This reverts commit 54fc3c681ded9437e4548e2501dc1136b23cfa9a
which does not allow 1:1 mapping even for the system RAM which
is usually possible.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
arch/powerpc/platforms/pseries/iommu.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platforms/pseries/iommu.c
index 49b401536d29..64385d6f33c2 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -1094,15 +1094,6 @@ static phys_addr_t ddw_memory_hotplug_max(void)
phys_addr_t max_addr = memory_hotplug_max();
struct device_node *memory;
- /*
- * The "ibm,pmemory" can appear anywhere in the address space.
- * Assuming it is still backed by page structs, set the upper limit
- * for the huge DMA window as MAX_PHYSMEM_BITS.
- */
- if (of_find_node_by_type(NULL, "ibm,pmemory"))
- return (sizeof(phys_addr_t) * 8 <= MAX_PHYSMEM_BITS) ?
- (phys_addr_t) -1 : (1ULL << MAX_PHYSMEM_BITS);
-
for_each_node_by_type(memory, "memory") {
unsigned long start, size;
int n_mem_addr_cells, n_mem_size_cells, len;
--
2.30.2
