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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef _ASM_POWERPC_PAPR_SYSPARM_H
3#define _ASM_POWERPC_PAPR_SYSPARM_H
4
5#include <uapi/asm/papr-sysparm.h>
6
7typedef struct {
8 u32 token;
9} papr_sysparm_t;
10
11#define mk_papr_sysparm(x_) ((papr_sysparm_t){ .token = x_, })
12
13/*
14 * Derived from the "Defined Parameters" table in PAPR 7.3.16 System
15 * Parameters Option. Where the spec says "characteristics", we use
16 * "attrs" in the symbolic names to keep them from getting too
17 * unwieldy.
18 */
19#define PAPR_SYSPARM_SHARED_PROC_LPAR_ATTRS mk_papr_sysparm(20)
20#define PAPR_SYSPARM_PROC_MODULE_INFO mk_papr_sysparm(43)
21#define PAPR_SYSPARM_COOP_MEM_OVERCOMMIT_ATTRS mk_papr_sysparm(44)
22#define PAPR_SYSPARM_TLB_BLOCK_INVALIDATE_ATTRS mk_papr_sysparm(50)
23#define PAPR_SYSPARM_LPAR_NAME mk_papr_sysparm(55)
24
25/**
26 * struct papr_sysparm_buf - RTAS work area layout for system parameter functions.
27 *
28 * This is the memory layout of the buffers passed to/from
29 * ibm,get-system-parameter and ibm,set-system-parameter. It is
30 * distinct from the papr_sysparm_io_block structure that is passed
31 * between user space and the kernel.
32 */
33struct papr_sysparm_buf {
34 __be16 len;
35 char val[PAPR_SYSPARM_MAX_OUTPUT];
36};
37
38struct papr_sysparm_buf *papr_sysparm_buf_alloc(void);
39void papr_sysparm_buf_free(struct papr_sysparm_buf *buf);
40int papr_sysparm_set(papr_sysparm_t param, const struct papr_sysparm_buf *buf);
41int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf);
42
43#endif /* _ASM_POWERPC_PAPR_SYSPARM_H */