Alexander, so I assume the following patchset should be enough for you to implement u3 support, simply by creating your own rwhandler, and using pci_data_read/write directly there. I have pushed it to a temporary branch in my tree: git://git.kernel.org/pub/scm/linux/kernel/git/mst/qemu.git rwhandler
Paul, any comments on this approach? I'll push this to my pci tree if this turns out to be helpful. Hope this helps, and sorry about the churn. Michael S. Tsirkin (3): bwap: add qemu_bswap helper rwhandler: simplified way to register for mem/io pci_host: rewrite using rwhandler Makefile.target | 1 + bswap.h | 6 ++ hw/pci_host.c | 172 +++++++++++++++++++---------------------------- hw/pci_host.h | 4 + hw/pci_host_template.h | 109 ------------------------------ rwhandler.c | 91 +++++++++++++++++++++++++ rwhandler.h | 27 ++++++++ 7 files changed, 199 insertions(+), 211 deletions(-) delete mode 100644 hw/pci_host_template.h create mode 100644 rwhandler.c create mode 100644 rwhandler.h
