Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / arch / x86 / platform / efi / efi_64.c

diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index 6a151ce70e865caadde95c859855c4b63283ad4b..2dd15e967c3f5257c530d53c7d4f51f2e3165190 100644 (file)
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -135,7 +135,9 @@ pgd_t * __init efi_call_phys_prolog(void)
                                pud[j] = *pud_offset(p4d_k, vaddr);
                        }
                }
+               pgd_offset_k(pgd * PGDIR_SIZE)->pgd &= ~_PAGE_NX;
        }
+
 out:
        __flush_tlb_all();
 
@@ -196,6 +198,9 @@ static pgd_t *efi_pgd;
  * because we want to avoid inserting EFI region mappings (EFI_VA_END
  * to EFI_VA_START) into the standard kernel page tables. Everything
  * else can be shared, see efi_sync_low_kernel_mappings().
+ *
+ * We don't want the pgd on the pgd_list and cannot use pgd_alloc() for the
+ * allocation.
  */
 int __init efi_alloc_page_tables(void)
 {
@@ -208,7 +213,7 @@ int __init efi_alloc_page_tables(void)
                return 0;
 
        gfp_mask = GFP_KERNEL | __GFP_ZERO;
-       efi_pgd = (pgd_t *)__get_free_page(gfp_mask);
+       efi_pgd = (pgd_t *)__get_free_pages(gfp_mask, PGD_ALLOCATION_ORDER);
        if (!efi_pgd)
                return -ENOMEM;