From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Frame buffer mmap not working in pvops dom0
Date: Wed, 21 Jul 2010 15:12:22 -0400
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> That looks like the VM_IO flag (_PAGE_IOMAP on the PTE) is not set somewhere.
> Do you have an idea what piece of kernel code gets triggered when QEMU does
> 'mmap' on the /dev/fb0?
> 
> On my machine where I use KMS/DRM it ends up calling 'ttm_fb_mmap'. But

err.. ttm_fbdev_mmap