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* [PATCH v2 0/9] IOASID extensions for guest SVA
@ 2020-08-22  4:35 Jacob Pan
  2020-08-22  4:35 ` [PATCH v2 1/9] docs: Document IO Address Space ID (IOASID) APIs Jacob Pan
                   ` (8 more replies)
  0 siblings, 9 replies; 56+ messages in thread
From: Jacob Pan @ 2020-08-22  4:35 UTC (permalink / raw)
  To: iommu, LKML, Jean-Philippe Brucker, Lu Baolu, Joerg Roedel,
	David Woodhouse
  Cc: Tian, Kevin, Raj Ashok, Wu Hao

IOASID was introduced in v5.5 as a generic kernel allocator service for
both PCIe Process Address Space ID (PASID) and ARM SMMU's Sub Stream
ID. In addition to basic ID allocation, ioasid_set was defined as a
token that is shared by a group of IOASIDs. This set token can be used
for permission checking, but lack of some features to address the
following needs by guest Shared Virtual Address (SVA).
- Manage IOASIDs by group, group ownership, quota, etc.
- State synchronization among IOASID users
- Non-identity guest-host IOASID mapping
- Lifecycle management across many users

This patchset introduces the following extensions as solutions to the
problems above.
- Redefine and extend IOASID set such that IOASIDs can be managed by groups.
- Add notifications for IOASID state synchronization
- Add reference counting for life cycle alignment among users
- Support ioasid_set private IDs, which can be used as guest IOASIDs
Please refer to Documentation/ioasid.rst in enclosed patch 1/9 for more
details.

This patchset only included VT-d driver as users of some of the new APIs.
VFIO and KVM patches are coming up to fully utilize the APIs introduced
here.

You can find this series at:
https://github.com/jacobpan/linux.git ioasid_ext_v2
(VFIO and KVM patches will be available at this branch when published.)

This work is a result of collaboration with many people:
Liu, Yi L <yi.l.liu@intel.com>
Wu Hao <hao.wu@intel.com>
Ashok Raj <ashok.raj@intel.com>
Kevin Tian <kevin.tian@intel.com>

Thanks,

Jacob

Changelog

V2:
- Redesigned ioasid_set APIs, removed set ID
- Added set private ID (SPID) for guest PASID usage.
- Add per ioasid_set notification and priority support.
- Back to use spinlocks and atomic notifications.
- Added async work in VT-d driver to perform teardown outside atomic context

Jacob Pan (9):
  docs: Document IO Address Space ID (IOASID) APIs
  iommu/ioasid: Rename ioasid_set_data()
  iommu/ioasid: Introduce ioasid_set APIs
  iommu/ioasid: Add reference couting functions
  iommu/ioasid: Introduce ioasid_set private ID
  iommu/ioasid: Introduce notification APIs
  iommu/vt-d: Listen to IOASID notifications
  iommu/vt-d: Send IOASID bind/unbind notifications
  iommu/vt-d: Store guest PASID during bind

 Documentation/ioasid.rst    | 618 ++++++++++++++++++++++++++++++++
 drivers/iommu/intel/iommu.c |  27 +-
 drivers/iommu/intel/pasid.h |   1 +
 drivers/iommu/intel/svm.c   |  97 ++++-
 drivers/iommu/ioasid.c      | 835 ++++++++++++++++++++++++++++++++++++++++++--
 include/linux/intel-iommu.h |   2 +
 include/linux/ioasid.h      | 166 ++++++++-
 7 files changed, 1699 insertions(+), 47 deletions(-)
 create mode 100644 Documentation/ioasid.rst

-- 
2.7.4

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^ permalink raw reply	[flat|nested] 56+ messages in thread

end of thread, other threads:[~2020-09-24 18:29 UTC | newest]

Thread overview: 56+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-22  4:35 [PATCH v2 0/9] IOASID extensions for guest SVA Jacob Pan
2020-08-22  4:35 ` [PATCH v2 1/9] docs: Document IO Address Space ID (IOASID) APIs Jacob Pan
2020-08-23  7:05   ` Lu Baolu
2020-08-28 17:01     ` Jacob Pan
2020-08-24 10:32   ` Jean-Philippe Brucker
2020-08-27 16:21     ` Auger Eric
2020-09-01 16:56       ` Jacob Pan
2020-09-07  8:03         ` Auger Eric
2020-09-08 17:29           ` Jacob Pan
2020-08-28 22:24     ` Jacob Pan
2020-08-22  4:35 ` [PATCH v2 2/9] iommu/ioasid: Rename ioasid_set_data() Jacob Pan
2020-08-24 18:29   ` Jean-Philippe Brucker
2020-09-01 11:51   ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 3/9] iommu/ioasid: Introduce ioasid_set APIs Jacob Pan
2020-08-22 12:53   ` kernel test robot
2020-08-24  2:24   ` Lu Baolu
2020-09-01 21:28     ` Jacob Pan
2020-09-02  2:39       ` Lu Baolu
2020-08-24 18:28   ` Jean-Philippe Brucker
2020-08-24 18:30     ` Randy Dunlap
2020-09-02 21:46       ` Jacob Pan
2020-08-24 18:34     ` Randy Dunlap
2020-09-02 21:47       ` Jacob Pan
2020-09-02 21:44     ` Jacob Pan
2020-09-01 11:51   ` Auger Eric
2020-09-03 21:07     ` Jacob Pan
2020-09-07  8:04       ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 4/9] iommu/ioasid: Add reference couting functions Jacob Pan
2020-08-24  2:26   ` Lu Baolu
2020-08-25 10:20     ` Jean-Philippe Brucker
2020-08-25 10:19   ` Jean-Philippe Brucker
2020-09-08 20:30     ` Jacob Pan
2020-09-01 12:13   ` Auger Eric
2020-09-08 20:49     ` Jacob Pan
2020-09-24 18:29   ` Shameerali Kolothum Thodi
2020-08-22  4:35 ` [PATCH v2 5/9] iommu/ioasid: Introduce ioasid_set private ID Jacob Pan
2020-08-22  8:36   ` kernel test robot
2020-08-22  9:03   ` kernel test robot
2020-08-25 10:22   ` Jean-Philippe Brucker
2020-09-08 22:19     ` Jacob Pan
2020-09-01 15:38   ` Auger Eric
2020-09-08 22:40     ` Jacob Pan
2020-09-10  9:18       ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 6/9] iommu/ioasid: Introduce notification APIs Jacob Pan
2020-08-25 10:26   ` Jean-Philippe Brucker
2020-09-09 20:37     ` Jacob Pan
2020-09-01 16:49   ` Auger Eric
2020-09-09 22:58     ` Jacob Pan
2020-09-10  8:59       ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 7/9] iommu/vt-d: Listen to IOASID notifications Jacob Pan
2020-09-01 17:03   ` Auger Eric
2020-09-10  4:54     ` Jacob Pan
2020-08-22  4:35 ` [PATCH v2 8/9] iommu/vt-d: Send IOASID bind/unbind notifications Jacob Pan
2020-08-22  4:35 ` [PATCH v2 9/9] iommu/vt-d: Store guest PASID during bind Jacob Pan
2020-09-01 17:08   ` Auger Eric
2020-09-10 17:12     ` Jacob Pan

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