On Tue, Jul 1, 2014 at 5:23 AM, Justus Winter <4win...@informatik.uni-hamburg.de> wrote: > Quoting David Michael (2014-06-23 00:31:57) >> Hi, >> >> On Sat, May 3, 2014 at 4:56 AM, Justus Winter >> <4win...@informatik.uni-hamburg.de> wrote: >> > However, when I use --enable-device-drivers=qemu it doesn't work: >> > >> > db> halt >> > Looking for RSDP. Scanning EBDA >> > Looking for RSDP. Scanning EBDA >> > rsdp1=0 >> > >> > Hum. Maybe someone overwrote our precious EBDA table (whatever that >> > is). It's supposed to be around physical address 0x40e. See acpi.c >> > for the code looking for the RSDP. >> >> It seems to work when acpi.c is patched to use the "Scanning BIOS" >> sections if it can't get the EDBA length. Changing "if (! ebda_len) >> return 0;" to just "if (edba_len)" does the trick, making the first >> loop conditional instead of calling off the search. > > If you can get it to work, then by all means, please do it :)
I've sent a patch that makes the described change, and I've been using it with QEMU for a week or two without issues so far. Thanks for working on this functionality; it's really useful. David
