xref: /openbmc/linux/arch/s390/include/asm/cpcmd.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *  S390 version
4  *    Copyright IBM Corp. 1999
5  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
6  *               Christian Borntraeger (cborntra@de.ibm.com),
7  */
8 
9 #ifndef _ASM_S390_CPCMD_H
10 #define _ASM_S390_CPCMD_H
11 
12 /*
13  * the lowlevel function for cpcmd
14  */
15 int __cpcmd(const char *cmd, char *response, int rlen, int *response_code);
16 
17 /*
18  * cpcmd is the in-kernel interface for issuing CP commands
19  *
20  * cmd:		null-terminated command string, max 240 characters
21  * response:	response buffer for VM's textual response
22  * rlen:	size of the response buffer, cpcmd will not exceed this size
23  *		but will cap the output, if its too large. Everything that
24  *		did not fit into the buffer will be silently dropped
25  * response_code: return pointer for VM's error code
26  * return value: the size of the response. The caller can check if the buffer
27  *		was large enough by comparing the return value and rlen
28  * NOTE: If the response buffer is not in real storage, cpcmd can sleep
29  */
30 int cpcmd(const char *cmd, char *response, int rlen, int *response_code);
31 
32 #endif /* _ASM_S390_CPCMD_H */
33