diff options
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 8aa580dc303..a08a53448b7 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -354,10 +354,18 @@ static int hw_pass_through = 1; /* si_domain contains mulitple devices */ #define DOMAIN_FLAG_STATIC_IDENTITY (1 << 2) +/* define the limit of IOMMUs supported in each domain */ +#ifdef CONFIG_X86 +# define IOMMU_UNITS_SUPPORTED MAX_IO_APICS +#else +# define IOMMU_UNITS_SUPPORTED 64 +#endif + struct dmar_domain { int id; /* domain id */ int nid; /* node id */ - unsigned long iommu_bmp; /* bitmap of iommus this domain uses*/ + DECLARE_BITMAP(iommu_bmp, IOMMU_UNITS_SUPPORTED); + /* bitmap of iommus this domain uses*/ struct list_head devices; /* all devices' list */ struct iova_domain iovad; /* iova's that belong to this domain */ @@ -569,7 +577,7 @@ static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) BUG_ON(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE); BUG_ON(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY); - iommu_id = find_first_bit(&domain->iommu_bmp, g_num_of_iommus); + iommu_id = find_first_bit(domain->iommu_bmp, g_num_of_iommus); if (iommu_id < 0 || iommu_id >= g_num_of_iommus) return NULL; @@ -582,7 +590,7 @@ static void domain_update_iommu_coherency(struct dmar_domain *domain) domain->iommu_coherency = 1; - for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { + for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) { if (!ecap_coherent(g_iommus[i]->ecap)) { domain->iommu_coherency = 0; break; @@ -596,7 +604,7 @@ static void domain_update_iommu_snooping(struct dmar_domain *domain) domain->iommu_snooping = 1; - for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { + for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) { if (!ecap_sc_support(g_iommus[i]->ecap)) { domain->iommu_snooping = 0; break; @@ -1332,7 +1340,7 @@ static struct dmar_domain *alloc_domain(void) return NULL; domain->nid = -1; - memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); + memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp)); domain->flags = 0; return domain; @@ -1358,7 +1366,7 @@ static int iommu_attach_domain(struct dmar_domain *domain, domain->id = num; set_bit(num, iommu->domain_ids); - set_bit(iommu->seq_id, &domain->iommu_bmp); + set_bit(iommu->seq_id, domain->iommu_bmp); iommu->domains[num] = domain; spin_unlock_irqrestore(&iommu->lock, flags); @@ -1383,7 +1391,7 @@ static void iommu_detach_domain(struct dmar_domain *domain, if (found) { clear_bit(num, iommu->domain_ids); - clear_bit(iommu->seq_id, &domain->iommu_bmp); + clear_bit(iommu->seq_id, domain->iommu_bmp); iommu->domains[num] = NULL; } spin_unlock_irqrestore(&iommu->lock, flags); @@ -1525,7 +1533,7 @@ static void domain_exit(struct dmar_domain *domain) dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); for_each_active_iommu(iommu, drhd) - if (test_bit(iommu->seq_id, &domain->iommu_bmp)) + if (test_bit(iommu->seq_id, domain->iommu_bmp)) iommu_detach_domain(domain, iommu); free_domain_mem(domain); @@ -1651,7 +1659,7 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment, spin_unlock_irqrestore(&iommu->lock, flags); spin_lock_irqsave(&domain->iommu_lock, flags); - if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) { + if (!test_and_set_bit(iommu->seq_id, domain->iommu_bmp)) { domain->iommu_count++; if (domain->iommu_count == 1) domain->nid = iommu->node; @@ -2400,12 +2408,17 @@ static int __init init_dmars(void) * endfor */ for_each_drhd_unit(drhd) { - g_num_of_iommus++; /* * lock not needed as this is only incremented in the single * threaded kernel __init code path all other access are read * only */ + if (g_num_of_iommus < IOMMU_UNITS_SUPPORTED) { + g_num_of_iommus++; + continue; + } + printk_once(KERN_ERR "intel-iommu: exceeded %d IOMMUs\n", + IOMMU_UNITS_SUPPORTED); } g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), @@ -3746,7 +3759,7 @@ static void domain_remove_one_dev_info(struct dmar_domain *domain, if (found == 0) { unsigned long tmp_flags; spin_lock_irqsave(&domain->iommu_lock, tmp_flags); - clear_bit(iommu->seq_id, &domain->iommu_bmp); + clear_bit(iommu->seq_id, domain->iommu_bmp); domain->iommu_count--; domain_update_iommu_cap(domain); spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags); @@ -3788,7 +3801,7 @@ static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) */ spin_lock_irqsave(&domain->iommu_lock, flags2); if (test_and_clear_bit(iommu->seq_id, - &domain->iommu_bmp)) { + domain->iommu_bmp)) { domain->iommu_count--; domain_update_iommu_cap(domain); } @@ -3813,7 +3826,7 @@ static struct dmar_domain *iommu_alloc_vm_domain(void) domain->id = vm_domid++; domain->nid = -1; - memset(&domain->iommu_bmp, 0, sizeof(unsigned long)); + memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp)); domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; return domain; |