summaryrefslogtreecommitdiff
path: root/arch/arm64/mm/mmu.c
diff options
context:
space:
mode:
authorCatalin Marinas <catalin.marinas@arm.com>2013-07-01 11:20:58 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2013-07-01 11:20:58 +0100
commitaa729dccb5e8dfbc78e2e235b8754d6acccee731 (patch)
treef6123726a25957481e2528b9b6b0d0cfd992a5fb /arch/arm64/mm/mmu.c
parentee877b5321c4dfee9dc9f2a12b19ddcd33149f6a (diff)
parentaf07484863e0c20796081e57093886c22dc16705 (diff)
Merge branch 'for-next/hugepages' of git://git.linaro.org/people/stevecapper/linux into upstream-hugepages
* 'for-next/hugepages' of git://git.linaro.org/people/stevecapper/linux: ARM64: mm: THP support. ARM64: mm: Raise MAX_ORDER for 64KB pages and THP. ARM64: mm: HugeTLB support. ARM64: mm: Move PTE_PROT_NONE bit. ARM64: mm: Make PAGE_NONE pages read only and no-execute. ARM64: mm: Restore memblock limit when map_mem finished. mm: thp: Correct the HPAGE_PMD_ORDER check. x86: mm: Remove general hugetlb code from x86. mm: hugetlb: Copy general hugetlb code from x86 to mm. x86: mm: Remove x86 version of huge_pmd_share. mm: hugetlb: Copy huge_pmd_share from x86 to mm. Conflicts: arch/arm64/Kconfig arch/arm64/include/asm/pgtable-hwdef.h arch/arm64/include/asm/pgtable.h
Diffstat (limited to 'arch/arm64/mm/mmu.c')
-rw-r--r--arch/arm64/mm/mmu.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 80a369eab637..a8d1059b91b2 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -297,6 +297,16 @@ static void __init map_mem(void)
{
struct memblock_region *reg;
+ /*
+ * Temporarily limit the memblock range. We need to do this as
+ * create_mapping requires puds, pmds and ptes to be allocated from
+ * memory addressable from the initial direct kernel mapping.
+ *
+ * The initial direct kernel mapping, located at swapper_pg_dir,
+ * gives us PGDIR_SIZE memory starting from PHYS_OFFSET (aligned).
+ */
+ memblock_set_current_limit((PHYS_OFFSET & PGDIR_MASK) + PGDIR_SIZE);
+
/* map all the memory banks */
for_each_memblock(memory, reg) {
phys_addr_t start = reg->base;
@@ -307,6 +317,9 @@ static void __init map_mem(void)
create_mapping(start, __phys_to_virt(start), end - start);
}
+
+ /* Limit no longer required. */
+ memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE);
}
/*
@@ -317,12 +330,6 @@ void __init paging_init(void)
{
void *zero_page;
- /*
- * Maximum PGDIR_SIZE addressable via the initial direct kernel
- * mapping in swapper_pg_dir.
- */
- memblock_set_current_limit((PHYS_OFFSET & PGDIR_MASK) + PGDIR_SIZE);
-
init_mem_pgprot();
map_mem();