Merge branch 'for-3.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...

[firefly-linux-kernel-4.4.55.git] / arch / tile / Kconfig

diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 6ad6219fc47e0bf4a0751ec862dffa2a6a115fd3..fe128816c448a5f593f419c8b695461bebcd74ec 100644 (file)
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -48,6 +48,14 @@ config NEED_PER_CPU_PAGE_FIRST_CHUNK
 config SYS_SUPPORTS_HUGETLBFS
        def_bool y
 
+# Support for additional huge page sizes besides HPAGE_SIZE.
+# The software support is currently only present in the TILE-Gx
+# hypervisor. TILEPro in any case does not support page sizes
+# larger than the default HPAGE_SIZE.
+config HUGETLB_SUPER_PAGES
+       depends on HUGETLB_PAGE && TILEGX
+       def_bool y
+
 # FIXME: tilegx can implement a more efficient rwsem.
 config RWSEM_GENERIC_SPINLOCK
        def_bool y
@@ -107,16 +115,14 @@ config HVC_TILE
        select HVC_DRIVER
        def_bool y
 
-# Please note: TILE-Gx support is not yet finalized; this is
-# the preliminary support.  TILE-Gx drivers are only provided
-# with the alpha or beta test versions for Tilera customers.
 config TILEGX
-       depends on EXPERIMENTAL
        bool "Building with TILE-Gx (64-bit) compiler and toolchain"
 
+config TILEPRO
+       def_bool !TILEGX
+
 config 64BIT
-       depends on TILEGX
-       def_bool y
+       def_bool TILEGX
 
 config ARCH_DEFCONFIG
        string
@@ -137,6 +143,31 @@ config NR_CPUS
          smaller kernel memory footprint results from using a smaller
          value on chips with fewer tiles.
 
+if TILEGX
+
+choice
+       prompt "Kernel page size"
+       default PAGE_SIZE_64KB
+       help
+         This lets you select the page size of the kernel.  For best
+         performance on memory-intensive applications, a page size of 64KB
+         is recommended.  For workloads involving many small files, many
+         connections, etc., it may be better to select 16KB, which uses
+         memory more efficiently at some cost in TLB performance.
+
+         Note that this option is TILE-Gx specific; currently
+         TILEPro page size is set by rebuilding the hypervisor.
+
+config PAGE_SIZE_16KB
+       bool "16KB"
+
+config PAGE_SIZE_64KB
+       bool "64KB"
+
+endchoice
+
+endif
+
 source "kernel/Kconfig.hz"
 
 config KEXEC