On Wed, Mar 22, 2017 at 01:25:49PM +0100, Igor Mammedov wrote: > On Wed, 22 Mar 2017 11:03:44 +0100 > Thomas Huth <th...@redhat.com> wrote: > > On 22.03.2017 10:08, Markus Armbruster wrote: > > > Are we now ready to accept a simple & stupid patch that actually helps > > > users, say letting boards that care declare minimum and maximum RAM > > > size? And make PC reject RAM size less than 1MiB, even though "someone" > > > might conceivably have firmware that works with less? > > > > I'd say enforce a minimum RAM size on the normal "pc" and "q35" machine, > > but still allow smaller sizes on the "isapc" machine. So if "someone" > > comes around and claims to have a legacy firmware that wants less memory > > than 1MiB, just point them to the isapc machine. > > Just my 0.02 €. > > We can print warning that minimum size will be enforced in 1-2 > releases since 2.9/10 and when it's enforced send users that need > less to an old qemu version.
I did not think that QEMU ever worked on an x86 machine with less than 1MiB of ram. Certainly SeaBIOS has never supported it. I'm pretty sure that Bochs BIOS (qemu < v0.12) did not support it either - its ram detection system assumed a minimum of 1MiB. My $.02 - I agree with Markus - place a minimum limit of 1MiB on x86 machines. If someone is writing a new firmware, updating QEMU to change the limit is the very least of their concerns. -Kevin
