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Subject[PATCH V2 5/5] X86/Hyper-V: Add hyperv_nested_flush_guest_mapping ftrace support
Date
This patch is to add hyperv_nested_flush_guest_mapping support to trace
hvFlushGuestPhysicalAddressSpace hypercall.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
arch/x86/hyperv/nested.c | 3 +++
arch/x86/include/asm/trace/hyperv.h | 14 ++++++++++++++
2 files changed, 17 insertions(+)

diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
index 74dd38b5221d..42a3232f2835 100644
--- a/arch/x86/hyperv/nested.c
+++ b/arch/x86/hyperv/nested.c
@@ -25,6 +25,8 @@
#include <asm/mshyperv.h>
#include <asm/tlbflush.h>

+#include <asm/trace/hyperv.h>
+
int hyperv_flush_guest_mapping(u64 as)
{
struct hv_guest_mapping_flush **flush_pcpu;
@@ -59,6 +61,7 @@ int hyperv_flush_guest_mapping(u64 as)
ret = 0;

fault:
+ trace_hyperv_nested_flush_guest_mapping(as, ret);
return ret;
}
EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping);
diff --git a/arch/x86/include/asm/trace/hyperv.h b/arch/x86/include/asm/trace/hyperv.h
index 4253bca99989..e1ffe61de8d6 100644
--- a/arch/x86/include/asm/trace/hyperv.h
+++ b/arch/x86/include/asm/trace/hyperv.h
@@ -28,6 +28,20 @@ TRACE_EVENT(hyperv_mmu_flush_tlb_others,
__entry->addr, __entry->end)
);

+TRACE_EVENT(hyperv_nested_flush_guest_mapping,
+ 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)
+ );
+
#endif /* CONFIG_HYPERV */

#undef TRACE_INCLUDE_PATH
--
2.14.3
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