Xen devel - Apr 2009 - [PATCH][qemu]Fix hvm guest cirrus_vga hvm s3 resume failure

Hi, Keir
 
This patch is for fixing hvm guest cirrus_vga hvm s3 resume failure.
 
We found latest Qemu (after Mar 3.10) will cause HVM guest vga fails to resume
back from S3.
It''s because vga_bios_init is not only needed during init, but also
needed after cirrus_vga
reset (hvm s3 will do qemu_reset).  

Also, we found the outdated s->vram_ptr reset will  cause s3 resume screen
black,
so we remove it. (win2000 boot up does not need it now)

We verified the fix with the latest cs/qemu.

Thanks a lot!
Regards,
Criping


 
 


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Thanks, Ian will have to check this one into the qemu repo.

 -- Keir

On 21/04/2009 07:53, "Ke, Liping" <liping.ke@intel.com> wrote:
> Hi, Keir
>  
> This patch is for fixing hvm guest cirrus_vga hvm s3 resume failure.
>  
> We found latest Qemu (after Mar 3.10) will cause HVM guest vga fails to
resume
> back from S3.
> It''s because vga_bios_init is not only needed during init, but
also needed
> after cirrus_vga
> reset (hvm s3 will do qemu_reset).
> 
> Also, we found the outdated s->vram_ptr reset will  cause s3 resume
screen
> black, 
> so we remove it. (win2000 boot up does not need it now)
> 
> We verified the fix with the latest cs/qemu.
> 
> Thanks a lot!
> Regards,
> Criping
> 
> 
>  
>  


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