Re: [PATCH v6 11/19] vfio-user: handle PCI config space accesses

[Stefan Hajnoczi]

On Thu, Feb 17, 2022 at 02:48:58AM -0500, Jagannathan Raman wrote:
> Define and register handlers for PCI config space accesses
> 
> Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
> Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
> Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  hw/remote/vfio-user-obj.c | 45 +++++++++++++++++++++++++++++++++++++++
>  hw/remote/trace-events    |  2 ++
>  2 files changed, 47 insertions(+)

hw/pci/pci.c:pci_update_mappings() will unmap/map BARs when the
vfio-user client touches BARs. Please add a comment that the remote
machine type never dispatches memory accesses in the global memory address
space and therefore we don't care that multiple remote devices may set
up conflicting Memory and I/O Space BARs.

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