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xen-devel
RE: [Xen-devel] intel agp card support 2
On Thu, 6 Jan 2005, Ian Pratt wrote:
> This might get you a stage further, but it will fail as soon as the
> driver tries to access the frame bufffer via /dev/mem. We really need to
> get to the bottom of whis this is failing on your system. Please can you
> post the output of 'xm dmesg'.
I should be clearer. What we do here is get vgabios into a file, and then
tell our emulator to use the file as the 'C segment' but to use /dev/mem
for everything else. In that way we init the physical hardware. X11 ought
to do this but I do not know if they support the option it at this point.
It's easy: our code is just mods to the X11 emulator.
Is there any easy way to dump the mfn's for a guest -- that would tell us
right away what is going on -- we should see pfn 0xc0 map to mfn
0xc0, i.e. dom 0 physical c0000 maps to vga bios at machine 0xc0000.
This is where having /proc/sys/xen/dom/#/{mem,mfn,etc} would be VERY handy
:-)
ron
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