| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |