From: Paolo Bonzini <pbonzini@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
kvm list <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Hu Tao <hutao@cn.fujitsu.com>, qemu-devel <qemu-devel@nongnu.org>,
Markus Armbruster <armbru@redhat.com>,
Blue Swirl <blauwirbel@gmail.com>,
Orit Wasserman <owasserm@redhat.com>,
Juan Quintela <quintela@redhat.com>,
Alexander Graf <agraf@suse.de>,
Jan Kiszka <jan.kiszka@siemens.com>,
Andrew Jones <drjones@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Sasha Levin <levinsasha928@gmail.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Luiz Capitulino <lcapitulino@redhat.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Kevin Wolf <kwolf@redhat.com>,
Anthony Liguori <aliguori@us.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v13 0/8] pv event interface between host and guest
Date: Mon, 04 Mar 2013 13:21:10 +0100 [thread overview]
Message-ID: <513491B6.6050706@redhat.com> (raw)
In-Reply-To: <20130304115207.GO23616@redhat.com>
Il 04/03/2013 12:52, Gleb Natapov ha scritto:
> > Same here, you can remove the panic event port and add debugcon at
> > 0x505. That's the problematic case. But if the user goes to that
> > length, I think we can honestly say we don't care.
>
> IMO there is a big difference between well know serial ISA ports and
> PIO ports we allocate for our devices. Later have to be discoverable
> without resorting to probing. On CPU level we do the same with CPUID
> bits instead of relaying on MSRs #GP. On KVM API level we do the same
> with capabilities instead of relying on ioctls returning errors. This
> is not different.
Ok, I see your point now. Yes, this is a good reason why patching is
better in the long run.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
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
Date: Mon, 04 Mar 2013 13:21:10 +0100 [thread overview]
Message-ID: <513491B6.6050706@redhat.com> (raw)
In-Reply-To: <20130304115207.GO23616@redhat.com>
Il 04/03/2013 12:52, Gleb Natapov ha scritto:
> > Same here, you can remove the panic event port and add debugcon at
> > 0x505. That's the problematic case. But if the user goes to that
> > length, I think we can honestly say we don't care.
>
> IMO there is a big difference between well know serial ISA ports and
> PIO ports we allocate for our devices. Later have to be discoverable
> without resorting to probing. On CPU level we do the same with CPUID
> bits instead of relaying on MSRs #GP. On KVM API level we do the same
> with capabilities instead of relying on ioctls returning errors. This
> is not different.
Ok, I see your point now. Yes, this is a good reason why patching is
better in the long run.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
kvm list <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Hu Tao <hutao@cn.fujitsu.com>, qemu-devel <qemu-devel@nongnu.org>,
Markus Armbruster <armbru@redhat.com>,
Blue Swirl <blauwirbel@gmail.com>,
Orit Wasserman <owasserm@redhat.com>,
Juan Quintela <quintela@redhat.com>,
Alexander Graf <agraf@suse.de>,
Jan Kiszka <jan.kiszka@siemens.com>,
Andrew Jones <drjones@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Sasha Levin <levinsasha928@gmail.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Luiz Capitulino <lcapitulino@redhat.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Kevin Wolf <kwolf@redhat.com>,
Anthony Liguori <aliguori@us.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [Qemu-devel] [PATCH v13 0/8] pv event interface between host and guest
Date: Mon, 04 Mar 2013 13:21:10 +0100 [thread overview]
Message-ID: <513491B6.6050706@redhat.com> (raw)
In-Reply-To: <20130304115207.GO23616@redhat.com>
Il 04/03/2013 12:52, Gleb Natapov ha scritto:
> > Same here, you can remove the panic event port and add debugcon at
> > 0x505. That's the problematic case. But if the user goes to that
> > length, I think we can honestly say we don't care.
>
> IMO there is a big difference between well know serial ISA ports and
> PIO ports we allocate for our devices. Later have to be discoverable
> without resorting to probing. On CPU level we do the same with CPUID
> bits instead of relaying on MSRs #GP. On KVM API level we do the same
> with capabilities instead of relying on ioctls returning errors. This
> is not different.
Ok, I see your point now. Yes, this is a good reason why patching is
better in the long run.
Paolo
next prev parent reply other threads:[~2013-03-04 12:21 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-28 12:13 [PATCH v13 0/8] pv event interface between host and guest Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-02-28 12:13 ` [PATCH v13] kvm: notify host when the guest is panicked Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-02-28 12:13 ` [PATCH v13 1/8] save/load cpu runstate Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-02-28 21:12 ` Eric Blake
2013-02-28 21:12 ` Eric Blake
2013-03-01 7:36 ` Hu Tao
2013-03-01 7:36 ` [Qemu-devel] " Hu Tao
2013-03-01 7:36 ` Hu Tao
2013-03-01 16:29 ` Eric Blake
2013-03-01 16:29 ` [Qemu-devel] " Eric Blake
2013-03-01 16:29 ` Eric Blake
2013-03-04 9:30 ` Paolo Bonzini
2013-03-04 9:30 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 9:30 ` Paolo Bonzini
2013-03-05 2:33 ` Hu Tao
2013-03-05 2:33 ` [Qemu-devel] " Hu Tao
2013-03-05 2:33 ` Hu Tao
2013-03-05 8:24 ` Paolo Bonzini
2013-03-05 8:24 ` [Qemu-devel] " Paolo Bonzini
2013-03-05 8:24 ` Paolo Bonzini
2013-02-28 12:13 ` [PATCH v13 2/8] start vm after resetting it Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-02-28 13:23 ` Jan Kiszka
2013-02-28 13:23 ` Jan Kiszka
2013-03-05 3:05 ` Hu Tao
2013-03-05 3:05 ` [Qemu-devel] " Hu Tao
2013-03-05 3:05 ` Hu Tao
2013-03-04 9:32 ` Paolo Bonzini
2013-03-04 9:32 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 9:32 ` Paolo Bonzini
2013-03-05 3:06 ` Hu Tao
2013-03-05 3:06 ` [Qemu-devel] " Hu Tao
2013-03-05 3:06 ` Hu Tao
2013-02-28 12:13 ` [PATCH v13 3/8] update kernel headers Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-02-28 12:13 ` [PATCH v13 4/8] add a new runstate: RUN_STATE_GUEST_PANICKED Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-03-04 9:40 ` Paolo Bonzini
2013-03-04 9:40 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 9:40 ` Paolo Bonzini
2013-03-05 3:17 ` Hu Tao
2013-03-05 3:17 ` [Qemu-devel] " Hu Tao
2013-03-05 3:17 ` Hu Tao
2013-03-05 8:26 ` Paolo Bonzini
2013-03-05 8:26 ` [Qemu-devel] " Paolo Bonzini
2013-03-05 8:26 ` Paolo Bonzini
2013-03-06 9:03 ` Hu Tao
2013-03-06 9:03 ` [Qemu-devel] " Hu Tao
2013-03-06 9:03 ` Hu Tao
2013-02-28 12:13 ` [PATCH v13 5/8] add a new qevent: QEVENT_GUEST_PANICKED Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-03-01 16:31 ` Eric Blake
2013-03-01 16:31 ` [Qemu-devel] " Eric Blake
2013-03-01 16:31 ` Eric Blake
2013-03-05 3:17 ` Hu Tao
2013-03-05 3:17 ` [Qemu-devel] " Hu Tao
2013-03-05 3:17 ` Hu Tao
2013-03-04 9:40 ` Paolo Bonzini
2013-03-04 9:40 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 9:40 ` Paolo Bonzini
2013-02-28 12:13 ` [PATCH v13 6/8] introduce a new qom device to deal with panicked event Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-03-04 9:42 ` Paolo Bonzini
2013-03-04 9:42 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 9:42 ` Paolo Bonzini
2013-03-04 10:10 ` Christian Borntraeger
2013-03-04 10:10 ` [Qemu-devel] " Christian Borntraeger
2013-03-04 10:21 ` Paolo Bonzini
2013-03-04 10:21 ` [Qemu-devel] " Paolo Bonzini
2013-02-28 12:13 ` [PATCH v13 7/8] allower the user to disable pv event support Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-03-04 9:47 ` Paolo Bonzini
2013-03-04 9:47 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 9:47 ` Paolo Bonzini
2013-02-28 12:13 ` [PATCH v13 8/8] pv event: add document to describe the usage Hu Tao
2013-02-28 12:13 ` Hu Tao
2013-03-03 9:17 ` [PATCH v13 0/8] pv event interface between host and guest Gleb Natapov
2013-03-03 9:17 ` [Qemu-devel] " Gleb Natapov
2013-03-03 9:17 ` Gleb Natapov
2013-03-04 10:05 ` Paolo Bonzini
2013-03-04 10:05 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 10:05 ` Paolo Bonzini
2013-03-04 10:21 ` Gleb Natapov
2013-03-04 10:21 ` [Qemu-devel] " Gleb Natapov
2013-03-04 10:21 ` Gleb Natapov
2013-03-04 10:28 ` Paolo Bonzini
2013-03-04 10:28 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 10:43 ` Gleb Natapov
2013-03-04 10:43 ` [Qemu-devel] " Gleb Natapov
2013-03-04 10:43 ` Gleb Natapov
2013-03-04 10:49 ` Paolo Bonzini
2013-03-04 10:49 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 10:49 ` Paolo Bonzini
2013-03-04 10:59 ` Gleb Natapov
2013-03-04 10:59 ` [Qemu-devel] " Gleb Natapov
2013-03-04 10:59 ` Gleb Natapov
2013-03-04 11:10 ` Paolo Bonzini
2013-03-04 11:10 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 11:10 ` Paolo Bonzini
2013-03-04 11:20 ` Gleb Natapov
2013-03-04 11:20 ` [Qemu-devel] " Gleb Natapov
2013-03-04 11:20 ` Gleb Natapov
2013-03-04 11:35 ` Paolo Bonzini
2013-03-04 11:35 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 11:35 ` Paolo Bonzini
2013-03-04 11:52 ` Gleb Natapov
2013-03-04 11:52 ` [Qemu-devel] " Gleb Natapov
2013-03-04 11:52 ` Gleb Natapov
2013-03-04 12:21 ` Paolo Bonzini [this message]
2013-03-04 12:21 ` [Qemu-devel] " Paolo Bonzini
2013-03-04 12:21 ` Paolo Bonzini
2013-03-06 8:56 ` Hu Tao
2013-03-06 8:56 ` [Qemu-devel] " Hu Tao
2013-03-06 8:56 ` Hu Tao
2013-03-06 9:07 ` Paolo Bonzini
2013-03-06 9:07 ` [Qemu-devel] " Paolo Bonzini
2013-03-06 9:28 ` li guang
2013-03-06 9:28 ` li guang
2013-03-06 9:38 ` Gleb Natapov
2013-03-06 9:38 ` [Qemu-devel] " Gleb Natapov
2013-03-06 9:38 ` Gleb Natapov
2013-03-06 9:48 ` Paolo Bonzini
2013-03-06 9:48 ` [Qemu-devel] " Paolo Bonzini
2013-03-06 9:48 ` Paolo Bonzini
2013-03-06 9:59 ` Gleb Natapov
2013-03-06 9:59 ` [Qemu-devel] " Gleb Natapov
2013-03-06 9:59 ` Gleb Natapov
2013-03-06 8:46 ` Hu Tao
2013-03-06 8:46 ` [Qemu-devel] " Hu Tao
2013-03-06 8:46 ` Hu Tao
2013-03-06 9:37 ` Gleb Natapov
2013-03-06 9:37 ` [Qemu-devel] " Gleb Natapov
2013-03-06 9:37 ` Gleb Natapov
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