From: David Gibson <david@gibson.dropbear.id.au>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Alex Williamson <alex.williamson@redhat.com>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
Alexander Graf <agraf@suse.de>,
linuxppc-dev@lists.ozlabs.org, Paul Mackerras <paulus@samba.org>,
"kvm@vger.kernel.org mailing list" <kvm@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
kvm-ppc@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>,
Joerg Roedel <joro@8bytes.org>
Subject: Re: [PATCH 3/4] KVM: PPC: Add support for IOMMU in-kernel handling
Date: Mon, 24 Jun 2013 13:54:26 +1000 [thread overview]
Message-ID: <20130624035426.GE25265@voom.fritz.box> (raw)
In-Reply-To: <1371943693.3944.104.camel@pasglop>
[-- Attachment #1: Type: text/plain, Size: 1457 bytes --]
On Sun, Jun 23, 2013 at 09:28:13AM +1000, Benjamin Herrenschmidt wrote:
> On Sat, 2013-06-22 at 22:03 +1000, David Gibson wrote:
> > I think the interface should not take the group fd, but the container
> > fd. Holding a reference to *that* would keep the necessary things
> > around. But more to the point, it's the right thing semantically:
> >
> > The container is essentially the handle on a host iommu address space,
> > and so that's what should be bound by the KVM call to a particular
> > guest iommu address space. e.g. it would make no sense to bind two
> > different groups to different guest iommu address spaces, if they were
> > in the same container - the guest thinks they are different spaces,
> > but if they're in the same container they must be the same space.
>
> Interestingly, how are we going to extend that when/if we implement
> DDW ?
>
> DDW means an API by which the guest can request the creation of
> additional iommus for a given device (typically, in addition to the
> default smallish 32-bit one using 4k pages, the guest can request
> a larger window in 64-bit space using a larger page size).
So, would a PAPR gest requesting this expect the new window to have
a new liobn, or an existing liobn?
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
[-- Attachment #2: Type: application/pgp-signature, Size: 198 bytes --]
next prev parent reply other threads:[~2013-06-24 3:54 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-05 6:11 [PATCH 0/4 v3] KVM: PPC: IOMMU in-kernel handling Alexey Kardashevskiy
2013-06-05 6:11 ` [PATCH 1/4] KVM: PPC: Add support for multiple-TCE hcalls Alexey Kardashevskiy
2013-06-16 4:20 ` Benjamin Herrenschmidt
2013-06-16 22:06 ` Alexander Graf
2013-06-17 7:55 ` Alexey Kardashevskiy
2013-06-17 8:02 ` Alexander Graf
2013-06-17 8:34 ` Alexey Kardashevskiy
2013-06-17 8:40 ` Alexander Graf
2013-06-17 8:51 ` Alexey Kardashevskiy
2013-06-17 10:46 ` Alexander Graf
2013-06-17 10:48 ` Alexander Graf
2013-06-17 8:37 ` Benjamin Herrenschmidt
2013-06-17 8:42 ` Alexander Graf
2013-06-05 6:11 ` [PATCH 2/4] powerpc: Prepare to support kernel handling of IOMMU map/unmap Alexey Kardashevskiy
2013-06-16 4:26 ` Benjamin Herrenschmidt
2013-06-16 4:31 ` Benjamin Herrenschmidt
2013-06-17 9:17 ` Alexey Kardashevskiy
2013-06-05 6:11 ` [PATCH 3/4] KVM: PPC: Add support for IOMMU in-kernel handling Alexey Kardashevskiy
2013-06-16 4:39 ` Benjamin Herrenschmidt
2013-06-19 3:17 ` Alexey Kardashevskiy
2013-06-16 22:25 ` Alexander Graf
2013-06-16 22:39 ` Benjamin Herrenschmidt
2013-06-17 3:13 ` Alex Williamson
2013-06-17 3:56 ` Benjamin Herrenschmidt
2013-06-18 2:32 ` Alex Williamson
2013-06-18 4:38 ` Benjamin Herrenschmidt
2013-06-18 14:48 ` Alex Williamson
2013-06-18 21:58 ` Benjamin Herrenschmidt
2013-06-19 3:35 ` Rusty Russell
2013-06-19 4:59 ` Benjamin Herrenschmidt
2013-06-19 9:58 ` Alexander Graf
2013-06-19 14:50 ` Benjamin Herrenschmidt
2013-06-19 15:49 ` Alex Williamson
2013-06-20 4:58 ` Alexey Kardashevskiy
2013-06-20 5:28 ` David Gibson
2013-06-20 7:47 ` Benjamin Herrenschmidt
2013-06-20 8:48 ` Alexey Kardashevskiy
2013-06-20 14:55 ` Alex Williamson
2013-06-22 8:25 ` Alexey Kardashevskiy
2013-06-22 12:03 ` David Gibson
2013-06-22 14:28 ` Alex Williamson
2013-06-24 3:52 ` David Gibson
2013-06-24 4:41 ` Alex Williamson
2013-06-27 11:01 ` David Gibson
2013-06-22 23:28 ` Benjamin Herrenschmidt
2013-06-24 3:54 ` David Gibson [this message]
2013-06-24 3:58 ` Benjamin Herrenschmidt
2013-06-05 6:11 ` [PATCH 4/4] KVM: PPC: Add hugepage " Alexey Kardashevskiy
2013-06-16 4:46 ` Benjamin Herrenschmidt
2013-06-17 16:35 ` Paolo Bonzini
2013-06-12 3:14 ` [PATCH 0/4 v3] KVM: PPC: " Benjamin Herrenschmidt
-- strict thread matches above, loose matches on Subject: below --
2013-05-21 3:06 [PATCH 0/4 v2] " Alexey Kardashevskiy
2013-05-21 3:06 ` [PATCH 3/4] KVM: PPC: Add support for " Alexey Kardashevskiy
2013-05-22 21:06 ` Scott Wood
2013-05-25 2:45 ` David Gibson
2013-05-27 2:44 ` Alexey Kardashevskiy
2013-05-28 17:45 ` Scott Wood
2013-05-28 23:30 ` Alexey Kardashevskiy
2013-05-28 23:35 ` Scott Wood
2013-05-29 0:12 ` Alexey Kardashevskiy
2013-05-29 20:05 ` Scott Wood
2013-05-29 23:10 ` Alexey Kardashevskiy
2013-05-29 23:14 ` Scott Wood
2013-05-29 23:29 ` Alexey Kardashevskiy
2013-05-29 23:32 ` Scott Wood
2013-05-27 10:23 ` Paolo Bonzini
2013-05-27 14:26 ` Alexey Kardashevskiy
2013-05-27 14:41 ` Paolo Bonzini
2013-05-28 16:32 ` Scott Wood
2013-05-29 0:20 ` Alexey Kardashevskiy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130624035426.GE25265@voom.fritz.box \
--to=david@gibson.dropbear.id.au \
--cc=agraf@suse.de \
--cc=aik@ozlabs.ru \
--cc=alex.williamson@redhat.com \
--cc=benh@kernel.crashing.org \
--cc=joro@8bytes.org \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=paulus@samba.org \
--cc=rusty@rustcorp.com.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).