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linux-next/arch/xtensa/mm/Makefile
Max Filippov c633544a61 xtensa: add support for KASAN
Cover kernel addresses above 0x90000000 by the shadow map. Enable
HAVE_ARCH_KASAN when MMU is enabled. Provide kasan_early_init that fills
shadow map with writable copies of kasan_zero_page. Call
kasan_early_init right after mmu initialization in the setup_arch.
Provide kasan_init that allocates proper shadow map pages from the
memblock and puts these pages into the shadow map for addresses from
VMALLOC area to the end of KSEG. Call kasan_init right after memblock
initialization. Don't use KASAN for the boot code, MMU and KASAN
initialization and page fault handler. Make kernel stack size 4 times
larger when KASAN is enabled to avoid stack overflows.
GCC 7.3, 8 or newer is required to build the xtensa kernel with KASAN.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2017-12-16 22:37:12 -08:00

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Makefile

#
# Makefile for the Linux/Xtensa-specific parts of the memory manager.
#
obj-y := init.o misc.o
obj-$(CONFIG_MMU) += cache.o fault.o ioremap.o mmu.o tlb.o
obj-$(CONFIG_HIGHMEM) += highmem.o
obj-$(CONFIG_KASAN) += kasan_init.o
KASAN_SANITIZE_fault.o := n
KASAN_SANITIZE_kasan_init.o := n
KASAN_SANITIZE_mmu.o := n