archive mirror
 help / color / mirror / Atom feed
From: Jordan Crouse <>
Cc:, David Airlie <>,, Sharat Masetty <>,,,, Daniel Vetter <>,, Sean Paul <>,
Subject: [PATCH v1 0/6] iommu/arm-smmu: Auxiliary domain and per instance pagetables
Date: Tue, 28 Jan 2020 15:16:04 -0700	[thread overview]
Message-ID: <> (raw)

Some clients have a requirement to sandbox memory mappings for security and
advanced features like SVM. This series adds support to enable per-instance
pagetables as auxiliary domains in the arm-smmu driver and adds per-instance
support for the Adreno GPU.

This patchset builds on the split pagetable support from [1]. In that series the
TTBR1 address space is programmed for the default ("master") domain and enables
support for auxiliary domains. Each new auxiliary domain will allocate a
pagetable which the leaf driver can program through the usual IOMMU APIs. It can
also query the physical address of the pagetable.

In the SMMU driver the first auxiliary domain will enable and program the TTBR0
space. Subsequent auxiliary domains won't touch the hardware. Similarly when
the last auxiliary domain is detached the TTBR0 region will be disabled again.

In the Adreno driver each new file descriptor instance will create a new
auxiliary domain / pagetable and use it for all the memory allocations of that
instance. The driver will query the base address of each pagetable and switch
them dynamically using the built-in table switch capability of the GPU. If any
of these features fail the driver will automatically fall back to using the
default (global) pagetable.

This patchset had previously been submitted as [2] but has been significantly
modified since then.



Jordan Crouse (6):
  arm/smmu: Add auxiliary domain support for arm-smmuv2
  drm/msm/adreno: ADd support for IOMMU auxiliary domains
  drm/msm: Add support to create target specific address spaces
  drm/msm/gpu: Add ttbr0 to the memptrs
  drm/msm/a6xx: Support per-instance pagetables

 drivers/gpu/drm/msm/adreno/a6xx_gpu.c |  89 +++++++++++++
 drivers/gpu/drm/msm/msm_drv.c         |  22 +++-
 drivers/gpu/drm/msm/msm_gpu.h         |   2 +
 drivers/gpu/drm/msm/msm_iommu.c       |  72 +++++++++++
 drivers/gpu/drm/msm/msm_mmu.h         |   3 +
 drivers/gpu/drm/msm/msm_ringbuffer.h  |   1 +
 drivers/iommu/arm-smmu.c              | 230 +++++++++++++++++++++++++++++++---
 drivers/iommu/arm-smmu.h              |   3 +
 include/linux/iommu.h                 |   2 +
 9 files changed, 405 insertions(+), 19 deletions(-)

iommu mailing list

             reply	other threads:[~2020-01-28 22:16 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-28 22:16 Jordan Crouse [this message]
2020-01-28 22:16 ` [PATCH v1 1/6] iommu: Add DOMAIN_ATTR_PTBASE Jordan Crouse
2020-01-28 22:16 ` [PATCH v1 2/6] arm/smmu: Add auxiliary domain support for arm-smmuv2 Jordan Crouse
2020-03-18 22:48   ` Will Deacon
2020-03-18 23:43     ` Rob Clark
2020-03-19 15:23       ` Jordan Crouse
2020-05-18 15:18       ` Will Deacon
2020-05-18 15:50         ` Rob Clark
2020-05-20 12:57           ` Will Deacon
2020-05-20 15:13             ` Jordan Crouse
2020-05-20 16:35               ` Rob Clark
2020-01-28 22:16 ` [PATCH v1 3/6] drm/msm/adreno: ADd support for IOMMU auxiliary domains Jordan Crouse
2020-01-28 22:16 ` [PATCH v1 4/6] drm/msm: Add support to create target specific address spaces Jordan Crouse
2020-01-28 22:16 ` [PATCH v1 5/6] drm/msm/gpu: Add ttbr0 to the memptrs Jordan Crouse
2020-01-28 22:16 ` [PATCH v1 6/6] drm/msm/a6xx: Support per-instance pagetables Jordan Crouse

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).