From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Cc: arnd-r2nGTMty4D4@public.gmane.org,
drjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
marc.zyngier-5wv7dgnIgG8@public.gmane.org,
benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org,
punit.agrawal-5wv7dgnIgG8@public.gmane.org,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
pranav.sawargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
jcm-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
dwmw-vV1OtcyAfmbQXOPxS62xeg@public.gmane.org,
Christoffer Dall
<christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: Summary of LPC guest MSI discussion in Santa Fe
Date: Thu, 10 Nov 2016 16:18:48 +0100 [thread overview]
Message-ID: <20161110151848.GE2078@8bytes.org> (raw)
In-Reply-To: <e59e9a17-e943-a227-5ea4-d028232155a8-5wv7dgnIgG8@public.gmane.org>
On Wed, Nov 09, 2016 at 08:11:16PM +0000, Robin Murphy wrote:
> When we *are* in full control of the IOVA space, we just carve out what
> we can find as best we can - see iova_reserve_pci_windows() in
> dma-iommu.c, which isn't really all that different to what x86 does
> (e.g. init_reserved_iova_ranges() in amd-iommu.c).
Yeah, that code was actually written with a look at what the Intel
driver does. I don't really like that it goes over all resources and
reserves them individually (not only because it is not hotplug-safe).
I have to check whether there is a nice and generic way to find out the
root-bridge windows and just reserve them in the iova-space. That would
be easier and more reliable.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: joro@8bytes.org (Joerg Roedel)
To: linux-arm-kernel@lists.infradead.org
Subject: Summary of LPC guest MSI discussion in Santa Fe
Date: Thu, 10 Nov 2016 16:18:48 +0100 [thread overview]
Message-ID: <20161110151848.GE2078@8bytes.org> (raw)
In-Reply-To: <e59e9a17-e943-a227-5ea4-d028232155a8@arm.com>
On Wed, Nov 09, 2016 at 08:11:16PM +0000, Robin Murphy wrote:
> When we *are* in full control of the IOVA space, we just carve out what
> we can find as best we can - see iova_reserve_pci_windows() in
> dma-iommu.c, which isn't really all that different to what x86 does
> (e.g. init_reserved_iova_ranges() in amd-iommu.c).
Yeah, that code was actually written with a look at what the Intel
driver does. I don't really like that it goes over all resources and
reserves them individually (not only because it is not hotplug-safe).
I have to check whether there is a nice and generic way to find out the
root-bridge windows and just reserve them in the iova-space. That would
be easier and more reliable.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Don Dutile <ddutile@redhat.com>,
Will Deacon <will.deacon@arm.com>,
Alex Williamson <alex.williamson@redhat.com>,
Christoffer Dall <christoffer.dall@linaro.org>,
Eric Auger <eric.auger@redhat.com>,
eric.auger.pro@gmail.com, marc.zyngier@arm.com,
tglx@linutronix.de, jason@lakedaemon.net,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
drjones@redhat.com, linux-kernel@vger.kernel.org,
pranav.sawargaonkar@gmail.com, iommu@lists.linux-foundation.org,
punit.agrawal@arm.com, diana.craciun@nxp.com,
benh@kernel.crashing.org, arnd@arndb.de, jcm@redhat.com,
dwmw@amazon.co.uk
Subject: Re: Summary of LPC guest MSI discussion in Santa Fe
Date: Thu, 10 Nov 2016 16:18:48 +0100 [thread overview]
Message-ID: <20161110151848.GE2078@8bytes.org> (raw)
In-Reply-To: <e59e9a17-e943-a227-5ea4-d028232155a8@arm.com>
On Wed, Nov 09, 2016 at 08:11:16PM +0000, Robin Murphy wrote:
> When we *are* in full control of the IOVA space, we just carve out what
> we can find as best we can - see iova_reserve_pci_windows() in
> dma-iommu.c, which isn't really all that different to what x86 does
> (e.g. init_reserved_iova_ranges() in amd-iommu.c).
Yeah, that code was actually written with a look at what the Intel
driver does. I don't really like that it goes over all resources and
reserves them individually (not only because it is not hotplug-safe).
I have to check whether there is a nice and generic way to find out the
root-bridge windows and just reserve them in the iova-space. That would
be easier and more reliable.
Joerg
next prev parent reply other threads:[~2016-11-10 15:18 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-03 21:39 [RFC 0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II) Eric Auger
2016-11-03 21:39 ` Eric Auger
2016-11-03 21:39 ` Eric Auger
[not found] ` <1478209178-3009-1-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-03 21:39 ` [RFC 1/8] vfio: fix vfio_info_cap_add/shift Eric Auger
2016-11-03 21:39 ` Eric Auger
2016-11-03 21:39 ` [RFC 2/8] iommu/iova: fix __alloc_and_insert_iova_range Eric Auger
2016-11-03 21:39 ` Eric Auger
2016-11-03 21:39 ` [RFC 3/8] iommu/dma: Allow MSI-only cookies Eric Auger
2016-11-03 21:39 ` Eric Auger
2016-11-03 21:39 ` [RFC 5/8] vfio/type1: Introduce RESV_IOVA_RANGE capability Eric Auger
2016-11-03 21:39 ` Eric Auger
2016-11-03 21:39 ` [RFC 8/8] iommu/arm-smmu: implement add_reserved_regions callback Eric Auger
2016-11-03 21:39 ` Eric Auger
2016-11-04 4:02 ` [RFC 0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II) Alex Williamson
2016-11-04 4:02 ` Alex Williamson
2016-11-04 4:02 ` Alex Williamson
2016-11-08 2:45 ` Summary of LPC guest MSI discussion in Santa Fe (was: Re: [RFC 0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II)) Will Deacon
2016-11-08 2:45 ` Will Deacon
2016-11-08 14:27 ` Summary of LPC guest MSI discussion in Santa Fe Auger Eric
2016-11-08 14:27 ` Auger Eric
[not found] ` <dae12190-1eb6-20a9-5740-9e5be8bb65fc-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-08 17:54 ` Will Deacon
2016-11-08 17:54 ` Will Deacon
2016-11-08 17:54 ` Will Deacon
[not found] ` <20161108175457.GK20591-5wv7dgnIgG8@public.gmane.org>
2016-11-08 19:02 ` Don Dutile
2016-11-08 19:02 ` Don Dutile
2016-11-08 19:02 ` Don Dutile
2016-11-08 19:10 ` Will Deacon
2016-11-08 19:10 ` Will Deacon
[not found] ` <5822214F.2070500-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-09 7:43 ` Auger Eric
2016-11-09 7:43 ` Auger Eric
2016-11-09 7:43 ` Auger Eric
2016-11-08 16:02 ` Don Dutile
2016-11-08 16:02 ` Don Dutile
[not found] ` <20161108024559.GA20591-5wv7dgnIgG8@public.gmane.org>
2016-11-08 20:29 ` Summary of LPC guest MSI discussion in Santa Fe (was: Re: [RFC 0/8] KVM PCIe/MSI passthrough on ARM/ARM64 (Alt II)) Christoffer Dall
2016-11-08 20:29 ` Christoffer Dall
2016-11-08 20:29 ` Christoffer Dall
2016-11-08 23:35 ` Alex Williamson
2016-11-08 23:35 ` Alex Williamson
2016-11-08 23:35 ` Alex Williamson
[not found] ` <20161108163508.1bcae0c2-1yVPhWWZRC1BDLzU/O5InQ@public.gmane.org>
2016-11-09 2:52 ` Summary of LPC guest MSI discussion in Santa Fe Don Dutile
2016-11-09 2:52 ` Don Dutile
2016-11-09 2:52 ` Don Dutile
[not found] ` <58228F71.6020108-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-09 17:03 ` Will Deacon
2016-11-09 17:03 ` Will Deacon
2016-11-09 17:03 ` Will Deacon
2016-11-09 18:59 ` Don Dutile
2016-11-09 18:59 ` Don Dutile
[not found] ` <582371FB.2040808-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-09 19:23 ` Christoffer Dall
2016-11-09 19:23 ` Christoffer Dall
2016-11-09 19:23 ` Christoffer Dall
2016-11-09 20:01 ` Alex Williamson
2016-11-09 20:01 ` Alex Williamson
2016-11-09 20:01 ` Alex Williamson
2016-11-10 14:40 ` Joerg Roedel
2016-11-10 14:40 ` Joerg Roedel
[not found] ` <20161110144007.GC2078-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-11-10 17:07 ` Alex Williamson
2016-11-10 17:07 ` Alex Williamson
2016-11-10 17:07 ` Alex Williamson
2016-11-09 20:31 ` Will Deacon
2016-11-09 20:31 ` Will Deacon
[not found] ` <20161109203145.GO17771-5wv7dgnIgG8@public.gmane.org>
2016-11-09 22:17 ` Alex Williamson
2016-11-09 22:17 ` Alex Williamson
2016-11-09 22:17 ` Alex Williamson
[not found] ` <20161109151709.74927f83-1yVPhWWZRC1BDLzU/O5InQ@public.gmane.org>
2016-11-09 22:25 ` Will Deacon
2016-11-09 22:25 ` Will Deacon
2016-11-09 22:25 ` Will Deacon
[not found] ` <20161109222522.GS17771-5wv7dgnIgG8@public.gmane.org>
2016-11-09 23:24 ` Alex Williamson
2016-11-09 23:24 ` Alex Williamson
2016-11-09 23:24 ` Alex Williamson
2016-11-09 23:38 ` Will Deacon
2016-11-09 23:38 ` Will Deacon
[not found] ` <20161109233847.GT17771-5wv7dgnIgG8@public.gmane.org>
2016-11-09 23:59 ` Alex Williamson
2016-11-09 23:59 ` Alex Williamson
2016-11-09 23:59 ` Alex Williamson
2016-11-10 0:14 ` Auger Eric
2016-11-10 0:14 ` Auger Eric
[not found] ` <83b6440a-31eb-c1b4-642c-a4c311f37ef2-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-10 0:55 ` Alex Williamson
2016-11-10 0:55 ` Alex Williamson
2016-11-10 0:55 ` Alex Williamson
2016-11-10 2:01 ` Will Deacon
2016-11-10 2:01 ` Will Deacon
[not found] ` <20161110020130.GA19108-5wv7dgnIgG8@public.gmane.org>
2016-11-10 11:14 ` Auger Eric
2016-11-10 11:14 ` Auger Eric
2016-11-10 11:14 ` Auger Eric
[not found] ` <ddd8af9d-ad8f-78d8-3048-3d640b74470e-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-10 17:46 ` Alex Williamson
2016-11-10 17:46 ` Alex Williamson
2016-11-10 17:46 ` Alex Williamson
2016-11-11 11:19 ` Joerg Roedel
2016-11-11 11:19 ` Joerg Roedel
[not found] ` <20161111111944.GO2078-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-11-11 15:50 ` Alex Williamson
2016-11-11 15:50 ` Alex Williamson
2016-11-11 15:50 ` Alex Williamson
[not found] ` <20161111085056.4cf8989d-1yVPhWWZRC1BDLzU/O5InQ@public.gmane.org>
2016-11-11 16:05 ` Alex Williamson
2016-11-11 16:05 ` Alex Williamson
2016-11-11 16:05 ` Alex Williamson
2016-11-14 15:19 ` Joerg Roedel
2016-11-14 15:19 ` Joerg Roedel
2016-11-11 16:25 ` Don Dutile
2016-11-11 16:25 ` Don Dutile
2016-11-11 16:25 ` Don Dutile
2016-11-11 16:00 ` Don Dutile
2016-11-11 16:00 ` Don Dutile
2016-11-11 16:00 ` Don Dutile
2016-11-10 14:52 ` Joerg Roedel
2016-11-10 14:52 ` Joerg Roedel
2016-11-09 20:11 ` Robin Murphy
2016-11-09 20:11 ` Robin Murphy
[not found] ` <e59e9a17-e943-a227-5ea4-d028232155a8-5wv7dgnIgG8@public.gmane.org>
2016-11-10 15:18 ` Joerg Roedel [this message]
2016-11-10 15:18 ` Joerg Roedel
2016-11-10 15:18 ` Joerg Roedel
2016-11-21 5:13 ` Jon Masters
2016-11-21 5:13 ` Jon Masters
2016-11-21 5:13 ` Jon Masters
[not found] ` <83d7bf8e-1aa9-b61b-4e83-ba9da1926d19-Zp4isUonpHBD60Wz+7aTrA@public.gmane.org>
2016-11-23 20:12 ` Don Dutile
2016-11-23 20:12 ` Don Dutile
2016-11-23 20:12 ` Don Dutile
2016-11-03 21:39 ` [RFC 4/8] iommu: Add a list of iommu_reserved_region in iommu_domain Eric Auger
2016-11-03 21:39 ` [RFC 6/8] iommu: Handle the list of reserved regions Eric Auger
2016-11-03 21:39 ` [RFC 7/8] iommu/vt-d: Implement add_reserved_regions callback Eric Auger
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