diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c index 4b9face59..9a1243639 100644 --- a/grub-core/kern/ieee1275/init.c +++ b/grub-core/kern/ieee1275/init.c @@ -502,6 +502,20 @@ regions_claim (grub_uint64_t addr, grub_uint64_t len, grub_memory_type_t type, } } } + + /* Honor alignment restrictions on candidate addr */ + if (rcr->align) + { + grub_uint64_t align_addr = ALIGN_UP (addr, rcr->align); + grub_uint64_t d = align_addr - addr; + + if (d > len) + return 0; + + len -= d; + addr = align_addr; + } + if (rcr->flags & GRUB_MM_ADD_REGION_CONSECUTIVE && len < rcr->total) return 0; diff --git a/include/grub/ieee1275/alloc.h b/include/grub/ieee1275/alloc.h index f3065ff31..e314c989d 100644 --- a/include/grub/ieee1275/alloc.h +++ b/include/grub/ieee1275/alloc.h @@ -30,6 +30,7 @@ struct regions_claim_request { grub_uint32_t total; /* number of requested bytes */ bool init_region; /* whether to add memory to the heap using grub_mm_init_region() */ grub_uint64_t addr; /* result address */ + grub_size_t align; /* alignment restrictions */ }; #endif /* GRUB_IEEE1275_ALLOC_HEADER */