Re: [Xen-devel] FC-HBA assigned to guest domain does not work.

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

The hvmloader side is perhaps plausible, since it only changes its behaviour
if qemu exposes an already-configured BAR. Fair enough. I don't think that
blanket always-use-physical-BAR-address is a great idea in qemu -- perhaps
if it could be configurable that would be okay.

 -- Keir

On 2/9/08 06:32, "Yuji Shimada" <shimada-yxb@xxxxxxxxxxxxxxx> wrote:

> 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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