Commit 363f266e authored by John Garry's avatar John Garry Committed by Joerg Roedel
Browse files

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: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1616675401-151997-3-git-send-email-john.garry@huawei.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent f598a497

drivers/iommu/intel/iommu.c

+0 −31
Original line number Diff line number Diff line
@@ -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())

include/linux/cpuhotplug.h

+0 −1
Original line number Diff line number Diff line
@@ -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,