Re: [Qemu-devel] [PATCH] 40p: remove pci_allow_0_address = true from 40p machine class

2018-06-04 Thread David Gibson
On Fri, May 25, 2018 at 10:15:23PM +0100, Mark Cave-Ayland wrote: > The Linux sandalfoot zImage has an initialisation process which resets the > VGA controller by setting all the BAR addresses to zero to access the VGA > ioports at their legacy addresses. > > Unfortunately setting the framebuffer

[Qemu-devel] [PATCH] 40p: remove pci_allow_0_address = true from 40p machine class

2018-05-25 Thread Mark Cave-Ayland
The Linux sandalfoot zImage has an initialisation process which resets the VGA controller by setting all the BAR addresses to zero to access the VGA ioports at their legacy addresses. Unfortunately setting the framebuffer BAR to address 0 makes the framebuffer memory overlap the internal VGA