diff options
| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2012-06-20 09:59:41 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-07-11 15:51:21 +0200 |
| commit | a72faf2504dfc12ff9bfb486a42f2761296666ff (patch) | |
| tree | bc8d0c376d90f06d146cb8831ef44cc0b43f66b5 /arch/x86/kvm/mmutrace.h | |
| parent | KVM: MMU: fast path of handling guest page fault (diff) | |
| download | linux-a72faf2504dfc12ff9bfb486a42f2761296666ff.tar.xz linux-a72faf2504dfc12ff9bfb486a42f2761296666ff.zip | |
KVM: MMU: trace fast page fault
To see what happen on this path and help us to optimize it
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmutrace.h')
| -rw-r--r-- | arch/x86/kvm/mmutrace.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h index 89fb0e81322a..c364abc8d034 100644 --- a/arch/x86/kvm/mmutrace.h +++ b/arch/x86/kvm/mmutrace.h @@ -243,6 +243,44 @@ TRACE_EVENT( TP_printk("addr:%llx gfn %llx access %x", __entry->addr, __entry->gfn, __entry->access) ); + +#define __spte_satisfied(__spte) \ + (__entry->retry && is_writable_pte(__entry->__spte)) + +TRACE_EVENT( + fast_page_fault, + TP_PROTO(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, + u64 *sptep, u64 old_spte, bool retry), + TP_ARGS(vcpu, gva, error_code, sptep, old_spte, retry), + + TP_STRUCT__entry( + __field(int, vcpu_id) + __field(gva_t, gva) + __field(u32, error_code) + __field(u64 *, sptep) + __field(u64, old_spte) + __field(u64, new_spte) + __field(bool, retry) + ), + + TP_fast_assign( + __entry->vcpu_id = vcpu->vcpu_id; + __entry->gva = gva; + __entry->error_code = error_code; + __entry->sptep = sptep; + __entry->old_spte = old_spte; + __entry->new_spte = *sptep; + __entry->retry = retry; + ), + + TP_printk("vcpu %d gva %lx error_code %s sptep %p old %#llx" + " new %llx spurious %d fixed %d", __entry->vcpu_id, + __entry->gva, __print_flags(__entry->error_code, "|", + kvm_mmu_trace_pferr_flags), __entry->sptep, + __entry->old_spte, __entry->new_spte, + __spte_satisfied(old_spte), __spte_satisfied(new_spte) + ) +); #endif /* _TRACE_KVMMMU_H */ #undef TRACE_INCLUDE_PATH |