diff options
Diffstat (limited to 'arch/x86/power/hibernate_64.c')
| -rw-r--r-- | arch/x86/power/hibernate_64.c | 63 |
1 files changed, 41 insertions, 22 deletions
diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c index ded2e8272382..6a61194ffd58 100644 --- a/arch/x86/power/hibernate_64.c +++ b/arch/x86/power/hibernate_64.c @@ -16,6 +16,7 @@ #include <crypto/hash.h> +#include <asm/e820/api.h> #include <asm/init.h> #include <asm/proto.h> #include <asm/page.h> @@ -49,6 +50,7 @@ static int set_up_temporary_text_mapping(pgd_t *pgd) { pmd_t *pmd; pud_t *pud; + p4d_t *p4d; /* * The new mapping only has to cover the page containing the image @@ -63,6 +65,13 @@ static int set_up_temporary_text_mapping(pgd_t *pgd) * the virtual address space after switching over to the original page * tables used by the image kernel. */ + + if (IS_ENABLED(CONFIG_X86_5LEVEL)) { + p4d = (p4d_t *)get_safe_page(GFP_ATOMIC); + if (!p4d) + return -ENOMEM; + } + pud = (pud_t *)get_safe_page(GFP_ATOMIC); if (!pud) return -ENOMEM; @@ -75,8 +84,13 @@ static int set_up_temporary_text_mapping(pgd_t *pgd) __pmd((jump_address_phys & PMD_MASK) | __PAGE_KERNEL_LARGE_EXEC)); set_pud(pud + pud_index(restore_jump_address), __pud(__pa(pmd) | _KERNPG_TABLE)); - set_pgd(pgd + pgd_index(restore_jump_address), - __pgd(__pa(pud) | _KERNPG_TABLE)); + if (IS_ENABLED(CONFIG_X86_5LEVEL)) { + set_p4d(p4d + p4d_index(restore_jump_address), __p4d(__pa(pud) | _KERNPG_TABLE)); + set_pgd(pgd + pgd_index(restore_jump_address), __pgd(__pa(p4d) | _KERNPG_TABLE)); + } else { + /* No p4d for 4-level paging: point the pgd to the pud page table */ + set_pgd(pgd + pgd_index(restore_jump_address), __pgd(__pa(pud) | _KERNPG_TABLE)); + } return 0; } @@ -124,7 +138,10 @@ static int set_up_temporary_mappings(void) static int relocate_restore_code(void) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; + pmd_t *pmd; + pte_t *pte; relocated_restore_code = get_safe_page(GFP_ATOMIC); if (!relocated_restore_code) @@ -134,22 +151,25 @@ static int relocate_restore_code(void) /* Make the page containing the relocated code executable */ pgd = (pgd_t *)__va(read_cr3()) + pgd_index(relocated_restore_code); - pud = pud_offset(pgd, relocated_restore_code); + p4d = p4d_offset(pgd, relocated_restore_code); + if (p4d_large(*p4d)) { + set_p4d(p4d, __p4d(p4d_val(*p4d) & ~_PAGE_NX)); + goto out; + } + pud = pud_offset(p4d, relocated_restore_code); if (pud_large(*pud)) { set_pud(pud, __pud(pud_val(*pud) & ~_PAGE_NX)); - } else { - pmd_t *pmd = pmd_offset(pud, relocated_restore_code); - - if (pmd_large(*pmd)) { - set_pmd(pmd, __pmd(pmd_val(*pmd) & ~_PAGE_NX)); - } else { - pte_t *pte = pte_offset_kernel(pmd, relocated_restore_code); - - set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_NX)); - } + goto out; + } + pmd = pmd_offset(pud, relocated_restore_code); + if (pmd_large(*pmd)) { + set_pmd(pmd, __pmd(pmd_val(*pmd) & ~_PAGE_NX)); + goto out; } + pte = pte_offset_kernel(pmd, relocated_restore_code); + set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_NX)); +out: __flush_tlb_all(); - return 0; } @@ -195,12 +215,12 @@ struct restore_data_record { #if IS_BUILTIN(CONFIG_CRYPTO_MD5) /** - * get_e820_md5 - calculate md5 according to given e820 map + * get_e820_md5 - calculate md5 according to given e820 table * - * @map: the e820 map to be calculated + * @table: the e820 table to be calculated * @buf: the md5 result to be stored to */ -static int get_e820_md5(struct e820map *map, void *buf) +static int get_e820_md5(struct e820_table *table, void *buf) { struct scatterlist sg; struct crypto_ahash *tfm; @@ -213,10 +233,9 @@ static int get_e820_md5(struct e820map *map, void *buf) { AHASH_REQUEST_ON_STACK(req, tfm); - size = offsetof(struct e820map, map) - + sizeof(struct e820entry) * map->nr_map; + size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry) * table->nr_entries; ahash_request_set_tfm(req, tfm); - sg_init_one(&sg, (u8 *)map, size); + sg_init_one(&sg, (u8 *)table, size); ahash_request_set_callback(req, 0, NULL, NULL); ahash_request_set_crypt(req, &sg, buf, size); @@ -231,7 +250,7 @@ static int get_e820_md5(struct e820map *map, void *buf) static void hibernation_e820_save(void *buf) { - get_e820_md5(e820_saved, buf); + get_e820_md5(e820_table_firmware, buf); } static bool hibernation_e820_mismatch(void *buf) @@ -244,7 +263,7 @@ static bool hibernation_e820_mismatch(void *buf) if (!memcmp(result, buf, MD5_DIGEST_SIZE)) return false; - ret = get_e820_md5(e820_saved, result); + ret = get_e820_md5(e820_table_firmware, result); if (ret) return true; |