iommu/vt-d: Don't pre-allocate domain ids for si_domain

There is no reason for this special handling of the
si_domain. The per-iommu domain-id can be allocated
on-demand like for any other domain. So remove the
pre-allocation code.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 380b4e2..2a64c3f 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2558,37 +2558,18 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width);
 
 static int __init si_domain_init(int hw)
 {
-       struct dmar_drhd_unit *drhd;
-       struct intel_iommu *iommu;
        int nid, ret = 0;
-       bool first = true;
 
        si_domain = alloc_domain(DOMAIN_FLAG_STATIC_IDENTITY);
        if (!si_domain)
                return -EFAULT;
 
-       for_each_active_iommu(iommu, drhd) {
-               ret = iommu_attach_domain(si_domain, iommu);
-               if (ret < 0) {
-                       domain_exit(si_domain);
-                       return -EFAULT;
-               } else if (first) {
-                       si_domain->id = ret;
-                       first = false;
-               } else if (si_domain->id != ret) {
-                       domain_exit(si_domain);
-                       return -EFAULT;
-               }
-               domain_attach_iommu(si_domain, iommu);
-       }
-
        if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
                domain_exit(si_domain);
                return -EFAULT;
        }
 
-       pr_debug("Identity mapping domain is domain %d\n",
-                si_domain->id);
+       pr_debug("Identity mapping domain allocated\n");
 
        if (hw)
                return 0;
@@ -4197,13 +4178,6 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
        iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);
        iommu_enable_translation(iommu);
 
-       if (si_domain) {
-               ret = iommu_attach_domain(si_domain, iommu);
-               if (ret < 0 || si_domain->id != ret)
-                       goto disable_iommu;
-               domain_attach_iommu(si_domain, iommu);
-       }
-
        iommu_disable_protect_mem_regions(iommu);
        return 0;