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authorMatt Fleming <matt.fleming@intel.com>2014-03-05 18:15:37 (GMT)
committerMatt Fleming <matt.fleming@intel.com>2014-03-05 18:15:37 (GMT)
commit994448f1afa6689bafbebaf7412b23b541b41ef5 (patch)
treeb7460c6a9bdadc6554ad7f0da52b5c60403164c1 /arch/x86/mm
parent4fd69331ad227a4d8de26592d017b73e00caca9f (diff)
parent18c46461d9e42d398536055f31f58cdcd2c6347e (diff)
downloadlinux-994448f1afa6689bafbebaf7412b23b541b41ef5.tar.xz
Merge remote-tracking branch 'tip/x86/efi-mixed' into efi-for-mingo
Conflicts: arch/x86/kernel/setup.c arch/x86/platform/efi/efi.c arch/x86/platform/efi/efi_64.c
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/fault.c7
-rw-r--r--arch/x86/mm/pageattr.c12
2 files changed, 14 insertions, 5 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index e7fa28b..a92c4c9 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -584,8 +584,13 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code,
if (error_code & PF_INSTR) {
unsigned int level;
+ pgd_t *pgd;
+ pte_t *pte;
- pte_t *pte = lookup_address(address, &level);
+ pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
+ pgd += pgd_index(address);
+
+ pte = lookup_address_in_pgd(pgd, address, &level);
if (pte && pte_present(*pte) && !pte_exec(*pte))
printk(nx_warning, from_kuid(&init_user_ns, current_uid()));
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index a348868..1585da3 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -323,8 +323,12 @@ static inline pgprot_t static_protections(pgprot_t prot, unsigned long address,
return prot;
}
-static pte_t *__lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
- unsigned int *level)
+/*
+ * Lookup the page table entry for a virtual address in a specific pgd.
+ * Return a pointer to the entry and the level of the mapping.
+ */
+pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
+ unsigned int *level)
{
pud_t *pud;
pmd_t *pmd;
@@ -365,7 +369,7 @@ static pte_t *__lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
*/
pte_t *lookup_address(unsigned long address, unsigned int *level)
{
- return __lookup_address_in_pgd(pgd_offset_k(address), address, level);
+ return lookup_address_in_pgd(pgd_offset_k(address), address, level);
}
EXPORT_SYMBOL_GPL(lookup_address);
@@ -373,7 +377,7 @@ static pte_t *_lookup_address_cpa(struct cpa_data *cpa, unsigned long address,
unsigned int *level)
{
if (cpa->pgd)
- return __lookup_address_in_pgd(cpa->pgd + pgd_index(address),
+ return lookup_address_in_pgd(cpa->pgd + pgd_index(address),
address, level);
return lookup_address(address, level);