[PATCH v3 0/4] iommu/smmuv3: Add IOMMUFD dirty tracking support for SMMUv3

From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <iommu@lists.linux.dev>, <linux-arm-kernel@lists.infradead.org>
Cc: <robin.murphy@arm.com>, <will@kernel.org>, <joro@8bytes.org>,
	<jgg@nvidia.com>, <ryan.roberts@arm.com>, <kevin.tian@intel.com>,
	<nicolinc@nvidia.com>, <mshavit@google.com>,
	<eric.auger@redhat.com>, <joao.m.martins@oracle.com>,
	<jiangkunkun@huawei.com>, <zhukeqian1@huawei.com>,
	<linuxarm@huawei.com>
Subject: [PATCH v3 0/4] iommu/smmuv3: Add IOMMUFD dirty tracking support for SMMUv3
Date: Tue, 30 Apr 2024 14:43:04 +0100	[thread overview]
Message-ID: <20240430134308.1604-1-shameerali.kolothum.thodi@huawei.com> (raw)

Hi

v2 --> v3

 -Rebased on top of the latest of Jason's refactor series git[3].
 -Addressed comments from Ryan and Jason(patch 2 & 3, Thanks!)
 -Added R-by tags  to 1 & 4.

Please take a look and let me know your feedback.
Thanks,
Shameer

---
This is revisiting the earlier attempts [1, 2] to use SMMUv3 HTTU feature
for dirty page tracking. The Intel/AMD support is already mainline.

Basic sanity tests are done using an emulation setup and on a test
hardware setup. Block page split/merge(BBML) is not part of this
series. I am planning to send it separately.

v1 --> v2:
https://lore.kernel.org/linux-iommu/20231128094940.1344-1-shameerali.kolothum.thodi@huawei.com/

Addressed review comments from Jason and Joao(Thanks)
   -Moved dirty_ops setting to domain finalise(patch #3)
   -Only enable DBM for stage 1 if domain_alloc_user() requests it.
   -Changed IO page table walker(patch #2) and tested with 4KB/16KB/64KB
    with l1/l2/l3 traversal.(The earlier one had a bug where it fails to
    walk L3 level).
   -Rearranged patches a bit to improve bi-sectability.
   -Rebased on top of Jason's v5 of SMMUv3 new API series git.

1. https://lore.kernel.org/lkml/20210413085457.25400-1-zhukeqian1@huawei.com/
2. https://lore.kernel.org/linux-iommu/20230518204650.14541-1-joao.m.martins@oracle.com/
3. https://github.com/jgunthorpe/linux/commits/smmuv3_newapi

Jean-Philippe Brucker (1):
  iommu/arm-smmu-v3: Add feature detection for HTTU

Joao Martins (1):
  iommu/arm-smmu-v3: Add support for dirty tracking in domain alloc

Kunkun Jiang (1):
  iommu/arm-smmu-v3: Enable HTTU for stage1 with io-pgtable mapping

Shameer Kolothum (1):
  iommu/io-pgtable-arm: Add read_and_clear_dirty() support

 drivers/iommu/Kconfig                       |   1 +
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 129 ++++++++++++++++----
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |   8 ++
 drivers/iommu/io-pgtable-arm.c              | 110 ++++++++++++++++-
 include/linux/io-pgtable.h                  |   4 +
 5 files changed, 226 insertions(+), 26 deletions(-)

-- 
2.34.1

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel