Re: [PATCH] kvm tools: adds a PCI device that exports a host shared segment as a PCI BAR in the guest

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On 25.08.2011, at 00:37, Pekka Enberg wrote:

> On 8/25/11 8:22 AM, Alexander Graf wrote:
>> 
>> On 25.08.2011, at 00:11, Pekka Enberg wrote:
>> 
>>> On Wed, 2011-08-24 at 23:52 -0500, Alexander Graf wrote:
>>>>> Isn't ivshmem in QEMU? If so, then I don't think there isn't any
>>>>> competition. How do you feel that these are competing?
>>>> 
>>>> Well, it means that you will inside the guest have two different
>>>> devices depending whether you're using QEMU or kvm-tool. I don't see
>>>> the point in exposing different devices to the guest just because of
>>>> NIH. Why should a guest care which device emulation framework you're
>>>> using?
>>> 
>>> It's a pretty special-purpose device that requires user configuration so
>>> I don't consider QEMU compatibility to be mandatory. It'd be nice to
>>> have but not something to bend over backwards for.
>> 
>> Well, the nice thing is that you would get the guest side for free:
>> 
>> http://gitorious.org/nahanni/guest-code/blobs/master/kernel_module/uio/uio_ivshmem.c
>> 
>> You also didn't invent your own virtio protocol, no? :)
> 
> No, because virtio drivers are in Linux kernel proper. Is ivshmem in the kernel tree
> or planned to be merged at some point?

*shrug* Let's ask Cam.


Alex

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