Commit-ID: 21647615db288d9dacad0de6a5df846b39d51bea
Gitweb: http://git.kernel.org/tip/21647615db288d9dacad0de6a5df846b39d51bea
Author: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
AuthorDate: Sun, 27 Nov 2016 00:13:41 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 2 Dec 2016 00:52:37 +0100
iommu/vt-d: Convert to hotplug state machine
Install the callbacks via the state machine.
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: rt@xxxxxxxxxxxxx
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20161126231350.10321-14-bigeasy@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 24 ++++++------------------
include/linux/cpuhotplug.h | 1 +
2 files changed, 7 insertions(+), 18 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a4407ea..fd79625 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -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;
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index c7d0d76..853f817 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -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,
--
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