10 Oct
2023
10 Oct
'23
5:21 p.m.
On Thu, Sep 21, 2023 at 12:51:23AM -0700, Yi Liu wrote:
From: Lu Baolu baolu.lu@linux.intel.com
Introduce a new domain type for a user I/O page table, which is nested on top of another user space address represented by a UNMANAGED domain. The
Lets start using the world PAGING whenever you want to type UNMANAGED. I'm trying to get rid of UNMANAGED.
@@ -241,6 +245,21 @@ struct iommu_user_data { size_t len; }; +/**
- struct iommu_user_data_array - iommu driver specific user space data array
- @uptr: Pointer to the user buffer array for copy_from_user()
- @entry_len: The fixed-width length of a entry in the array, in bytes
- @entry_num: The number of total entries in the array
- A array having a @entry_num number of @entry_len sized entries, each entry is
- user space data, i.e. an uAPI that is defined in include/uapi/linux/iommufd.h
- */
+struct iommu_user_data_array {
- void __user *uptr;
- size_t entry_len;
- int entry_num;
+};
Ditto about iommu-driver.h for most of this stuff
/**
- iommu_copy_user_data - Copy iommu driver specific user space data
- @dst_data: Pointer to an iommu driver specific user data that is defined in
@@ -263,6 +282,34 @@ static inline int iommu_copy_user_data(void *dst_data, src_data->uptr, src_data->len); } +/**
- iommu_copy_user_data_from_array - Copy iommu driver specific user space data
from an iommu_user_data_array input
- @dst_data: Pointer to an iommu driver specific user data that is defined in
include/uapi/linux/iommufd.h
- @src_data: Pointer to a struct iommu_user_data_array for user space data array
- @index: Index to offset the location in the array to copy user data from
- @data_len: Length of current user data structure, i.e. sizeof(struct _dst)
- @min_len: Initial length of user data structure for backward compatibility.
This should be offsetofend using the last member in the user data
struct that was initially added to include/uapi/linux/iommufd.h- */
+static inline int +iommu_copy_user_data_from_array(void *dst_data,
const struct iommu_user_data_array *src_array,int index, size_t data_len, size_t min_len)
Index should be 'unsigned int'
Jason