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[Qemu-devel] qemu doesn't like isapc


From: C.W. Betts
Subject: [Qemu-devel] qemu doesn't like isapc
Date: Mon, 26 May 2008 13:52:26 -0600

When I tried to run qemu with -M isapc, it crashes.  After poking around, it seems to call apic, which isn't available in ISA mode.
Line taken from apic.c, line 170 from function apic_local_deliver(…):
    APICState *s = env->apic_state;
    uint32_t lvt = s->lvt[vector];
The second line is where it chokes, but the first is where it messes up: env->apic_state is null and thus causes qemu to crash when it tries to access it. It is called from within pic_irq_request(…), if that's any help.  Note that this is only when I enable ISA mode and it is just fine on standard PC.

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