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iommu/vt-d: Remove IOVA domain rcache flushing for CPU offlining 

Now that the core code handles flushing per-IOVA domain CPU rcaches,
remove the handling here.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1616675401-151997-3-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
John Garry 2021-03-25 20:29:59 +08:00 committed by Joerg Roedel
parent f598a497bc
commit 363f266eef
2 changed files with 0 additions and 32 deletions
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31
drivers/iommu/intel/iommu.c
View File

@ -4064,35 +4064,6 @@ static struct notifier_block intel_iommu_memory_nb = {
.priority = 0
};
static void free_all_cpu_cached_iovas(unsigned int cpu)
{
int i;
for (i = 0; i < g_num_of_iommus; i++) {
struct intel_iommu *iommu = g_iommus[i];
struct dmar_domain *domain;
int did;
if (!iommu)
continue;
for (did = 0; did < cap_ndoms(iommu->cap); did++) {
domain = get_iommu_domain(iommu, (u16)did);
if (!domain || domain->domain.type != IOMMU_DOMAIN_DMA)
continue;
iommu_dma_free_cpu_cached_iovas(cpu, &domain->domain);
}
}
}
static int intel_iommu_cpu_dead(unsigned int cpu)
{
free_all_cpu_cached_iovas(cpu);
return 0;
}
static void intel_disable_iommus(void)
{
struct intel_iommu *iommu = NULL;
@ -4387,8 +4358,6 @@ int __init intel_iommu_init(void)
bus_set_iommu(&pci_bus_type, &intel_iommu_ops);
if (si_domain && !hw_pass_through)
register_memory_notifier(&intel_iommu_memory_nb);
cpuhp_setup_state(CPUHP_IOMMU_INTEL_DEAD, "iommu/intel:dead", NULL,
intel_iommu_cpu_dead);
down_read(&dmar_global_lock);
if (probe_acpi_namespace_devices())

1
include/linux/cpuhotplug.h
View File

@ -57,7 +57,6 @@ enum cpuhp_state {
CPUHP_PAGE_ALLOC_DEAD,
CPUHP_NET_DEV_DEAD,
CPUHP_PCI_XGENE_DEAD,
CPUHP_IOMMU_INTEL_DEAD,
CPUHP_IOMMU_IOVA_DEAD,
CPUHP_LUSTRE_CFS_DEAD,
CPUHP_AP_ARM_CACHE_B15_RAC_DEAD,