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memory: Fix IOMMU replay base address

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Since a788f227 "memory: Allow replay of IOMMU mapping notifications"
when new VFIO listener is added, all existing IOMMU mappings are
replayed. However there is a problem that the base address of
an IOMMU memory region (IOMMU MR) is ignored which is not a problem
for the existing user (which is pseries) with its default 32bit DMA
window starting at 0 but it is if there is another DMA window.

This stores the IOMMU's offset_within_address_space and adjusts
the IOVA before calling vfio_dma_map/vfio_dma_unmap.

As the IOMMU notifier expects IOVA offset rather than the absolute
address, this also adjusts IOVA in sPAPR H_PUT_TCE handler before
calling notifier(s).

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2016-05-26 09:43:23 -06:00 • committed by Alex Williamson
parent 7a057b4fb9
commit d78c19b5cf
3 changed files with 10 additions and 7 deletions
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2
hw/ppc/spapr_iommu.c
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@ -278,7 +278,7 @@ static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba,
tcet->table[index] = tce;
entry.target_as = &address_space_memory,
entry.iova = ioba & page_mask;
entry.iova = (ioba - tcet->bus_offset) & page_mask;
entry.translated_addr = tce & page_mask;
entry.addr_mask = ~page_mask;
entry.perm = spapr_tce_iommu_access_flags(tce);