diff options
Diffstat (limited to 'drivers/firmware/efi/libstub/arm64-stub.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/arm64-stub.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index 60973e84d7ab..259e4b852d63 100644 --- a/drivers/firmware/efi/libstub/arm64-stub.c +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -19,6 +19,14 @@ efi_status_t check_platform_features(void) { u64 tg; + /* + * If we have 48 bits of VA space for TTBR0 mappings, we can map the + * UEFI runtime regions 1:1 and so calling SetVirtualAddressMap() is + * unnecessary. + */ + if (VA_BITS_MIN >= 48) + efi_novamap = true; + /* UEFI mandates support for 4 KB granularity, no need to check */ if (IS_ENABLED(CONFIG_ARM64_4K_PAGES)) return EFI_SUCCESS; @@ -42,26 +50,17 @@ efi_status_t check_platform_features(void) */ static bool check_image_region(u64 base, u64 size) { - unsigned long map_size, desc_size, buff_size; - efi_memory_desc_t *memory_map; - struct efi_boot_memmap map; + struct efi_boot_memmap *map; efi_status_t status; bool ret = false; int map_offset; - map.map = &memory_map; - map.map_size = &map_size; - map.desc_size = &desc_size; - map.desc_ver = NULL; - map.key_ptr = NULL; - map.buff_size = &buff_size; - - status = efi_get_memory_map(&map); + status = efi_get_memory_map(&map, false); if (status != EFI_SUCCESS) return false; - for (map_offset = 0; map_offset < map_size; map_offset += desc_size) { - efi_memory_desc_t *md = (void *)memory_map + map_offset; + for (map_offset = 0; map_offset < map->map_size; map_offset += map->desc_size) { + efi_memory_desc_t *md = (void *)map->map + map_offset; u64 end = md->phys_addr + md->num_pages * EFI_PAGE_SIZE; /* @@ -74,7 +73,7 @@ static bool check_image_region(u64 base, u64 size) } } - efi_bs_call(free_pool, memory_map); + efi_bs_call(free_pool, map); return ret; } |