14253b0e0SMartin Schwidefsky // SPDX-License-Identifier: GPL-2.0 24253b0e0SMartin Schwidefsky #include <linux/device.h> 34253b0e0SMartin Schwidefsky #include <linux/cpu.h> 44253b0e0SMartin Schwidefsky #include <asm/facility.h> 54253b0e0SMartin Schwidefsky #include <asm/nospec-branch.h> 64253b0e0SMartin Schwidefsky 74253b0e0SMartin Schwidefsky ssize_t cpu_show_spectre_v1(struct device *dev, 84253b0e0SMartin Schwidefsky struct device_attribute *attr, char *buf) 94253b0e0SMartin Schwidefsky { 104253b0e0SMartin Schwidefsky return sprintf(buf, "Mitigation: __user pointer sanitization\n"); 114253b0e0SMartin Schwidefsky } 124253b0e0SMartin Schwidefsky 134253b0e0SMartin Schwidefsky ssize_t cpu_show_spectre_v2(struct device *dev, 144253b0e0SMartin Schwidefsky struct device_attribute *attr, char *buf) 154253b0e0SMartin Schwidefsky { 16aeaf7002SMartin Schwidefsky if (test_facility(156)) 17aeaf7002SMartin Schwidefsky return sprintf(buf, "Mitigation: etokens\n"); 18475c8e9eSJoe Perches if (__is_defined(CC_USING_EXPOLINE) && !nospec_disable) 194253b0e0SMartin Schwidefsky return sprintf(buf, "Mitigation: execute trampolines\n"); 20*17e89e13SSven Schnelle if (__test_facility(82, alt_stfle_fac_list)) 214253b0e0SMartin Schwidefsky return sprintf(buf, "Mitigation: limited branch prediction\n"); 224253b0e0SMartin Schwidefsky return sprintf(buf, "Vulnerable\n"); 234253b0e0SMartin Schwidefsky } 24