From: Nicolin Chen <nicolinc@nvidia.com>
To: <joro@8bytes.org>, <will@kernel.org>, <marcan@marcan.st>,
<sven@svenpeter.dev>, <robin.murphy@arm.com>,
<robdclark@gmail.com>, <baolu.lu@linux.intel.com>,
<matthias.bgg@gmail.com>, <orsonzhai@gmail.com>,
<baolin.wang7@gmail.com>, <zhang.lyra@gmail.com>,
<jean-philippe@linaro.org>, <alex.williamson@redhat.com>,
<jgg@nvidia.com>, <kevin.tian@intel.com>
Cc: <suravee.suthikulpanit@amd.com>, <alyssa@rosenzweig.io>,
<dwmw2@infradead.org>, <yong.wu@mediatek.com>,
<mjrosato@linux.ibm.com>, <gerald.schaefer@linux.ibm.com>,
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<jonathanh@nvidia.com>, <cohuck@redhat.com>,
<thunder.leizhen@huawei.com>, <tglx@linutronix.de>,
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<isaacm@codeaurora.org>, <yangyingliang@huawei.com>,
<jordan@cosmicpenguin.net>, <iommu@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-arm-msm@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>,
<linux-s390@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<virtualization@lists.linux-foundation.org>,
<kvm@vger.kernel.org>
Subject: [PATCH v2 0/5] Simplify vfio_iommu_type1 attach/detach routine
Date: Wed, 15 Jun 2022 17:02:59 -0700 [thread overview]
Message-ID: <20220616000304.23890-1-nicolinc@nvidia.com> (raw)
This is a preparatory series for IOMMUFD v2 patches. It enforces error
code -EMEDIUMTYPE in iommu_attach_device() and iommu_attach_group() when
an IOMMU domain and a device/group are incompatible. It also drops the
useless domain->ops check since it won't fail in current environment.
These allow VFIO iommu code to simplify its group attachment routine, by
avoiding the extra IOMMU domain allocations and attach/detach sequences
of the old code.
Worths mentioning the exact match for enforce_cache_coherency is removed
with this series, since there's very less value in doing that since KVM
won't be able to take advantage of it -- this just wastes domain memory.
Instead, we rely on Intel IOMMU driver taking care of that internally.
This is on github: https://github.com/nicolinc/iommufd/commits/vfio_iommu_attach
Changelog
v2:
* Added -EMEDIUMTYPE to more IOMMU drivers that fit the category.
* Changed dev_err to dev_dbg for -EMEDIUMTYPE to avoid kernel log spam.
* Dropped iommu_ops patch, and removed domain->ops in VFIO directly,
since there's no mixed-driver use case that would fail the sanity.
* Updated commit log of the patch removing enforce_cache_coherency.
* Fixed a misplace of "num_non_pinned_groups--" in detach_group patch.
* Moved "num_non_pinned_groups++" in PATCH-5 to the common path between
domain-reusing and new-domain pathways, like the code previously did.
* Fixed a typo in EMEDIUMTYPE patch.
v1: https://lore.kernel.org/kvm/20220606061927.26049-1-nicolinc@nvidia.com/
Jason Gunthorpe (1):
vfio/iommu_type1: Prefer to reuse domains vs match enforced cache
coherency
Nicolin Chen (4):
iommu: Return -EMEDIUMTYPE for incompatible domain and device/group
vfio/iommu_type1: Remove the domain->ops comparison
vfio/iommu_type1: Clean up update_dirty_scope in detach_group()
vfio/iommu_type1: Simplify group attachment
drivers/iommu/amd/iommu.c | 2 +-
drivers/iommu/apple-dart.c | 4 +-
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 12 +-
drivers/iommu/arm/arm-smmu/arm-smmu.c | 4 +-
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 4 +-
drivers/iommu/intel/iommu.c | 6 +-
drivers/iommu/iommu.c | 28 ++
drivers/iommu/ipmmu-vmsa.c | 4 +-
drivers/iommu/mtk_iommu_v1.c | 2 +-
drivers/iommu/omap-iommu.c | 4 +-
drivers/iommu/s390-iommu.c | 2 +-
drivers/iommu/sprd-iommu.c | 4 +-
drivers/iommu/tegra-gart.c | 2 +-
drivers/iommu/virtio-iommu.c | 4 +-
drivers/vfio/vfio_iommu_type1.c | 317 ++++++++++----------
15 files changed, 220 insertions(+), 179 deletions(-)
--
2.17.1
next reply other threads:[~2022-06-16 0:03 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-16 0:02 Nicolin Chen [this message]
2022-06-16 0:03 ` [PATCH v2 1/5] iommu: Return -EMEDIUMTYPE for incompatible domain and device/group Nicolin Chen
2022-06-16 2:09 ` Baolu Lu
2022-06-16 2:40 ` Nicolin Chen
2022-06-16 6:28 ` Tian, Kevin
2022-06-16 0:03 ` [PATCH v2 2/5] vfio/iommu_type1: Prefer to reuse domains vs match enforced cache coherency Nicolin Chen
2022-06-16 6:29 ` Tian, Kevin
2022-06-21 22:46 ` Alex Williamson
2022-06-21 23:47 ` Nicolin Chen
2022-06-16 0:03 ` [PATCH v2 3/5] vfio/iommu_type1: Remove the domain->ops comparison Nicolin Chen
2022-06-16 6:40 ` Tian, Kevin
2022-06-16 22:23 ` Nicolin Chen
2022-06-22 7:54 ` Robin Murphy
2022-06-23 3:50 ` Tian, Kevin
2022-06-23 7:47 ` Nicolin Chen
2022-06-24 13:16 ` Jason Gunthorpe
2022-06-24 18:31 ` Robin Murphy
2022-06-24 18:46 ` Jason Gunthorpe
2022-06-16 0:03 ` [PATCH v2 4/5] vfio/iommu_type1: Clean up update_dirty_scope in detach_group() Nicolin Chen
2022-06-16 6:45 ` Tian, Kevin
2022-06-16 22:26 ` Nicolin Chen
2022-06-16 0:03 ` [PATCH v2 5/5] vfio/iommu_type1: Simplify group attachment Nicolin Chen
2022-06-16 7:08 ` Tian, Kevin
2022-06-16 22:40 ` Nicolin Chen
2022-06-17 2:53 ` Tian, Kevin
2022-06-17 23:07 ` Nicolin Chen
2022-06-20 4:03 ` Jason Gunthorpe
2022-06-21 20:59 ` Nicolin Chen
2022-06-20 10:11 ` Robin Murphy
2022-06-21 21:08 ` Nicolin Chen
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