diff options
Diffstat (limited to 'arch/x86/kernel/cpu/microcode/core.c')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index f75c140906d0..ccc83b0bf63c 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -136,7 +136,7 @@ bool __init microcode_loader_disabled(void) return dis_ucode_ldr; } -static void early_parse_cmdline(void) +static void __init early_parse_cmdline(void) { char cmd_buf[64] = {}; char *s, *p = cmd_buf; @@ -589,6 +589,17 @@ static int load_late_stop_cpus(bool is_safe) pr_err("You should switch to early loading, if possible.\n"); } + /* + * Pre-load the microcode image into a staging device. This + * process is preemptible and does not require stopping CPUs. + * Successful staging simplifies the subsequent late-loading + * process, reducing rendezvous time. + * + * Even if the transfer fails, the update will proceed as usual. + */ + if (microcode_ops->use_staging) + microcode_ops->stage_microcode(); + atomic_set(&late_cpus_in, num_online_cpus()); atomic_set(&offline_in_nmi, 0); loops_per_usec = loops_per_jiffy / (TICK_NSEC / 1000); |