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Date: Tue, 06 Sep 2011 11:06:23 +0800
From: Wen Congyang <wency@cn.fujitsu.com>
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Subject: Re: [Qemu-devel] [PATCH] pci: add standard bridge device
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To: Avi Kivity <avi@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Isaku Yamahata <yamahata@valinux.co.jp>, qemu-devel@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>

At 09/04/2011 04:25 PM, Avi Kivity Write:
> On 09/02/2011 05:56 AM, Wen Congyang wrote:
>> >
>> >  You could use something like kvm-unit-tests.git to write a simple test
>> >  that sets up a BAR (say from hw/ivshmem.c), writes and reads to see
>> that
>> >  it is visible, programs the bridge to filter part of the BAR out, then
>> >  writes and reads again to verify that the correct part is filtered
>> out.
>>
>> I am testing ivshmem now. But I do not know how to access the memory
>> specified in the BAR.
>>
>>
> 
> Use the uio driver -
> http://docs.blackfin.uclinux.org/kernel/generated/uio-howto/.  You just
> mmap() the BAR from userspace and play with it.

When I try to bind ivshmem to uio_pci_generic, I get the following messages:
uio_pci_generic 0000:01:01.0: No IRQ assigned to device: no support for interrupts?

Thanks
Wen Congyang