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s390/hypfs: Add diagnose 0c support

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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>
This commit is contained in:
Michael Holzheu
2015-02-09 14:49:10 +01:00
committed by Martin Schwidefsky
parent 45cce4ccaf
commit 34c0dad752
5 changed files with 184 additions and 4 deletions
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4
arch/s390/hypfs/hypfs.h
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@@ -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);