diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/efi/efi-init.c | 1 | ||||
| -rw-r--r-- | drivers/firmware/efi/efi.c | 23 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efi-init.c b/drivers/firmware/efi/efi-init.c index b2c829e95bd1..3928dbff76d0 100644 --- a/drivers/firmware/efi/efi-init.c +++ b/drivers/firmware/efi/efi-init.c @@ -240,6 +240,7 @@ void __init efi_init(void) * And now, memblock is fully populated, it is time to do capping. */ early_init_dt_check_for_usable_mem_range(); + efi_find_mirror(); efi_esrt_init(); efi_mokvar_table_init(); diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 860534bcfdac..79c232e07de7 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -446,6 +446,29 @@ err_put: subsys_initcall(efisubsys_init); +void __init efi_find_mirror(void) +{ + efi_memory_desc_t *md; + u64 mirror_size = 0, total_size = 0; + + if (!efi_enabled(EFI_MEMMAP)) + return; + + for_each_efi_memory_desc(md) { + 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); +} + /* * Find the efi memory descriptor for a given physical address. Given a * physical address, determine if it exists within an EFI Memory Map entry, |