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Diffstat (limited to 'arch/s390/include/asm/cpcmd.h')
| -rw-r--r-- | arch/s390/include/asm/cpcmd.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cpcmd.h b/arch/s390/include/asm/cpcmd.h new file mode 100644 index 000000000..3dfadb5d6 --- /dev/null +++ b/arch/s390/include/asm/cpcmd.h @@ -0,0 +1,32 @@ +/* + * S390 version + * Copyright IBM Corp. 1999 + * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), + * Christian Borntraeger (cborntra@de.ibm.com), + */ + +#ifndef _ASM_S390_CPCMD_H +#define _ASM_S390_CPCMD_H + +/* + * 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); + +/* + * 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 /* _ASM_S390_CPCMD_H */ |