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-rw-r--r--arch/alpha/kernel/bugs.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/alpha/kernel/bugs.c b/arch/alpha/kernel/bugs.c
new file mode 100644
index 0000000000..08cc10d7fa
--- /dev/null
+++ b/arch/alpha/kernel/bugs.c
@@ -0,0 +1,45 @@
+
+#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