Re: Mentor of the Project "PCI frontend XEN PV driver"？

[Bei Guan]

The attachment is the boot output of the 32-bit FreeBSD compiled with
XENHVM config.


2013/4/18 Bei Guan <gbtju85 at gmail.com>

>
>
>
> 2013/4/16 Justin T. Gibbs <gibbs at freebsd.org>
>
> On Apr 12, 2013, at 3:02 AM, Bei Guan <gbtju85 at gmail.com> wrote:
>>
>> > Thank you for your reply.
>> >
>> > I think it's also a good project for me to write a SCSI or USB PV
>> frontend for FreeBSD. I'm interest in Xen and have done some development
>> about Xen PV and HVM, but I didn't do any development on FreeBSD. As to
>> this project, where should I start? Is there any other similar FreeBSD
>> project I can refer to?
>>
>> Front-end drivers for network, block, and control already exist and
>> should serve as a good starting point for the creation of another PV driver.
>>
>> I've also updated the ideas page to include more information about our
>> existing XEN implementation and what will be required for these projects.
>>
>> > In order to write a SCSI or USB PV driver, do we need the Xen PV
>> drivers in FreeBSD, such as event channel, hypercalls, xenbus, and so on?
>>
>> Yes, FreeBSD already has support for all XenBus APIs needed to write
>> these drivers.  See "sys/xen" and "sys/dev/xen" in the FreeBSD kernel
>> source tree.
>>
>> > You said the "drivers can be developed using an HVM guest", can you
>> give me more information about it?
>>
>> Typically, you install FreeBSD using standard install media as a full HVM
>> guest on a system running Xen.  Then compile a custom kernel using the
>> XENHVM config file in order to activate the existing PV drivers.
>>
> Hi Justin,
>
> Does this project need to provide USB/SCSI PV drivers to both 32-bit and
> 64-bit FreeBSD?
> I've compiled the FreeBSD 8.3 (i386) as Xen DomU with the XENHVM config.
> But, It cannot boot successfully. The screenshot is attached.
> According to the page https://wiki.freebsd.org/FreeBSD/Xen , 32-bit
> FreeBSD should work when compiled with XENHVM config.
>
> I will try the 64-bit FreeBSD. However, if the FreeBSD boot successfully
> (compiled with XENHVM config), how can we know it really uses the PV
> drivers instead of the native drivers?
>
>
> Thanks,
> Bei Guan
>
>
>
>>
>> --
>> Justin
>>
>>
>
>


-- 
Best Regards,
Bei Guan