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Message-ID: <cover.1723056910.git.nicolinc@nvidia.com>
Date: Wed, 7 Aug 2024 12:00:03 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: <jgg@...dia.com>, <kevin.tian@...el.com>, <will@...nel.org>
CC: <robin.murphy@....com>, <joro@...tes.org>, <shuah@...nel.org>,
<iommu@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
<linux-kselftest@...r.kernel.org>
Subject: [PATCH v3 0/4] iommu: Support IOMMU_RESV_SW_MSI with nesting
The dma-iommu needs to find the correct domain for MSI mapping. With an
IOMMU_DOMAIN_NESTED, the mapping resides in its parent paging domain.
Add a get_msi_mapping_domain op for drivers to return paging domains.
Add an iommufd selftest coverage for that, by doing a loopback test.
Add arm_smmu_get_msi_mapping_domain in the SMMUv3 driver so its nesting
feature could work with MSI correctly.
This is based on top of the reserved-IOVA change:
https://lore.kernel.org/all/20240802053458.2754673-1-nicolinc@nvidia.com/
And Jason's SMMUv3 nesting series:
https://lore.kernel.org/all/0-v1-54e734311a7f+14f72-smmuv3_nesting_jgg@nvidia.com/
This series is on Github:
https://github.com/nicolinc/iommufd/commits/iommufd_nesting_sw_msi/
[changelog]
v3:
* Refined PATCH-2 commit message
* Added domain->ops check in PATCH-2
* Added PATCH-4 to implement in SMMUv3 driver
v2:
https://lore.kernel.org/all/cover.1722644866.git.nicolinc@nvidia.com/
* Resent with a proper bug fix.
Thanks
Nicolin
Nicolin Chen (3):
iommufd: Reorder include files
iommufd/selftest: Add coverage for IOMMU_RESV_SW_MSI
iommu/arm-smmu-v3: Implement arm_smmu_get_msi_mapping_domain
Robin Murphy (1):
iommu/dma: Support MSIs through nested domains
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 10 ++
drivers/iommu/dma-iommu.c | 18 +++-
drivers/iommu/iommufd/device.c | 4 +-
drivers/iommu/iommufd/fault.c | 4 +-
drivers/iommu/iommufd/io_pagetable.c | 8 +-
drivers/iommu/iommufd/io_pagetable.h | 2 +-
drivers/iommu/iommufd/ioas.c | 2 +-
drivers/iommu/iommufd/iommufd_private.h | 9 +-
drivers/iommu/iommufd/iommufd_test.h | 6 +-
drivers/iommu/iommufd/iova_bitmap.c | 2 +-
drivers/iommu/iommufd/main.c | 8 +-
drivers/iommu/iommufd/pages.c | 10 +-
drivers/iommu/iommufd/selftest.c | 92 ++++++++++++++++++-
include/linux/iommu.h | 4 +
include/linux/iommufd.h | 4 +-
include/uapi/linux/iommufd.h | 2 +-
tools/testing/selftests/iommu/iommufd_utils.h | 9 ++
17 files changed, 160 insertions(+), 34 deletions(-)
--
2.43.0
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