diff options
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a98a7b27aca1..697291aceea7 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -408,6 +408,10 @@ struct device_domain_info { struct list_head global; /* link to global list */ u8 bus; /* PCI bus number */ u8 devfn; /* PCI devfn number */ + struct { + u8 enabled:1; + u8 qdep; + } ats; /* ATS state */ struct device *dev; /* it's NULL for PCIe-to-PCI bridge */ struct intel_iommu *iommu; /* IOMMU used by this device */ struct dmar_domain *domain; /* pointer to domain */ @@ -1391,19 +1395,26 @@ iommu_support_dev_iotlb (struct dmar_domain *domain, struct intel_iommu *iommu, static void iommu_enable_dev_iotlb(struct device_domain_info *info) { + struct pci_dev *pdev; + if (!info || !dev_is_pci(info->dev)) return; - pci_enable_ats(to_pci_dev(info->dev), VTD_PAGE_SHIFT); + pdev = to_pci_dev(info->dev); + if (pci_enable_ats(pdev, VTD_PAGE_SHIFT)) + return; + + info->ats.enabled = 1; + info->ats.qdep = pci_ats_queue_depth(pdev); } static void iommu_disable_dev_iotlb(struct device_domain_info *info) { - if (!info->dev || !dev_is_pci(info->dev) || - !pci_ats_enabled(to_pci_dev(info->dev))) + if (!info->ats.enabled) return; pci_disable_ats(to_pci_dev(info->dev)); + info->ats.enabled = 0; } static void iommu_flush_dev_iotlb(struct dmar_domain *domain, @@ -1415,16 +1426,11 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain, spin_lock_irqsave(&device_domain_lock, flags); list_for_each_entry(info, &domain->devices, link) { - struct pci_dev *pdev; - if (!info->dev || !dev_is_pci(info->dev)) - continue; - - pdev = to_pci_dev(info->dev); - if (!pci_ats_enabled(pdev)) + if (!info->ats.enabled) continue; sid = info->bus << 8 | info->devfn; - qdep = pci_ats_queue_depth(pdev); + qdep = info->ats.qdep; qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask); } spin_unlock_irqrestore(&device_domain_lock, flags); @@ -1830,8 +1836,9 @@ static int domain_init(struct dmar_domain *domain, int guest_width) static void domain_exit(struct dmar_domain *domain) { + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; struct page *freelist = NULL; - int i; /* Domain 0 is reserved, so dont process it */ if (!domain) @@ -1851,8 +1858,10 @@ static void domain_exit(struct dmar_domain *domain) /* clear attached or cached domains */ rcu_read_lock(); - for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) - iommu_detach_domain(domain, g_iommus[i]); + for_each_active_iommu(iommu, drhd) + if (domain_type_is_vm(domain) || + test_bit(iommu->seq_id, domain->iommu_bmp)) + iommu_detach_domain(domain, iommu); rcu_read_unlock(); dma_free_pagelist(freelist); @@ -2272,6 +2281,8 @@ static struct dmar_domain *dmar_insert_dev_info(struct intel_iommu *iommu, info->bus = bus; info->devfn = devfn; + info->ats.enabled = 0; + info->ats.qdep = 0; info->dev = dev; info->domain = domain; info->iommu = iommu; |