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xen-devel
[Xen-devel] [PATCH 0/3] xen pvfb: Para-virtual framebuffer, keyboard and
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linux-kernel@xxxxxxxxxxxxxxx |
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Subject: |
[Xen-devel] [PATCH 0/3] xen pvfb: Para-virtual framebuffer, keyboard and pointer |
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From: |
Markus Armbruster <armbru@xxxxxxxxxx> |
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Date: |
Mon, 25 Feb 2008 14:00:16 +0100 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, linux-fbdev-devel@xxxxxxxxxxxxxxxxxxxxx, dmitry.torokhov@xxxxxxxxx, virtualization@xxxxxxxxxxxxxx, linux-input@xxxxxxxxxxxxxxx, adaplas@xxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, jayakumar.lkml@xxxxxxxxx |
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Mon, 25 Feb 2008 05:01:49 -0800 |
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This is a pair of Xen para-virtual frontend device drivers:
drivers/video/xen-fbfront.c provides a framebuffer, and
drivers/input/xen-kbdfront provides keyboard and mouse.
The backends run in dom0 user space.
Differences since last post:
* Required patch fixing 32-on-64 xen-blkfront included.
* Cleanup when xenkbd_probe() fails fixed.
* Don't store event channel in device info.
I started with the Xen version at
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/ca05cf1a9bdc
Differences to that Xen version, for those who care:
* Rewritten on top of fb deferred I/O
* IRQ handler names visible in /proc and /sys match the driver names.
* Use framebuffer helper functions appropriate for framebuffer in
system RAM.
* write() refreshes the framebuffer properly.
* off-by-one height of some screen refreshs fixed.
* Crash when register_framebuffer() fails fixed.
* Test for empty ring in input_handler() fixed.
* Deadlock in xen-kbdfront resume fixed.
* Cleanup when xenkbd_probe() fails fixed.
* General clean up.
I have a step-by-step patch series from that Xen version to my
version, if anybody is interested. Might be useful for reviewers
familiar with the Xen version.
The patch consists of three parts:
1. xen: Make xen-blkfront write its protocol ABI to xenstore
Could do without, but then I'd have to put the same bug in
xen-fbfront and xen-kbdfront.
2. fbdev: Make deferred I/O work as advertized
I need fb deferred I/O, but is utterly broken. A fix has been
floating around on linux-fbdev-devel as part of a larger patch,
which as far as I know has not been merged anywhere, yet. This is
just the fix.
2. xen pvfb: Para-virtual framebuffer, keyboard and pointer driver
The actual drivers.
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