bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

x86/microcode/amd: Use cached microcode for AP load

Browse Source 
Now that the microcode cache is initialized before the APs are brought
up, there is no point in scanning builtin/initrd microcode during AP
loading.

Convert the AP loader to utilize the cache, which in turn makes the CPU
hotplug callback which applies the microcode after initrd/builtin is
gone, obsolete as the early loading during late hotplug operations
including the resume path depends now only on the cache.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231017211723.243426023@linutronix.de
This commit is contained in:
Thomas Gleixner
2023-10-17 23:23:55 +02:00
committed by Borislav Petkov (AMD)
parent a7939f0167
commit 5af05b8d51
3 changed files with 13 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/x86/kernel/cpu/microcode/core.c
View File

@@ -154,7 +154,7 @@ void __init load_ucode_bsp(void)
if (intel)
load_ucode_intel_bsp();
else
load_ucode_amd_early(cpuid_1_eax);
load_ucode_amd_bsp(cpuid_1_eax);
}
void load_ucode_ap(void)
@@ -173,7 +173,7 @@ void load_ucode_ap(void)
break;
case X86_VENDOR_AMD:
if (x86_family(cpuid_1_eax) >= 0x10)
load_ucode_amd_early(cpuid_1_eax);
load_ucode_amd_ap(cpuid_1_eax);
break;
default:
break;
@@ -494,15 +494,6 @@ static struct syscore_ops mc_syscore_ops = {
.resume = microcode_bsp_resume,
};
static int mc_cpu_starting(unsigned int cpu)
{
enum ucode_state err = microcode_ops->apply_microcode(cpu);
pr_debug("%s: CPU%d, err: %d\n", __func__, cpu, err);
return err == UCODE_ERROR;
}
static int mc_cpu_online(unsigned int cpu)
{
struct device *dev = get_cpu_device(cpu);
@@ -590,8 +581,6 @@ static int __init microcode_init(void)
schedule_on_each_cpu(setup_online_cpu);
register_syscore_ops(&mc_syscore_ops);
cpuhp_setup_state_nocalls(CPUHP_AP_MICROCODE_LOADER, "x86/microcode:starting",
mc_cpu_starting, NULL);
cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/microcode:online",
mc_cpu_online, mc_cpu_down_prep);