Commit c88c545b authored by Dave Kleikamp's avatar Dave Kleikamp Committed by David S. Miller

sparc64: Add FORCE_MAX_ZONEORDER and default to 13

This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: default avatarDave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: default avatarTushar Dave <tushar.n.dave@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 87a349f9
...@@ -89,6 +89,10 @@ config ARCH_DEFCONFIG ...@@ -89,6 +89,10 @@ config ARCH_DEFCONFIG
config ARCH_PROC_KCORE_TEXT config ARCH_PROC_KCORE_TEXT
def_bool y def_bool y
config ARCH_ATU
bool
default y if SPARC64
config IOMMU_HELPER config IOMMU_HELPER
bool bool
default y if SPARC64 default y if SPARC64
...@@ -304,6 +308,20 @@ config ARCH_SPARSEMEM_ENABLE ...@@ -304,6 +308,20 @@ config ARCH_SPARSEMEM_ENABLE
config ARCH_SPARSEMEM_DEFAULT config ARCH_SPARSEMEM_DEFAULT
def_bool y if SPARC64 def_bool y if SPARC64
config FORCE_MAX_ZONEORDER
int "Maximum zone order"
default "13"
help
The kernel memory allocator divides physically contiguous memory
blocks into "zones", where each zone is a power of two number of
pages. This option selects the largest power of two that the kernel
keeps in the memory allocator. If you need to allocate very large
blocks of physically contiguous memory, then you may need to
increase this value.
This config option is actually maximum order plus one. For example,
a value of 13 means that the largest free memory block is 2^12 pages.
source "mm/Kconfig" source "mm/Kconfig"
if SPARC64 if SPARC64
......
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