ARC: Make vmalloc size configurable

[cascardo/linux.git] / arch / arc / Kconfig

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 4f1482a..30ad634 100644 (file)
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -492,6 +492,17 @@ config ARCH_DMA_ADDR_T_64BIT
 config ARC_PLAT_NEEDS_PHYS_TO_DMA
        bool
 
+config ARC_KVADDR_SIZE
+       int "Kernel Virtaul Address Space size (MB)"
+       range 0 512
+       default "256"
+       help
+         The kernel address space is carved out of 256MB of translated address
+         space for catering to vmalloc, modules, pkmap, fixmap. This however may
+         not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
+         this to be stretched to 512 MB (by extending into the reserved
+         kernel-user gutter)
+
 config ARC_CURR_IN_REG
        bool "Dedicate Register r25 for current_task pointer"
        default y