1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _ASM_POWERPC_PAPR_SYSPARM_H
3 #define _ASM_POWERPC_PAPR_SYSPARM_H
4 
5 typedef 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 
23 enum {
24 	PAPR_SYSPARM_MAX_INPUT  = 1024,
25 	PAPR_SYSPARM_MAX_OUTPUT = 4000,
26 };
27 
28 struct papr_sysparm_buf {
29 	__be16 len;
30 	char val[PAPR_SYSPARM_MAX_OUTPUT];
31 };
32 
33 struct papr_sysparm_buf *papr_sysparm_buf_alloc(void);
34 void papr_sysparm_buf_free(struct papr_sysparm_buf *buf);
35 int papr_sysparm_set(papr_sysparm_t param, const struct papr_sysparm_buf *buf);
36 int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf);
37 
38 #endif /* _ASM_POWERPC_PAPR_SYSPARM_H */
39