From: Anthony Liguori <aliguori@us.ibm.com>
To: Jon Smirl <jonsmirl@gmail.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Subject: Re: [RFC] Xen Virtual Framebuffer
Date: Mon, 05 Dec 2005 20:55:24 -0600 [thread overview]
Message-ID: <4394FD9C.1070409@us.ibm.com> (raw)
In-Reply-To: <9e4733910512051835q172f77d5o73b8bac6478bdea1@mail.gmail.com>
Jon Smirl wrote:
>After thinking about this for a while, wouldn't Xen be better off with
>a virtual VGA device instead of a virtual fbdev? The virtual VGA
>device will work for other operating systems as well as Linux.
>Implementing a VESA BIOS may be better than emulating VGA.
>http://www.vesa.org/public/VBE/vbecore3.pdf
>
>
This is how Qemu does it so it's what we do for VT. The VMI spec
(VMware paravirtual spec) assumes that you'll be doing device emulation
and calls for an emulated PCI bus. Xen achieves really good performance
though by avoiding device emulation. Native speed device emulation is
an active area of research though so this might not always be the case :-)
We don't currently do that in Xen though so it would be a considerable
amount of work to emulate a PCI bus and a VGA device (not to mention an
emu86 to be able to run the BIOS).
Regards,
Anthony Liguori
>--
>Jon Smirl
>jonsmirl@gmail.com
>
>
>
next prev parent reply other threads:[~2005-12-06 2:55 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-05 23:00 [RFC] Xen Virtual Framebuffer Anthony Liguori
2005-12-06 0:17 ` Anthony Liguori
2005-12-06 0:35 ` Jon Smirl
2005-12-06 1:09 ` Anthony Liguori
2005-12-06 1:19 ` Jon Smirl
2005-12-06 1:25 ` Anthony Liguori
2005-12-06 1:31 ` Jon Smirl
2005-12-06 2:13 ` Anthony Liguori
2005-12-06 2:35 ` Jon Smirl
2005-12-06 2:55 ` Anthony Liguori [this message]
2005-12-06 3:13 ` Jon Smirl
2005-12-06 4:45 ` 答复: [Xen-devel] " 苗枫
2005-12-06 5:08 ` Anthony Liguori
2005-12-09 21:54 ` Tracy R Reed
2005-12-11 2:27 ` Jon Smirl
2005-12-16 12:14 ` Jacob Gorm Hansen
2005-12-16 15:48 ` Jon Smirl
2005-12-19 10:32 ` Jacob Gorm Hansen
2005-12-19 15:01 ` Jon Smirl
2005-12-06 0:50 ` M.A. Williamson
2005-12-06 1:19 ` Anthony Liguori
2005-12-06 10:50 ` Gerd Knorr
2005-12-06 11:06 ` Jacob Gorm Hansen
2005-12-06 14:54 ` Jon Smirl
2005-12-11 2:38 ` Jon Smirl
2005-12-16 11:20 ` Gerd Knorr
2005-12-16 16:16 ` Jon Smirl
2005-12-16 17:01 ` Gerd Knorr
2005-12-16 17:28 ` Anthony Liguori
2005-12-16 17:23 ` Anthony Liguori
2005-12-19 10:57 ` Gerd Knorr
-- strict thread matches above, loose matches on Subject: below --
2005-12-06 0:48 James Harper
2005-12-06 0:53 ` M.A. Williamson
2005-12-06 1:13 ` Jon Smirl
2005-12-06 2:51 ` M.A. Williamson
2005-12-06 1:15 ` Jon Smirl
2005-12-06 14:18 ` Charles Duffy
2005-12-06 10:59 Petersson, Mats
2005-12-06 20:41 John Byrne
2005-12-06 20:52 ` Anthony Liguori
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