mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
6b979de395
Add interface to issue VM control program commands. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/*
|
|
* arch/s390/kernel/cpcmd.h
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
|
|
* Christian Borntraeger (cborntra@de.ibm.com),
|
|
*/
|
|
|
|
#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
|
|
#else
|
|
/*
|
|
* 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__*/
|
|
|
|
#endif
|