diff options
Diffstat (limited to 'arch/arm/mm/mmu.c')
| -rw-r--r-- | arch/arm/mm/mmu.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index d9a0038774a6..25da9b2d9610 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1177,10 +1177,29 @@ void __init adjust_lowmem_bounds(void) */ vmalloc_limit = (u64)(uintptr_t)vmalloc_min - PAGE_OFFSET + PHYS_OFFSET; + /* + * The first usable region must be PMD aligned. Mark its start + * as MEMBLOCK_NOMAP if it isn't + */ + for_each_memblock(memory, reg) { + if (!memblock_is_nomap(reg)) { + if (!IS_ALIGNED(reg->base, PMD_SIZE)) { + phys_addr_t len; + + len = round_up(reg->base, PMD_SIZE) - reg->base; + memblock_mark_nomap(reg->base, len); + } + break; + } + } + for_each_memblock(memory, reg) { phys_addr_t block_start = reg->base; phys_addr_t block_end = reg->base + reg->size; + if (memblock_is_nomap(reg)) + continue; + if (reg->base < vmalloc_limit) { if (block_end > lowmem_limit) /* |