diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2025-02-19 17:31:40 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-02-21 10:49:05 -0400 |
| commit | 748706d7ca06012621b32851b68136bf33613b9e (patch) | |
| tree | 1440bf4322b133f66d678067eb0dc83b536302a4 | |
| parent | 96093fe54f4864b07013cf61b847708233832841 (diff) | |
iommu: Turn fault_data to iommufd private pointer
A "fault_data" was added exclusively for the iommufd_fault_iopf_handler()
used by IOPF/PRI use cases, along with the attach_handle. Now, the iommufd
version of the sw_msi function will reuse the attach_handle and fault_data
for a non-fault case.
Rename "fault_data" to "iommufd_hwpt" so as not to confine it to a "fault"
case. Move it into a union to be the iommufd private pointer. A following
patch will move the iova_cookie to the union for dma-iommu too after the
iommufd_sw_msi implementation is added.
Since we have two unions now, add some simple comments for readability.
Link: https://patch.msgid.link/r/ee5039503f28a16590916e9eef28b917e2d1607a.1740014950.git.nicolinc@nvidia.com
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | drivers/iommu/iommufd/fault.c | 2 | ||||
| -rw-r--r-- | drivers/iommu/iommufd/hw_pagetable.c | 2 | ||||
| -rw-r--r-- | include/linux/iommu.h | 6 |
3 files changed, 6 insertions, 4 deletions
diff --git a/drivers/iommu/iommufd/fault.c b/drivers/iommu/iommufd/fault.c index 931a3fbe6e32..c48d72c9668c 100644 --- a/drivers/iommu/iommufd/fault.c +++ b/drivers/iommu/iommufd/fault.c @@ -329,7 +329,7 @@ int iommufd_fault_iopf_handler(struct iopf_group *group) struct iommufd_hw_pagetable *hwpt; struct iommufd_fault *fault; - hwpt = group->attach_handle->domain->fault_data; + hwpt = group->attach_handle->domain->iommufd_hwpt; fault = hwpt->fault; spin_lock(&fault->lock); diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index 598be26a14e2..2641d50f46cf 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -406,10 +406,10 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) } hwpt->fault = fault; hwpt->domain->iopf_handler = iommufd_fault_iopf_handler; - hwpt->domain->fault_data = hwpt; refcount_inc(&fault->obj.users); iommufd_put_object(ucmd->ictx, &fault->obj); } + hwpt->domain->iommufd_hwpt = hwpt; cmd->out_hwpt_id = hwpt->obj.id; rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 761c5e186de9..e93d2e918599 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -224,8 +224,10 @@ struct iommu_domain { phys_addr_t msi_addr); #endif - void *fault_data; - union { + union { /* Pointer usable by owner of the domain */ + struct iommufd_hw_pagetable *iommufd_hwpt; /* iommufd */ + }; + union { /* Fault handler */ struct { iommu_fault_handler_t handler; void *handler_token; |