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s390x/pci: fix failures of dma map/unmap 

In commit d78c19b5cf, vfio code stores
the IOMMU's offset_within_address_space and adjusts the IOVA before
calling vfio_dma_map/vfio_dma_unmap. But s390_translate_iommu already
considers the base address of an IOMMU memory region.

Thus we use pal as the size and 0x0 as the base address to initialize
IOMMU memory subregion.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Yi Min Zhao 2016-06-19 19:20:46 +08:00 committed by Cornelia Huck
parent b804e8a62a
commit f7c40aa1e7
1 changed files with 2 additions and 4 deletions
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6
hw/s390x/s390-pci-bus.c
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@ -498,11 +498,9 @@ static const MemoryRegionOps s390_msi_ctrl_ops = {
void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
{
uint64_t size = pbdev->pal - pbdev->pba + 1;
memory_region_init_iommu(&pbdev->iommu_mr, OBJECT(&pbdev->mr),
&s390_iommu_ops, "iommu-s390", size);
memory_region_add_subregion(&pbdev->mr, pbdev->pba, &pbdev->iommu_mr);
&s390_iommu_ops, "iommu-s390", pbdev->pal + 1);
memory_region_add_subregion(&pbdev->mr, 0, &pbdev->iommu_mr);
pbdev->iommu_enabled = true;
}