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Diffstat (limited to 'arch/s390/hypfs/hypfs_vm.c')
-rw-r--r--arch/s390/hypfs/hypfs_vm.c144
1 files changed, 100 insertions, 44 deletions
diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index f0b0d31f0b4..32040ace00e 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -1,7 +1,7 @@
/*
* Hypervisor filesystem for Linux on s390. z/VM implementation.
*
- * Copyright (C) IBM Corp. 2006
+ * Copyright IBM Corp. 2006
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
@@ -10,9 +10,11 @@
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <asm/ebcdic.h>
+#include <asm/timex.h>
#include "hypfs.h"
#define NAME_LEN 8
+#define DBFS_D2FC_HDR_VERSION 0
static char local_guest[] = " ";
static char all_guests[] = "* ";
@@ -30,7 +32,7 @@ struct diag2fc_data {
__u32 pcpus;
__u32 lcpus;
__u32 vcpus;
- __u32 cpu_min;
+ __u32 ocpus;
__u32 cpu_max;
__u32 cpu_shares;
__u32 cpu_use_samp;
@@ -76,42 +78,44 @@ static int diag2fc(int size, char* query, void *addr)
return -residual_cnt;
}
-static struct diag2fc_data *diag2fc_store(char *query, int *count)
+/*
+ * Allocate buffer for "query" and store diag 2fc at "offset"
+ */
+static void *diag2fc_store(char *query, unsigned int *count, int offset)
{
+ void *data;
int size;
- struct diag2fc_data *data;
do {
size = diag2fc(0, query, NULL);
if (size < 0)
return ERR_PTR(-EACCES);
- data = vmalloc(size);
+ data = vmalloc(size + offset);
if (!data)
return ERR_PTR(-ENOMEM);
- if (diag2fc(size, query, data) == 0)
+ if (diag2fc(size, query, data + offset) == 0)
break;
vfree(data);
} while (1);
- *count = (size / sizeof(*data));
+ *count = (size / sizeof(struct diag2fc_data));
return data;
}
-static void diag2fc_free(void *data)
+static void diag2fc_free(const void *data)
{
vfree(data);
}
-#define ATTRIBUTE(sb, dir, name, member) \
+#define ATTRIBUTE(dir, name, member) \
do { \
void *rc; \
- rc = hypfs_create_u64(sb, dir, name, member); \
+ rc = hypfs_create_u64(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,
+static int hpyfs_vm_create_guest(struct dentry *systems_dir,
struct diag2fc_data *data)
{
char guest_name[NAME_LEN + 1] = {};
@@ -125,88 +129,94 @@ static int hpyfs_vm_create_guest(struct super_block *sb,
memcpy(guest_name, data->guest_name, NAME_LEN);
EBCASC(guest_name, NAME_LEN);
strim(guest_name);
- guest_dir = hypfs_mkdir(sb, systems_dir, guest_name);
+ guest_dir = hypfs_mkdir(systems_dir, guest_name);
if (IS_ERR(guest_dir))
return PTR_ERR(guest_dir);
- ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time);
+ ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time);
/* logical cpu information */
- cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus");
+ cpus_dir = hypfs_mkdir(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);
+ ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu);
+ ATTRIBUTE(cpus_dir, "capped", capped_value);
+ ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag);
+ ATTRIBUTE(cpus_dir, "count", data->vcpus);
+ /*
+ * Note: The "weight_min" attribute got the wrong name.
+ * The value represents the number of non-stopped (operating)
+ * CPUS.
+ */
+ ATTRIBUTE(cpus_dir, "weight_min", data->ocpus);
+ ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max);
+ ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares);
/* memory information */
- mem_dir = hypfs_mkdir(sb, guest_dir, "mem");
+ mem_dir = hypfs_mkdir(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);
+ ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb);
+ ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb);
+ ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb);
+ ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb);
/* samples */
- samples_dir = hypfs_mkdir(sb, guest_dir, "samples");
+ samples_dir = hypfs_mkdir(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);
+ ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp);
+ ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp);
+ ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp);
+ ATTRIBUTE(samples_dir, "idle", data->idle_samp);
+ ATTRIBUTE(samples_dir, "other", data->other_samp);
+ ATTRIBUTE(samples_dir, "total", data->total_samp);
return 0;
}
-int hypfs_vm_create_files(struct super_block *sb, struct dentry *root)
+int hypfs_vm_create_files(struct dentry *root)
{
struct dentry *dir, *file;
struct diag2fc_data *data;
- int rc, i, count = 0;
+ unsigned int count = 0;
+ int rc, i;
- data = diag2fc_store(guest_query, &count);
+ data = diag2fc_store(guest_query, &count, 0);
if (IS_ERR(data))
return PTR_ERR(data);
/* Hpervisor Info */
- dir = hypfs_mkdir(sb, root, "hyp");
+ dir = hypfs_mkdir(root, "hyp");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
- file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor");
+ file = hypfs_create_str(dir, "type", "z/VM Hypervisor");
if (IS_ERR(file)) {
rc = PTR_ERR(file);
goto failed;
}
/* physical cpus */
- dir = hypfs_mkdir(sb, root, "cpus");
+ dir = hypfs_mkdir(root, "cpus");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
- file = hypfs_create_u64(sb, dir, "count", data->lcpus);
+ file = hypfs_create_u64(dir, "count", data->lcpus);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
goto failed;
}
/* guests */
- dir = hypfs_mkdir(sb, root, "systems");
+ dir = hypfs_mkdir(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]));
+ rc = hpyfs_vm_create_guest(dir, &(data[i]));
if (rc)
goto failed;
}
@@ -218,14 +228,60 @@ failed:
return rc;
}
+struct dbfs_d2fc_hdr {
+ u64 len; /* Length of d2fc buffer without header */
+ u16 version; /* Version of header */
+ char tod_ext[16]; /* TOD clock for d2fc */
+ u64 count; /* Number of VM guests in d2fc buffer */
+ char reserved[30];
+} __attribute__ ((packed));
+
+struct dbfs_d2fc {
+ struct dbfs_d2fc_hdr hdr; /* 64 byte header */
+ char buf[]; /* d2fc buffer */
+} __attribute__ ((packed));
+
+static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
+{
+ struct dbfs_d2fc *d2fc;
+ unsigned int count;
+
+ d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
+ if (IS_ERR(d2fc))
+ return PTR_ERR(d2fc);
+ get_tod_clock_ext(d2fc->hdr.tod_ext);
+ d2fc->hdr.len = count * sizeof(struct diag2fc_data);
+ d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
+ d2fc->hdr.count = count;
+ memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved));
+ *data = d2fc;
+ *data_free_ptr = d2fc;
+ *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr);
+ return 0;
+}
+
+static struct hypfs_dbfs_file dbfs_file_2fc = {
+ .name = "diag_2fc",
+ .data_create = dbfs_diag2fc_create,
+ .data_free = diag2fc_free,
+};
+
int hypfs_vm_init(void)
{
+ if (!MACHINE_IS_VM)
+ return 0;
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 hypfs_dbfs_create_file(&dbfs_file_2fc);
+}
- return 0;
+void hypfs_vm_exit(void)
+{
+ if (!MACHINE_IS_VM)
+ return;
+ hypfs_dbfs_remove_file(&dbfs_file_2fc);
}
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