| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/device.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) |
| return sprintf(buf, "Mitigation: etokens\n"); |
| if (__is_defined(CC_USING_EXPOLINE) && !nospec_disable) |
| return sprintf(buf, "Mitigation: execute trampolines\n"); |
| if (__test_facility(82, S390_lowcore.alt_stfle_fac_list)) |
| return sprintf(buf, "Mitigation: limited branch prediction\n"); |
| return sprintf(buf, "Vulnerable\n"); |