linux/arch/xtensa/mm/Makefile
Max Filippov a8f0c31fa8 xtensa: noMMU: allow handling protection faults
Many xtensa CPU cores without full MMU still have memory protection
features capable of raising exceptions for invalid instruction
fetches/data access. Allow handling such exceptions. This improves
behavior of processes that pass invalid memory pointers to syscalls in
noMMU configs: in case of exception the kernel instead of killing the
process is now able to return -EINVAL from a syscall.

Introduce CONFIG_PFAULT that controls whether protection fault code is
enabled and register handlers for common memory protection exceptions
when it is enabled.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2022-05-01 19:51:21 -07:00

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Makefile

# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for the Linux/Xtensa-specific parts of the memory manager.
#
obj-y := init.o misc.o
obj-$(CONFIG_PFAULT) += fault.o
obj-$(CONFIG_MMU) += cache.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