On 9/26/23 5:26 PM, Yi Liu wrote:
Most of the core logic before conducting the actual device attach/ replace operation can be shared with pasid attach/replace. Create a new structure so more information (e.g. pasid) can be later added along with the attach_fn.
Signed-off-by: Kevin Tiankevin.tian@intel.com Signed-off-by: Yi Liuyi.l.liu@intel.com
drivers/iommu/iommufd/device.c | 35 ++++++++++++++++--------- drivers/iommu/iommufd/iommufd_private.h | 8 ++++++ 2 files changed, 30 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 645ab5d290fe..4fa4153c5df7 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -597,8 +597,11 @@ iommufd_device_do_replace(struct iommufd_device *idev, return ERR_PTR(rc); } -typedef struct iommufd_hw_pagetable *(*attach_fn)(
- struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt);
+static struct iommufd_hw_pagetable *do_attach(struct iommufd_device *idev,
struct iommufd_hw_pagetable *hwpt, struct attach_data *data)+{
- return data->attach_fn(idev, hwpt);
+}
I assume that this change was made because we need to pass the pasid value to the attach_fn() callback.
If so, how about passing it directly to attach_fn() function?
typedef struct iommufd_hw_pagetable *(*attach_fn)( struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt, ioasid_t pasid);
In no pasid case, use IOMMU_NO_PASID.
Best regards, baolu