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[Qemu-devel] APIC is missing with -cpu=pentium which is not architectura
From: |
Bryan O'Donoghue |
Subject: |
[Qemu-devel] APIC is missing with -cpu=pentium which is not architecturally true of x86 |
Date: |
Sun, 29 Jul 2012 23:26:20 +0100 |
Greetings QEMUers.
Love QEMU - use it every day.
I have noticed a small architectural flaw with QEMU. When passing -cpu=pentium LAPIC is non functional (reads back all zeros).
Perhaps this has been updated in later versions of QEMU, if not I suggest simply adding an "-lapic" type option to QEMU command line options.
While most Pentium machines did not have APICs per se, the whole SMP thing took off with classic pentium (p5) - and there are a few systems with LAPIC and IO/APIC support.
It's a pedantic point but, worth implementing correctly.
Cheers and great work.
Bryan
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