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Date: Mon, 04 Mar 2013 11:49:07 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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To: Gleb Natapov <gleb@redhat.com>
CC: Hu Tao <hutao@cn.fujitsu.com>, kvm list <kvm@vger.kernel.org>,
        qemu-devel <qemu-devel@nongnu.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Daniel P. Berrange" <berrange@redhat.com>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        Jan Kiszka <jan.kiszka@siemens.com>, Blue Swirl <blauwirbel@gmail.com>,
        Eric Blake <eblake@redhat.com>, Andrew Jones <drjones@redhat.com>,
        Marcelo Tosatti <mtosatti@redhat.com>,
        Sasha Levin <levinsasha928@gmail.com>,
        Luiz Capitulino <lcapitulino@redhat.com>,
        Anthony Liguori <aliguori@us.ibm.com>,
        Markus Armbruster <armbru@redhat.com>,
        Stefan Hajnoczi <stefanha@redhat.com>,
        Juan Quintela <quintela@redhat.com>,
        Orit Wasserman <owasserm@redhat.com>, Kevin Wolf <kwolf@redhat.com>,
        Wen Congyang <wency@cn.fujitsu.com>,
        "Michael S. Tsirkin" <mst@redhat.com>, Alexander Graf <agraf@suse.de>,
        Alex Williamson <alex.williamson@redhat.com>,
        Peter Maydell <peter.maydell@linaro.org>
Subject: Re: [PATCH v13 0/8] pv event interface between host and guest
References: <cover.1362051581.git.hutao@cn.fujitsu.com> <20130303091738.GB23616@redhat.com> <513471F1.5020702@redhat.com> <20130304102131.GK23616@redhat.com> <51347735.9090204@redhat.com> <20130304104301.GL23616@redhat.com>
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Il 04/03/2013 11:43, Gleb Natapov ha scritto:
> > Anyhow, this does not apply to the next submission of this series.  I
> > think we can agree to the compromise of using ACPI but still read the
> > port in _STA.
> 
> If you want to make ioport configurable I do not see how can we avoid
> patching.

I want to make the ioport configurable in the device, but the PIIX and
ICH9 (which are what the DSDT is written for) will always use port 0x505.

You can configure a different iobase for your serial ports, the guest
can still use them but not discover them via ACPI.  This is the same thing.

Paolo