diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/setup.c | 3 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 21 |
2 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 39ca113676fe..d3b95b89e9b2 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1105,6 +1105,9 @@ void __init setup_arch(char **cmdline_p) memblock_set_current_limit(ISA_END_ADDRESS); memblock_x86_fill(); + if (efi_enabled(EFI_BOOT)) + efi_find_mirror(); + /* * The EFI specification says that boot service code won't be called * after ExitBootServices(). This is, in fact, a lie. diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 3b984c3aa1b0..c1c382c58c60 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -117,6 +117,27 @@ void efi_get_time(struct timespec *now) now->tv_nsec = 0; } +void __init efi_find_mirror(void) +{ + void *p; + u64 mirror_size = 0, total_size = 0; + + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { + efi_memory_desc_t *md = p; + unsigned long long start = md->phys_addr; + unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; + + total_size += size; + if (md->attribute & EFI_MEMORY_MORE_RELIABLE) { + memblock_mark_mirror(start, size); + mirror_size += size; + } + } + if (mirror_size) + pr_info("Memory: %lldM/%lldM mirrored memory\n", + mirror_size>>20, total_size>>20); +} + /* * Tell the kernel about the EFI memory map. This might include * more than the max 128 entries that can fit in the e820 legacy |