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| 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/hypfs.h | |
| 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/hypfs.h')
| -rw-r--r-- | arch/s390/hypfs/hypfs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/hypfs/hypfs.h b/arch/s390/hypfs/hypfs.h index b34b5ab90a31..36d093fa9fb3 100644 --- a/arch/s390/hypfs/hypfs.h +++ b/arch/s390/hypfs/hypfs.h @@ -37,6 +37,10 @@ extern int hypfs_vm_init(void); extern void hypfs_vm_exit(void); extern int hypfs_vm_create_files(struct dentry *root); +/* VM diagnose 0c */ +int hypfs_diag0c_init(void); +void hypfs_diag0c_exit(void); + /* Set Partition-Resource Parameter */ int hypfs_sprp_init(void); void hypfs_sprp_exit(void); |