Michael S. Tsirkin wrote: > On Mon, Dec 14, 2009 at 12:55:28PM +0100, Alexander Graf wrote: > >> Am 14.12.2009 um 11:59 schrieb "Michael S. Tsirkin" <m...@redhat.com>: >> >> >>> On Mon, Dec 14, 2009 at 11:16:34AM +0100, Gerd Hoffmann wrote: >>> >>>> On 12/14/09 10:44, Michael S. Tsirkin wrote: >>>> >>>>> No, it did not even start booting the kernel. Just gave me blank >>>>> screen. >>>>> >>>> [ testing ] >>>> >>>> Oh. That is something completely different. A bug in the rom >>>> loader. >>>> It fails to fit both e1000 (default nic) and virtio-net boot roms >>>> into >>>> the option rom area and bails out (before loading seabios). vl.c >>>> doesn't check the return value and happily continues (without bios). >>>> Which doesn't work out very well ... >>>> >>>> With two identical nics the (single) rom fits and qemu boots. >>>> >>>> Hmm. Of course vl.c must be fixed to check the return value. >>>> >>> Yes. >>> >>> >>>> Not sure how to deal with the rom size issue. The gPXE roms look >>>> quit >>>> big compared to the older roms we had. >>>> >>> Hmm, it's a regression then ... >>> >> How does real hw handle this? I'm pretty sure most servers these days >> use more option rom space than this. They usually have some onboard raid >> bios, external storage, on-board nic, pci nic, ... >> > > Real hardware might do several things I know about > - option rom is typically small. > - option rom is not loaded always (BIOS option), or not for all cards. > There are might be other tricks. >
There are probably other tricks. I was booting up a machine that had like 5 options roms going through their initialization that all weren't exactly small. >> So there must be some way to just have more option rom space. >> > > What do you mean? > Well, what's keeping us from having 5 MB of option roms? >> Implementing anything else would just be a waste of time. It'd break >> again when ppl do device assignment. >> >> Alex >> > > We need some solution for 0.12 though IMO. > This does not need to address device assignment, > but it must be simple. > Agreed. If there is a solution that gives us the chance to support an arbitrary number of option roms that wouldn't take forever to implement, I'd rather take that one though. Alex
