diff options
| -rw-r--r-- | arch/x86/platform/efi/quirks.c | 6 | ||||
| -rw-r--r-- | drivers/firmware/efi/memmap.c | 11 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c index f14b7a9da24b..10aca63a50d7 100644 --- a/arch/x86/platform/efi/quirks.c +++ b/arch/x86/platform/efi/quirks.c @@ -201,8 +201,12 @@ void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size) return; } + size += addr % EFI_PAGE_SIZE; + size = round_up(size, EFI_PAGE_SIZE); + addr = round_down(addr, EFI_PAGE_SIZE); + mr.range.start = addr; - mr.range.end = addr + size; + mr.range.end = addr + size - 1; mr.attribute = md.attribute | EFI_MEMORY_RUNTIME; num_entries = efi_memmap_split_count(&md, &mr.range); diff --git a/drivers/firmware/efi/memmap.c b/drivers/firmware/efi/memmap.c index cd96086fd851..f03ddecd232b 100644 --- a/drivers/firmware/efi/memmap.c +++ b/drivers/firmware/efi/memmap.c @@ -225,6 +225,17 @@ void __init efi_memmap_insert(struct efi_memory_map *old_memmap, void *buf, m_end = mem->range.end; m_attr = mem->attribute; + /* + * The EFI memory map deals with regions in EFI_PAGE_SIZE + * units. Ensure that the region described by 'mem' is aligned + * correctly. + */ + if (!IS_ALIGNED(m_start, EFI_PAGE_SIZE) || + !IS_ALIGNED(m_end + 1, EFI_PAGE_SIZE)) { + WARN_ON(1); + return; + } + for (old = old_memmap->map, new = buf; old < old_memmap->map_end; old += old_memmap->desc_size, new += old_memmap->desc_size) { |