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path: root/drivers/pci/intel-iommu.c
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Diffstat (limited to 'drivers/pci/intel-iommu.c')
-rw-r--r--drivers/pci/intel-iommu.c84
1 files changed, 46 insertions, 38 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 8d6159426311..417312528ddf 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -277,6 +277,7 @@ static int hw_pass_through = 1;
struct dmar_domain {
int id; /* domain id */
+ int nid; /* node id */
unsigned long iommu_bmp; /* bitmap of iommus this domain uses*/
struct list_head devices; /* all devices' list */
@@ -304,7 +305,7 @@ struct device_domain_info {
int segment; /* PCI domain */
u8 bus; /* PCI bus number */
u8 devfn; /* PCI devfn number */
- struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
+ struct pci_dev *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 */
};
@@ -386,30 +387,14 @@ static struct kmem_cache *iommu_domain_cache;
static struct kmem_cache *iommu_devinfo_cache;
static struct kmem_cache *iommu_iova_cache;
-static inline void *iommu_kmem_cache_alloc(struct kmem_cache *cachep)
+static inline void *alloc_pgtable_page(int node)
{
- unsigned int flags;
- void *vaddr;
-
- /* trying to avoid low memory issues */
- flags = current->flags & PF_MEMALLOC;
- current->flags |= PF_MEMALLOC;
- vaddr = kmem_cache_alloc(cachep, GFP_ATOMIC);
- current->flags &= (~PF_MEMALLOC | flags);
- return vaddr;
-}
-
+ struct page *page;
+ void *vaddr = NULL;
-static inline void *alloc_pgtable_page(void)
-{
- unsigned int flags;
- void *vaddr;
-
- /* trying to avoid low memory issues */
- flags = current->flags & PF_MEMALLOC;
- current->flags |= PF_MEMALLOC;
- vaddr = (void *)get_zeroed_page(GFP_ATOMIC);
- current->flags &= (~PF_MEMALLOC | flags);
+ page = alloc_pages_node(node, GFP_ATOMIC | __GFP_ZERO, 0);
+ if (page)
+ vaddr = page_address(page);
return vaddr;
}
@@ -420,7 +405,7 @@ static inline void free_pgtable_page(void *vaddr)
static inline void *alloc_domain_mem(void)
{
- return iommu_kmem_cache_alloc(iommu_domain_cache);
+ return kmem_cache_alloc(iommu_domain_cache, GFP_ATOMIC);
}
static void free_domain_mem(void *vaddr)
@@ -430,7 +415,7 @@ static void free_domain_mem(void *vaddr)
static inline void * alloc_devinfo_mem(void)
{
- return iommu_kmem_cache_alloc(iommu_devinfo_cache);
+ return kmem_cache_alloc(iommu_devinfo_cache, GFP_ATOMIC);
}
static inline void free_devinfo_mem(void *vaddr)
@@ -440,7 +425,7 @@ static inline void free_devinfo_mem(void *vaddr)
struct iova *alloc_iova_mem(void)
{
- return iommu_kmem_cache_alloc(iommu_iova_cache);
+ return kmem_cache_alloc(iommu_iova_cache, GFP_ATOMIC);
}
void free_iova_mem(struct iova *iova)
@@ -589,7 +574,8 @@ static struct context_entry * device_to_context_entry(struct intel_iommu *iommu,
root = &iommu->root_entry[bus];
context = get_context_addr_from_root(root);
if (!context) {
- context = (struct context_entry *)alloc_pgtable_page();
+ context = (struct context_entry *)
+ alloc_pgtable_page(iommu->node);
if (!context) {
spin_unlock_irqrestore(&iommu->lock, flags);
return NULL;
@@ -732,7 +718,7 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
if (!dma_pte_present(pte)) {
uint64_t pteval;
- tmp_page = alloc_pgtable_page();
+ tmp_page = alloc_pgtable_page(domain->nid);
if (!tmp_page)
return NULL;
@@ -868,7 +854,7 @@ static int iommu_alloc_root_entry(struct intel_iommu *iommu)
struct root_entry *root;
unsigned long flags;
- root = (struct root_entry *)alloc_pgtable_page();
+ root = (struct root_entry *)alloc_pgtable_page(iommu->node);
if (!root)
return -ENOMEM;
@@ -1263,6 +1249,7 @@ static struct dmar_domain *alloc_domain(void)
if (!domain)
return NULL;
+ domain->nid = -1;
memset(&domain->iommu_bmp, 0, sizeof(unsigned long));
domain->flags = 0;
@@ -1420,9 +1407,10 @@ static int domain_init(struct dmar_domain *domain, int guest_width)
domain->iommu_snooping = 0;
domain->iommu_count = 1;
+ domain->nid = iommu->node;
/* always allocate the top pgd */
- domain->pgd = (struct dma_pte *)alloc_pgtable_page();
+ domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
if (!domain->pgd)
return -ENOMEM;
__iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE);
@@ -1523,12 +1511,15 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment,
/* Skip top levels of page tables for
* iommu which has less agaw than default.
+ * Unnecessary for PT mode.
*/
- for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
- pgd = phys_to_virt(dma_pte_addr(pgd));
- if (!dma_pte_present(pgd)) {
- spin_unlock_irqrestore(&iommu->lock, flags);
- return -ENOMEM;
+ if (translation != CONTEXT_TT_PASS_THROUGH) {
+ for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
+ pgd = phys_to_virt(dma_pte_addr(pgd));
+ if (!dma_pte_present(pgd)) {
+ spin_unlock_irqrestore(&iommu->lock, flags);
+ return -ENOMEM;
+ }
}
}
}
@@ -1577,6 +1568,8 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment,
spin_lock_irqsave(&domain->iommu_lock, flags);
if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) {
domain->iommu_count++;
+ if (domain->iommu_count == 1)
+ domain->nid = iommu->node;
domain_update_iommu_cap(domain);
}
spin_unlock_irqrestore(&domain->iommu_lock, flags);
@@ -1611,7 +1604,7 @@ domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev,
return ret;
parent = parent->bus->self;
}
- if (pci_is_pcie(tmp)) /* this is a PCIE-to-PCI bridge */
+ if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */
return domain_context_mapping_one(domain,
pci_domain_nr(tmp->subordinate),
tmp->subordinate->number, 0,
@@ -1991,6 +1984,16 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev,
"IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
pci_name(pdev), start, end);
+ if (end < start) {
+ WARN(1, "Your BIOS is broken; RMRR ends before it starts!\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ ret = -EIO;
+ goto error;
+ }
+
if (end >> agaw_to_width(domain->agaw)) {
WARN(1, "Your BIOS is broken; RMRR exceeds permitted address width (%d bits)\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
@@ -3228,6 +3231,9 @@ static int device_notifier(struct notifier_block *nb,
struct pci_dev *pdev = to_pci_dev(dev);
struct dmar_domain *domain;
+ if (iommu_no_mapping(dev))
+ return 0;
+
domain = find_domain(pdev);
if (!domain)
return 0;
@@ -3319,7 +3325,7 @@ static void iommu_detach_dependent_devices(struct intel_iommu *iommu,
parent->devfn);
parent = parent->bus->self;
}
- if (pci_is_pcie(tmp)) /* this is a PCIE-to-PCI bridge */
+ if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */
iommu_detach_dev(iommu,
tmp->subordinate->number, 0);
else /* this is a legacy PCI bridge */
@@ -3455,6 +3461,7 @@ static struct dmar_domain *iommu_alloc_vm_domain(void)
return NULL;
domain->id = vm_domid++;
+ domain->nid = -1;
memset(&domain->iommu_bmp, 0, sizeof(unsigned long));
domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE;
@@ -3481,9 +3488,10 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width)
domain->iommu_coherency = 0;
domain->iommu_snooping = 0;
domain->max_addr = 0;
+ domain->nid = -1;
/* always allocate the top pgd */
- domain->pgd = (struct dma_pte *)alloc_pgtable_page();
+ domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
if (!domain->pgd)
return -ENOMEM;
domain_flush_cache(domain, domain->pgd, PAGE_SIZE);
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