free_pages_exact(list, get_pages_list_size(num_entries));
}
+static bool is_normal_memory(pgprot_t p)
+{
+#if defined(CONFIG_ARM)
+ return (pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC;
+#elif defined(CONFIG_ARM64)
+ return (pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL);
+#else
+#error "Unuspported architecture"
+#endif
+}
+
+static int __check_mem_type(struct vm_area_struct *vma, unsigned long end)
+{
+ while (vma && is_normal_memory(vma->vm_page_prot)) {
+ if (vma->vm_end >= end)
+ return 0;
+ vma = vma->vm_next;
+ }
+
+ return -EINVAL;
+}
+
+static int check_mem_type(unsigned long start, size_t num_pages)
+{
+ struct mm_struct *mm = current->mm;
+ int rc;
+
+ down_read(&mm->mmap_sem);
+ rc = __check_mem_type(find_vma(mm, start),
+ start + num_pages * PAGE_SIZE);
+ up_read(&mm->mmap_sem);
+
+ return rc;
+}
+
int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
struct page **pages, size_t num_pages,
unsigned long start)
struct optee_msg_arg *msg_arg;
u64 *pages_list;
phys_addr_t msg_parg;
- int rc = 0;
+ int rc;
if (!num_pages)
return -EINVAL;
+ rc = check_mem_type(start, num_pages);
+ if (rc)
+ return rc;
+
pages_list = optee_allocate_pages_list(num_pages);
if (!pages_list)
return -ENOMEM;
* We don't want to register supplicant memory in OP-TEE.
* Instead information about it will be passed in RPC code.
*/
- return 0;
+ return check_mem_type(start, num_pages);
}
int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm)