[Qemu-devel] couid for x86 CPUs

[Ronald Aigner]

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Hi,
Version 0.7.2 from the Website returns invalid cache size for the i386
architecture.
Currently the 'cpuid' instruction with eax==1 returns a processor ID of
0x633 that is an "Intel Pentium II (Klamath)". The Klamath is specified
with 512kB of L2 Cache (see
http://www.pcguide.com/ref/cpu/fam/g6PII-c.html).
However the 'cpuid' instruction with eax==2 returns a descriptor value
of 0x41, which indicates 128kB of L2 Cache (see
http://faydoc.tripod.com/cpu/cpuid.htm). The correct value should be 0x43.
To fix this, line 1317 in file target-i386/helper.c should read:
EAX = 0x430601;

Thanks, Ron.

PS: A hint on the website on where to post bug-reports would be helpful.

PPS: Please include me into reply. I'm not subscribed to the list.
- --
Mit freundlichen Gruessen / with regards
ra3 @ inf.tu-dresden.de
http://os.inf.tu-dresden.de/~ra3/
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