From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Cc: holzheu@de.ibm.com
Subject: [S390] Hypervisor filesystem (s390_hypfs) for z/VM
Date: Fri, 26 Jan 2007 17:55:58 +0100 [thread overview]
Message-ID: <20070126165558.GA11609@skybase> (raw)
From: Michael Holzheu <holzheu@de.ibm.com>
[S390] Hypervisor filesystem (s390_hypfs) for z/VM
This is an extension of the already existing hypfs for LPAR (DIAG 204).
Data returned by DIAG 2fc is exported using the s390_hypfs when Linux
is running under z/VM. Information about cpus and memory is provided.
Data is put into different virtual files which can be accessed from user
space. All values are represented as ASCII strings
Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/hypfs/Makefile | 2
arch/s390/hypfs/hypfs.h | 9 +
arch/s390/hypfs/hypfs_diag.h | 16 --
arch/s390/hypfs/hypfs_vm.c | 231 +++++++++++++++++++++++++++++++++++++++++++
arch/s390/hypfs/inode.c | 31 +++--
5 files changed, 262 insertions(+), 27 deletions(-)
diff -urpN linux-2.6/arch/s390/hypfs/hypfs_diag.h linux-2.6-patched/arch/s390/hypfs/hypfs_diag.h
--- linux-2.6/arch/s390/hypfs/hypfs_diag.h 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/hypfs_diag.h 1970-01-01 01:00:00.000000000 +0100
@@ -1,16 +0,0 @@
-/*
- * arch/s390/hypfs_diag.h
- * Hypervisor filesystem for Linux on s390.
- *
- * Copyright (C) IBM Corp. 2006
- * Author(s): Michael Holzheu <holzheu@de.ibm.com>
- */
-
-#ifndef _HYPFS_DIAG_H_
-#define _HYPFS_DIAG_H_
-
-extern int hypfs_diag_init(void);
-extern void hypfs_diag_exit(void);
-extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
-
-#endif /* _HYPFS_DIAG_H_ */
diff -urpN linux-2.6/arch/s390/hypfs/hypfs.h linux-2.6-patched/arch/s390/hypfs/hypfs.h
--- linux-2.6/arch/s390/hypfs/hypfs.h 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/hypfs.h 2007-01-26 17:29:36.000000000 +0100
@@ -27,4 +27,13 @@ extern struct dentry *hypfs_create_str(s
struct dentry *dir, const char *name,
char *string);
+/* LPAR Hypervisor */
+extern int hypfs_diag_init(void);
+extern void hypfs_diag_exit(void);
+extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
+
+/* VM Hypervisor */
+extern int hypfs_vm_init(void);
+extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
+
#endif /* _HYPFS_H_ */
diff -urpN linux-2.6/arch/s390/hypfs/hypfs_vm.c linux-2.6-patched/arch/s390/hypfs/hypfs_vm.c
--- linux-2.6/arch/s390/hypfs/hypfs_vm.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/hypfs_vm.c 2007-01-26 17:29:36.000000000 +0100
@@ -0,0 +1,231 @@
+/*
+ * Hypervisor filesystem for Linux on s390. z/VM implementation.
+ *
+ * Copyright (C) IBM Corp. 2006
+ * Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+#include <asm/ebcdic.h>
+#include "hypfs.h"
+
+#define NAME_LEN 8
+
+static char local_guest[] = " ";
+static char all_guests[] = "* ";
+static char *guest_query;
+
+struct diag2fc_data {
+ __u32 version;
+ __u32 flags;
+ __u64 used_cpu;
+ __u64 el_time;
+ __u64 mem_min_kb;
+ __u64 mem_max_kb;
+ __u64 mem_share_kb;
+ __u64 mem_used_kb;
+ __u32 pcpus;
+ __u32 lcpus;
+ __u32 vcpus;
+ __u32 cpu_min;
+ __u32 cpu_max;
+ __u32 cpu_shares;
+ __u32 cpu_use_samp;
+ __u32 cpu_delay_samp;
+ __u32 page_wait_samp;
+ __u32 idle_samp;
+ __u32 other_samp;
+ __u32 total_samp;
+ char guest_name[NAME_LEN];
+};
+
+struct diag2fc_parm_list {
+ char userid[NAME_LEN];
+ char aci_grp[NAME_LEN];
+ __u64 addr;
+ __u32 size;
+ __u32 fmt;
+};
+
+static int diag2fc(int size, char* query, void *addr)
+{
+ unsigned long residual_cnt;
+ unsigned long rc;
+ struct diag2fc_parm_list parm_list;
+
+ memcpy(parm_list.userid, query, NAME_LEN);
+ ASCEBC(parm_list.userid, NAME_LEN);
+ parm_list.addr = (unsigned long) addr ;
+ parm_list.size = size;
+ parm_list.fmt = 0x02;
+ memset(parm_list.aci_grp, 0x40, NAME_LEN);
+ rc = -1;
+
+ asm volatile(
+ " diag %0,%1,0x2fc\n"
+ "0:\n"
+ EX_TABLE(0b,0b)
+ : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory");
+
+ if ((rc != 0 ) && (rc != -2))
+ return rc;
+ else
+ return -residual_cnt;
+}
+
+static struct diag2fc_data *diag2fc_store(char *query, int *count)
+{
+ int size;
+ struct diag2fc_data *data;
+
+ do {
+ size = diag2fc(0, query, NULL);
+ if (size < 0)
+ return ERR_PTR(-EACCES);
+ data = vmalloc(size);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+ if (diag2fc(size, query, data) == 0)
+ break;
+ vfree(data);
+ } while (1);
+ *count = (size / sizeof(*data));
+
+ return data;
+}
+
+static void diag2fc_free(void *data)
+{
+ vfree(data);
+}
+
+#define ATTRIBUTE(sb, dir, name, member) \
+do { \
+ void *rc; \
+ rc = hypfs_create_u64(sb, dir, name, member); \
+ if (IS_ERR(rc)) \
+ return PTR_ERR(rc); \
+} while(0)
+
+static int hpyfs_vm_create_guest(struct super_block *sb,
+ struct dentry *systems_dir,
+ struct diag2fc_data *data)
+{
+ char guest_name[NAME_LEN + 1] = {};
+ struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir;
+ int dedicated_flag, capped_value;
+
+ capped_value = (data->flags & 0x00000006) >> 1;
+ dedicated_flag = (data->flags & 0x00000008) >> 3;
+
+ /* guest dir */
+ memcpy(guest_name, data->guest_name, NAME_LEN);
+ EBCASC(guest_name, NAME_LEN);
+ strstrip(guest_name);
+ guest_dir = hypfs_mkdir(sb, systems_dir, guest_name);
+ if (IS_ERR(guest_dir))
+ return PTR_ERR(guest_dir);
+ ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time);
+
+ /* logical cpu information */
+ cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus");
+ if (IS_ERR(cpus_dir))
+ return PTR_ERR(cpus_dir);
+ ATTRIBUTE(sb, cpus_dir, "cputime_us", data->used_cpu);
+ ATTRIBUTE(sb, cpus_dir, "capped", capped_value);
+ ATTRIBUTE(sb, cpus_dir, "dedicated", dedicated_flag);
+ ATTRIBUTE(sb, cpus_dir, "count", data->vcpus);
+ ATTRIBUTE(sb, cpus_dir, "weight_min", data->cpu_min);
+ ATTRIBUTE(sb, cpus_dir, "weight_max", data->cpu_max);
+ ATTRIBUTE(sb, cpus_dir, "weight_cur", data->cpu_shares);
+
+ /* memory information */
+ mem_dir = hypfs_mkdir(sb, guest_dir, "mem");
+ if (IS_ERR(mem_dir))
+ return PTR_ERR(mem_dir);
+ ATTRIBUTE(sb, mem_dir, "min_KiB", data->mem_min_kb);
+ ATTRIBUTE(sb, mem_dir, "max_KiB", data->mem_max_kb);
+ ATTRIBUTE(sb, mem_dir, "used_KiB", data->mem_used_kb);
+ ATTRIBUTE(sb, mem_dir, "share_KiB", data->mem_share_kb);
+
+ /* samples */
+ samples_dir = hypfs_mkdir(sb, guest_dir, "samples");
+ if (IS_ERR(samples_dir))
+ return PTR_ERR(samples_dir);
+ ATTRIBUTE(sb, samples_dir, "cpu_using", data->cpu_use_samp);
+ ATTRIBUTE(sb, samples_dir, "cpu_delay", data->cpu_delay_samp);
+ ATTRIBUTE(sb, samples_dir, "mem_delay", data->page_wait_samp);
+ ATTRIBUTE(sb, samples_dir, "idle", data->idle_samp);
+ ATTRIBUTE(sb, samples_dir, "other", data->other_samp);
+ ATTRIBUTE(sb, samples_dir, "total", data->total_samp);
+ return 0;
+}
+
+int hypfs_vm_create_files(struct super_block *sb, struct dentry *root)
+{
+ struct dentry *dir, *file;
+ struct diag2fc_data *data;
+ int rc, i, count = 0;
+
+ data = diag2fc_store(guest_query, &count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ /* Hpervisor Info */
+ dir = hypfs_mkdir(sb, root, "hyp");
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ goto failed;
+ }
+ file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor");
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ goto failed;
+ }
+
+ /* physical cpus */
+ dir = hypfs_mkdir(sb, root, "cpus");
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ goto failed;
+ }
+ file = hypfs_create_u64(sb, dir, "count", data->lcpus);
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ goto failed;
+ }
+
+ /* guests */
+ dir = hypfs_mkdir(sb, root, "systems");
+ if (IS_ERR(dir)) {
+ rc = PTR_ERR(dir);
+ goto failed;
+ }
+
+ for (i = 0; i < count; i++) {
+ rc = hpyfs_vm_create_guest(sb, dir, &(data[i]));
+ if (rc)
+ goto failed;
+ }
+ diag2fc_free(data);
+ return 0;
+
+failed:
+ diag2fc_free(data);
+ return rc;
+}
+
+int hypfs_vm_init(void)
+{
+ if (diag2fc(0, all_guests, NULL) > 0)
+ guest_query = all_guests;
+ else if (diag2fc(0, local_guest, NULL) > 0)
+ guest_query = local_guest;
+ else
+ return -EACCES;
+
+ return 0;
+}
diff -urpN linux-2.6/arch/s390/hypfs/inode.c linux-2.6-patched/arch/s390/hypfs/inode.c
--- linux-2.6/arch/s390/hypfs/inode.c 2007-01-26 17:27:27.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/inode.c 2007-01-26 17:29:36.000000000 +0100
@@ -19,7 +19,6 @@
#include <linux/module.h>
#include <asm/ebcdic.h>
#include "hypfs.h"
-#include "hypfs_diag.h"
#define HYPFS_MAGIC 0x687970 /* ASCII 'hyp' */
#define TMP_SIZE 64 /* size of temporary buffers */
@@ -192,7 +191,10 @@ static ssize_t hypfs_aio_write(struct ki
goto out;
}
hypfs_delete_tree(sb->s_root);
- rc = hypfs_diag_create_files(sb, sb->s_root);
+ if (MACHINE_IS_VM)
+ rc = hypfs_vm_create_files(sb, sb->s_root);
+ else
+ rc = hypfs_diag_create_files(sb, sb->s_root);
if (rc) {
printk(KERN_ERR "hypfs: Update failed\n");
hypfs_delete_tree(sb->s_root);
@@ -289,7 +291,10 @@ static int hypfs_fill_super(struct super
rc = -ENOMEM;
goto err_alloc;
}
- rc = hypfs_diag_create_files(sb, root_dentry);
+ if (MACHINE_IS_VM)
+ rc = hypfs_vm_create_files(sb, root_dentry);
+ else
+ rc = hypfs_diag_create_files(sb, root_dentry);
if (rc)
goto err_tree;
sbi->update_file = hypfs_create_update_file(sb, root_dentry);
@@ -462,11 +467,15 @@ static int __init hypfs_init(void)
{
int rc;
- if (MACHINE_IS_VM)
- return -ENODATA;
- if (hypfs_diag_init()) {
- rc = -ENODATA;
- goto fail_diag;
+ if (MACHINE_IS_VM) {
+ if (hypfs_vm_init())
+ /* no diag 2fc, just exit */
+ return -ENODATA;
+ } else {
+ if (hypfs_diag_init()) {
+ rc = -ENODATA;
+ goto fail_diag;
+ }
}
kset_set_kset_s(&s390_subsys, hypervisor_subsys);
rc = subsystem_register(&s390_subsys);
@@ -480,7 +489,8 @@ static int __init hypfs_init(void)
fail_filesystem:
subsystem_unregister(&s390_subsys);
fail_sysfs:
- hypfs_diag_exit();
+ if (!MACHINE_IS_VM)
+ hypfs_diag_exit();
fail_diag:
printk(KERN_ERR "hypfs: Initialization failed with rc = %i.\n", rc);
return rc;
@@ -488,7 +498,8 @@ fail_diag:
static void __exit hypfs_exit(void)
{
- hypfs_diag_exit();
+ if (!MACHINE_IS_VM)
+ hypfs_diag_exit();
unregister_filesystem(&hypfs_type);
subsystem_unregister(&s390_subsys);
}
diff -urpN linux-2.6/arch/s390/hypfs/Makefile linux-2.6-patched/arch/s390/hypfs/Makefile
--- linux-2.6/arch/s390/hypfs/Makefile 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/hypfs/Makefile 2007-01-26 17:29:36.000000000 +0100
@@ -4,4 +4,4 @@
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
-s390_hypfs-objs := inode.o hypfs_diag.o
+s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o
reply other threads:[~2007-01-26 16:56 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070126165558.GA11609@skybase \
--to=schwidefsky@de.ibm.com \
--cc=holzheu@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.