#define DEFAULT_DOMAIN_ADDRESS_WIDTH 48
#define MAX_AGAW_WIDTH 64
+#define MAX_AGAW_PFN_WIDTH (MAX_AGAW_WIDTH - VTD_PAGE_SHIFT)
#define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1)
#define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1)
static inline int agaw_to_width(int agaw)
{
- return 30 + agaw * LEVEL_STRIDE;
+ return min_t(int, 30 + agaw * LEVEL_STRIDE, MAX_AGAW_WIDTH);
}
static inline int width_to_agaw(int width)
{
- return (width - 30) / LEVEL_STRIDE;
+ return DIV_ROUND_UP(width - 30, LEVEL_STRIDE);
}
static inline unsigned int level_to_offset_bits(int level)
static inline unsigned long lvl_to_nr_pages(unsigned int lvl)
{
- return 1 << ((lvl - 1) * LEVEL_STRIDE);
+ return 1 << min_t(int, (lvl - 1) * LEVEL_STRIDE, MAX_AGAW_PFN_WIDTH);
}
/* VT-d pages must always be _smaller_ than MM pages. Otherwise things
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
unsigned int large_page = 1;
struct dma_pte *first_pte, *pte;
- int order;
BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width);
BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width);
} while (start_pfn && start_pfn <= last_pfn);
- order = (large_page - 1) * 9;
- return order;
+ return min_t(int, (large_page - 1) * 9, MAX_AGAW_PFN_WIDTH);
}
static void dma_pte_free_level(struct dmar_domain *domain, int level,
unsigned long nlongs;
ndomains = cap_ndoms(iommu->cap);
- pr_debug("IOMMU %d: Number of Domains supported <%ld>\n", iommu->seq_id,
- ndomains);
+ pr_debug("IOMMU%d: Number of Domains supported <%ld>\n",
+ iommu->seq_id, ndomains);
nlongs = BITS_TO_LONGS(ndomains);
spin_lock_init(&iommu->lock);
*/
iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL);
if (!iommu->domain_ids) {
- printk(KERN_ERR "Allocating domain id array failed\n");
+ pr_err("IOMMU%d: allocating domain id array failed\n",
+ iommu->seq_id);
return -ENOMEM;
}
iommu->domains = kcalloc(ndomains, sizeof(struct dmar_domain *),
GFP_KERNEL);
if (!iommu->domains) {
- printk(KERN_ERR "Allocating domain array failed\n");
+ pr_err("IOMMU%d: allocating domain array failed\n",
+ iommu->seq_id);
+ kfree(iommu->domain_ids);
+ iommu->domain_ids = NULL;
return -ENOMEM;
}
struct pci_dev *pdev;
int found;
- if (unlikely(dev->bus != &pci_bus_type))
+ if (unlikely(!dev_is_pci(dev)))
return 1;
pdev = to_pci_dev(dev);
}
/* domain id for virtual machine, it won't be set in context */
-static unsigned long vm_domid;
+static atomic_t vm_domid = ATOMIC_INIT(0);
static struct dmar_domain *iommu_alloc_vm_domain(void)
{
if (!domain)
return NULL;
- domain->id = vm_domid++;
+ domain->id = atomic_inc_return(&vm_domid);
domain->nid = -1;
memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp));
domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE;