X86/Hyper-V: Add hyperv_nested_flush_guest_mapping ftrace support

Tianyu Lan · bonzini · commit 60cfce4c4f6f · 2018-08-06T17:59:05.000+02:00
This patch is to add hyperv_nested_flush_guest_mapping support to trace
hvFlushGuestPhysicalAddressSpace hypercall.

Signed-off-by: Lan Tianyu &lt;Tianyu.Lan@microsoft.com&gt;
Acked-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Paolo Bonzini &lt;pbonzini@redhat.com&gt;
diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
@@ -14,6 +14,8 @@
 #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;
@@ -48,6 +50,7 @@ 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
@@ -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

Original file line number	Diff line number	Diff line change
`@@ -14,6 +14,8 @@`
`14`	`14`	`#include <asm/mshyperv.h>`
`15`	`15`	`#include <asm/tlbflush.h>`
`16`	`16`
	`17`	`+#include <asm/trace/hyperv.h>`
	`18`	`+`
`17`	`19`	`int hyperv_flush_guest_mapping(u64 as)`
`18`	`20`	`{`
`19`	`21`	`struct hv_guest_mapping_flush **flush_pcpu;`
`@@ -48,6 +50,7 @@ int hyperv_flush_guest_mapping(u64 as)`
`48`	`50`	`ret = 0;`
`49`	`51`
`50`	`52`	`fault:`
	`53`	`+ trace_hyperv_nested_flush_guest_mapping(as, ret);`
`51`	`54`	`return ret;`
`52`	`55`	`}`
`53`	`56`	`EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping);`