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- #include <asm/hwrpb.h>
- #include <linux/device.h>
- #ifdef CONFIG_SYSFS
- static int cpu_is_ev6_or_later(void)
- {
- struct percpu_struct *cpu;
- unsigned long cputype;
- cpu = (struct percpu_struct *)((char *)hwrpb + hwrpb->processor_offset);
- cputype = cpu->type & 0xffffffff;
- /* Include all of EV6, EV67, EV68, EV7, EV79 and EV69. */
- return (cputype == EV6_CPU) || ((cputype >= EV67_CPU) && (cputype <= EV69_CPU));
- }
- ssize_t cpu_show_meltdown(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- if (cpu_is_ev6_or_later())
- return sprintf(buf, "Vulnerable\n");
- else
- return sprintf(buf, "Not affected\n");
- }
- ssize_t cpu_show_spectre_v1(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- if (cpu_is_ev6_or_later())
- return sprintf(buf, "Vulnerable\n");
- else
- return sprintf(buf, "Not affected\n");
- }
- ssize_t cpu_show_spectre_v2(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- if (cpu_is_ev6_or_later())
- return sprintf(buf, "Vulnerable\n");
- else
- return sprintf(buf, "Not affected\n");
- }
- #endif
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