1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef _ASM_POWERPC_PAPR_SYSPARM_H
3#define _ASM_POWERPC_PAPR_SYSPARM_H
4
5typedef struct {
6	const u32 token;
7} papr_sysparm_t;
8
9#define mk_papr_sysparm(x_) ((papr_sysparm_t){ .token = x_, })
10
11/*
12 * Derived from the "Defined Parameters" table in PAPR 7.3.16 System
13 * Parameters Option. Where the spec says "characteristics", we use
14 * "attrs" in the symbolic names to keep them from getting too
15 * unwieldy.
16 */
17#define PAPR_SYSPARM_SHARED_PROC_LPAR_ATTRS        mk_papr_sysparm(20)
18#define PAPR_SYSPARM_PROC_MODULE_INFO              mk_papr_sysparm(43)
19#define PAPR_SYSPARM_COOP_MEM_OVERCOMMIT_ATTRS     mk_papr_sysparm(44)
20#define PAPR_SYSPARM_TLB_BLOCK_INVALIDATE_ATTRS    mk_papr_sysparm(50)
21#define PAPR_SYSPARM_LPAR_NAME                     mk_papr_sysparm(55)
22
23enum {
24	PAPR_SYSPARM_MAX_INPUT  = 1024,
25	PAPR_SYSPARM_MAX_OUTPUT = 4000,
26};
27
28struct papr_sysparm_buf {
29	__be16 len;
30	char val[PAPR_SYSPARM_MAX_OUTPUT];
31};
32
33struct papr_sysparm_buf *papr_sysparm_buf_alloc(void);
34void papr_sysparm_buf_free(struct papr_sysparm_buf *buf);
35int papr_sysparm_set(papr_sysparm_t param, const struct papr_sysparm_buf *buf);
36int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf);
37
38#endif /* _ASM_POWERPC_PAPR_SYSPARM_H */
39