It is useful for debug mmio spte invalidation Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> --- arch/x86/kvm/mmu.c | 9 +++++++-- arch/x86/kvm/mmutrace.h | 24 ++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 1020152..d314e21 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -279,8 +279,13 @@ static bool set_mmio_spte(struct kvm *kvm, u64 *sptep, gfn_t gfn, static bool check_mmio_spte(struct kvm *kvm, u64 spte) { - return get_mmio_spte_generation(spte) == - kvm_current_mmio_generation(kvm); + unsigned int kvm_gen, spte_gen; + + kvm_gen = kvm_current_mmio_generation(kvm); + spte_gen = get_mmio_spte_generation(spte); + + trace_check_mmio_spte(spte, kvm_gen, spte_gen); + return kvm_gen == spte_gen; } static inline u64 rsvd_bits(int s, int e) diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h index f5b62a7..dac44ab 100644 --- a/arch/x86/kvm/mmutrace.h +++ b/arch/x86/kvm/mmutrace.h @@ -276,6 +276,30 @@ TRACE_EVENT( __spte_satisfied(old_spte), __spte_satisfied(new_spte) ) ); + + +TRACE_EVENT( + check_mmio_spte, + TP_PROTO(u64 spte, unsigned int kvm_gen, unsigned int spte_gen), + TP_ARGS(spte, kvm_gen, spte_gen), + + TP_STRUCT__entry( + __field(unsigned int, kvm_gen) + __field(unsigned int, spte_gen) + __field(u64, spte) + ), + + TP_fast_assign( + __entry->kvm_gen = kvm_gen; + __entry->spte_gen = spte_gen; + __entry->spte = spte; + ), + + TP_printk("spte %llx kvm_gen %x spte-gen %x valid %d", __entry->spte, + __entry->kvm_gen, __entry->spte_gen, + __entry->kvm_gen == __entry->spte_gen + ) +); #endif /* _TRACE_KVMMMU_H */ #undef TRACE_INCLUDE_PATH -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html