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>
This commit is contained in:
parent
45cce4ccaf
commit
34c0dad752
|
@ -5,3 +5,4 @@
|
||||||
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
|
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
|
||||||
|
|
||||||
s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o hypfs_sprp.o
|
s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o hypfs_sprp.o
|
||||||
|
s390_hypfs-objs += hypfs_diag0c.o
|
||||||
|
|
|
@ -37,6 +37,10 @@ extern int hypfs_vm_init(void);
|
||||||
extern void hypfs_vm_exit(void);
|
extern void hypfs_vm_exit(void);
|
||||||
extern int hypfs_vm_create_files(struct dentry *root);
|
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 */
|
/* Set Partition-Resource Parameter */
|
||||||
int hypfs_sprp_init(void);
|
int hypfs_sprp_init(void);
|
||||||
void hypfs_sprp_exit(void);
|
void hypfs_sprp_exit(void);
|
||||||
|
|
|
@ -0,0 +1,139 @@
|
||||||
|
/*
|
||||||
|
* Hypervisor filesystem for Linux on s390
|
||||||
|
*
|
||||||
|
* Diag 0C implementation
|
||||||
|
*
|
||||||
|
* Copyright IBM Corp. 2014
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/slab.h>
|
||||||
|
#include <linux/cpu.h>
|
||||||
|
#include <asm/hypfs.h>
|
||||||
|
#include "hypfs.h"
|
||||||
|
|
||||||
|
#define DBFS_D0C_HDR_VERSION 0
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Execute diagnose 0c in 31 bit mode
|
||||||
|
*/
|
||||||
|
static void diag0c(struct hypfs_diag0c_entry *entry)
|
||||||
|
{
|
||||||
|
asm volatile (
|
||||||
|
#ifdef CONFIG_64BIT
|
||||||
|
" sam31\n"
|
||||||
|
" diag %0,%0,0x0c\n"
|
||||||
|
" sam64\n"
|
||||||
|
#else
|
||||||
|
" diag %0,%0,0x0c\n"
|
||||||
|
#endif
|
||||||
|
: /* no output register */
|
||||||
|
: "a" (entry)
|
||||||
|
: "memory");
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Get hypfs_diag0c_entry from CPU vector and store diag0c data
|
||||||
|
*/
|
||||||
|
static void diag0c_fn(void *data)
|
||||||
|
{
|
||||||
|
diag0c(((void **) data)[smp_processor_id()]);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Allocate buffer and store diag 0c data
|
||||||
|
*/
|
||||||
|
static void *diag0c_store(unsigned int *count)
|
||||||
|
{
|
||||||
|
struct hypfs_diag0c_data *diag0c_data;
|
||||||
|
unsigned int cpu_count, cpu, i;
|
||||||
|
void **cpu_vec;
|
||||||
|
|
||||||
|
get_online_cpus();
|
||||||
|
cpu_count = num_online_cpus();
|
||||||
|
cpu_vec = kmalloc(sizeof(*cpu_vec) * num_possible_cpus(), GFP_KERNEL);
|
||||||
|
if (!cpu_vec)
|
||||||
|
goto fail_put_online_cpus;
|
||||||
|
/* Note: Diag 0c needs 8 byte alignment and real storage */
|
||||||
|
diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) +
|
||||||
|
cpu_count * sizeof(struct hypfs_diag0c_entry),
|
||||||
|
GFP_KERNEL | GFP_DMA);
|
||||||
|
if (!diag0c_data)
|
||||||
|
goto fail_kfree_cpu_vec;
|
||||||
|
i = 0;
|
||||||
|
/* Fill CPU vector for each online CPU */
|
||||||
|
for_each_online_cpu(cpu) {
|
||||||
|
diag0c_data->entry[i].cpu = cpu;
|
||||||
|
cpu_vec[cpu] = &diag0c_data->entry[i++];
|
||||||
|
}
|
||||||
|
/* Collect data all CPUs */
|
||||||
|
on_each_cpu(diag0c_fn, cpu_vec, 1);
|
||||||
|
*count = cpu_count;
|
||||||
|
kfree(cpu_vec);
|
||||||
|
put_online_cpus();
|
||||||
|
return diag0c_data;
|
||||||
|
|
||||||
|
fail_kfree_cpu_vec:
|
||||||
|
kfree(cpu_vec);
|
||||||
|
fail_put_online_cpus:
|
||||||
|
put_online_cpus();
|
||||||
|
return ERR_PTR(-ENOMEM);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Hypfs DBFS callback: Free diag 0c data
|
||||||
|
*/
|
||||||
|
static void dbfs_diag0c_free(const void *data)
|
||||||
|
{
|
||||||
|
kfree(data);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Hypfs DBFS callback: Create diag 0c data
|
||||||
|
*/
|
||||||
|
static int dbfs_diag0c_create(void **data, void **data_free_ptr, size_t *size)
|
||||||
|
{
|
||||||
|
struct hypfs_diag0c_data *diag0c_data;
|
||||||
|
unsigned int count;
|
||||||
|
|
||||||
|
diag0c_data = diag0c_store(&count);
|
||||||
|
if (IS_ERR(diag0c_data))
|
||||||
|
return PTR_ERR(diag0c_data);
|
||||||
|
memset(&diag0c_data->hdr, 0, sizeof(diag0c_data->hdr));
|
||||||
|
get_tod_clock_ext(diag0c_data->hdr.tod_ext);
|
||||||
|
diag0c_data->hdr.len = count * sizeof(struct hypfs_diag0c_entry);
|
||||||
|
diag0c_data->hdr.version = DBFS_D0C_HDR_VERSION;
|
||||||
|
diag0c_data->hdr.count = count;
|
||||||
|
*data = diag0c_data;
|
||||||
|
*data_free_ptr = diag0c_data;
|
||||||
|
*size = diag0c_data->hdr.len + sizeof(struct hypfs_diag0c_hdr);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Hypfs DBFS file structure
|
||||||
|
*/
|
||||||
|
static struct hypfs_dbfs_file dbfs_file_0c = {
|
||||||
|
.name = "diag_0c",
|
||||||
|
.data_create = dbfs_diag0c_create,
|
||||||
|
.data_free = dbfs_diag0c_free,
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Initialize diag 0c interface for z/VM
|
||||||
|
*/
|
||||||
|
int __init hypfs_diag0c_init(void)
|
||||||
|
{
|
||||||
|
if (!MACHINE_IS_VM)
|
||||||
|
return 0;
|
||||||
|
return hypfs_dbfs_create_file(&dbfs_file_0c);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Shutdown diag 0c interface for z/VM
|
||||||
|
*/
|
||||||
|
void hypfs_diag0c_exit(void)
|
||||||
|
{
|
||||||
|
if (!MACHINE_IS_VM)
|
||||||
|
return;
|
||||||
|
hypfs_dbfs_remove_file(&dbfs_file_0c);
|
||||||
|
}
|
|
@ -482,10 +482,14 @@ static int __init hypfs_init(void)
|
||||||
rc = -ENODATA;
|
rc = -ENODATA;
|
||||||
goto fail_hypfs_vm_exit;
|
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);
|
s390_kobj = kobject_create_and_add("s390", hypervisor_kobj);
|
||||||
if (!s390_kobj) {
|
if (!s390_kobj) {
|
||||||
rc = -ENOMEM;
|
rc = -ENOMEM;
|
||||||
goto fail_hypfs_sprp_exit;
|
goto fail_hypfs_diag0c_exit;
|
||||||
}
|
}
|
||||||
rc = register_filesystem(&hypfs_type);
|
rc = register_filesystem(&hypfs_type);
|
||||||
if (rc)
|
if (rc)
|
||||||
|
@ -494,6 +498,8 @@ static int __init hypfs_init(void)
|
||||||
|
|
||||||
fail_filesystem:
|
fail_filesystem:
|
||||||
kobject_put(s390_kobj);
|
kobject_put(s390_kobj);
|
||||||
|
fail_hypfs_diag0c_exit:
|
||||||
|
hypfs_diag0c_exit();
|
||||||
fail_hypfs_sprp_exit:
|
fail_hypfs_sprp_exit:
|
||||||
hypfs_sprp_exit();
|
hypfs_sprp_exit();
|
||||||
fail_hypfs_vm_exit:
|
fail_hypfs_vm_exit:
|
||||||
|
@ -510,6 +516,7 @@ static void __exit hypfs_exit(void)
|
||||||
{
|
{
|
||||||
unregister_filesystem(&hypfs_type);
|
unregister_filesystem(&hypfs_type);
|
||||||
kobject_put(s390_kobj);
|
kobject_put(s390_kobj);
|
||||||
|
hypfs_diag0c_exit();
|
||||||
hypfs_sprp_exit();
|
hypfs_sprp_exit();
|
||||||
hypfs_vm_exit();
|
hypfs_vm_exit();
|
||||||
hypfs_diag_exit();
|
hypfs_diag_exit();
|
||||||
|
|
|
@ -1,16 +1,19 @@
|
||||||
/*
|
/*
|
||||||
* IOCTL interface for hypfs
|
* Structures for hypfs interface
|
||||||
*
|
*
|
||||||
* Copyright IBM Corp. 2013
|
* Copyright IBM Corp. 2013
|
||||||
*
|
*
|
||||||
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#ifndef _ASM_HYPFS_CTL_H
|
#ifndef _ASM_HYPFS_H
|
||||||
#define _ASM_HYPFS_CTL_H
|
#define _ASM_HYPFS_H
|
||||||
|
|
||||||
#include <linux/types.h>
|
#include <linux/types.h>
|
||||||
|
|
||||||
|
/*
|
||||||
|
* IOCTL for binary interface /sys/kernel/debug/diag_304
|
||||||
|
*/
|
||||||
struct hypfs_diag304 {
|
struct hypfs_diag304 {
|
||||||
__u32 args[2];
|
__u32 args[2];
|
||||||
__u64 data;
|
__u64 data;
|
||||||
|
@ -22,4 +25,30 @@ struct hypfs_diag304 {
|
||||||
#define HYPFS_DIAG304 \
|
#define HYPFS_DIAG304 \
|
||||||
_IOWR(HYPFS_IOCTL_MAGIC, 0x20, struct 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
|
#endif
|
||||||
|
|
Loading…
Reference in New Issue