24 lines
727 B
C
24 lines
727 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/device.h>
|
|
#include <linux/cpu.h>
|
|
#include <asm/facility.h>
|
|
#include <asm/nospec-branch.h>
|
|
|
|
ssize_t cpu_show_spectre_v1(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "Mitigation: __user pointer sanitization\n");
|
|
}
|
|
|
|
ssize_t cpu_show_spectre_v2(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
if (test_facility(156))
|
|
return sprintf(buf, "Mitigation: etokens\n");
|
|
if (nospec_uses_trampoline())
|
|
return sprintf(buf, "Mitigation: execute trampolines\n");
|
|
if (__test_facility(82, alt_stfle_fac_list))
|
|
return sprintf(buf, "Mitigation: limited branch prediction\n");
|
|
return sprintf(buf, "Vulnerable\n");
|
|
}
|