lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

perf: Enhance perf to allow for guest statistic collection from host

Browse Source 
Below patch introduces perf_guest_info_callbacks and related
register/unregister functions. Add more PERF_RECORD_MISC_XXX bits
meaning guest kernel and guest user space.

Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Zhang, Yanmin
2010-04-19 13:32:41 +08:00
committed by Avi Kivity
parent b5a80b7e91
commit 39447b386c
4 changed files with 77 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
kernel/perf_event.c
View File

@ -2797,6 +2797,27 @@ void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int ski
}
/*
* We assume there is only KVM supporting the callbacks.
* Later on, we might change it to a list if there is
* another virtualization implementation supporting the callbacks.
*/
struct perf_guest_info_callbacks *perf_guest_cbs;
int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
{
perf_guest_cbs = cbs;
return 0;
}
EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks);
int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
{
perf_guest_cbs = NULL;
return 0;
}
EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
/*
* Output
*/
@ -3749,7 +3770,7 @@ void __perf_event_mmap(struct vm_area_struct *vma)
.event_id = {
.header = {
.type = PERF_RECORD_MMAP,
.misc = 0,
.misc = PERF_RECORD_MISC_USER,
/* .size */
},
/* .pid */