Re: [Qemu-devel] [PATCH] qemu: x86: report lapic version as 0x14 instead of 0x11

[Gabriel L. Somlo]

On Sat, Mar 01, 2014 at 11:44:33AM +0800, Alexander Graf wrote:
> Deja vu :). Should we really set this to thd least compatible version or 
> rather to a current one that resembles roughly what we support? Otherwise 
> patches like this will come up for every new osx release.
> 
> What is the version in Haswell?

I don't know specifically about Haswell, but OS X has been checking
for lapic_version >= 14 ever since 10.5, same check, same number.

The latest Intel manual I could find (Feb.2014) says (Vol 3A, page 10-11)
that the version is contained in bits 0-8 of the version register, and
that values are 0x00 for the 82489 discrete apic, and 0x10 - 0x15 for
integrated apic, all other values are reserved.

So I guess we could make it 0x15 and be done with it for a (hopefully)
long time :)

--Gabriel