From: tip-bot for Sebastian Andrzej Siewior <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: peterz@infradead.org, linux-kernel@vger.kernel.org, bp@alien8.de,
bigeasy@linutronix.de, hpa@zytor.com, mingo@kernel.org,
tglx@linutronix.de
Subject: [tip:smp/hotplug] x86/microcode: Convert to hotplug state machine
Date: Mon, 19 Sep 2016 12:54:13 -0700 [thread overview]
Message-ID: <tip-29bd7fbc071598e939526f782293dbe137be3768@git.kernel.org> (raw)
In-Reply-To: <20160907164523.46a2xnffha4bv63g@linutronix.de>
Commit-ID: 29bd7fbc071598e939526f782293dbe137be3768
Gitweb: http://git.kernel.org/tip/29bd7fbc071598e939526f782293dbe137be3768
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
AuthorDate: Wed, 7 Sep 2016 18:45:23 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 19 Sep 2016 21:44:27 +0200
x86/microcode: Convert to hotplug state machine
Install the callbacks via the state machine.
CPU_UP_CANCELED_FROZEN() is not preserved: It is only there to free memory in an
error case because it is assumed if the CPU does show up on resume it won't be
seen ever again. As per Borislav:
|IOW, you don't need mc_cpu_dead().
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160907164523.46a2xnffha4bv63g@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/cpu/microcode/core.c | 52 ++++++++++++------------------------
1 file changed, 17 insertions(+), 35 deletions(-)
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index df04b2d..5ce5155 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -558,55 +558,36 @@ static struct syscore_ops mc_syscore_ops = {
.resume = mc_bp_resume,
};
-static int
-mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
+static int mc_cpu_online(unsigned int cpu)
{
- unsigned int cpu = (unsigned long)hcpu;
struct device *dev;
dev = get_cpu_device(cpu);
+ microcode_update_cpu(cpu);
+ pr_debug("CPU%d added\n", cpu);
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- microcode_update_cpu(cpu);
- pr_debug("CPU%d added\n", cpu);
- /*
- * "break" is missing on purpose here because we want to fall
- * through in order to create the sysfs group.
- */
-
- case CPU_DOWN_FAILED:
- if (sysfs_create_group(&dev->kobj, &mc_attr_group))
- pr_err("Failed to create group for CPU%d\n", cpu);
- break;
+ if (sysfs_create_group(&dev->kobj, &mc_attr_group))
+ pr_err("Failed to create group for CPU%d\n", cpu);
+ return 0;
+}
- case CPU_DOWN_PREPARE:
- /* Suspend is in progress, only remove the interface */
- sysfs_remove_group(&dev->kobj, &mc_attr_group);
- pr_debug("CPU%d removed\n", cpu);
- break;
+static int mc_cpu_down_prep(unsigned int cpu)
+{
+ struct device *dev;
+ dev = get_cpu_device(cpu);
+ /* Suspend is in progress, only remove the interface */
+ sysfs_remove_group(&dev->kobj, &mc_attr_group);
+ pr_debug("CPU%d removed\n", cpu);
/*
- * case CPU_DEAD:
- *
* When a CPU goes offline, don't free up or invalidate the copy of
* the microcode in kernel memory, so that we can reuse it when the
* CPU comes back online without unnecessarily requesting the userspace
* for it again.
*/
- }
-
- /* The CPU refused to come up during a system resume */
- if (action == CPU_UP_CANCELED_FROZEN)
- microcode_fini_cpu(cpu);
-
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block mc_cpu_notifier = {
- .notifier_call = mc_cpu_callback,
-};
-
static struct attribute *cpu_root_microcode_attrs[] = {
&dev_attr_reload.attr,
NULL
@@ -665,7 +646,8 @@ int __init microcode_init(void)
goto out_ucode_group;
register_syscore_ops(&mc_syscore_ops);
- register_hotcpu_notifier(&mc_cpu_notifier);
+ cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/microcode:online",
+ mc_cpu_online, mc_cpu_down_prep);
pr_info("Microcode Update Driver: v" MICROCODE_VERSION
" <tigran@aivazian.fsnet.co.uk>, Peter Oruba\n");
next prev parent reply other threads:[~2016-09-19 19:55 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-06 17:04 cpu hotplug: convert more drivers (batch #3) Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 01/21] arm64: FP/SIMD: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-09-06 18:14 ` Will Deacon
2016-09-19 19:51 ` [tip:smp/hotplug] arm64/FP/SIMD: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 02/21] ARM: shmobile: " Sebastian Andrzej Siewior
2016-09-06 18:05 ` Geert Uytterhoeven
2016-09-07 13:58 ` Sebastian Andrzej Siewior
2016-09-19 19:52 ` [tip:smp/hotplug] ARM/shmobile: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 03/21] ARM: OMAP: wakeupgen: " Sebastian Andrzej Siewior
2016-09-13 22:24 ` Tony Lindgren
2016-09-19 19:52 ` [tip:smp/hotplug] ARM/OMAP/wakeupgen: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 04/21] ia64: mca: " Sebastian Andrzej Siewior
2016-09-19 19:53 ` [tip:smp/hotplug] ia64/mca: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 05/21] sh: SH-X3 SMP: " Sebastian Andrzej Siewior
2016-09-19 19:53 ` [tip:smp/hotplug] sh/SH-X3 " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 06/21] x86: microcode: " Sebastian Andrzej Siewior
2016-09-07 11:36 ` Borislav Petkov
2016-09-07 14:51 ` Sebastian Andrzej Siewior
2016-09-07 16:02 ` Borislav Petkov
2016-09-07 16:45 ` [PATCH 06/21 v2] " Sebastian Andrzej Siewior
2016-09-19 19:54 ` tip-bot for Sebastian Andrzej Siewior [this message]
2016-09-06 17:04 ` [PATCH 07/21] lib: irq_poll: " Sebastian Andrzej Siewior
2016-09-19 19:54 ` [tip:smp/hotplug] lib/irq_poll: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 08/21] block: softirq: " Sebastian Andrzej Siewior
2016-09-19 19:55 ` [tip:smp/hotplug] block/softirq: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 09/21] oprofile: timer: " Sebastian Andrzej Siewior
2016-09-19 19:55 ` [tip:smp/hotplug] oprofile/timer: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 10/21] virtio scsi: " Sebastian Andrzej Siewior
2016-09-19 19:56 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 11/21] ACPI: processor: " Sebastian Andrzej Siewior
2016-09-06 21:08 ` Rafael J. Wysocki
2016-09-07 14:01 ` Sebastian Andrzej Siewior
2016-09-07 15:59 ` Rafael J. Wysocki
2016-09-19 19:56 ` [tip:smp/hotplug] ACPI/processor: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 12/21] cpufreq: " Sebastian Andrzej Siewior
2016-09-06 21:27 ` Rafael J. Wysocki
2016-09-07 14:18 ` Sebastian Andrzej Siewior
2016-09-07 15:58 ` Rafael J. Wysocki
2016-09-19 19:56 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-09-20 14:56 ` [PATCH] cpufreq: fix up conversion " Sebastian Andrzej Siewior
2016-09-20 15:07 ` [tip:smp/hotplug] cpufreq: Fix " tip-bot for Sebastian Andrzej Siewior
2016-09-20 16:08 ` Borislav Petkov
2016-09-20 16:17 ` [PATCH] cpufreq: fix " Rafael J. Wysocki
2016-09-06 17:04 ` [PATCH 13/21] padata: Convert " Sebastian Andrzej Siewior
2016-09-19 19:57 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 14/21] fault-injection: cpu: " Sebastian Andrzej Siewior
2016-09-19 19:57 ` [tip:smp/hotplug] fault-injection/cpu: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 15/21] mips: octeon: smp: " Sebastian Andrzej Siewior
2016-09-07 8:24 ` Matt Redfearn
2016-09-07 14:27 ` Sebastian Andrzej Siewior
2016-09-08 8:34 ` Matt Redfearn
2016-09-19 15:10 ` Ralf Baechle
2016-09-19 19:58 ` [tip:smp/hotplug] mips/octeon/smp: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 16/21] mips: loongson: smp: " Sebastian Andrzej Siewior
2016-09-19 15:10 ` Ralf Baechle
2016-09-19 19:58 ` [tip:smp/hotplug] mips/loongson/smp: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 17/21] s390: mm: pfault: " Sebastian Andrzej Siewior
2016-09-19 19:59 ` [tip:smp/hotplug] s390/mm/pfault: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 18/21] x86: apic: uv: " Sebastian Andrzej Siewior
2016-09-19 19:59 ` [tip:smp/hotplug] x86/apic/uv: " tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 19/21] blk: mq: reserve hotplug ID states for block Sebastian Andrzej Siewior
2016-09-19 20:03 ` [tip:smp/hotplug] blk/mq: Reserve hotplug ID states for block multiqueue tip-bot for Sebastian Andrzej Siewior
2016-09-19 21:24 ` [tip:smp/hotplug] blk/mq: Reserve hotplug " tip-bot for Sebastian Andrzej Siewior
2016-09-21 7:45 ` tip-bot for Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 20/21] blk: mq: cpu-notif: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-09-06 17:04 ` [PATCH 21/21] blk: mq: " Sebastian Andrzej Siewior
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