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KVM: Add kvm trace userspace interface

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This interface allows user a space application to read the trace of kvm
related events through relayfs.

Signed-off-by: Feng (Eric) Liu <eric.e.liu@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Feng(Eric) Liu
2008-04-10 08:47:53 -04:00
committed by Avi Kivity
parent 048354c8e6
commit d4c9ff2d1b
5 changed files with 311 additions and 1 deletions
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14
include/linux/kvm_host.h
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@ -15,6 +15,7 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/preempt.h>
#include <linux/marker.h>
#include <asm/signal.h>
#include <linux/kvm.h>
@ -309,5 +310,18 @@ struct kvm_stats_debugfs_item {
struct dentry *dentry;
};
extern struct kvm_stats_debugfs_item debugfs_entries[];
extern struct dentry *debugfs_dir;
#ifdef CONFIG_KVM_TRACE
int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
void kvm_trace_cleanup(void);
#else
static inline
int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
{
return -EINVAL;
}
#define kvm_trace_cleanup() ((void)0)
#endif
#endif