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* intel_iommu, amd_iommu: allow UNMAP notifiersPeter Xu2016-09-271-3/+7
| | | | | | | | | | | | | | x86 vIOMMUs still lack of a complete IOMMU notifier mechanism. Before that is achieved, let's open a door for vhost DMAR support, which only requires cache invalidations (UNMAP operations). Meanwhile, convert hw_error() to error_report() and exit(1), to make the error messages cleaner and obvious (no CPU registers will be dumped). Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1474606948-14391-4-git-send-email-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* memory: introduce IOMMUOps.notify_flag_changedPeter Xu2016-09-271-2/+4
| | | | | | | | | | | The new interface can be used to replace the old notify_started() and notify_stopped(). Meanwhile it provides explicit flags so that IOMMUs can know what kind of notifications it is requested for. Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1474606948-14391-3-git-send-email-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* hw/i386: AMD IOMMU IVRS tableDavid Kiarie2016-09-241-0/+2
| | | | | | | | | Add IVRS table for AMD IOMMU. Generate IVRS or DMAR depending on emulated IOMMU. Signed-off-by: David Kiarie <davidkiarie4@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* hw/i386: Introduce AMD IOMMUDavid Kiarie2016-09-241-0/+1200
Add AMD IOMMU emulaton to Qemu in addition to Intel IOMMU. The IOMMU does basic translation, error checking and has a minimal IOTLB implementation. This IOMMU bypassed the need for target aborts by responding with IOMMU_NONE access rights and exempts the region 0xfee00000-0xfeefffff from translation as it is the q35 interrupt region. We advertise features that are not yet implemented to please the Linux IOMMU driver. IOTLB aims at implementing commands on real IOMMUs which is essential for debugging and may not offer any performance benefits Signed-off-by: David Kiarie <davidkiarie4@gmail.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>