1 // SPDX-License-Identifier: GPL-2.0 !! 1
2 #include <linux/init.h> !! 2 #include <asm/hwrpb.h>
>> 3 #include <linux/device.h>
3 #include <linux/cpu.h> 4 #include <linux/cpu.h>
4 #include <asm/bugs.h> <<
5 #include <asm/proc-fns.h> <<
6 5
7 void check_other_bugs(void) !! 6
>> 7 #ifdef CONFIG_SYSFS
>> 8
>> 9 static int cpu_is_ev6_or_later(void)
8 { 10 {
9 #ifdef MULTI_CPU !! 11 struct percpu_struct *cpu;
10 if (cpu_check_bugs) !! 12 unsigned long cputype;
11 cpu_check_bugs(); !! 13
12 #endif !! 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");
13 } 36 }
14 37
15 void __init arch_cpu_finalize_init(void) !! 38 ssize_t cpu_show_spectre_v2(struct device *dev,
>> 39 struct device_attribute *attr, char *buf)
16 { 40 {
17 check_writebuffer_bugs(); !! 41 if (cpu_is_ev6_or_later())
18 check_other_bugs(); !! 42 return sprintf(buf, "Vulnerable\n");
>> 43 else
>> 44 return sprintf(buf, "Not affected\n");
19 } 45 }
>> 46 #endif
20 47
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