From: John Garry <john.garry@huawei.com>
To: <joro@8bytes.org>, <will@kernel.org>, <dwmw2@infradead.org>,
<baolu.lu@linux.intel.com>, <robin.murphy@arm.com>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
linuxarm@huawei.com
Subject: [PATCH v2 2/4] iommu/vt-d: Remove IOVA domain rcache flushing for CPU offlining
Date: Thu, 25 Mar 2021 20:29:59 +0800 [thread overview]
Message-ID: <1616675401-151997-3-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1616675401-151997-1-git-send-email-john.garry@huawei.com>
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>
---
drivers/iommu/intel/iommu.c | 31 -------------------------------
include/linux/cpuhotplug.h | 1 -
2 files changed, 32 deletions(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index ee0932307d64..d1e66e1b07b8 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4065,35 +4065,6 @@ 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;
@@ -4388,8 +4359,6 @@ 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())
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index cedac9986557..85996494bec1 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -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,
--
2.26.2
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next prev parent reply other threads:[~2021-03-25 12:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 12:29 [PATCH v2 0/4] iommu/iova: Add CPU hotplug handler to flush rcaches to core code John Garry
2021-03-25 12:29 ` [PATCH v2 1/4] iova: Add CPU hotplug handler to flush rcaches John Garry
2021-03-25 12:29 ` John Garry [this message]
2021-03-25 12:30 ` [PATCH v2 3/4] iommu: Delete iommu_dma_free_cpu_cached_iovas() John Garry
2021-03-25 12:52 ` Robin Murphy
2021-03-25 12:30 ` [PATCH v2 4/4] iommu: Stop exporting free_iova_fast() John Garry
2021-03-25 12:53 ` Robin Murphy
2021-03-25 17:53 ` [PATCH v2 0/4] iommu/iova: Add CPU hotplug handler to flush rcaches to core code Will Deacon
2021-04-06 8:29 ` John Garry
2021-04-07 8:31 ` Joerg Roedel
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