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| author | Joao Martins <joao.m.martins@oracle.com> | 2023-10-24 14:50:57 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-24 11:58:43 -0300 |
| commit | e2a4b294784957fc28ecb1fed8a7e69da18eb18d (patch) | |
| tree | 17108b4962b49f0b6f385f18ac768cd32c7c7cb1 /include | |
| parent | 5f9bdbf4c65860cc8b9c544d92bfd76fbea8d9c5 (diff) | |
| download | linux-stable-e2a4b294784957fc28ecb1fed8a7e69da18eb18d.tar.gz linux-stable-e2a4b294784957fc28ecb1fed8a7e69da18eb18d.tar.bz2 linux-stable-e2a4b294784957fc28ecb1fed8a7e69da18eb18d.zip | |
iommufd: Add IOMMU_HWPT_SET_DIRTY_TRACKING
Every IOMMU driver should be able to implement the needed iommu domain ops
to control dirty tracking.
Connect a hw_pagetable to the IOMMU core dirty tracking ops, specifically
the ability to enable/disable dirty tracking on an IOMMU domain
(hw_pagetable id). To that end add an io_pagetable kernel API to toggle
dirty tracking:
* iopt_set_dirty_tracking(iopt, [domain], state)
The intended caller of this is via the hw_pagetable object that is created.
Internally it will ensure the leftover dirty state is cleared /right
before/ dirty tracking starts. This is also useful for iommu drivers which
may decide that dirty tracking is always-enabled at boot without wanting to
toggle dynamically via corresponding iommu domain op.
Link: https://lore.kernel.org/r/20231024135109.73787-7-joao.m.martins@oracle.com
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/iommufd.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index c76248410120..5c82b68c88f3 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -47,6 +47,7 @@ enum { IOMMUFD_CMD_VFIO_IOAS, IOMMUFD_CMD_HWPT_ALLOC, IOMMUFD_CMD_GET_HW_INFO, + IOMMUFD_CMD_HWPT_SET_DIRTY_TRACKING, }; /** @@ -453,4 +454,31 @@ struct iommu_hw_info { __u32 __reserved; }; #define IOMMU_GET_HW_INFO _IO(IOMMUFD_TYPE, IOMMUFD_CMD_GET_HW_INFO) + +/* + * enum iommufd_hwpt_set_dirty_tracking_flags - Flags for steering dirty + * tracking + * @IOMMU_HWPT_DIRTY_TRACKING_ENABLE: Enable dirty tracking + */ +enum iommufd_hwpt_set_dirty_tracking_flags { + IOMMU_HWPT_DIRTY_TRACKING_ENABLE = 1, +}; + +/** + * struct iommu_hwpt_set_dirty_tracking - ioctl(IOMMU_HWPT_SET_DIRTY_TRACKING) + * @size: sizeof(struct iommu_hwpt_set_dirty_tracking) + * @flags: Combination of enum iommufd_hwpt_set_dirty_tracking_flags + * @hwpt_id: HW pagetable ID that represents the IOMMU domain + * @__reserved: Must be 0 + * + * Toggle dirty tracking on an HW pagetable. + */ +struct iommu_hwpt_set_dirty_tracking { + __u32 size; + __u32 flags; + __u32 hwpt_id; + __u32 __reserved; +}; +#define IOMMU_HWPT_SET_DIRTY_TRACKING _IO(IOMMUFD_TYPE, \ + IOMMUFD_CMD_HWPT_SET_DIRTY_TRACKING) #endif |