diff options
| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2015-02-09 13:49:10 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-02-10 15:38:58 (GMT) |
| commit | 34c0dad752294f373a0720840f59e186788ba227 (patch) | |
| tree | 4d9da02c1edf8c5b4cf57016164747bfabd6faee /arch/s390/include/uapi | |
| parent | 45cce4ccafe3cddc924ef5221d22b9853fc9a13c (diff) | |
| download | linux-34c0dad752294f373a0720840f59e186788ba227.tar.xz | |
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/include/uapi')
| -rw-r--r-- | arch/s390/include/uapi/asm/hypfs.h | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/arch/s390/include/uapi/asm/hypfs.h b/arch/s390/include/uapi/asm/hypfs.h index 37998b4..b3fe12d 100644 --- a/arch/s390/include/uapi/asm/hypfs.h +++ b/arch/s390/include/uapi/asm/hypfs.h @@ -1,16 +1,19 @@ /* - * IOCTL interface for hypfs + * Structures for hypfs interface * * Copyright IBM Corp. 2013 * * Author: Martin Schwidefsky <schwidefsky@de.ibm.com> */ -#ifndef _ASM_HYPFS_CTL_H -#define _ASM_HYPFS_CTL_H +#ifndef _ASM_HYPFS_H +#define _ASM_HYPFS_H #include <linux/types.h> +/* + * IOCTL for binary interface /sys/kernel/debug/diag_304 + */ struct hypfs_diag304 { __u32 args[2]; __u64 data; @@ -22,4 +25,30 @@ struct hypfs_diag304 { #define HYPFS_DIAG304 \ _IOWR(HYPFS_IOCTL_MAGIC, 0x20, struct hypfs_diag304) +/* + * Structures for binary interface /sys/kernel/debug/diag_0c + */ +struct hypfs_diag0c_hdr { + __u64 len; /* Length of diag0c buffer without header */ + __u16 version; /* Version of header */ + char reserved1[6]; /* Reserved */ + char tod_ext[16]; /* TOD clock for diag0c */ + __u64 count; /* Number of entries (CPUs) in diag0c array */ + char reserved2[24]; /* Reserved */ +}; + +struct hypfs_diag0c_entry { + char date[8]; /* MM/DD/YY in EBCDIC */ + char time[8]; /* HH:MM:SS in EBCDIC */ + __u64 virtcpu; /* Virtual time consumed by the virt CPU (us) */ + __u64 totalproc; /* Total of virtual and simulation time (us) */ + __u32 cpu; /* Linux logical CPU number */ + __u32 reserved; /* Align to 8 byte */ +}; + +struct hypfs_diag0c_data { + struct hypfs_diag0c_hdr hdr; /* 64 byte header */ + struct hypfs_diag0c_entry entry[]; /* diag0c entry array */ +}; + #endif |