From: Nicolin Chen <nicolinc@nvidia.com>
To: <will@kernel.org>, <robin.murphy@arm.com>, <joro@8bytes.org>,
<alex.williamson@redhat.com>, <cohuck@redhat.com>,
<corbet@lwn.net>
Cc: <nicoleotsuka@gmail.com>, <vdumpa@nvidia.com>,
<thierry.reding@gmail.com>, <linux-tegra@vger.kernel.org>,
<nwatterson@nvidia.com>, <Jonathan.Cameron@huawei.com>,
<jean-philippe@linaro.org>, <song.bao.hua@hisilicon.com>,
<eric.auger@redhat.com>, <thunder.leizhen@huawei.com>,
<yuzenghui@huawei.com>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<iommu@lists.linux-foundation.org>, <kvm@vger.kernel.org>,
<linux-doc@vger.kernel.org>
Subject: [RFC][PATCH v2 00/13] iommu/arm-smmu-v3: Add NVIDIA implementation
Date: Mon, 30 Aug 2021 19:59:10 -0700 [thread overview]
Message-ID: <20210831025923.15812-1-nicolinc@nvidia.com> (raw)
The SMMUv3 devices implemented in the Grace SoC support NVIDIA's custom
CMDQ-Virtualization (CMDQV) hardware. Like the new ECMDQ feature first
introduced in the ARM SMMUv3.3 specification, CMDQV adds multiple VCMDQ
interfaces to supplement the single architected SMMU_CMDQ in an effort
to reduce contention.
This series of patches add CMDQV support with its preparational changes:
* PATCH-1 to PATCH-8 are related to shared VMID feature: they are used
first to improve TLB utilization, second to bind a shared VMID with a
VCMDQ interface for hardware configuring requirement.
* PATCH-9 and PATCH-10 are to accommodate the NVIDIA implementation with
the existing arm-smmu-v3 driver.
* PATCH-11 borrows the "implementation infrastructure" from the arm-smmu
driver so later change can build upon it.
* PATCH-12 adds an initial NVIDIA implementation related to host feature,
and also adds implementation specific ->device_reset() and ->get_cmdq()
callback functions.
* PATCH-13 adds virtualization features using VFIO mdev interface, which
allows user space hypervisor to map and get access to one of the VCMDQ
interfaces of CMDQV module.
( Thinking that reviewers can get a better view of this implementation,
I am attaching QEMU changes here for reference purpose:
https://github.com/nicolinc/qemu/commits/dev/cmdqv_v6.0.0-rc2
The branch has all preparational changes, while I'm still integrating
device model and ARM-VIRT changes, and will push them these two days,
although they might not be in a good shape of being sent to review yet )
Above all, I marked RFC for this series, as I feel that we may come up
some better solution. So please kindly share your reviews and insights.
Thank you!
Changelog
v1->v2:
* Added mdev interface support for hypervisor and VMs.
* Added preparational changes for mdev interface implementation.
* PATCH-12 Changed ->issue_cmdlist() to ->get_cmdq() for a better
integration with recently merged ECMDQ-related changes.
Nate Watterson (3):
iommu/arm-smmu-v3: Add implementation infrastructure
iommu/arm-smmu-v3: Add support for NVIDIA CMDQ-Virtualization hw
iommu/nvidia-smmu-v3: Add mdev interface support
Nicolin Chen (10):
iommu: Add set_nesting_vmid/get_nesting_vmid functions
vfio: add VFIO_IOMMU_GET_VMID and VFIO_IOMMU_SET_VMID
vfio: Document VMID control for IOMMU Virtualization
vfio: add set_vmid and get_vmid for vfio_iommu_type1
vfio/type1: Implement set_vmid and get_vmid
vfio/type1: Set/get VMID to/from iommu driver
iommu/arm-smmu-v3: Add shared VMID support for NESTING
iommu/arm-smmu-v3: Add VMID alloc/free helpers
iommu/arm-smmu-v3: Pass dev pointer to arm_smmu_detach_dev
iommu/arm-smmu-v3: Pass cmdq pointer in arm_smmu_cmdq_issue_cmdlist()
Documentation/driver-api/vfio.rst | 34 +
MAINTAINERS | 2 +
drivers/iommu/arm/arm-smmu-v3/Makefile | 2 +-
.../iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c | 15 +
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 121 +-
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 18 +
.../iommu/arm/arm-smmu-v3/nvidia-smmu-v3.c | 1249 +++++++++++++++++
drivers/iommu/iommu.c | 20 +
drivers/vfio/vfio.c | 25 +
drivers/vfio/vfio_iommu_type1.c | 37 +
include/linux/iommu.h | 5 +
include/linux/vfio.h | 2 +
include/uapi/linux/vfio.h | 26 +
13 files changed, 1537 insertions(+), 19 deletions(-)
create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c
create mode 100644 drivers/iommu/arm/arm-smmu-v3/nvidia-smmu-v3.c
--
2.17.1
next reply other threads:[~2021-08-31 3:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-31 2:59 Nicolin Chen [this message]
2021-08-31 2:59 ` [RFC][PATCH v2 01/13] iommu: Add set_nesting_vmid/get_nesting_vmid functions Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 02/13] vfio: add VFIO_IOMMU_GET_VMID and VFIO_IOMMU_SET_VMID Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 03/13] vfio: Document VMID control for IOMMU Virtualization Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 04/13] vfio: add set_vmid and get_vmid for vfio_iommu_type1 Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 05/13] vfio/type1: Implement set_vmid and get_vmid Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 06/13] vfio/type1: Set/get VMID to/from iommu driver Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 07/13] iommu/arm-smmu-v3: Add shared VMID support for NESTING Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 08/13] iommu/arm-smmu-v3: Add VMID alloc/free helpers Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 09/13] iommu/arm-smmu-v3: Pass dev pointer to arm_smmu_detach_dev Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 10/13] iommu/arm-smmu-v3: Pass cmdq pointer in arm_smmu_cmdq_issue_cmdlist() Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 11/13] iommu/arm-smmu-v3: Add implementation infrastructure Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 12/13] iommu/arm-smmu-v3: Add support for NVIDIA CMDQ-Virtualization hw Nicolin Chen
2021-08-31 2:59 ` [RFC][PATCH v2 13/13] iommu/nvidia-smmu-v3: Add mdev interface support Nicolin Chen
2021-08-31 16:15 ` [RFC][PATCH v2 00/13] iommu/arm-smmu-v3: Add NVIDIA implementation Alex Williamson
2021-09-01 6:55 ` Tian, Kevin
2021-09-02 14:45 ` Jason Gunthorpe
2021-09-02 22:27 ` Tian, Kevin
2021-09-16 18:21 ` Nicolin Chen
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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210831025923.15812-1-nicolinc@nvidia.com \
--to=nicolinc@nvidia.com \
--cc=Jonathan.Cameron@huawei.com \
--cc=alex.williamson@redhat.com \
--cc=cohuck@redhat.com \
--cc=corbet@lwn.net \
--cc=eric.auger@redhat.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jean-philippe@linaro.org \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=nicoleotsuka@gmail.com \
--cc=nwatterson@nvidia.com \
--cc=robin.murphy@arm.com \
--cc=song.bao.hua@hisilicon.com \
--cc=thierry.reding@gmail.com \
--cc=thunder.leizhen@huawei.com \
--cc=vdumpa@nvidia.com \
--cc=will@kernel.org \
--cc=yuzenghui@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* 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).