papr-sysparm.h

 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#define PAPR_SYSPARM_HVPIPE_ENABLE                 mk_papr_sysparm(64)
25
26/**
27 * struct papr_sysparm_buf - RTAS work area layout for system parameter functions.
28 *
29 * This is the memory layout of the buffers passed to/from
30 * ibm,get-system-parameter and ibm,set-system-parameter. It is
31 * distinct from the papr_sysparm_io_block structure that is passed
32 * between user space and the kernel.
33 */
34struct papr_sysparm_buf {
35	__be16 len;
36	u8 val[PAPR_SYSPARM_MAX_OUTPUT];
37};
38
39struct papr_sysparm_buf *papr_sysparm_buf_alloc(void);
40void papr_sysparm_buf_free(struct papr_sysparm_buf *buf);
41int papr_sysparm_set(papr_sysparm_t param, const struct papr_sysparm_buf *buf);
42int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf);
43
44#endif /* _ASM_POWERPC_PAPR_SYSPARM_H */