On 9/4/20 4:18 AM, Tom Murphy wrote:
+static int intel_iommu_needs_bounce_buffer(struct device *d)
+{
+ return !intel_no_bounce && dev_is_pci(d) && to_pci_dev(d)->untrusted;
+}
+
+
static void intel_iommu_probe_finalize(struct device *dev)
{
- struct iommu_domain *domain;
+ dma_addr_t base = IOVA_START_PFN << VTD_PAGE_SHIFT;
+ struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
- domain = iommu_get_domain_for_dev(dev);
- if (device_needs_bounce(dev))
- set_dma_ops(dev, &bounce_dma_ops);
- else if (domain && domain->type == IOMMU_DOMAIN_DMA)
- set_dma_ops(dev, &intel_dma_ops);
+ if (intel_iommu_needs_bounce_buffer(dev) ||
For untrusted devices, the DMA type of domain is enforced. There's no
need to check again here.
Best regards,
baolu
+ (domain && domain->type == IOMMU_DOMAIN_DMA))
+ iommu_setup_dma_ops(dev, base,
+ __DOMAIN_MAX_ADDR(dmar_domain->gaw) - base);
else
set_dma_ops(dev, NULL);
}
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