:03 +0000 (+0200)
Subject: x86: honor _PAGE_PSE bit on page walks
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b1992df3f070475b243b12ca1241a5938ef5f9bc;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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>
---

diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6555c3d14371..c9a03f73986e 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -564,7 +564,8 @@ no_context:
 		 * 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
index a881f0796169..1e631745ca41 100644
--- 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;