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acrn-kernel/arch/x86/mm/pf_in.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 14:55:05 +08:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
x86: mmiotrace - trace memory mapped IO Mmiotrace is a tool for trapping memory mapped IO (MMIO) accesses within the kernel. It is used for debugging and especially for reverse engineering evil binary drivers. Mmiotrace works by wrapping the ioremap family of kernel functions and marking the returned pages as not present. Access to the IO memory triggers a page fault, which will be handled by mmiotrace's custom page fault handler. This will single-step the faulted instruction with the MMIO page marked as present. Access logs are directed to user space via relay and debug_fs. This page fault approach is necessary, because binary drivers have readl/writel etc. calls inlined and therefore extremely difficult to trap with with e.g. kprobes. This patch depends on the custom page fault handlers patch. Signed-off-by: Pekka Paalanen <pq@iki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-13 03:20:56 +08:00
/*
* Fault Injection Test harness (FI)
* Copyright (C) Intel Crop.
*/
#ifndef __PF_H_
#define __PF_H_
enum reason_type {
NOT_ME, /* page fault is not in regions */
NOTHING, /* access others point in regions */
REG_READ, /* read from addr to reg */
REG_WRITE, /* write from reg to addr */
IMM_WRITE, /* write from imm to addr */
OTHERS /* Other instructions can not intercept */
};
enum reason_type get_ins_type(unsigned long ins_addr);
unsigned int get_ins_mem_width(unsigned long ins_addr);
unsigned long get_ins_reg_val(unsigned long ins_addr, struct pt_regs *regs);
unsigned long get_ins_imm_val(unsigned long ins_addr);
#endif /* __PF_H_ */