KVM: Trace shadow page lifecycle

Create, sync, unsync, zap.

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c0dda6447b9f..ac121b39a5bc 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1122,6 +1122,7 @@ static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
                 return 1;
         }
 
+        trace_kvm_mmu_sync_page(sp);
         if (rmap_write_protect(vcpu->kvm, sp->gfn))
                 kvm_flush_remote_tlbs(vcpu->kvm);
         kvm_unlink_unsync_page(vcpu->kvm, sp);
@@ -1244,8 +1245,6 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
                 quadrant &= (1 << ((PT32_PT_BITS - PT64_PT_BITS) * level)) - 1;
                 role.quadrant = quadrant;
         }
-        pgprintk("%s: looking gfn %lx role %x\n", __func__,
-                 gfn, role.word);
         index = kvm_page_table_hashfn(gfn);
         bucket = &vcpu->kvm->arch.mmu_page_hash[index];
         hlist_for_each_entry_safe(sp, node, tmp, bucket, hash_link)
@@ -1262,14 +1261,13 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
                                 set_bit(KVM_REQ_MMU_SYNC, &vcpu->requests);
                                 kvm_mmu_mark_parents_unsync(vcpu, sp);
                         }
-                        pgprintk("%s: found\n", __func__);
+                        trace_kvm_mmu_get_page(sp, false);
                         return sp;
                 }
         ++vcpu->kvm->stat.mmu_cache_miss;
         sp = kvm_mmu_alloc_page(vcpu, parent_pte);
         if (!sp)
                 return sp;
-        pgprintk("%s: adding gfn %lx role %x\n", __func__, gfn, role.word);
         sp->gfn = gfn;
         sp->role = role;
         hlist_add_head(&sp->hash_link, bucket);
@@ -1282,6 +1280,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
                 vcpu->arch.mmu.prefetch_page(vcpu, sp);
         else
                 nonpaging_prefetch_page(vcpu, sp);
+        trace_kvm_mmu_get_page(sp, true);
         return sp;
 }
 
@@ -1410,6 +1409,8 @@ static int mmu_zap_unsync_children(struct kvm *kvm,
 static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp)
 {
         int ret;
+
+        trace_kvm_mmu_zap_page(sp);
         ++kvm->stat.mmu_shadow_zapped;
         ret = mmu_zap_unsync_children(kvm, sp);
         kvm_mmu_page_unlink_children(kvm, sp);
@@ -1656,6 +1657,7 @@ static int kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
         struct kvm_mmu_page *s;
         struct hlist_node *node, *n;
 
+        trace_kvm_mmu_unsync_page(sp);
         index = kvm_page_table_hashfn(sp->gfn);
         bucket = &vcpu->kvm->arch.mmu_page_hash[index];
         /* don't unsync if pagetable is shadowed with multiple roles */