diff options
| author |   Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2015-02-09 14:49:10 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-02-10 16:38:58 +0100 |
| commit | 34c0dad752294f373a0720840f59e186788ba227 (patch) | |
| tree | 4d9da02c1edf8c5b4cf57016164747bfabd6faee /arch/s390/hypfs/inode.c | |
| parent | s390/cacheinfo: don't use smp_processor_id() in preemptible context (diff) | |
| download | linux-dev-34c0dad752294f373a0720840f59e186788ba227.tar.xz linux-dev-34c0dad752294f373a0720840f59e186788ba227.zip | |
s390/hypfs: Add diagnose 0c support
With this feature, you can read the CPU performance metrics provided by the
z/VM diagnose 0C. This then allows to get the management time for each
online CPU of the guest where the diagnose is executed.
The new debugfs file /sys/kernel/debug/s390_hypfs/diag_0c exports the
diag0C binary data to user space via an open/read/close interface.
The binary data consists out of a header structure followed by an
array that contains the diagnose 0c data for each online CPU.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/hypfs/inode.c')
| -rw-r--r-- | arch/s390/hypfs/inode.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c index c952b981e4f2..4c8008dd938e 100644 --- a/arch/s390/hypfs/inode.c +++ b/arch/s390/hypfs/inode.c @@ -482,10 +482,14 @@ static int __init hypfs_init(void) rc = -ENODATA; goto fail_hypfs_vm_exit; } + if (hypfs_diag0c_init()) { + rc = -ENODATA; + goto fail_hypfs_sprp_exit; + } s390_kobj = kobject_create_and_add("s390", hypervisor_kobj); if (!s390_kobj) { rc = -ENOMEM; - goto fail_hypfs_sprp_exit; + goto fail_hypfs_diag0c_exit; } rc = register_filesystem(&hypfs_type); if (rc) @@ -494,6 +498,8 @@ static int __init hypfs_init(void) fail_filesystem: kobject_put(s390_kobj); +fail_hypfs_diag0c_exit: + hypfs_diag0c_exit(); fail_hypfs_sprp_exit: hypfs_sprp_exit(); fail_hypfs_vm_exit: @@ -510,6 +516,7 @@ static void __exit hypfs_exit(void) { unregister_filesystem(&hypfs_type); kobject_put(s390_kobj); + hypfs_diag0c_exit(); hypfs_sprp_exit(); hypfs_vm_exit(); hypfs_diag_exit(); |