diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 17 | ||||
| -rw-r--r-- | drivers/iommu/intel/dmar.c | 3 | ||||
| -rw-r--r-- | drivers/iommu/intel/iommu.h | 2 | ||||
| -rw-r--r-- | drivers/iommu/intel/irq_remapping.c | 6 | ||||
| -rw-r--r-- | drivers/iommu/intel/perfmon.c | 68 | ||||
| -rw-r--r-- | drivers/iommu/iommufd/pages.c | 16 |
6 files changed, 72 insertions, 40 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 483aaaeb6dae..1abd187c6075 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1415,23 +1415,26 @@ static struct iommu_device *exynos_iommu_probe_device(struct device *dev) return &data->iommu; } -static void exynos_iommu_release_device(struct device *dev) +static void exynos_iommu_set_platform_dma(struct device *dev) { struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); - struct sysmmu_drvdata *data; if (owner->domain) { struct iommu_group *group = iommu_group_get(dev); if (group) { -#ifndef CONFIG_ARM - WARN_ON(owner->domain != - iommu_group_default_domain(group)); -#endif exynos_iommu_detach_device(owner->domain, dev); iommu_group_put(group); } } +} + +static void exynos_iommu_release_device(struct device *dev) +{ + struct exynos_iommu_owner *owner = dev_iommu_priv_get(dev); + struct sysmmu_drvdata *data; + + exynos_iommu_set_platform_dma(dev); list_for_each_entry(data, &owner->controllers, owner_node) device_link_del(data->link); @@ -1479,7 +1482,7 @@ static const struct iommu_ops exynos_iommu_ops = { .domain_alloc = exynos_iommu_domain_alloc, .device_group = generic_device_group, #ifdef CONFIG_ARM - .set_platform_dma_ops = exynos_iommu_release_device, + .set_platform_dma_ops = exynos_iommu_set_platform_dma, #endif .probe_device = exynos_iommu_probe_device, .release_device = exynos_iommu_release_device, diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index 6acfe879589c..23828d189c2a 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -1071,7 +1071,8 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd) } err = -EINVAL; - if (cap_sagaw(iommu->cap) == 0) { + if (!cap_sagaw(iommu->cap) && + (!ecap_smts(iommu->ecap) || ecap_slts(iommu->ecap))) { pr_info("%s: No supported address widths. Not attempting DMA translation.\n", iommu->name); drhd->ignored = 1; diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index d6df3b865812..694ab9b7d3e9 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -641,6 +641,8 @@ struct iommu_pmu { DECLARE_BITMAP(used_mask, IOMMU_PMU_IDX_MAX); struct perf_event *event_list[IOMMU_PMU_IDX_MAX]; unsigned char irq_name[16]; + struct hlist_node cpuhp_node; + int cpu; }; #define IOMMU_IRQ_ID_OFFSET_PRQ (DMAR_UNITS_SUPPORTED) diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c index 6d01fa078c36..df9e261af0b5 100644 --- a/drivers/iommu/intel/irq_remapping.c +++ b/drivers/iommu/intel/irq_remapping.c @@ -311,14 +311,12 @@ static int set_ioapic_sid(struct irte *irte, int apic) if (!irte) return -1; - down_read(&dmar_global_lock); for (i = 0; i < MAX_IO_APICS; i++) { if (ir_ioapic[i].iommu && ir_ioapic[i].id == apic) { sid = (ir_ioapic[i].bus << 8) | ir_ioapic[i].devfn; break; } } - up_read(&dmar_global_lock); if (sid == 0) { pr_warn("Failed to set source-id of IOAPIC (%d)\n", apic); @@ -338,14 +336,12 @@ static int set_hpet_sid(struct irte *irte, u8 id) if (!irte) return -1; - down_read(&dmar_global_lock); for (i = 0; i < MAX_HPET_TBS; i++) { if (ir_hpet[i].iommu && ir_hpet[i].id == id) { sid = (ir_hpet[i].bus << 8) | ir_hpet[i].devfn; break; } } - up_read(&dmar_global_lock); if (sid == 0) { pr_warn("Failed to set source-id of HPET block (%d)\n", id); @@ -1339,9 +1335,7 @@ static int intel_irq_remapping_alloc(struct irq_domain *domain, if (!data) goto out_free_parent; - down_read(&dmar_global_lock); index = alloc_irte(iommu, &data->irq_2_iommu, nr_irqs); - up_read(&dmar_global_lock); if (index < 0) { pr_warn("Failed to allocate IRTE\n"); kfree(data); diff --git a/drivers/iommu/intel/perfmon.c b/drivers/iommu/intel/perfmon.c index e17d9743a0d8..cf43e798eca4 100644 --- a/drivers/iommu/intel/perfmon.c +++ b/drivers/iommu/intel/perfmon.c @@ -773,19 +773,34 @@ static void iommu_pmu_unset_interrupt(struct intel_iommu *iommu) iommu->perf_irq = 0; } -static int iommu_pmu_cpu_online(unsigned int cpu) +static int iommu_pmu_cpu_online(unsigned int cpu, struct hlist_node *node) { + struct iommu_pmu *iommu_pmu = hlist_entry_safe(node, typeof(*iommu_pmu), cpuhp_node); + if (cpumask_empty(&iommu_pmu_cpu_mask)) cpumask_set_cpu(cpu, &iommu_pmu_cpu_mask); + if (cpumask_test_cpu(cpu, &iommu_pmu_cpu_mask)) + iommu_pmu->cpu = cpu; + return 0; } -static int iommu_pmu_cpu_offline(unsigned int cpu) +static int iommu_pmu_cpu_offline(unsigned int cpu, struct hlist_node *node) { - struct dmar_drhd_unit *drhd; - struct intel_iommu *iommu; - int target; + struct iommu_pmu *iommu_pmu = hlist_entry_safe(node, typeof(*iommu_pmu), cpuhp_node); + int target = cpumask_first(&iommu_pmu_cpu_mask); + + /* + * The iommu_pmu_cpu_mask has been updated when offline the CPU + * for the first iommu_pmu. Migrate the other iommu_pmu to the + * new target. + */ + if (target < nr_cpu_ids && target != iommu_pmu->cpu) { + perf_pmu_migrate_context(&iommu_pmu->pmu, cpu, target); + iommu_pmu->cpu = target; + return 0; + } if (!cpumask_test_and_clear_cpu(cpu, &iommu_pmu_cpu_mask)) return 0; @@ -795,45 +810,50 @@ static int iommu_pmu_cpu_offline(unsigned int cpu) if (target < nr_cpu_ids) cpumask_set_cpu(target, &iommu_pmu_cpu_mask); else - target = -1; + return 0; - rcu_read_lock(); - - for_each_iommu(iommu, drhd) { - if (!iommu->pmu) - continue; - perf_pmu_migrate_context(&iommu->pmu->pmu, cpu, target); - } - rcu_read_unlock(); + perf_pmu_migrate_context(&iommu_pmu->pmu, cpu, target); + iommu_pmu->cpu = target; return 0; } static int nr_iommu_pmu; +static enum cpuhp_state iommu_cpuhp_slot; static int iommu_pmu_cpuhp_setup(struct iommu_pmu *iommu_pmu) { int ret; - if (nr_iommu_pmu++) - return 0; + if (!nr_iommu_pmu) { + ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, + "driver/iommu/intel/perfmon:online", + iommu_pmu_cpu_online, + iommu_pmu_cpu_offline); + if (ret < 0) + return ret; + iommu_cpuhp_slot = ret; + } - ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_IOMMU_PERF_ONLINE, - "driver/iommu/intel/perfmon:online", - iommu_pmu_cpu_online, - iommu_pmu_cpu_offline); - if (ret) - nr_iommu_pmu = 0; + ret = cpuhp_state_add_instance(iommu_cpuhp_slot, &iommu_pmu->cpuhp_node); + if (ret) { + if (!nr_iommu_pmu) + cpuhp_remove_multi_state(iommu_cpuhp_slot); + return ret; + } + nr_iommu_pmu++; - return ret; + return 0; } static void iommu_pmu_cpuhp_free(struct iommu_pmu *iommu_pmu) { + cpuhp_state_remove_instance(iommu_cpuhp_slot, &iommu_pmu->cpuhp_node); + if (--nr_iommu_pmu) return; - cpuhp_remove_state(CPUHP_AP_PERF_X86_IOMMU_PERF_ONLINE); + cpuhp_remove_multi_state(iommu_cpuhp_slot); } void iommu_pmu_register(struct intel_iommu *iommu) diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index f8d92c9bb65b..3c47846cc5ef 100644 --- a/drivers/iommu/iommufd/pages.c +++ b/drivers/iommu/iommufd/pages.c @@ -294,9 +294,9 @@ static void batch_clear_carry(struct pfn_batch *batch, unsigned int keep_pfns) batch->npfns[batch->end - 1] < keep_pfns); batch->total_pfns = keep_pfns; - batch->npfns[0] = keep_pfns; batch->pfns[0] = batch->pfns[batch->end - 1] + (batch->npfns[batch->end - 1] - keep_pfns); + batch->npfns[0] = keep_pfns; batch->end = 0; } @@ -1142,6 +1142,7 @@ struct iopt_pages *iopt_alloc_pages(void __user *uptr, unsigned long length, bool writable) { struct iopt_pages *pages; + unsigned long end; /* * The iommu API uses size_t as the length, and protect the DIV_ROUND_UP @@ -1150,6 +1151,9 @@ struct iopt_pages *iopt_alloc_pages(void __user *uptr, unsigned long length, if (length > SIZE_MAX - PAGE_SIZE || length == 0) return ERR_PTR(-EINVAL); + if (check_add_overflow((unsigned long)uptr, length, &end)) + return ERR_PTR(-EOVERFLOW); + pages = kzalloc(sizeof(*pages), GFP_KERNEL_ACCOUNT); if (!pages) return ERR_PTR(-ENOMEM); @@ -1203,13 +1207,21 @@ iopt_area_unpin_domain(struct pfn_batch *batch, struct iopt_area *area, unsigned long start = max(start_index, *unmapped_end_index); + if (IS_ENABLED(CONFIG_IOMMUFD_TEST) && + batch->total_pfns) + WARN_ON(*unmapped_end_index - + batch->total_pfns != + start_index); batch_from_domain(batch, domain, area, start, last_index); - batch_last_index = start + batch->total_pfns - 1; + batch_last_index = start_index + batch->total_pfns - 1; } else { batch_last_index = last_index; } + if (IS_ENABLED(CONFIG_IOMMUFD_TEST)) + WARN_ON(batch_last_index > real_last_index); + /* * unmaps must always 'cut' at a place where the pfns are not * contiguous to pair with the maps that always install |