diff options
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 50d639a2df88..e1679a6fe468 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -385,14 +385,14 @@ struct dmar_rmrr_unit { struct acpi_dmar_header *hdr; /* ACPI header */ u64 base_address; /* reserved base address*/ u64 end_address; /* reserved end address */ - struct pci_dev **devices; /* target devices */ + struct pci_dev __rcu **devices; /* target devices */ int devices_cnt; /* target device count */ }; struct dmar_atsr_unit { struct list_head list; /* list of ATSR units */ struct acpi_dmar_header *hdr; /* ACPI header */ - struct pci_dev **devices; /* target devices */ + struct pci_dev __rcu **devices; /* target devices */ int devices_cnt; /* target device count */ u8 include_all:1; /* include all ports */ }; @@ -634,12 +634,15 @@ static void domain_update_iommu_superpage(struct dmar_domain *domain) } /* set iommu_superpage to the smallest common denominator */ + rcu_read_lock(); for_each_active_iommu(iommu, drhd) { mask &= cap_super_page_val(iommu->cap); if (!mask) { break; } } + rcu_read_unlock(); + domain->iommu_superpage = fls(mask); } @@ -658,6 +661,7 @@ static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) struct pci_dev *dev; int i; + rcu_read_lock(); for_each_active_iommu(iommu, drhd) { if (segment != drhd->segment) continue; @@ -677,6 +681,7 @@ static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) } iommu = NULL; out: + rcu_read_unlock(); return iommu; } @@ -1535,10 +1540,12 @@ static void domain_exit(struct dmar_domain *domain) dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); /* clear attached or cached domains */ + rcu_read_lock(); for_each_active_iommu(iommu, drhd) if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || test_bit(iommu->seq_id, domain->iommu_bmp)) iommu_detach_domain(domain, iommu); + rcu_read_unlock(); free_domain_mem(domain); } @@ -2338,6 +2345,7 @@ static bool device_has_rmrr(struct pci_dev *dev) struct pci_dev *tmp; int i; + rcu_read_lock(); for_each_rmrr_units(rmrr) { /* * Return TRUE if this RMRR contains the device that @@ -2346,9 +2354,11 @@ static bool device_has_rmrr(struct pci_dev *dev) for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, i, tmp) if (tmp == dev) { + rcu_read_unlock(); return true; } } + rcu_read_unlock(); return false; } @@ -3512,7 +3522,7 @@ int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) atsru->hdr = hdr; atsru->include_all = atsr->flags & 0x1; - list_add(&atsru->list, &dmar_atsr_units); + list_add_rcu(&atsru->list, &dmar_atsr_units); return 0; } @@ -3574,6 +3584,7 @@ int dmar_find_matched_atsr_unit(struct pci_dev *dev) if (!bridge) return 0; + rcu_read_lock(); list_for_each_entry_rcu(atsru, &dmar_atsr_units, list) { atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); if (atsr->segment != pci_domain_nr(dev->bus)) @@ -3588,6 +3599,7 @@ int dmar_find_matched_atsr_unit(struct pci_dev *dev) } ret = 0; out: + rcu_read_unlock(); return ret; } @@ -3604,7 +3616,7 @@ int __init dmar_parse_rmrr_atsr_dev(void) return ret; } - list_for_each_entry(atsr, &dmar_atsr_units, list) { + list_for_each_entry_rcu(atsr, &dmar_atsr_units, list) { ret = atsr_parse_dev(atsr); if (ret) return ret; |