[PATCH V3 11/13] x86/Hyper-v: Add trace in the hyperv_nested_flush_guest_mapping_range()

[Tianyu Lan]

This patch is to trace log in the hyperv_nested_flush_
guest_mapping_range().

Signed-off-by: Lan Tianyu <tianyu....@microsoft.com>
---
 arch/x86/hyperv/nested.c            |  1 +
 arch/x86/include/asm/trace/hyperv.h | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
index a6fdfec63c7d..4850c74508f3 100644
--- a/arch/x86/hyperv/nested.c
+++ b/arch/x86/hyperv/nested.c
@@ -135,6 +135,7 @@ int hyperv_flush_guest_mapping_range(u64 as, struct 
hyperv_tlb_range *range)
        else
                ret = status;
 fault:
+       trace_hyperv_nested_flush_guest_mapping_range(as, ret);
        return ret;
 }
 EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping_range);
diff --git a/arch/x86/include/asm/trace/hyperv.h 
b/arch/x86/include/asm/trace/hyperv.h
index 2e6245a023ef..ace464f09681 100644
--- a/arch/x86/include/asm/trace/hyperv.h
+++ b/arch/x86/include/asm/trace/hyperv.h
@@ -42,6 +42,20 @@ TRACE_EVENT(hyperv_nested_flush_guest_mapping,
            TP_printk("address space %llx ret %d", __entry->as, __entry->ret)
        );
 
+TRACE_EVENT(hyperv_nested_flush_guest_mapping_range,
+           TP_PROTO(u64 as, int ret),
+           TP_ARGS(as, ret),
+
+           TP_STRUCT__entry(
+                   __field(u64, as)
+                   __field(int, ret)
+                   ),
+           TP_fast_assign(__entry->as = as;
+                          __entry->ret = ret;
+                   ),
+           TP_printk("address space %llx ret %d", __entry->as, __entry->ret)
+       );
+
 TRACE_EVENT(hyperv_send_ipi_mask,
            TP_PROTO(const struct cpumask *cpus,
                     int vector),
-- 
2.14.4