diff options
Diffstat (limited to 'arch/x86/kernel/head_32.S')
| -rw-r--r-- | arch/x86/kernel/head_32.S | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index abe6df15a8fb..30f9cb2c0b55 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -512,11 +512,18 @@ ENTRY(initial_code) ENTRY(setup_once_ref) .long setup_once +#ifdef CONFIG_PAGE_TABLE_ISOLATION +#define PGD_ALIGN (2 * PAGE_SIZE) +#define PTI_USER_PGD_FILL 1024 +#else +#define PGD_ALIGN (PAGE_SIZE) +#define PTI_USER_PGD_FILL 0 +#endif /* * BSS section */ __PAGE_ALIGNED_BSS - .align PAGE_SIZE + .align PGD_ALIGN #ifdef CONFIG_X86_PAE .globl initial_pg_pmd initial_pg_pmd: @@ -526,14 +533,17 @@ initial_pg_pmd: initial_page_table: .fill 1024,4,0 #endif + .align PGD_ALIGN initial_pg_fixmap: .fill 1024,4,0 -.globl empty_zero_page -empty_zero_page: - .fill 4096,1,0 .globl swapper_pg_dir + .align PGD_ALIGN swapper_pg_dir: .fill 1024,4,0 + .fill PTI_USER_PGD_FILL,4,0 +.globl empty_zero_page +empty_zero_page: + .fill 4096,1,0 EXPORT_SYMBOL(empty_zero_page) /* @@ -542,7 +552,7 @@ EXPORT_SYMBOL(empty_zero_page) #ifdef CONFIG_X86_PAE __PAGE_ALIGNED_DATA /* Page-aligned for the benefit of paravirt? */ - .align PAGE_SIZE + .align PGD_ALIGN ENTRY(initial_page_table) .long pa(initial_pg_pmd+PGD_IDENT_ATTR),0 /* low identity map */ # if KPMDS == 3 |