1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __UM_SEGMENT_H
3 #define __UM_SEGMENT_H
4
5 extern int host_gdt_entry_tls_min;
6
7 #define GDT_ENTRY_TLS_ENTRIES 3
8 #define GDT_ENTRY_TLS_MIN host_gdt_entry_tls_min
9 #define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
10
11 typedef struct {
12 unsigned long seg;
13 } mm_segment_t;
14
15 #define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
16 #define KERNEL_DS MAKE_MM_SEG(~0UL)
17 #define USER_DS MAKE_MM_SEG(TASK_SIZE)
18
19 #endif