KVM: MMU: show mmu_valid_gen in shadow page related tracepoints

Show sp->mmu_valid_gen
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

arch/x86/kvm/mmutrace.h

@@ -8,12 +8,14 @@
 #define TRACE_SYSTEM kvmmmu
 
 #define KVM_MMU_PAGE_FIELDS			\
+	__field(unsigned long, mmu_valid_gen)	\
 	__field(__u64, gfn)			\
 	__field(__u32, role)			\
 	__field(__u32, root_count)		\
 	__field(bool, unsync)
 
 #define KVM_MMU_PAGE_ASSIGN(sp)				\
+	__entry->mmu_valid_gen = sp->mmu_valid_gen;	\
 	__entry->gfn = sp->gfn;				\
 	__entry->role = sp->role.word;			\
 	__entry->root_count = sp->root_count;		\
@@ -28,8 +30,8 @@
 								        \
 	role.word = __entry->role;					\
 									\
-	trace_seq_printf(p, "sp gfn %llx %u%s q%u%s %s%s"		\
-			 " %snxe root %u %s%c",				\
+	trace_seq_printf(p, "sp gen %lx gfn %llx %u%s q%u%s %s%s"	\
+			 " %snxe root %u %s%c",	__entry->mmu_valid_gen,	\
 			 __entry->gfn, role.level,			\
 			 role.cr4_pae ? " pae" : "",			\
 			 role.quadrant,					\