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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2015-02-09 16:49:10 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-02-10 18:38:58 +0300
commit34c0dad752294f373a0720840f59e186788ba227 (patch)
tree4d9da02c1edf8c5b4cf57016164747bfabd6faee /arch/s390/include/uapi/asm/hypfs.h
parent45cce4ccafe3cddc924ef5221d22b9853fc9a13c (diff)
downloadlinux-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/asm/hypfs.h')
-rw-r--r--arch/s390/include/uapi/asm/hypfs.h35
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 37998b449531..b3fe12d8dd87 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