memblock, nobootmem: add memblock_virt_alloc_low()
The new memblock_virt APIs are used to replaced old bootmem API.
We need to allocate page below 4G for swiotlb.
That should fix regression on Andrew's system that is using swiotlb.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 1e8b030..b0df976 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -731,7 +731,7 @@
kernel_data.end = virt_to_phys(_end - 1);
for_each_memblock(memory, region) {
- res = memblock_virt_alloc(sizeof(*res), 0);
+ res = memblock_virt_alloc_low(sizeof(*res), 0);
res->name = "System RAM";
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index 2fae55d..b388223 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -175,6 +175,27 @@
NUMA_NO_NODE);
}
+#ifndef ARCH_LOW_ADDRESS_LIMIT
+#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
+#endif
+
+static inline void * __init memblock_virt_alloc_low(
+ phys_addr_t size, phys_addr_t align)
+{
+ return memblock_virt_alloc_try_nid(size, align,
+ BOOTMEM_LOW_LIMIT,
+ ARCH_LOW_ADDRESS_LIMIT,
+ NUMA_NO_NODE);
+}
+static inline void * __init memblock_virt_alloc_low_nopanic(
+ phys_addr_t size, phys_addr_t align)
+{
+ return memblock_virt_alloc_try_nid_nopanic(size, align,
+ BOOTMEM_LOW_LIMIT,
+ ARCH_LOW_ADDRESS_LIMIT,
+ NUMA_NO_NODE);
+}
+
static inline void * __init memblock_virt_alloc_from_nopanic(
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
{
@@ -238,6 +259,22 @@
return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
}
+static inline void * __init memblock_virt_alloc_low(
+ phys_addr_t size, phys_addr_t align)
+{
+ if (!align)
+ align = SMP_CACHE_BYTES;
+ return __alloc_bootmem_low(size, align, BOOTMEM_LOW_LIMIT);
+}
+
+static inline void * __init memblock_virt_alloc_low_nopanic(
+ phys_addr_t size, phys_addr_t align)
+{
+ if (!align)
+ align = SMP_CACHE_BYTES;
+ return __alloc_bootmem_low_nopanic(size, align, BOOTMEM_LOW_LIMIT);
+}
+
static inline void * __init memblock_virt_alloc_from_nopanic(
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
{
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 2e1c102..b604b83 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -172,7 +172,7 @@
/*
* Get the overflow emergency buffer
*/
- v_overflow_buffer = memblock_virt_alloc_nopanic(
+ v_overflow_buffer = memblock_virt_alloc_low_nopanic(
PAGE_ALIGN(io_tlb_overflow),
PAGE_SIZE);
if (!v_overflow_buffer)
@@ -220,7 +220,7 @@
bytes = io_tlb_nslabs << IO_TLB_SHIFT;
/* Get IO TLB memory from the low pages */
- vstart = memblock_virt_alloc_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE);
+ vstart = memblock_virt_alloc_low_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE);
if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose))
return;