Re: [Qemu-devel] [PATCH 2/2] target-i386: automatically raise cpuid level to 0xd

[Radim Krčmář]

2015-06-19 11:47+0200, Radim Krčmář:
> 2015-06-18 12:50-0300, Eduardo Habkost:
> > I have considered introducing "min-[x]level" and "max-{x]level"
> > properties to control automatic increasing of level/xlevel. The existing
> > X86CPUDefinition.level field could just control min_level, while
> > explicit "level=" on the command-line or config file would explicitly
> > force a specific value. Probably setting "max-level" on machine-type
> > compat code would be enough to restore the previous behavior.
> 
> We'd need to set min-level at least to 7, to capture the raising we do
                   ^^^^^^^^^

Should have been max-level.

(The alcohol level doesn't drop fast enough.)

> now, but a feature in level between default and 7 would result in a
> different behavior, so we need to make it much uglier :/
> We can add 'compat-level' bit for old machine types and raise to highest
> habited function otherwise, optionally with controls you described.