Messages in this thread | | | Date | Fri, 09 Apr 2010 13:11:42 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 |
| |
On 04/09/2010 11:55 AM, Guenter Roeck wrote: > On Fri, 2010-04-09 at 14:23 -0400, H. Peter Anvin wrote: >> [Adding Guenter Roeck as he was commenting on something writing to the >> VGA area...] >> >> On 04/09/2010 10:22 AM, Yinghai wrote: >>> >>> then please check this one >>> >>> update e820 at first, and later put them resource tree, but give pci BAR chance to claim >>> the range, before assign unassigned resources. >>> >>> in case some system doesn't have VGA, and use [0xa0000, ..] for mmio of some other pci devices. >>> >> >> Do we have any evidence of any such system? >> >> Either which way, the patch looks saner... >> > Yes, we have a system which does not have VGA and uses the VGA memory > space for another device. I don't know exactly what for, but I can find > out if it is relevant. >
Quite. We really need to consider if that kind of devices should be supported.
-hpa
| |