mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
33 lines
1.0 KiB
C
33 lines
1.0 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
/*
|
||
|
* Handle detection, reporting and mitigation of Spectre v1, v2 and v4, as
|
||
|
* detailed at:
|
||
|
*
|
||
|
* https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
|
||
|
*
|
||
|
* This code was originally written hastily under an awful lot of stress and so
|
||
|
* aspects of it are somewhat hacky. Unfortunately, changing anything in here
|
||
|
* instantly makes me feel ill. Thanks, Jann. Thann.
|
||
|
*
|
||
|
* Copyright (C) 2018 ARM Ltd, All Rights Reserved.
|
||
|
* Copyright (C) 2020 Google LLC
|
||
|
*
|
||
|
* "If there's something strange in your neighbourhood, who you gonna call?"
|
||
|
*
|
||
|
* Authors: Will Deacon <will@kernel.org> and Marc Zyngier <maz@kernel.org>
|
||
|
*/
|
||
|
|
||
|
#include <linux/device.h>
|
||
|
|
||
|
/*
|
||
|
* Spectre v1.
|
||
|
*
|
||
|
* The kernel can't protect userspace for this one: it's each person for
|
||
|
* themselves. Advertise what we're doing and be done with it.
|
||
|
*/
|
||
|
ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr,
|
||
|
char *buf)
|
||
|
{
|
||
|
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
|
||
|
}
|