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23 lines
766 B
23 lines
766 B
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/device.h> |
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#include <linux/cpu.h> |
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#include <asm/facility.h> |
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#include <asm/nospec-branch.h> |
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ssize_t cpu_show_spectre_v1(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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return sprintf(buf, "Mitigation: __user pointer sanitization\n"); |
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} |
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ssize_t cpu_show_spectre_v2(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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if (test_facility(156)) |
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return sprintf(buf, "Mitigation: etokens\n"); |
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if (__is_defined(CC_USING_EXPOLINE) && !nospec_disable) |
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return sprintf(buf, "Mitigation: execute trampolines\n"); |
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if (__test_facility(82, S390_lowcore.alt_stfle_fac_list)) |
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return sprintf(buf, "Mitigation: limited branch prediction\n"); |
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return sprintf(buf, "Vulnerable\n"); |
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}
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