Date: Mon, 15 Apr 2013 11:37:55 -0600 From: "Justin T. Gibbs" <gibbs@freebsd.org> To: Bei Guan <gbtju85@gmail.com> Cc: soc-status <soc-status@freebsd.org> Subject: =?utf-8?Q?Re=3A_Mentor_of_the_Project_=22PCI_frontend_XEN_PV_dri?= =?utf-8?Q?ver=22=EF=BC=9F?= Message-ID: <7AB96913-9118-4298-B183-A3D5EBC6F209@freebsd.org> In-Reply-To: <CAEQjb-QGktoBNHAF4JqwyzJy01dO49b59chJ4k6WCrs_8FYnhQ@mail.gmail.com> References: <CAEQjb-RV30H9h8_tO%2BC0SkWAOi0DNF3G9xzpNFkj1_OKR%2ByLkw@mail.gmail.com> <920A79FE-8C56-4D26-8611-3CD48602FC3B@freebsd.org> <CAEQjb-QGktoBNHAF4JqwyzJy01dO49b59chJ4k6WCrs_8FYnhQ@mail.gmail.com>
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On Apr 12, 2013, at 3:02 AM, Bei Guan <gbtju85@gmail.com> wrote: > Thank you for your reply.=20 >=20 > 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. -- Justin
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