iommu: Allocate dma-remapping structures using numa locality info
Allocate dma-remapping structures using numa locality info. On platforms having remapping hardware units span different nodes, this enables optimized dma-remapping transalation structures access by remapping hardware. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -277,6 +277,7 @@ static int hw_pass_through = 1;
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struct dmar_domain {
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int id; /* domain id */
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int nid; /* node id */
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unsigned long iommu_bmp; /* bitmap of iommus this domain uses*/
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struct list_head devices; /* all devices' list */
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@ -400,15 +401,18 @@ static inline void *iommu_kmem_cache_alloc(struct kmem_cache *cachep)
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}
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static inline void *alloc_pgtable_page(void)
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static inline void *alloc_pgtable_page(int node)
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{
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unsigned int flags;
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void *vaddr;
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struct page *page;
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void *vaddr = NULL;
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/* trying to avoid low memory issues */
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flags = current->flags & PF_MEMALLOC;
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current->flags |= PF_MEMALLOC;
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vaddr = (void *)get_zeroed_page(GFP_ATOMIC);
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page = alloc_pages_node(node, GFP_ATOMIC | __GFP_ZERO, 0);
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if (page)
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vaddr = page_address(page);
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current->flags &= (~PF_MEMALLOC | flags);
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return vaddr;
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}
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@ -589,7 +593,8 @@ static struct context_entry * device_to_context_entry(struct intel_iommu *iommu,
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root = &iommu->root_entry[bus];
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context = get_context_addr_from_root(root);
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if (!context) {
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context = (struct context_entry *)alloc_pgtable_page();
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context = (struct context_entry *)
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alloc_pgtable_page(iommu->node);
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if (!context) {
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spin_unlock_irqrestore(&iommu->lock, flags);
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return NULL;
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@ -732,7 +737,7 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
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if (!dma_pte_present(pte)) {
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uint64_t pteval;
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tmp_page = alloc_pgtable_page();
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tmp_page = alloc_pgtable_page(domain->nid);
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if (!tmp_page)
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return NULL;
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@ -868,7 +873,7 @@ static int iommu_alloc_root_entry(struct intel_iommu *iommu)
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struct root_entry *root;
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unsigned long flags;
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root = (struct root_entry *)alloc_pgtable_page();
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root = (struct root_entry *)alloc_pgtable_page(iommu->node);
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if (!root)
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return -ENOMEM;
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@ -1263,6 +1268,7 @@ static struct dmar_domain *alloc_domain(void)
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if (!domain)
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return NULL;
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domain->nid = -1;
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memset(&domain->iommu_bmp, 0, sizeof(unsigned long));
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domain->flags = 0;
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@ -1420,9 +1426,10 @@ static int domain_init(struct dmar_domain *domain, int guest_width)
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domain->iommu_snooping = 0;
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domain->iommu_count = 1;
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domain->nid = iommu->node;
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/* always allocate the top pgd */
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domain->pgd = (struct dma_pte *)alloc_pgtable_page();
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domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
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if (!domain->pgd)
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return -ENOMEM;
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__iommu_flush_cache(iommu, domain->pgd, PAGE_SIZE);
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@ -1577,6 +1584,8 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment,
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spin_lock_irqsave(&domain->iommu_lock, flags);
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if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) {
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domain->iommu_count++;
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if (domain->iommu_count == 1)
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domain->nid = iommu->node;
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domain_update_iommu_cap(domain);
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}
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spin_unlock_irqrestore(&domain->iommu_lock, flags);
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@ -3416,6 +3425,7 @@ static struct dmar_domain *iommu_alloc_vm_domain(void)
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return NULL;
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domain->id = vm_domid++;
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domain->nid = -1;
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memset(&domain->iommu_bmp, 0, sizeof(unsigned long));
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domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE;
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@ -3442,9 +3452,10 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width)
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domain->iommu_coherency = 0;
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domain->iommu_snooping = 0;
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domain->max_addr = 0;
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domain->nid = -1;
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/* always allocate the top pgd */
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domain->pgd = (struct dma_pte *)alloc_pgtable_page();
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domain->pgd = (struct dma_pte *)alloc_pgtable_page(domain->nid);
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if (!domain->pgd)
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return -ENOMEM;
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domain_flush_cache(domain, domain->pgd, PAGE_SIZE);
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