KVM: x86: add tracepoints around __direct_map and FNAME(fetch)

These are useful in debugging shadow paging. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-07-01 06:22:57 -04:00
parent e9f2a760b1
commit 335e192a3f
3 changed files with 67 additions and 7 deletions
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -670,6 +670,8 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,

 	base_gfn = gw->gfn;

+	trace_kvm_mmu_spte_requested(addr, gw->level, pfn);
+
 	for (; shadow_walk_okay(&it); shadow_walk_next(&it)) {
 		clear_sp_write_flooding_count(it.sptep);
 		base_gfn = gw->gfn & ~(KVM_PAGES_PER_HPAGE(it.level) - 1);