intel_iommu: simplify irq region translation
Now we have a standalone memory region for MSI, all the irq region requests should be redirected there. Cleaning up the block with an assertion instead. Reviewed-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -818,28 +818,12 @@ static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus,
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bool writes = true;
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VTDIOTLBEntry *iotlb_entry;
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/* Check if the request is in interrupt address range */
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if (vtd_is_interrupt_addr(addr)) {
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if (is_write) {
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/* FIXME: since we don't know the length of the access here, we
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* treat Non-DWORD length write requests without PASID as
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* interrupt requests, too. Withoud interrupt remapping support,
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* we just use 1:1 mapping.
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*/
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VTD_DPRINTF(MMU, "write request to interrupt address "
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"gpa 0x%"PRIx64, addr);
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entry->iova = addr & VTD_PAGE_MASK_4K;
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entry->translated_addr = addr & VTD_PAGE_MASK_4K;
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entry->addr_mask = ~VTD_PAGE_MASK_4K;
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entry->perm = IOMMU_WO;
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return;
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} else {
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VTD_DPRINTF(GENERAL, "error: read request from interrupt address "
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"gpa 0x%"PRIx64, addr);
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vtd_report_dmar_fault(s, source_id, addr, VTD_FR_READ, is_write);
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return;
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}
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}
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/*
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* We have standalone memory region for interrupt addresses, we
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* should never receive translation requests in this region.
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*/
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assert(!vtd_is_interrupt_addr(addr));
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/* Try to fetch slpte form IOTLB */
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iotlb_entry = vtd_lookup_iotlb(s, source_id, addr);
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if (iotlb_entry) {
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