FC-HBA's MMIO resource are mapped to guest physical address and
machine address. I found both addresses need to be the same.
I created the series of patches which map MMIO resource to the same
address in guest physical address space and in machine address space.
After applying this patch, my FC-HBA worked and IOMMU page fault did
not occur.
The patches are for only discussion.
I'd like comments of developers.
> I think that MMIO resource mapped via p2m table should be mapped via
> IOMMU's page table too. In other word, XEN_DOMCTL_memory_mapping
> hypercall should update not only p2m table, but also IOMMU's page table.
Currently I don't think this is required.
Thanks,
Signed-off-by: Yuji Shimada <shimada-yxb@xxxxxxxxxxxxxxx>
--
Yuji Shimada

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Attachment: use_original_BAR_value.patch
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