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| author |   Nicolin Chen <nicolinc@nvidia.com> | 2024-11-05 12:05:11 -0800 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2024-11-12 11:46:19 -0400 |
| commit | 67db79dc1a411335f8a7e53a5e206d96b237d9a8 (patch) | |
| tree | 14ebd2c8ff0aa13887cfcce514618e969f860881 | |
| parent | iommufd/selftest: Add IOMMU_VDEVICE_ALLOC test coverage (diff) | |
| download | wireguard-linux-67db79dc1a411335f8a7e53a5e206d96b237d9a8.tar.xz wireguard-linux-67db79dc1a411335f8a7e53a5e206d96b237d9a8.zip | |
iommu/viommu: Add cache_invalidate to iommufd_viommu_ops
This per-vIOMMU cache_invalidate op is like the cache_invalidate_user op
in struct iommu_domain_ops, but wider, supporting device cache (e.g. PCI
ATC invaldiations).
Link: https://patch.msgid.link/r/90138505850fa6b165135e78a87b4cc7022869a4.1730836308.git.nicolinc@nvidia.com
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/iommufd.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 71fa1e343023..2bc735ff9511 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -16,6 +16,7 @@ struct device; struct file; struct iommu_group; struct iommu_user_data; +struct iommu_user_data_array; struct iommufd_access; struct iommufd_ctx; struct iommufd_device; @@ -105,12 +106,21 @@ struct iommufd_viommu { * must be defined in include/uapi/linux/iommufd.h. * It must fully initialize the new iommu_domain before * returning. Upon failure, ERR_PTR must be returned. + * @cache_invalidate: Flush hardware cache used by a vIOMMU. It can be used for + * any IOMMU hardware specific cache: TLB and device cache. + * The @array passes in the cache invalidation requests, in + * form of a driver data structure. A driver must update the + * array->entry_num to report the number of handled requests. + * The data structure of the array entry must be defined in + * include/uapi/linux/iommufd.h */ struct iommufd_viommu_ops { void (*destroy)(struct iommufd_viommu *viommu); struct iommu_domain *(*alloc_domain_nested)( struct iommufd_viommu *viommu, u32 flags, const struct iommu_user_data *user_data); + int (*cache_invalidate)(struct iommufd_viommu *viommu, + struct iommu_user_data_array *array); }; #if IS_ENABLED(CONFIG_IOMMUFD) |