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iommu/vt-d: Avoid iova flush queue in strict mode
If Intel IOMMU strict mode is enabled by users, it's unnecessary to create the iova flush queue. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -1858,10 +1858,12 @@ static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu,
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init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
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err = init_iova_flush_queue(&domain->iovad,
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iommu_flush_iova, iova_entry_free);
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if (err)
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return err;
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if (!intel_iommu_strict) {
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err = init_iova_flush_queue(&domain->iovad,
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iommu_flush_iova, iova_entry_free);
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if (err)
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return err;
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}
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domain_reserve_special_ranges(domain);
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@ -5199,6 +5201,7 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
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{
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struct dmar_domain *dmar_domain;
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struct iommu_domain *domain;
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int ret;
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switch (type) {
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case IOMMU_DOMAIN_DMA:
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@ -5215,11 +5218,14 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
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return NULL;
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}
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if (type == IOMMU_DOMAIN_DMA &&
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init_iova_flush_queue(&dmar_domain->iovad,
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iommu_flush_iova, iova_entry_free)) {
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pr_warn("iova flush queue initialization failed\n");
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intel_iommu_strict = 1;
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if (!intel_iommu_strict && type == IOMMU_DOMAIN_DMA) {
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ret = init_iova_flush_queue(&dmar_domain->iovad,
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iommu_flush_iova,
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iova_entry_free);
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if (ret) {
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pr_warn("iova flush queue initialization failed\n");
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intel_iommu_strict = 1;
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}
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}
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domain_update_iommu_cap(dmar_domain);
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