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Re: [Xen-devel] [PATCH v4 0/6] save/restore on Xen

On 01/24/2012 12:10 PM, Avi Kivity wrote:
But viewing RAM as just another device, having Xen only restore a
subset of devices should be a reasonable thing to do moving forward.
The main problem here I believe is that we have part of the VGA Bios
functionality in the hardware emulation.

Doesn't the main BIOS clear the screen first thing at boot?  Not even
sure the reset is needed.

Clearing the screen should only write to the RAM at 0xB8000 (and perhaps 0xA0000 since IIRC it's where text-mode fonts lie). The option ROM cannot even assume that the main BIOS knows about the VESA framebuffer, can it?


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