| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.12 301/700] KVM: x86/mmu: Drop redundant trace_kvm_mmu_set_spte() in the TDP MMU | Date | Mon, 12 Jul 2021 08:06:24 +0200 |
| |
From: Sean Christopherson <seanjc@google.com>
[ Upstream commit 3849e0924ef14a245aa292ecaa9accdc4792012c ]
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> Message-Id: <20210225204749.1512652-9-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/x86/kvm/mmu/tdp_mmu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 0aca7dcbcbf9..7cfb55788df5 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -777,12 +777,11 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu, int write, trace_mark_mmio_spte(rcu_dereference(iter->sptep), iter->gfn, new_spte); ret = RET_PF_EMULATE; - } else + } else { trace_kvm_mmu_set_spte(iter->level, iter->gfn, rcu_dereference(iter->sptep)); + } - trace_kvm_mmu_set_spte(iter->level, iter->gfn, - rcu_dereference(iter->sptep)); if (!prefault) vcpu->stat.pf_fixed++; -- 2.30.2
|