mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-10-31 16:54:21 +00:00
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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#include <asm/hwrpb.h>
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#include <linux/device.h>
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#ifdef CONFIG_SYSFS
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static int cpu_is_ev6_or_later(void)
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{
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struct percpu_struct *cpu;
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unsigned long cputype;
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cpu = (struct percpu_struct *)((char *)hwrpb + hwrpb->processor_offset);
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cputype = cpu->type & 0xffffffff;
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/* Include all of EV6, EV67, EV68, EV7, EV79 and EV69. */
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return (cputype == EV6_CPU) || ((cputype >= EV67_CPU) && (cputype <= EV69_CPU));
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}
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ssize_t cpu_show_meltdown(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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if (cpu_is_ev6_or_later())
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return sprintf(buf, "Vulnerable\n");
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else
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return sprintf(buf, "Not affected\n");
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}
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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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if (cpu_is_ev6_or_later())
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return sprintf(buf, "Vulnerable\n");
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else
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return sprintf(buf, "Not affected\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 (cpu_is_ev6_or_later())
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return sprintf(buf, "Vulnerable\n");
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else
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return sprintf(buf, "Not affected\n");
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}
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#endif
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