iommu/vt-d: Simplify domain_context_mapping_one
Get rid of the special cases for VM domains vs. non-VM domains and simplify the code further to just handle the hardware passthrough vs. page-table case. Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -1942,24 +1942,21 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
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return 0;
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}
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context_clear_entry(context);
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id = domain->id;
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pgd = domain->pgd;
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if (domain_type_is_vm_or_si(domain)) {
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if (domain_type_is_vm(domain)) {
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id = __iommu_attach_domain(domain, iommu);
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if (id < 0) {
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spin_unlock_irqrestore(&iommu->lock, flags);
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pr_err("%s: No free domain ids\n", iommu->name);
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return -EFAULT;
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}
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}
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/* Skip top levels of page tables for
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* iommu which has less agaw than default.
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* Unnecessary for PT mode.
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context_clear_entry(context);
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context_set_domain_id(context, id);
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/*
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* Skip top levels of page tables for iommu which has less agaw
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* than default. Unnecessary for PT mode.
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*/
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if (translation != CONTEXT_TT_PASS_THROUGH) {
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for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
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@ -1969,25 +1966,20 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
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return -ENOMEM;
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}
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}
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}
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}
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context_set_domain_id(context, id);
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if (translation != CONTEXT_TT_PASS_THROUGH) {
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info = iommu_support_dev_iotlb(domain, iommu, bus, devfn);
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translation = info ? CONTEXT_TT_DEV_IOTLB :
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CONTEXT_TT_MULTI_LEVEL;
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}
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/*
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* In pass through mode, AW must be programmed to indicate the largest
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* AGAW value supported by hardware. And ASR is ignored by hardware.
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*/
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if (unlikely(translation == CONTEXT_TT_PASS_THROUGH))
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context_set_address_width(context, iommu->msagaw);
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else {
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context_set_address_root(context, virt_to_phys(pgd));
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context_set_address_width(context, iommu->agaw);
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} else {
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/*
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* In pass through mode, AW must be programmed to
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* indicate the largest AGAW value supported by
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* hardware. And ASR is ignored by hardware.
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*/
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context_set_address_width(context, iommu->msagaw);
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}
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context_set_translation_type(context, translation);
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