From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, David Woodhouse <dwmw2@infradead.org>
Cc: ashok.raj@intel.com, sanjay.k.kumar@intel.com,
jacob.jun.pan@intel.com, kevin.tian@intel.com,
yi.l.liu@intel.com, yi.y.sun@intel.com, peterx@redhat.com,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v3 00/12] iommu/vt-d: Add scalable mode support
Date: Sun, 7 Oct 2018 13:28:41 +0800 [thread overview]
Message-ID: <20181007052853.25940-1-baolu.lu@linux.intel.com> (raw)
Hi,
Intel vt-d rev3.0 [1] introduces a new translation mode called
'scalable mode', which enables PASID-granular translations for
first level, second level, nested and pass-through modes. The
vt-d scalable mode is the key ingredient to enable Scalable I/O
Virtualization (Scalable IOV) [2] [3], which allows sharing a
device in minimal possible granularity (ADI - Assignable Device
Interface). It also includes all the capabilities required to
enable Shared Virtual Addressing (SVA). As a result, previous
Extended Context (ECS) mode is deprecated (no production ever
implements ECS).
Each scalable mode pasid table entry is 64 bytes in length, with
fields point to the first level page table and the second level
page table. The PGTT (Pasid Granular Translation Type) field is
used by hardware to determine the translation type.
A Scalable Mode .-------------.
PASID Entry .-| |
.------------------. .-| | 1st Level |
7| | | | | Page Table |
.------------------. | | | |
6| | | | | |
'------------------' | | '-------------'
5| | | '-------------'
'------------------' '-------------'
4| | ^
'------------------' /
3| | / .-------------.
.----.-------.-----. / .-| |
2| | FLPTR | |/ .-| | 2nd Level |
.----'-------'-----. | | | Page Table |
1| | | | | |
.-.-------..------.. | | | |
0| | SLPTR || PGTT ||----> | | '-------------'
'-'-------''------'' | '-------------'
6 | 0 '-------------'
3 v
.------------------------------------.
| PASID Granular Translation Type |
| |
| 001b: 1st level translation only |
| 101b: 2nd level translation only |
| 011b: Nested translation |
| 100b: Pass through |
'------------------------------------'
This patch series adds the scalable mode support in the Intel
IOMMU driver. It will make all the Intel IOMMU features work
in scalable mode. The changes are all constrained within the
Intel IOMMU driver, as it's purely internal format change.
References:
[1] https://software.intel.com/en-us/download/intel-virtualization-technology-for-directed-io-architecture-specification
[2] https://software.intel.com/en-us/download/intel-scalable-io-virtualization-technical-specification
[3] https://schd.ws/hosted_files/lc32018/00/LC3-SIOV-final.pdf
Change log:
v2->v3:
- Rebase all patches on top of vt-d branch of iommu repo.
- Set the pasid directory table size to 1 page for devices
which have no pasid support.
- Fix various comments received during v2 review period.
All were code style related.
v1->v2:
- Rebase all patches on top of v4.19-rc1;
- Add 256-bit invalidation descriptor support;
- Reserve a domain id for first level and pass-through
usage to make hardware cache entries more efficiently;
- Various code refinements.
Lu Baolu (12):
iommu/vt-d: Enumerate the scalable mode capability
iommu/vt-d: Manage scalalble mode PASID tables
iommu/vt-d: Move page table helpers into header
iommu/vt-d: Add 256-bit invalidation descriptor support
iommu/vt-d: Reserve a domain id for FL and PT modes
iommu/vt-d: Add second level page table interface
iommu/vt-d: Setup pasid entry for RID2PASID support
iommu/vt-d: Pass pasid table to context mapping
iommu/vt-d: Setup context and enable RID2PASID support
iommu/vt-d: Add first level page table interface
iommu/vt-d: Shared virtual address in scalable mode
iommu/vt-d: Remove deferred invalidation
.../admin-guide/kernel-parameters.txt | 12 +-
drivers/iommu/dmar.c | 83 ++--
drivers/iommu/intel-iommu.c | 312 ++++++-------
drivers/iommu/intel-pasid.c | 417 +++++++++++++++++-
drivers/iommu/intel-pasid.h | 35 +-
drivers/iommu/intel-svm.c | 170 +++----
drivers/iommu/intel_irq_remapping.c | 6 +-
include/linux/dma_remapping.h | 9 +-
include/linux/intel-iommu.h | 66 ++-
9 files changed, 776 insertions(+), 334 deletions(-)
--
2.17.1
next reply other threads:[~2018-10-07 5:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-07 5:28 Lu Baolu [this message]
2018-10-07 5:28 ` [PATCH v3 01/12] iommu/vt-d: Enumerate the scalable mode capability Lu Baolu
2018-10-07 5:28 ` [PATCH v3 02/12] iommu/vt-d: Manage scalalble mode PASID tables Lu Baolu
2018-10-07 5:28 ` [PATCH v3 03/12] iommu/vt-d: Move page table helpers into header Lu Baolu
2018-10-07 5:28 ` [PATCH v3 04/12] iommu/vt-d: Add 256-bit invalidation descriptor support Lu Baolu
2018-10-07 5:28 ` [PATCH v3 05/12] iommu/vt-d: Reserve a domain id for FL and PT modes Lu Baolu
2018-10-07 5:28 ` [PATCH v3 06/12] iommu/vt-d: Add second level page table interface Lu Baolu
2018-10-07 5:28 ` [PATCH v3 07/12] iommu/vt-d: Setup pasid entry for RID2PASID support Lu Baolu
2018-10-07 5:28 ` [PATCH v3 08/12] iommu/vt-d: Pass pasid table to context mapping Lu Baolu
2018-10-07 5:28 ` [PATCH v3 09/12] iommu/vt-d: Setup context and enable RID2PASID support Lu Baolu
2018-10-07 5:28 ` [PATCH v3 10/12] iommu/vt-d: Add first level page table interface Lu Baolu
2018-10-07 5:28 ` [PATCH v3 11/12] iommu/vt-d: Shared virtual address in scalable mode Lu Baolu
2018-10-07 5:28 ` [PATCH v3 12/12] iommu/vt-d: Remove deferred invalidation Lu Baolu
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