Re: [Qemu-devel] [PATCH V2 5/5] vga-cirrus: Workaround during restore when using Xen.

[Stefano Stabellini]

On Fri, 9 Dec 2011, Anthony PERARD wrote:
> During the initialisation of the machine at restore time, the access to the
> VRAM will fail because QEMU does not know yet the right guest address to map,
> so the vram_ptr is NULL.
> 
> So this patch avoid using a NULL pointer during initialisation, and try to get
> another vram_ptr if the call failed the first time.

I think it would be a good idea to split this patch into two patches:
one that avoids doing the memset on restore, because it is actually
futile in all cases; and another patch that tries to set the
vga.vram_ptr again in case it is still NULL.