KVM: VMX: Add PML support in VMX

This patch adds PML support in VMX. A new module parameter 'enable_pml' is added
to allow user to enable/disable it manually.

Signed-off-by: Kai Huang <kai.huang@linux.intel.com>
Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 587149bd6f76..7c7bc8bef21f 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -848,6 +848,24 @@ TRACE_EVENT(kvm_track_tsc,
 
 #endif /* CONFIG_X86_64 */
 
+/*
+ * Tracepoint for PML full VMEXIT.
+ */
+TRACE_EVENT(kvm_pml_full,
+        TP_PROTO(unsigned int vcpu_id),
+        TP_ARGS(vcpu_id),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   vcpu_id                 )
+        ),
+
+        TP_fast_assign(
+                __entry->vcpu_id                = vcpu_id;
+        ),
+
+        TP_printk("vcpu %d: PML full", __entry->vcpu_id)
+);
+
 TRACE_EVENT(kvm_ple_window,
         TP_PROTO(bool grow, unsigned int vcpu_id, int new, int old),
         TP_ARGS(grow, vcpu_id, new, old),