diff options
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 0778249cd49d..e84c0873559e 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -1971,6 +1971,9 @@ static ssize_t write_cpuhp_fail(struct device *dev, if (ret) return ret; + if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE) + return -EINVAL; + /* * Cannot fail STARTING/DYING callbacks. */ @@ -2068,7 +2071,7 @@ static void cpuhp_online_cpu_device(unsigned int cpu) kobject_uevent(&dev->kobj, KOBJ_ONLINE); } -static int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) +int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { int cpu, ret = 0; @@ -2100,7 +2103,7 @@ static int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) return ret; } -static int cpuhp_smt_enable(void) +int cpuhp_smt_enable(void) { int cpu, ret = 0; @@ -2346,6 +2349,9 @@ static int __init mitigations_parse_cmdline(char *arg) cpu_mitigations = CPU_MITIGATIONS_AUTO; else if (!strcmp(arg, "auto,nosmt")) cpu_mitigations = CPU_MITIGATIONS_AUTO_NOSMT; + else + pr_crit("Unsupported mitigations=%s, system may still be vulnerable\n", + arg); return 0; } |