From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
Alex Williamson <alex.williamson@redhat.com>,
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: Thu, 20 Jun 2013 07:47:29 +0000 [thread overview]
Message-ID: <1371714449.3944.14.camel@pasglop> (raw)
In-Reply-To: <20130620052822.GB3140@voom.redhat.com>
On Thu, 2013-06-20 at 15:28 +1000, David Gibson wrote:
> > Just out of curiosity - would not get_file() and fput_atomic() on a
> group's
> > file* do the right job instead of vfio_group_add_external_user() and
> > vfio_group_del_external_user()?
>
> I was thinking that too. Grabbing a file reference would certainly be
> the usual way of handling this sort of thing.
But that wouldn't prevent the group ownership to be returned to
the kernel or another user would it ?
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: "kvm@vger.kernel.org mailing list" <kvm@vger.kernel.org>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
Joerg Roedel <joro@8bytes.org>,
Rusty Russell <rusty@rustcorp.com.au>,
Alexander Graf <agraf@suse.de>,
kvm-ppc@vger.kernel.org, open list <linux-kernel@vger.kernel.org>,
Alex Williamson <alex.williamson@redhat.com>,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 3/4] KVM: PPC: Add support for IOMMU in-kernel handling
Date: Thu, 20 Jun 2013 17:47:29 +1000 [thread overview]
Message-ID: <1371714449.3944.14.camel@pasglop> (raw)
In-Reply-To: <20130620052822.GB3140@voom.redhat.com>
On Thu, 2013-06-20 at 15:28 +1000, David Gibson wrote:
> > Just out of curiosity - would not get_file() and fput_atomic() on a
> group's
> > file* do the right job instead of vfio_group_add_external_user() and
> > vfio_group_del_external_user()?
>
> I was thinking that too. Grabbing a file reference would certainly be
> the usual way of handling this sort of thing.
But that wouldn't prevent the group ownership to be returned to
the kernel or another user would it ?
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
Alex Williamson <alex.williamson@redhat.com>,
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: Thu, 20 Jun 2013 17:47:29 +1000 [thread overview]
Message-ID: <1371714449.3944.14.camel@pasglop> (raw)
In-Reply-To: <20130620052822.GB3140@voom.redhat.com>
On Thu, 2013-06-20 at 15:28 +1000, David Gibson wrote:
> > Just out of curiosity - would not get_file() and fput_atomic() on a
> group's
> > file* do the right job instead of vfio_group_add_external_user() and
> > vfio_group_del_external_user()?
>
> I was thinking that too. Grabbing a file reference would certainly be
> the usual way of handling this sort of thing.
But that wouldn't prevent the group ownership to be returned to
the kernel or another user would it ?
Ben.
next prev parent reply other threads:[~2013-06-20 7:47 UTC|newest]
Thread overview: 212+ 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 ` Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-05 6:11 ` [PATCH 1/4] KVM: PPC: Add support for multiple-TCE hcalls Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-16 4:20 ` Benjamin Herrenschmidt
2013-06-16 4:20 ` Benjamin Herrenschmidt
2013-06-16 4:20 ` Benjamin Herrenschmidt
2013-06-16 22:06 ` Alexander Graf
2013-06-16 22:06 ` Alexander Graf
2013-06-16 22:06 ` Alexander Graf
2013-06-17 7:55 ` Alexey Kardashevskiy
2013-06-17 7:55 ` Alexey Kardashevskiy
2013-06-17 7:55 ` Alexey Kardashevskiy
2013-06-17 8:02 ` Alexander Graf
2013-06-17 8:02 ` Alexander Graf
2013-06-17 8:02 ` Alexander Graf
2013-06-17 8:34 ` Alexey Kardashevskiy
2013-06-17 8:34 ` Alexey Kardashevskiy
2013-06-17 8:34 ` Alexey Kardashevskiy
2013-06-17 8:40 ` Alexander Graf
2013-06-17 8:40 ` Alexander Graf
2013-06-17 8:40 ` Alexander Graf
2013-06-17 8:51 ` Alexey Kardashevskiy
2013-06-17 8:51 ` Alexey Kardashevskiy
2013-06-17 8:51 ` Alexey Kardashevskiy
2013-06-17 10:46 ` Alexander Graf
2013-06-17 10:46 ` Alexander Graf
2013-06-17 10:46 ` Alexander Graf
2013-06-17 10:48 ` Alexander Graf
2013-06-17 10:48 ` Alexander Graf
2013-06-17 10:48 ` Alexander Graf
2013-06-17 8:37 ` Benjamin Herrenschmidt
2013-06-17 8:37 ` Benjamin Herrenschmidt
2013-06-17 8:37 ` Benjamin Herrenschmidt
2013-06-17 8:42 ` Alexander Graf
2013-06-17 8:42 ` Alexander Graf
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
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-16 4:26 ` Benjamin Herrenschmidt
2013-06-16 4:26 ` Benjamin Herrenschmidt
2013-06-16 4:26 ` Benjamin Herrenschmidt
2013-06-16 4:26 ` Benjamin Herrenschmidt
2013-06-16 4:31 ` Benjamin Herrenschmidt
2013-06-16 4:31 ` Benjamin Herrenschmidt
2013-06-16 4:31 ` Benjamin Herrenschmidt
2013-06-16 4:31 ` Benjamin Herrenschmidt
2013-06-17 9:17 ` Alexey Kardashevskiy
2013-06-17 9:17 ` Alexey Kardashevskiy
2013-06-17 9:17 ` Alexey Kardashevskiy
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
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-16 4:39 ` Benjamin Herrenschmidt
2013-06-16 4:39 ` Benjamin Herrenschmidt
2013-06-16 4:39 ` Benjamin Herrenschmidt
2013-06-19 3:17 ` Alexey Kardashevskiy
2013-06-19 3:17 ` Alexey Kardashevskiy
2013-06-19 3:17 ` Alexey Kardashevskiy
2013-06-16 22:25 ` Alexander Graf
2013-06-16 22:25 ` Alexander Graf
2013-06-16 22:25 ` Alexander Graf
2013-06-16 22:39 ` Benjamin Herrenschmidt
2013-06-16 22:39 ` Benjamin Herrenschmidt
2013-06-16 22:39 ` Benjamin Herrenschmidt
2013-06-17 3:13 ` Alex Williamson
2013-06-17 3:13 ` Alex Williamson
2013-06-17 3:13 ` Alex Williamson
2013-06-17 3:56 ` Benjamin Herrenschmidt
2013-06-17 3:56 ` Benjamin Herrenschmidt
2013-06-17 3:56 ` Benjamin Herrenschmidt
2013-06-18 2:32 ` Alex Williamson
2013-06-18 2:32 ` Alex Williamson
2013-06-18 2:32 ` Alex Williamson
2013-06-18 4:38 ` Benjamin Herrenschmidt
2013-06-18 4:38 ` Benjamin Herrenschmidt
2013-06-18 4:38 ` Benjamin Herrenschmidt
2013-06-18 14:48 ` Alex Williamson
2013-06-18 14:48 ` Alex Williamson
2013-06-18 14:48 ` Alex Williamson
2013-06-18 21:58 ` Benjamin Herrenschmidt
2013-06-18 21:58 ` Benjamin Herrenschmidt
2013-06-18 21:58 ` Benjamin Herrenschmidt
2013-06-19 3:35 ` Rusty Russell
2013-06-19 3:47 ` Rusty Russell
2013-06-19 3:35 ` Rusty Russell
2013-06-19 4:59 ` Benjamin Herrenschmidt
2013-06-19 4:59 ` Benjamin Herrenschmidt
2013-06-19 4:59 ` Benjamin Herrenschmidt
2013-06-19 9:58 ` Alexander Graf
2013-06-19 9:58 ` Alexander Graf
2013-06-19 9:58 ` Alexander Graf
2013-06-19 14:50 ` Benjamin Herrenschmidt
2013-06-19 14:50 ` Benjamin Herrenschmidt
2013-06-19 14:50 ` Benjamin Herrenschmidt
2013-06-19 15:49 ` Alex Williamson
2013-06-19 15:49 ` Alex Williamson
2013-06-19 15:49 ` Alex Williamson
2013-06-20 4:58 ` Alexey Kardashevskiy
2013-06-20 4:58 ` Alexey Kardashevskiy
2013-06-20 4:58 ` Alexey Kardashevskiy
2013-06-20 5:28 ` David Gibson
2013-06-20 5:28 ` David Gibson
2013-06-20 5:28 ` David Gibson
2013-06-20 7:47 ` Benjamin Herrenschmidt [this message]
2013-06-20 7:47 ` Benjamin Herrenschmidt
2013-06-20 7:47 ` Benjamin Herrenschmidt
2013-06-20 8:48 ` Alexey Kardashevskiy
2013-06-20 8:48 ` Alexey Kardashevskiy
2013-06-20 8:48 ` Alexey Kardashevskiy
2013-06-20 14:55 ` Alex Williamson
2013-06-20 14:55 ` Alex Williamson
2013-06-20 14:55 ` Alex Williamson
2013-06-22 8:25 ` Alexey Kardashevskiy
2013-06-22 8:25 ` Alexey Kardashevskiy
2013-06-22 8:25 ` Alexey Kardashevskiy
2013-06-22 12:03 ` David Gibson
2013-06-22 12:03 ` David Gibson
2013-06-22 12:03 ` David Gibson
2013-06-22 14:28 ` Alex Williamson
2013-06-22 14:28 ` Alex Williamson
2013-06-22 14:28 ` Alex Williamson
2013-06-24 3:52 ` David Gibson
2013-06-24 3:52 ` David Gibson
2013-06-24 3:52 ` David Gibson
2013-06-24 3:52 ` David Gibson
2013-06-24 4:41 ` Alex Williamson
2013-06-24 4:41 ` Alex Williamson
2013-06-24 4:41 ` Alex Williamson
2013-06-27 11:01 ` David Gibson
2013-06-27 11:01 ` David Gibson
2013-06-27 11:01 ` David Gibson
2013-06-22 23:28 ` Benjamin Herrenschmidt
2013-06-22 23:28 ` Benjamin Herrenschmidt
2013-06-22 23:28 ` Benjamin Herrenschmidt
2013-06-24 3:54 ` David Gibson
2013-06-24 3:54 ` David Gibson
2013-06-24 3:54 ` David Gibson
2013-06-24 3:58 ` Benjamin Herrenschmidt
2013-06-24 3:58 ` Benjamin Herrenschmidt
2013-06-24 3:58 ` Benjamin Herrenschmidt
2013-06-05 6:11 ` [PATCH 4/4] KVM: PPC: Add hugepage " Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-05 6:11 ` Alexey Kardashevskiy
2013-06-16 4:46 ` Benjamin Herrenschmidt
2013-06-16 4:46 ` Benjamin Herrenschmidt
2013-06-16 4:46 ` Benjamin Herrenschmidt
2013-06-17 16:35 ` Paolo Bonzini
2013-06-17 16:35 ` Paolo Bonzini
2013-06-17 16:35 ` Paolo Bonzini
2013-06-12 3:14 ` [PATCH 0/4 v3] KVM: PPC: " Benjamin Herrenschmidt
2013-06-12 3:14 ` Benjamin Herrenschmidt
2013-06-12 3:14 ` 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
2013-05-21 3:06 ` Alexey Kardashevskiy
2013-05-21 3:06 ` Alexey Kardashevskiy
2013-05-22 21:06 ` Scott Wood
2013-05-22 21:06 ` Scott Wood
2013-05-22 21:06 ` Scott Wood
2013-05-25 2:45 ` David Gibson
2013-05-25 2:45 ` David Gibson
2013-05-25 2:45 ` David Gibson
2013-05-27 2:44 ` Alexey Kardashevskiy
2013-05-27 2:44 ` Alexey Kardashevskiy
2013-05-27 2:44 ` Alexey Kardashevskiy
2013-05-27 10:23 ` Paolo Bonzini
2013-05-27 10:23 ` Paolo Bonzini
2013-05-27 10:23 ` Paolo Bonzini
2013-05-27 14:26 ` Alexey Kardashevskiy
2013-05-27 14:26 ` Alexey Kardashevskiy
2013-05-27 14:26 ` Alexey Kardashevskiy
2013-05-27 14:41 ` Paolo Bonzini
2013-05-27 14:41 ` Paolo Bonzini
2013-05-27 14:41 ` Paolo Bonzini
2013-05-28 16:32 ` Scott Wood
2013-05-28 16:32 ` Scott Wood
2013-05-28 16:32 ` Scott Wood
2013-05-29 0:20 ` Alexey Kardashevskiy
2013-05-29 0:20 ` Alexey Kardashevskiy
2013-05-29 0:20 ` Alexey Kardashevskiy
2013-05-28 17:45 ` Scott Wood
2013-05-28 17:45 ` Scott Wood
2013-05-28 17:45 ` Scott Wood
2013-05-28 23:30 ` Alexey Kardashevskiy
2013-05-28 23:30 ` Alexey Kardashevskiy
2013-05-28 23:30 ` Alexey Kardashevskiy
2013-05-28 23:35 ` Scott Wood
2013-05-28 23:35 ` Scott Wood
2013-05-28 23:35 ` Scott Wood
2013-05-29 0:12 ` Alexey Kardashevskiy
2013-05-29 0:12 ` Alexey Kardashevskiy
2013-05-29 0:12 ` Alexey Kardashevskiy
2013-05-29 20:05 ` Scott Wood
2013-05-29 20:05 ` Scott Wood
2013-05-29 20:05 ` Scott Wood
2013-05-29 23:10 ` Alexey Kardashevskiy
2013-05-29 23:10 ` Alexey Kardashevskiy
2013-05-29 23:10 ` Alexey Kardashevskiy
2013-05-29 23:14 ` Scott Wood
2013-05-29 23:14 ` Scott Wood
2013-05-29 23:14 ` Scott Wood
2013-05-29 23:14 ` Scott Wood
2013-05-29 23:29 ` Alexey Kardashevskiy
2013-05-29 23:29 ` Alexey Kardashevskiy
2013-05-29 23:29 ` Alexey Kardashevskiy
2013-05-29 23:32 ` Scott Wood
2013-05-29 23:32 ` Scott Wood
2013-05-29 23:32 ` Scott Wood
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