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authorFeng(Eric) Liu <eric.e.liu@intel.com>2008-04-10 08:47:53 -0400
committerAvi Kivity <avi@qumranet.com>2008-04-27 12:01:22 +0300
commitd4c9ff2d1b78e385471b3f4d80c0596909926ef7 (patch)
tree5551c0f6c56439df39ca434115840f4e36cee2ea /virt/kvm/kvm_main.c
parent048354c8e6bf95e7347f623d8a0da5b89e216405 (diff)
downloadlinux-2.6.38-lt-ux500-d4c9ff2d1b78e385471b3f4d80c0596909926ef7.tar.gz
KVM: Add kvm trace userspace interface
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>
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 6a52c084e06..d5911d9895c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -60,7 +60,7 @@ EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
static __read_mostly struct preempt_ops kvm_preempt_ops;
-static struct dentry *debugfs_dir;
+struct dentry *debugfs_dir;
static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
unsigned long arg);
@@ -1191,6 +1191,11 @@ static long kvm_dev_ioctl(struct file *filp,
r += PAGE_SIZE; /* pio data page */
#endif
break;
+ case KVM_TRACE_ENABLE:
+ case KVM_TRACE_PAUSE:
+ case KVM_TRACE_DISABLE:
+ r = kvm_trace_ioctl(ioctl, arg);
+ break;
default:
return kvm_arch_dev_ioctl(filp, ioctl, arg);
}
@@ -1519,6 +1524,7 @@ EXPORT_SYMBOL_GPL(kvm_init);
void kvm_exit(void)
{
+ kvm_trace_cleanup();
misc_deregister(&kvm_dev);
kmem_cache_destroy(kvm_vcpu_cache);
sysdev_unregister(&kvm_sysdev);