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Date: Thu, 31 Oct 2013 18:09:53 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] pvpanic plans?
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: pkrempa@redhat.com, lersek@redhat.com, marcel.a@redhat.com, libvir-list@redhat.com, Hu Tao <hutao@cn.fujitsu.com>, qemu-devel@nongnu.org, armbru@redhat.com, rhod@redhat.com, kraxel@redhat.com, anthony@codemonkey.ws, lcapitulino@redhat.com, afaerber@suse.de

Il 31/10/2013 18:00, Michael S. Tsirkin ha scritto:
> Interesting.  Why do we have
> -    { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED },
> then?

It's only for non-resumable states (such as pvpanic right now).

It's used here:

    if (qemu_reset_requested()) {
        pause_all_vcpus();
        cpu_synchronize_all_states();
        qemu_system_reset(VMRESET_REPORT);
        resume_all_vcpus();
        if (runstate_needs_reset()) {
            runstate_set(RUN_STATE_PAUSED);
        }
    }

Don't ask me what's happening with that resume_all_vcpus, because I have
no idea.  But I tested it now, and "system_reset" will indeed move you
from "paused (internal-error)" to "paused" with RIP=0xfffffff0.

Paolo