diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index 08286269fd24..b9bc8a1a584e 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -509,12 +509,20 @@ static struct platform_device *microcode_pdev; static int check_online_cpus(void) { - if (num_online_cpus() == num_present_cpus()) - return 0; + unsigned int cpu; - pr_err("Not all CPUs online, aborting microcode update.\n"); + /* + * Make sure all CPUs are online. It's fine for SMT to be disabled if + * all the primary threads are still online. + */ + for_each_present_cpu(cpu) { + if (topology_is_primary_thread(cpu) && !cpu_online(cpu)) { + pr_err("Not all CPUs online, aborting microcode update.\n"); + return -EINVAL; + } + } - return -EINVAL; + return 0; } static atomic_t late_cpus_in; |