linux-kernel - [PATCH 0/8] iommufd support pasid attach/replace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231127063428.127436-1-yi.l.liu@intel.com>
Date:   Sun, 26 Nov 2023 22:34:20 -0800
From:   Yi Liu <yi.l.liu@...el.com>
To:     joro@...tes.org, alex.williamson@...hat.com, jgg@...dia.com,
        kevin.tian@...el.com, robin.murphy@....com,
        baolu.lu@...ux.intel.com
Cc:     cohuck@...hat.com, eric.auger@...hat.com, nicolinc@...dia.com,
        kvm@...r.kernel.org, mjrosato@...ux.ibm.com,
        chao.p.peng@...ux.intel.com, yi.l.liu@...el.com,
        yi.y.sun@...ux.intel.com, peterx@...hat.com, jasowang@...hat.com,
        shameerali.kolothum.thodi@...wei.com, lulu@...hat.com,
        suravee.suthikulpanit@....com, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        zhenzhong.duan@...el.com, joao.m.martins@...cle.com,
        xin.zeng@...el.com, yan.y.zhao@...el.com
Subject: [PATCH 0/8] iommufd support pasid attach/replace

PASID (Process Address Space ID) is a PCIe extension to tag the DMA
transactions out of a physical device, and most modern IOMMU hardware
have supported PASID granular address translation. So a PASID-capable
device can be attached to multiple hwpts (a.k.a. domains), each attachment
is tagged with a pasid.

This series first adds a missing iommu API to replace domain for a pasid,
then adds iommufd APIs for device drivers to attach/replace/detach pasid
to/from hwpt per userspace's request, and adds selftest to validate the
iommufd APIs.

pasid attach/replace is mandatory on Intel VT-d given the PASID table
locates in the physical address space hence must be managed by the kernel,
both for supporting vSVA and coming SIOV. But it's optional on ARM/AMD
which allow configuring the PASID/CD table either in host physical address
space or nested on top of an GPA address space. This series only add VT-d
support as the minimal requirement.

Complete code can be found in below link:

https://github.com/yiliu1765/iommufd/tree/iommufd_pasid

Change log:

v1:
 - Implemnet iommu_replace_device_pasid() to fall back to the original domain
   if this replacement failed (Kevin)
 - Add check in do_attach() to check corressponding attach_fn per the pasid value.

rfc: https://lore.kernel.org/linux-iommu/20230926092651.17041-1-yi.l.liu@intel.com/

Regards,
	Yi Liu

Kevin Tian (1):
  iommufd: Support attach/replace hwpt per pasid

Lu Baolu (2):
  iommu: Introduce a replace API for device pasid
  iommu/vt-d: Add set_dev_pasid callback for nested domain

Yi Liu (5):
  iommufd: replace attach_fn with a structure
  iommufd/selftest: Add set_dev_pasid and remove_dev_pasid in mock iommu
  iommufd/selftest: Add a helper to get test device
  iommufd/selftest: Add test ops to test pasid attach/detach
  iommufd/selftest: Add coverage for iommufd pasid attach/detach

 drivers/iommu/intel/nested.c                  |  47 +++++
 drivers/iommu/iommu-priv.h                    |   2 +
 drivers/iommu/iommu.c                         |  82 ++++++--
 drivers/iommu/iommufd/Makefile                |   1 +
 drivers/iommu/iommufd/device.c                |  50 +++--
 drivers/iommu/iommufd/iommufd_private.h       |  23 +++
 drivers/iommu/iommufd/iommufd_test.h          |  24 +++
 drivers/iommu/iommufd/pasid.c                 | 138 ++++++++++++++
 drivers/iommu/iommufd/selftest.c              | 176 ++++++++++++++++--
 include/linux/iommufd.h                       |   6 +
 tools/testing/selftests/iommu/iommufd.c       | 172 +++++++++++++++++
 .../selftests/iommu/iommufd_fail_nth.c        |  28 ++-
 tools/testing/selftests/iommu/iommufd_utils.h |  78 ++++++++
 13 files changed, 785 insertions(+), 42 deletions(-)
 create mode 100644 drivers/iommu/iommufd/pasid.c

-- 
2.34.1