Commit dbe9cf60 authored by Pierre Morel's avatar Pierre Morel Committed by Cornelia Huck
Browse files

s390x/pci: Set the iommu region size mpcifc request 



The size of the accessible iommu memory region in the guest
is given to the IOMMU by the guest through the mpcifc request
specifying the PCI Base Address and the PCI Address Limit.

Let's set the size of the IOMMU region to:
    (PCI Address Limit) - (PCI Base Address) + 1.

Fixes: f7c40aa1 ("s390x/pci: fix failures of dma map/unmap")
Signed-off-by: default avatarPierre Morel <pmorel@linux.ibm.com>
Message-Id: <1547125207-16907-2-git-send-email-pmorel@linux.ibm.com>
Acked-by: default avatarCollin Walling <walling@linux.ibm.com>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
parent d57d6abc

hw/s390x/s390-pci-bus.c

+1 −1
Original line number Diff line number Diff line
@@ -660,7 +660,7 @@ void s390_pci_iommu_enable(S390PCIIOMMU *iommu) 
    char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid);

    memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr),

                             TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr),

                             name, iommu->pal + 1);

                             name, iommu->pal - iommu->pba + 1);

    iommu->enabled = true;

    memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr));

    g_free(name);