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author | Christian Borntraeger <cborntra@de.ibm.com> | 2005-06-25 14:55:32 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:37 -0700 |
commit | 6b979de395c7e1b7e59f74a870e1d1911853eccb (patch) | |
tree | 82502e9e93c977b0f812d017f5d8d4e12436c6c8 /drivers/s390/char/vmcp.h | |
parent | 77fa22450de00d535de2cc8be653983560828000 (diff) | |
download | blackbird-op-linux-6b979de395c7e1b7e59f74a870e1d1911853eccb.tar.gz blackbird-op-linux-6b979de395c7e1b7e59f74a870e1d1911853eccb.zip |
[PATCH] s390: add vmcp interface
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>
Diffstat (limited to 'drivers/s390/char/vmcp.h')
-rw-r--r-- | drivers/s390/char/vmcp.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/s390/char/vmcp.h b/drivers/s390/char/vmcp.h new file mode 100644 index 000000000000..87389e730465 --- /dev/null +++ b/drivers/s390/char/vmcp.h @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2004, 2005 IBM Corporation + * Interface implementation for communication with the v/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 <asm/semaphore.h> +#include <linux/ioctl.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 semaphore mutex; +}; |