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Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode |
Date: |
Thu, 25 Aug 2011 13:28:55 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-08-25 13:19, Avi Kivity wrote:
> On 08/25/2011 01:51 PM, Jan Kiszka wrote:
>>>
>>> Plain F15 is slow. SR2 = SR4 = 0.
>>
>> So it's not using chain4 mode. Can you check what mode the adapter is
>> actually in and how VRAM is accessed? Likely, there is nothing we can do
>> about it. /me just wonders what makes F15 grub behave differently from
>> other distro's versions...
>>
>
> Do you remember offhand which registers I need to look at?
No, just that there are quite a few. You could check e.g.
http://www.osdever.net/FreeVGA/vga/vga.htm for descriptions. Also check
what paths the mmio handlers take.
>
> We need a collection of gdb scripts to find a qdev, dump the memory
> hierarchy, look up gpas, and get info about specific devices.
...or finally have a "device-show" monitor command to dump the device
state. More stable /wrt QEMU internals.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- [Qemu-devel] [PATCH v3 1/6] vmware-vga: Register reset service, (continued)
- [Qemu-devel] [PATCH v3 1/6] vmware-vga: Register reset service, Jan Kiszka, 2011/08/22
- [Qemu-devel] [PATCH v3 6/6] vga: Drop some unused fields, Jan Kiszka, 2011/08/22
- [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Jan Kiszka, 2011/08/22
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Avi Kivity, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Jan Kiszka, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Avi Kivity, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Jan Kiszka, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Avi Kivity, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Jan Kiszka, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode, Avi Kivity, 2011/08/25
- Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode,
Jan Kiszka <=
[Qemu-devel] [PATCH v3 4/6] vmware-vga: Eliminate vga_dirty_log_restart, Jan Kiszka, 2011/08/22
Re: [Qemu-devel] [PATCH v3 0/6] vga: dirty log cleanup, more linear mapping, Anthony Liguori, 2011/08/22