xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/hypfs: Add diagnose 0c support

Browse Source 
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:
Michael Holzheu
2015-02-09 14:49:10 +01:00
committed by Martin Schwidefsky
parent 45cce4ccaf
commit 34c0dad752
5 changed files with 184 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
arch/s390/hypfs/inode.c
View File

@@ -482,10 +482,14 @@ static int __init hypfs_init(void)
rc = -ENODATA;
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);
if (!s390_kobj) {
rc = -ENOMEM;
goto fail_hypfs_sprp_exit;
goto fail_hypfs_diag0c_exit;
}
rc = register_filesystem(&hypfs_type);
if (rc)
@@ -494,6 +498,8 @@ static int __init hypfs_init(void)
fail_filesystem:
kobject_put(s390_kobj);
fail_hypfs_diag0c_exit:
hypfs_diag0c_exit();
fail_hypfs_sprp_exit:
hypfs_sprp_exit();
fail_hypfs_vm_exit:
@@ -510,6 +516,7 @@ static void __exit hypfs_exit(void)
{
unregister_filesystem(&hypfs_type);
kobject_put(s390_kobj);
hypfs_diag0c_exit();
hypfs_sprp_exit();
hypfs_vm_exit();
hypfs_diag_exit();