// SPDX-License-Identifier: GPL-2.0 /* * x86-specific bits of KMSAN shadow implementation. * * Copyright (C) 2022 Google LLC * Author: Alexander Potapenko <glider@google.com> */ #include <asm/cpu_entry_area.h> #include <linux/percpu-defs.h> /* * Addresses within the CPU entry area (including e.g. exception stacks) do not * have struct page entries corresponding to them, so they need separate * handling. * arch_kmsan_get_meta_or_null() (declared in the header) maps the addresses in * CPU entry area to addresses in cpu_entry_area_shadow/cpu_entry_area_origin. */ DEFINE_PER_CPU(char[CPU_ENTRY_AREA_SIZE], cpu_entry_area_shadow); DEFINE_PER_CPU(char[CPU_ENTRY_AREA_SIZE], cpu_entry_area_origin);