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[08/24] KVM: x86/mmu: Drop redundant trace_kvm_mmu_set_spte() in the TDP MMU

Message ID 20210225204749.1512652-9-seanjc@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86/mmu: Introduce MMU_PRESENT and fix bugs | expand

Commit Message

Sean Christopherson Feb. 25, 2021, 8:47 p.m. UTC
Remove TDP MMU's call to trace_kvm_mmu_set_spte() that is done for both
shadow-present SPTEs and MMIO SPTEs.  It's fully redundant for the
former, and unnecessary for the latter.  This aligns TDP MMU tracing
behavior with that of the legacy MMU.

Fixes: 33dd3574f5fe ("kvm: x86/mmu: Add existing trace points to TDP MMU")
Cc: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
 arch/x86/kvm/mmu/tdp_mmu.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
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diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index f46972892a2d..782cae1eb5e1 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -773,12 +773,11 @@  static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu, int write,
 		trace_mark_mmio_spte(rcu_dereference(iter->sptep), iter->gfn,
 		ret = RET_PF_EMULATE;
-	} else
+	} else {
 		trace_kvm_mmu_set_spte(iter->level, iter->gfn,
+	}
-	trace_kvm_mmu_set_spte(iter->level, iter->gfn,
-			       rcu_dereference(iter->sptep));
 	if (!prefault)