/* * Copyright (C) 2004, 2005 IBM Corporation * Interface implementation for communication with the z/VM control program * Version 1.0 * Author(s): Christian Borntraeger <cborntra@de.ibm.com> * * * z/VMs CP offers the possibility to issue commands via the diagnose code 8 * this driver implements a character device that issues these commands and * returns the answer of CP. * * The idea of this driver is based on cpint from Neale Ferguson */ #include <linux/ioctl.h> #include <linux/mutex.h> #define VMCP_GETCODE _IOR(0x10, 1, int) #define VMCP_SETBUF _IOW(0x10, 2, int) #define VMCP_GETSIZE _IOR(0x10, 3, int) struct vmcp_session { unsigned int bufsize; char *response; int resp_size; int resp_code; /* As we use copy_from/to_user, which might * * sleep and cannot use a spinlock */ struct mutex mutex; };