Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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

arch/sparc/Kconfig

+18 −0
Original line number Diff line number Diff line
@@ -89,6 +89,10 @@ config ARCH_DEFCONFIG 
config ARCH_PROC_KCORE_TEXT

	def_bool y



config ARCH_ATU

	bool

	default y if SPARC64



config IOMMU_HELPER

	bool

	default y if SPARC64
@@ -304,6 +308,20 @@ config ARCH_SPARSEMEM_ENABLE 
config ARCH_SPARSEMEM_DEFAULT

	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"



if SPARC64