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-rw-r--r--arch/arm/mm/mmu.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index f7c741358f37..7edc6c3f4bd9 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1168,10 +1168,29 @@ 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)
/*