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From: Eric Auger <eric.auger@redhat.com>
To: eric.auger@redhat.com, eric.auger.pro@gmail.com,
	christoffer.dall@linaro.org, marc.zyngier@arm.com,
	robin.murphy@arm.com, alex.williamson@redhat.com,
	will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de,
	jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org
Cc: 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
Subject: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions
Date: Tue, 15 Nov 2016 13:09:13 +0000	[thread overview]
Message-ID: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> (raw)

Following LPC discussions, we now report reserved regions through
iommu-group sysfs reserved_regions attribute file.

Reserved regions are populated through the IOMMU get_resv_region callback
(former get_dm_regions), now implemented by amd-iommu, intel-iommu and
arm-smmu.

The intel-iommu reports the [FEE0_0000h - FEF0_000h] MSI window as an
IOMMU_RESV_NOMAP reserved region.

arm-smmu reports the MSI window (arbitrarily located at 0x8000000 and
1MB large) and the PCI host bridge windows.

The series integrates a not officially posted patch from Robin:
"iommu/dma: Allow MSI-only cookies".

This series currently does not address IRQ safety assessment.

Best Regards

Eric

Git: complete series available at
https://github.com/eauger/linux/tree/v4.9-rc5-reserved-rfc-v3

History:
RFC v2 -> v3:
- switch to an iommu-group sysfs API
- use new dummy allocator provided by Robin
- dummy allocator initialized by vfio-iommu-type1 after enumerating
  the reserved regions
- at the moment ARM MSI base address/size is left unchanged compared
  to v2
- we currently report reserved regions and not usable IOVA regions as
  requested by Alex

RFC v1 -> v2:
- fix intel_add_reserved_regions
- add mutex lock/unlock in vfio_iommu_type1


Eric Auger (10):
  iommu/dma: Allow MSI-only cookies
  iommu: Rename iommu_dm_regions into iommu_resv_regions
  iommu: Add new reserved IOMMU attributes
  iommu: iommu_alloc_resv_region
  iommu: Do not map reserved regions
  iommu: iommu_get_group_resv_regions
  iommu: Implement reserved_regions iommu-group sysfs file
  iommu/vt-d: Implement reserved region get/put callbacks
  iommu/arm-smmu: Implement reserved region get/put callbacks
  vfio/type1: Get MSI cookie

 drivers/iommu/amd_iommu.c       |  20 +++---
 drivers/iommu/arm-smmu.c        |  52 +++++++++++++++
 drivers/iommu/dma-iommu.c       | 116 ++++++++++++++++++++++++++-------
 drivers/iommu/intel-iommu.c     |  50 ++++++++++----
 drivers/iommu/iommu.c           | 141 ++++++++++++++++++++++++++++++++++++----
 drivers/vfio/vfio_iommu_type1.c |  26 ++++++++
 include/linux/dma-iommu.h       |   7 ++
 include/linux/iommu.h           |  49 ++++++++++----
 8 files changed, 391 insertions(+), 70 deletions(-)

-- 
1.9.1

             reply	other threads:[~2016-11-15 13:09 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-15 13:09 Eric Auger [this message]
2016-11-15 13:09 ` [RFC v3 04/10] iommu: iommu_alloc_resv_region Eric Auger
     [not found]   ` <1479215363-2898-5-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-29 16:11     ` Joerg Roedel
     [not found]       ` <20161129161128.GI2078-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-11-30  9:41         ` Auger Eric
2016-12-06 17:30     ` Robin Murphy
     [not found] ` <1479215363-2898-1-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-15 13:09   ` [RFC v3 01/10] iommu/dma: Allow MSI-only cookies Eric Auger
2016-11-15 13:09   ` [RFC v3 02/10] iommu: Rename iommu_dm_regions into iommu_resv_regions Eric Auger
     [not found]     ` <1479215363-2898-3-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-06 17:30       ` Robin Murphy
2016-11-15 13:09   ` [RFC v3 03/10] iommu: Add new reserved IOMMU attributes Eric Auger
     [not found]     ` <1479215363-2898-4-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-06 17:28       ` Robin Murphy
2016-11-15 13:09   ` [RFC v3 05/10] iommu: Do not map reserved regions Eric Auger
     [not found]     ` <1479215363-2898-6-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-06 17:36       ` Robin Murphy
     [not found]         ` <fff44f65-d9a6-1e35-97cd-997b92d2fce3-5wv7dgnIgG8@public.gmane.org>
2016-12-07 15:15           ` Auger Eric
2016-11-15 13:09   ` [RFC v3 06/10] iommu: iommu_get_group_resv_regions Eric Auger
     [not found]     ` <1479215363-2898-7-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-06 18:13       ` Robin Murphy
     [not found]         ` <8eb9662b-d677-546c-feb8-32fe5bd624f2-5wv7dgnIgG8@public.gmane.org>
2016-12-07 15:13           ` Auger Eric
2016-11-15 13:09   ` [RFC v3 07/10] iommu: Implement reserved_regions iommu-group sysfs file Eric Auger
2016-11-15 13:09   ` [RFC v3 08/10] iommu/vt-d: Implement reserved region get/put callbacks Eric Auger
2016-11-15 13:09   ` [RFC v3 09/10] iommu/arm-smmu: " Eric Auger
     [not found]     ` <1479215363-2898-10-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-06 18:55       ` Robin Murphy
     [not found]         ` <02c0ce15-fa67-e65f-3a4e-f543cc9fd3b8-5wv7dgnIgG8@public.gmane.org>
2016-12-07 15:02           ` Auger Eric
     [not found]             ` <c11755b8-4fb3-3f2f-d0b2-e688a5f8a6b6-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-07 18:24               ` Robin Murphy
     [not found]                 ` <5de00158-c82d-6b47-cf64-d4ba0183868d-5wv7dgnIgG8@public.gmane.org>
2016-12-08  7:57                   ` Auger Eric
2016-11-15 13:09   ` [RFC v3 10/10] vfio/type1: Get MSI cookie Eric Auger
2016-11-18  5:34   ` [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Bharat Bhushan
2016-11-18  8:33     ` Auger Eric
2016-11-30  9:49   ` Auger Eric
2016-11-30 10:04     ` Ganapatrao Kulkarni
     [not found]       ` <CAFpQJXWp5BfsxU5nkWm7hrq5wp6=b-6iYVHjBQYhmkWN_kSSzg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-11-30 10:14         ` Auger Eric
2016-11-30 10:52           ` Ganapatrao Kulkarni
     [not found]             ` <CAFpQJXVqStQwRkm9F=e+8UFxWsddcwgB=AyfnZXSSaOw3eyBUA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-11-30 13:57               ` Robin Murphy
     [not found]           ` <3d0ddb50-6e63-3fe2-55c0-ce49579905c9-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-30 14:14             ` Alex Williamson
     [not found]     ` <6c9012fd-070b-6218-48e7-69b37f2559dd-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-30 10:37       ` Will Deacon
     [not found]         ` <20161130103713.GB2724-5wv7dgnIgG8@public.gmane.org>
2016-11-30 14:08           ` Auger Eric
     [not found]             ` <1899e46c-7b06-01d6-6cff-eb0985a4f11d-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-30 14:41               ` Robin Murphy
2016-12-07 18:52             ` Shanker Donthineni
     [not found]               ` <165d4f72-ef74-2db8-166a-1f90208315c8-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-12-08  7:34                 ` Auger Eric
2016-12-08  3:56   ` Bharat Bhushan
2016-12-08  9:36   ` Auger Eric
     [not found]     ` <c5d4efa7-699d-4aa3-44cc-4ce03d0ce185-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-08 13:14       ` Robin Murphy
     [not found]         ` <cd16fc5c-8649-0bfa-d67d-8f257aa38bd6-5wv7dgnIgG8@public.gmane.org>
2016-12-08 13:36           ` Auger Eric
     [not found]             ` <48e7d75a-8499-7f41-42d0-08fe081c192b-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-08 15:46               ` Robin Murphy
2016-12-08 17:01           ` Alex Williamson
2016-12-08 18:42             ` Robin Murphy
2016-12-11  2:05       ` Don Dutile
     [not found]         ` <584CB481.3040902-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-12  8:12           ` Auger Eric

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