From 5f4d3810ca9c0304850ddfed360a49b01125bc17 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Thu, 1 Jun 2023 18:19:19 -0700 Subject: [PATCH] KVM: x86: Account fastpath-only VM-Exits in vCPU stats commit 8b703a49c9df5e74870381ad7ba9c85d8a74ed2c upstream. Increment vcpu->stat.exits when handling a fastpath VM-Exit without going through any part of the "slow" path. Not bumping the exits stat can result in wildly misleading exit counts, e.g. if the primary reason the guest is exiting is to program the TSC deadline timer. Fixes: 404d5d7bff0d ("KVM: X86: Introduce more exit_fastpath_completion enum values") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230602011920.787844-2-seanjc@google.com Signed-off-by: Sean Christopherson Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/x86.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d7af225b63d8..f48ab047b41d 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -10829,6 +10829,9 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) exit_fastpath = EXIT_FASTPATH_EXIT_HANDLED; break; } + + /* Note, VM-Exits that go down the "slow" path are accounted below. */ + ++vcpu->stat.exits; } /*