blob: 1fcf65be7a230cbc91caa153cb97dfe900ac1b82 [file] [log] [blame]
* arch/s390/kernel/cpcmd.h
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Schwidefsky (,
* Christian Borntraeger (,
#ifndef __CPCMD__
#define __CPCMD__
* the lowlevel function for cpcmd
* the caller of __cpcmd has to ensure that the response buffer is below 2 GB
extern int __cpcmd(const char *cmd, char *response, int rlen, int *response_code);
#ifndef __s390x__
#define cpcmd __cpcmd
* cpcmd is the in-kernel interface for issuing CP commands
* cmd: null-terminated command string, max 240 characters
* response: response buffer for VM's textual response
* rlen: size of the response buffer, cpcmd will not exceed this size
* but will cap the output, if its too large. Everything that
* did not fit into the buffer will be silently dropped
* response_code: return pointer for VM's error code
* return value: the size of the response. The caller can check if the buffer
* was large enough by comparing the return value and rlen
* NOTE: If the response buffer is not below 2 GB, cpcmd can sleep
extern int cpcmd(const char *cmd, char *response, int rlen, int *response_code);
#endif /*__s390x__*/