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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-08-03 03:08:02 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-08-15 02:13:45 +0300 |
| commit | 23a1b46f15d57583927742738579363f179942b1 (patch) | |
| tree | 1c965223b2a2ac444075a6093c59d81356de9152 /drivers/iommu/iommu-priv.h | |
| parent | c157fd88619946cd62af47c45214c479749dad8d (diff) | |
| download | linux-23a1b46f15d57583927742738579363f179942b1.tar.xz | |
iommufd/selftest: Make the mock iommu driver into a real driver
I've avoided doing this because there is no way to make this happen
without an intrusion into the core code. Up till now this has avoided
needing the core code's probe path with some hackery - but now that
default domains are becoming mandatory it is unavoidable.
This became a serious problem when the core code stopped allowing
partially registered iommu drivers in commit 14891af3799e ("iommu: Move
the iommu driver sysfs setup into iommu_init/deinit_device()") which
breaks the selftest. That series was developed along with a second series
that contained this patch so it was not noticed.
Make it so that iommufd selftest can create a real iommu driver and bind
it only to is own private bus. Add iommu_device_register_bus() as a core
code helper to make this possible. It simply sets the right pointers and
registers the notifier block. The mock driver then works like any normal
driver should, with probe triggered by the bus ops
When the bus->iommu_ops stuff is fully unwound we can probably do better
here and remove this special case.
Link: https://lore.kernel.org/r/15-v6-e8114faedade+425-iommu_all_defdom_jgg@nvidia.com
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/iommu-priv.h')
| -rw-r--r-- | drivers/iommu/iommu-priv.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-priv.h b/drivers/iommu/iommu-priv.h index 7c8011bfd153..e3e3b2015854 100644 --- a/drivers/iommu/iommu-priv.h +++ b/drivers/iommu/iommu-priv.h @@ -1,4 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. + */ #ifndef __LINUX_IOMMU_PRIV_H #define __LINUX_IOMMU_PRIV_H @@ -7,4 +9,11 @@ int iommu_group_replace_domain(struct iommu_group *group, struct iommu_domain *new_domain); +int iommu_device_register_bus(struct iommu_device *iommu, + const struct iommu_ops *ops, struct bus_type *bus, + struct notifier_block *nb); +void iommu_device_unregister_bus(struct iommu_device *iommu, + struct bus_type *bus, + struct notifier_block *nb); + #endif /* __LINUX_IOMMU_PRIV_H */ |