forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 17
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[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 <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
- Loading branch information
Michael Holzheu
authored and
Martin Schwidefsky
committed
Feb 5, 2007
1 parent
cced1dd
commit 31cb4bd
Showing
5 changed files
with
262 additions
and
27 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file was deleted.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,231 @@ | ||
| /* | ||
| * Hypervisor filesystem for Linux on s390. z/VM implementation. | ||
| * | ||
| * Copyright (C) IBM Corp. 2006 | ||
| * Author(s): Michael Holzheu <[email protected]> | ||
| */ | ||
|
|
||
| #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; | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters