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s390x/pci: Set the iommu region size mpcifc request

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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: f7c40aa1e7 ("s390x/pci: fix failures of dma map/unmap")
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <1547125207-16907-2-git-send-email-pmorel@linux.ibm.com>
Acked-by: Collin Walling <walling@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Pierre Morel 2019-01-10 14:00:07 +01:00 • committed by Cornelia Huck
parent d57d6abc33
commit dbe9cf606c
1 changed files with 1 additions and 1 deletions
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2
hw/s390x/s390-pci-bus.c
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@ -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);