Commit 6c5e7402 authored by Yi Min Zhao's avatar Yi Min Zhao Committed by Cornelia Huck
Browse files

s390x/pci: add iommu replay callback 



Let's introduce iommu replay callback for s390 pci iommu memory region.
Currently we don't need any dma mapping replay. So let it return
directly. This implementation will avoid meaningless loops calling
translation callback.

Reviewed-by: default avatarPierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: default avatarHalil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: default avatarYi Min Zhao <zyimin@linux.vnet.ibm.com>
Message-Id: <1504606380-49341-4-git-send-email-zyimin@linux.vnet.ibm.com>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
parent 01c36195

hw/s390x/s390-pci-bus.c

+12 −0
Original line number Diff line number Diff line
@@ -397,6 +397,17 @@ static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr, 
    return ret;

}



static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu,

                                  IOMMUNotifier *notifier)

{

    /* It's impossible to plug a pci device on s390x that already has iommu

     * mappings which need to be replayed, that is due to the "one iommu per

     * zpci device" construct. But when we support migration of vfio-pci

     * devices in future, we need to revisit this.

     */

    return;

}



static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus,

                                        int devfn)

{
@@ -1045,6 +1056,7 @@ static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data) 
    IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);



    imrc->translate = s390_translate_iommu;

    imrc->replay = s390_pci_iommu_replay;

}



static const TypeInfo s390_iommu_memory_region_info = {