Michael Cree | 6fd16ce | 2018-02-26 22:02:12 +1300 | [diff] [blame] | 1 | |
| 2 | #include <asm/hwrpb.h> |
| 3 | #include <linux/device.h> |
Al Viro | 6e8d023 | 2024-01-25 09:22:01 -0500 | [diff] [blame] | 4 | #include <linux/cpu.h> |
Michael Cree | 6fd16ce | 2018-02-26 22:02:12 +1300 | [diff] [blame] | 5 | |
| 6 | |
| 7 | #ifdef CONFIG_SYSFS |
| 8 | |
| 9 | static int cpu_is_ev6_or_later(void) |
| 10 | { |
| 11 | struct percpu_struct *cpu; |
| 12 | unsigned long cputype; |
| 13 | |
| 14 | cpu = (struct percpu_struct *)((char *)hwrpb + hwrpb->processor_offset); |
| 15 | cputype = cpu->type & 0xffffffff; |
| 16 | /* Include all of EV6, EV67, EV68, EV7, EV79 and EV69. */ |
| 17 | return (cputype == EV6_CPU) || ((cputype >= EV67_CPU) && (cputype <= EV69_CPU)); |
| 18 | } |
| 19 | |
| 20 | ssize_t cpu_show_meltdown(struct device *dev, |
| 21 | struct device_attribute *attr, char *buf) |
| 22 | { |
| 23 | if (cpu_is_ev6_or_later()) |
| 24 | return sprintf(buf, "Vulnerable\n"); |
| 25 | else |
| 26 | return sprintf(buf, "Not affected\n"); |
| 27 | } |
| 28 | |
| 29 | ssize_t cpu_show_spectre_v1(struct device *dev, |
| 30 | struct device_attribute *attr, char *buf) |
| 31 | { |
| 32 | if (cpu_is_ev6_or_later()) |
| 33 | return sprintf(buf, "Vulnerable\n"); |
| 34 | else |
| 35 | return sprintf(buf, "Not affected\n"); |
| 36 | } |
| 37 | |
| 38 | ssize_t cpu_show_spectre_v2(struct device *dev, |
| 39 | struct device_attribute *attr, char *buf) |
| 40 | { |
| 41 | if (cpu_is_ev6_or_later()) |
| 42 | return sprintf(buf, "Vulnerable\n"); |
| 43 | else |
| 44 | return sprintf(buf, "Not affected\n"); |
| 45 | } |
| 46 | #endif |