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iommu/vt-d: Convert to hotplug state machine 

Install the callbacks via the state machine.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Cc: rt@linutronix.de
Cc: David Woodhouse <dwmw2@infradead.org>
Link: http://lkml.kernel.org/r/20161126231350.10321-14-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hifive-unleashed-5.1
Anna-Maria Gleixner 2016-11-27 00:13:41 +01:00 committed by Thomas Gleixner
parent cab7a7e5b6
commit 21647615db
2 changed files with 7 additions and 18 deletions
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24
drivers/iommu/intel-iommu.c
View File

@ -4665,25 +4665,13 @@ static void free_all_cpu_cached_iovas(unsigned int cpu)
}
}
static int intel_iommu_cpu_notifier(struct notifier_block *nfb,
unsigned long action, void *v)
static int intel_iommu_cpu_dead(unsigned int cpu)
{
unsigned int cpu = (unsigned long)v;
switch (action) {
case CPU_DEAD:
case CPU_DEAD_FROZEN:
free_all_cpu_cached_iovas(cpu);
flush_unmaps_timeout(cpu);
break;
}
return NOTIFY_OK;
free_all_cpu_cached_iovas(cpu);
flush_unmaps_timeout(cpu);
return 0;
}
static struct notifier_block intel_iommu_cpu_nb = {
.notifier_call = intel_iommu_cpu_notifier,
};
static ssize_t intel_iommu_show_version(struct device *dev,
struct device_attribute *attr,
char *buf)
@ -4832,8 +4820,8 @@ int __init intel_iommu_init(void)
bus_register_notifier(&pci_bus_type, &device_nb);
if (si_domain && !hw_pass_through)
register_memory_notifier(&intel_iommu_memory_nb);
register_hotcpu_notifier(&intel_iommu_cpu_nb);
cpuhp_setup_state(CPUHP_IOMMU_INTEL_DEAD, "iommu/intel:dead", NULL,
intel_iommu_cpu_dead);
intel_iommu_enabled = 1;
return 0;

1
include/linux/cpuhotplug.h
View File

@ -40,6 +40,7 @@ enum cpuhp_state {
CPUHP_PAGE_ALLOC_DEAD,
CPUHP_NET_DEV_DEAD,
CPUHP_PCI_XGENE_DEAD,
CPUHP_IOMMU_INTEL_DEAD,
CPUHP_WORKQUEUE_PREP,
CPUHP_POWER_NUMA_PREPARE,
CPUHP_HRTIMERS_PREPARE,