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[Qemu-devel] Re: [SeaBIOS] About cpu_set, CPU hotplug and related subjec
[Qemu-devel] Re: [SeaBIOS] About cpu_set, CPU hotplug and related subjects
Wed, 28 Apr 2010 13:30:21 +0300
On Wed, Apr 28, 2010 at 11:31:00AM +0200, Jes Sorensen wrote:
> On 04/22/10 03:12, Kevin O'Connor wrote:
> > As I understand it, the hotplug support was only in the kvm copy of
> > bochs bios. It also limited the number of cpus one could use (I think
> > 16).
> > The current smp support in SeaBIOS doesn't limit the number of cpus.
> > So, there has been reluctance to just port the old kvm bios code
> > forward.
> I believe the number was limited to 15, due to limits in a certain
> proprietary operating system.
> The issue with the AML code in BOCHS vs the code in Seabios is a bit
> tricky. The tables in BOCHS are a fair bit more complicated with the
> hotplug code and therefore statically generated, whereas Seabios
> generates them dynamically at boot time.
> Generating the more complex tables dynamically would be preferred, but
> it requires like half an AML compiler in Seabios, so it kinda stalled
We can try to be smart and generate most of the code statically and only
minimum that absolutely required dynamically. Haven't looked at how
simple dynamic part can be made.