Commit 35006126 authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Gleb Natapov
Browse files

KVM: MMU: add tracepoint for kvm_mmu_invalidate_all_pages 



It is good for debug and development

Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
parent 2248b023

arch/x86/kvm/mmu.c

+1 −0
Original line number Diff line number Diff line
@@ -4264,6 +4264,7 @@ static void kvm_zap_obsolete_pages(struct kvm *kvm) 
void kvm_mmu_invalidate_zap_all_pages(struct kvm *kvm)

{

	spin_lock(&kvm->mmu_lock);

	trace_kvm_mmu_invalidate_zap_all_pages(kvm);

	kvm->arch.mmu_valid_gen++;



	kvm_zap_obsolete_pages(kvm);

arch/x86/kvm/mmutrace.h

+20 −0
Original line number Diff line number Diff line
@@ -276,6 +276,26 @@ TRACE_EVENT( 
		  __spte_satisfied(old_spte), __spte_satisfied(new_spte)

	)

);



TRACE_EVENT(

	kvm_mmu_invalidate_zap_all_pages,

	TP_PROTO(struct kvm *kvm),

	TP_ARGS(kvm),



	TP_STRUCT__entry(

		__field(unsigned long, mmu_valid_gen)

		__field(unsigned int, mmu_used_pages)

	),



	TP_fast_assign(

		__entry->mmu_valid_gen = kvm->arch.mmu_valid_gen;

		__entry->mmu_used_pages = kvm->arch.n_used_mmu_pages;

	),



	TP_printk("kvm-mmu-valid-gen %lx used_pages %x",

		  __entry->mmu_valid_gen, __entry->mmu_used_pages

	)

);

#endif /* _TRACE_KVMMMU_H */



#undef TRACE_INCLUDE_PATH