From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>, <cross-distro@lists.linaro.org>,
"Ian Campbell" <ian.campbell@citrix.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Peter Maydell <peter.maydell@linaro.org>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
Michael Casadevall <Michael.casadevall@linaro.org>,
Rob Herring <rob.herring@linaro.org>, <xen-devel@lists.xen.org>,
Robie Basak <robie.basak@canonical.com>,
"Stefano Stabellini" <stefano.stabellini@citrix.com>,
<linux-arm-kernel@lists.infradead.org>,
Grant Likely <grant.likely@linaro.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: [RFC] ARM VM System Sepcification
Date: Thu, 27 Feb 2014 12:31:55 +0000 [thread overview]
Message-ID: <alpine.DEB.2.02.1402271229370.31489@kaball.uk.xensource.com> (raw)
In-Reply-To: <20140226214843.GD12169@bivouac.eciton.net>
On Wed, 26 Feb 2014, Leif Lindholm wrote:
> > > no FDT. In this case, the VM implementation must provide ACPI, and
> > > the OS must be able to locate the ACPI root pointer through the UEFI
> > > system table.
> > >
> > > For more information about the arm and arm64 boot conventions, see
> > > Documentation/arm/Booting and Documentation/arm64/booting.txt in the
> > > Linux kernel source tree.
> > >
> > > For more information about UEFI and ACPI booting, see [4] and [5].
> >
> > What's the point of having ACPI in a virtual machine? You wouldn't
> > need to abstract any of the hardware in AML since you already know
> > what the virtual hardware is, so I can't see how this would help
> > anyone.
>
> The point is that if we need to share any real hw then we need to use
> whatever the host has.
That's right.
I dislike ACPI as much as the next guy, but unfortunately if the host
only supports ACPI, the Linux driver for a particular device only works
together with ACPI, and you want to assign that device to a VM, then we
might be forced to use ACPI to describe it.
WARNING: multiple messages have this Message-ID (diff)
From: stefano.stabellini@eu.citrix.com (Stefano Stabellini)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC] ARM VM System Sepcification
Date: Thu, 27 Feb 2014 12:31:55 +0000 [thread overview]
Message-ID: <alpine.DEB.2.02.1402271229370.31489@kaball.uk.xensource.com> (raw)
In-Reply-To: <20140226214843.GD12169@bivouac.eciton.net>
On Wed, 26 Feb 2014, Leif Lindholm wrote:
> > > no FDT. In this case, the VM implementation must provide ACPI, and
> > > the OS must be able to locate the ACPI root pointer through the UEFI
> > > system table.
> > >
> > > For more information about the arm and arm64 boot conventions, see
> > > Documentation/arm/Booting and Documentation/arm64/booting.txt in the
> > > Linux kernel source tree.
> > >
> > > For more information about UEFI and ACPI booting, see [4] and [5].
> >
> > What's the point of having ACPI in a virtual machine? You wouldn't
> > need to abstract any of the hardware in AML since you already know
> > what the virtual hardware is, so I can't see how this would help
> > anyone.
>
> The point is that if we need to share any real hw then we need to use
> whatever the host has.
That's right.
I dislike ACPI as much as the next guy, but unfortunately if the host
only supports ACPI, the Linux driver for a particular device only works
together with ACPI, and you want to assign that device to a VM, then we
might be forced to use ACPI to describe it.
next prev parent reply other threads:[~2014-02-27 12:32 UTC|newest]
Thread overview: 222+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-26 18:34 [RFC] ARM VM System Sepcification Christoffer Dall
2014-02-26 18:34 ` Christoffer Dall
2014-02-26 19:27 ` Christopher Covington
2014-02-26 19:27 ` Christopher Covington
2014-02-26 19:51 ` Christoffer Dall
2014-02-26 19:51 ` Christoffer Dall
2014-02-26 19:51 ` Christoffer Dall
2014-02-27 13:12 ` Christopher Covington
2014-02-27 13:12 ` Christopher Covington
2014-02-27 13:12 ` Christopher Covington
2014-02-27 16:02 ` Christoffer Dall
2014-02-27 16:02 ` Christoffer Dall
2014-02-27 16:02 ` Christoffer Dall
2014-03-01 15:41 ` Grant Likely
2014-03-01 15:41 ` Grant Likely
2014-02-26 19:27 ` Christopher Covington
2014-02-26 19:55 ` Arnd Bergmann
2014-02-26 19:55 ` Arnd Bergmann
2014-02-26 20:05 ` Christoffer Dall
2014-02-26 20:05 ` Christoffer Dall
2014-02-26 20:22 ` Arnd Bergmann
2014-02-26 20:22 ` Arnd Bergmann
[not found] ` < CABGGisxHOVqLcG7hVAuAzdeic41KWSLLBSjQLSJQcjTXLhNCow@mail.gmail.com>
2014-02-26 21:56 ` Rob Herring
2014-02-26 21:56 ` Rob Herring
2014-02-26 21:56 ` Rob Herring
2014-02-26 22:21 ` Christoffer Dall
2014-02-26 22:21 ` Christoffer Dall
2014-02-26 22:21 ` Christoffer Dall
2014-02-27 7:30 ` Arnd Bergmann
2014-02-27 7:30 ` Arnd Bergmann
2014-02-27 7:30 ` Arnd Bergmann
2014-02-27 10:05 ` Paolo Bonzini
2014-02-27 10:05 ` Paolo Bonzini
2014-02-27 10:05 ` Paolo Bonzini
2014-03-01 19:12 ` Grant Likely
2014-03-01 19:12 ` Grant Likely
2014-03-01 19:12 ` Grant Likely
2014-02-26 20:22 ` Arnd Bergmann
2014-02-27 9:35 ` Catalin Marinas
2014-02-27 9:35 ` Catalin Marinas
2014-02-27 9:35 ` Catalin Marinas
2014-02-26 20:05 ` Christoffer Dall
2014-02-26 20:19 ` Paolo Bonzini
2014-02-26 20:19 ` Paolo Bonzini
2014-02-26 20:19 ` Paolo Bonzini
2014-02-26 20:20 ` Peter Maydell
2014-02-26 20:20 ` Peter Maydell
2014-02-26 20:20 ` Peter Maydell
2014-02-26 21:48 ` Leif Lindholm
2014-02-26 21:48 ` Leif Lindholm
2014-02-26 22:25 ` Christoffer Dall
2014-02-26 22:25 ` Christoffer Dall
2014-03-01 19:20 ` Grant Likely
2014-03-01 19:20 ` Grant Likely
2014-03-01 19:20 ` Grant Likely
2014-02-26 22:25 ` Christoffer Dall
2014-02-27 12:31 ` Stefano Stabellini [this message]
2014-02-27 12:31 ` Stefano Stabellini
2014-02-27 14:00 ` Arnd Bergmann
2014-02-27 14:00 ` Arnd Bergmann
2014-02-27 14:24 ` Alexander Graf
2014-02-27 14:24 ` Alexander Graf
2014-02-27 19:56 ` Arnd Bergmann
2014-02-27 19:56 ` Arnd Bergmann
2014-02-27 19:56 ` Arnd Bergmann
2014-02-28 0:05 ` Alexander Graf
2014-02-28 0:05 ` Alexander Graf
2014-02-28 0:05 ` Alexander Graf
2014-02-28 10:01 ` Arnd Bergmann
[not found] ` <CB7DBE07-42BD-4588-AC9E-CB0BF95A811A-l3A5Bk7waGM@public.gmane.org>
2014-02-28 10:01 ` Arnd Bergmann
2014-02-28 10:01 ` Arnd Bergmann
2014-02-28 13:38 ` Riku Voipio
2014-02-28 13:38 ` Riku Voipio
2014-02-28 14:44 ` Stefano Stabellini
2014-02-28 14:44 ` Stefano Stabellini
2014-02-28 14:44 ` Stefano Stabellini
2014-02-27 14:24 ` Alexander Graf
2014-03-01 19:25 ` Grant Likely
2014-03-01 19:25 ` Grant Likely
2014-03-01 19:25 ` Grant Likely
2014-02-27 14:00 ` Arnd Bergmann
2014-02-27 12:31 ` Stefano Stabellini
2014-02-26 21:48 ` Leif Lindholm
2014-02-26 22:49 ` Rob Herring
2014-02-26 22:49 ` Rob Herring
2014-02-26 22:54 ` Peter Maydell
2014-02-26 22:54 ` Peter Maydell
2014-02-26 23:08 ` Rob Herring
2014-02-26 23:08 ` Rob Herring
2014-02-26 23:08 ` Rob Herring
2014-02-26 23:14 ` Peter Maydell
2014-02-26 23:14 ` Peter Maydell
2014-02-27 4:06 ` Nicolas Pitre
2014-02-27 4:06 ` Nicolas Pitre
2014-02-27 4:06 ` Nicolas Pitre
2014-02-26 23:14 ` Peter Maydell
2014-02-27 11:36 ` Robie Basak
2014-02-27 11:36 ` Robie Basak
2014-02-27 11:36 ` Robie Basak
2014-02-26 22:54 ` Peter Maydell
2014-02-26 23:13 ` Christopher Covington
2014-02-26 23:13 ` Christopher Covington
2014-02-26 23:13 ` Christopher Covington
2014-02-26 22:49 ` Rob Herring
2014-02-26 19:55 ` Arnd Bergmann
2014-02-26 21:05 ` Michael Hudson-Doyle
2014-02-26 21:05 ` Michael Hudson-Doyle
2014-02-26 21:05 ` Michael Hudson-Doyle
2014-02-26 21:08 ` Christoffer Dall
2014-02-26 21:08 ` Christoffer Dall
2014-02-26 21:08 ` Christoffer Dall
2014-02-26 22:35 ` Grant Likely
2014-02-26 22:47 ` Christoffer Dall
2014-02-26 22:47 ` Christoffer Dall
2014-02-26 22:47 ` Christoffer Dall
2014-02-27 12:27 ` Stefano Stabellini
2014-02-27 12:27 ` Stefano Stabellini
2014-02-27 12:27 ` Stefano Stabellini
2014-03-01 19:54 ` Grant Likely
2014-02-27 12:55 ` Peter Maydell
2014-02-27 12:55 ` Peter Maydell
2014-02-27 12:55 ` Peter Maydell
2014-02-26 22:35 ` Grant Likely
2014-02-27 0:41 ` Blibbet
2014-02-27 0:41 ` Blibbet
2014-02-27 0:41 ` Blibbet
[not found] ` <20140226134251.0436294e@anubis.ausil.us>
[not found] ` <CAMJs5B9bCs8Oz2Zg4UK--A3H4AaZRPMwy7SpxYom-1--_=qhBQ@mail.gmail.com>
[not found] ` <20140226151536.58154704@anubis.ausil.us>
2014-02-27 17:34 ` Grant Likely
2014-02-27 17:34 ` Grant Likely
2014-02-27 17:34 ` Grant Likely
2014-03-01 15:27 ` Grant Likely
2014-03-01 15:27 ` Grant Likely
2014-03-03 1:13 ` Christoffer Dall
2014-03-03 1:13 ` Christoffer Dall
2014-03-03 1:13 ` Christoffer Dall
2014-03-06 8:52 ` Robie Basak
2014-03-06 8:52 ` Robie Basak
2014-03-06 8:52 ` Robie Basak
2014-03-06 9:46 ` Paolo Bonzini
2014-03-06 9:46 ` Paolo Bonzini
2014-03-06 11:44 ` Laszlo Ersek
2014-03-06 11:44 ` Laszlo Ersek
2014-03-06 11:44 ` Laszlo Ersek
2014-03-06 12:04 ` Robie Basak
2014-03-06 12:04 ` Robie Basak
2014-03-06 12:10 ` Paolo Bonzini
2014-03-06 12:10 ` Paolo Bonzini
2014-03-06 12:10 ` Paolo Bonzini
2014-03-07 12:24 ` Grant Likely
2014-03-06 12:04 ` Robie Basak
[not found] ` <20140306120449.GA29916@ mal.justgohome.co.uk>
[not found] ` <20140306120449.GA29916-TaX3GuEuUBUVRcMIguc0yNBc4/FLrbF6@public.gmane.org>
2014-03-07 12:24 ` Grant Likely
2014-03-07 12:24 ` Grant Likely
[not found] ` < 20140322010206.GF25519@cbox>
2014-03-22 2:29 ` Christoffer Dall
2014-03-22 2:29 ` Christoffer Dall
2014-03-22 2:29 ` Christoffer Dall
2014-03-22 8:08 ` Paolo Bonzini
2014-03-22 8:08 ` Paolo Bonzini
2014-03-22 8:08 ` Paolo Bonzini
2014-03-23 3:19 ` Christoffer Dall
2014-03-23 3:19 ` Christoffer Dall
2014-03-23 3:29 ` Christoffer Dall
2014-03-23 3:29 ` Christoffer Dall
2014-03-23 3:29 ` Christoffer Dall
2014-03-24 9:57 ` Robie Basak
2014-03-24 9:57 ` Robie Basak
2014-03-24 10:46 ` Paolo Bonzini
2014-03-24 10:46 ` Paolo Bonzini
2014-03-24 10:46 ` Paolo Bonzini
2014-03-24 9:57 ` Robie Basak
2014-03-23 3:19 ` Christoffer Dall
2014-03-22 12:23 ` Grant Likely
2014-03-22 12:23 ` Grant Likely
2014-03-22 19:57 ` Paolo Bonzini
2014-03-22 19:57 ` Paolo Bonzini
2014-03-22 22:35 ` Grant Likely
2014-03-22 22:35 ` Grant Likely
2014-03-22 22:35 ` Grant Likely
2014-03-22 23:38 ` Michael Casadevall
2014-03-22 23:38 ` Michael Casadevall
2014-03-22 23:38 ` Michael Casadevall
2014-03-23 0:33 ` Laszlo Ersek
2014-03-23 0:33 ` Laszlo Ersek
2014-03-23 0:33 ` Laszlo Ersek
2014-03-22 19:57 ` Paolo Bonzini
2014-03-23 3:23 ` Christoffer Dall
2014-03-23 3:23 ` Christoffer Dall
2014-03-23 3:23 ` Christoffer Dall
2014-03-24 9:03 ` Ian Campbell
2014-03-24 9:03 ` Ian Campbell
2014-03-24 9:03 ` Ian Campbell
2014-03-24 10:41 ` Paolo Bonzini
2014-03-24 10:41 ` Paolo Bonzini
2014-03-24 10:41 ` Paolo Bonzini
2014-03-24 10:47 ` Ian Campbell
2014-03-24 10:47 ` Ian Campbell
2014-03-24 10:47 ` Ian Campbell
2014-03-24 12:13 ` Grant Likely
2014-03-24 12:13 ` Grant Likely
2014-03-24 12:13 ` Grant Likely
2014-03-24 12:16 ` Ian Campbell
2014-03-24 12:16 ` Ian Campbell
2014-03-24 12:16 ` Ian Campbell
2014-03-22 12:23 ` Grant Likely
2014-03-07 12:19 ` Grant Likely
2014-03-08 11:41 ` Michael Casadevall
2014-03-08 11:41 ` Michael Casadevall
2014-03-08 20:41 ` Laszlo Ersek
2014-03-08 20:41 ` Laszlo Ersek
2014-03-08 20:41 ` Laszlo Ersek
2014-03-08 11:41 ` Michael Casadevall
2014-03-06 9:46 ` Paolo Bonzini
2014-03-07 12:09 ` Grant Likely
2014-03-07 12:09 ` Grant Likely
2014-03-07 12:09 ` Grant Likely
[not found] ` <531843EE. 8040102@redhat.com>
[not found] ` <531843EE.8040102-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-03-07 12:19 ` Grant Likely
2014-03-07 12:19 ` Grant Likely
2014-03-01 15:27 ` Grant Likely
[not found] ` < CACxGe6tjuytsYAn6Hadf0AK+REzHgRydgbHPafL8+Sdtd_tMUA@mail.gmail.com>
[not found] ` <alpine .DEB.2.02.1402271216040.31489@kaball.uk.xensource.com>
[not found] ` <alpine.DEB.2.02.1402271216040.31489-7Z66fg9igcxYtxbxJUhB2Dgeux46jI+i@public.gmane.org>
2014-03-01 19:54 ` Grant Likely
2014-03-01 19:54 ` Grant Likely
2014-03-02 9:29 ` Peter Maydell
2014-03-02 9:29 ` Peter Maydell
2014-03-02 9:29 ` Peter Maydell
-- strict thread matches above, loose matches on Subject: below --
2014-02-26 18:34 Christoffer Dall
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