From nobody Sat Oct 11 02:58:13 2025 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE1A52D6600 for ; Wed, 11 Jun 2025 22:47:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749682076; cv=none; b=FVcE+iJ7zwBOLDPMqq3W3FZrb9rcRMLeFQEQMBSlnE1g/JFvwryY3mcNIKXQzQ7DzEC6v7i8fDZ6F3sjNP3kQBA/ZqDACObrVeJ5hFoe/V/qEMZd1YTw8m0mzAzSyrJERJ/0+B6gJbAl8bePn73Q+chRl9FB16TXheTCA9lTVtw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749682076; c=relaxed/simple; bh=kywKfKPTKKbP5xL2C71yOUcn3SiU0Y8qTPlvnXK8BT8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=UD2WaelGd6aRZoxA4iEi/s+fCC5WvUZITrSZgp8WNXz7ZOu+CbFIV4iuW6wfNJ+dMBj3Vih2OrOEBDmQpGVqEZqulkZGUgEgXNBOfCxJ6rF9QvGvscjE5z6sxAhwYomQ3dtnNInEPet3EeZFZtCpQP9cOTPLXCJ1nd4d8kKgtGw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=L/bUNBmQ; arc=none smtp.client-ip=209.85.214.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="L/bUNBmQ" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-235f77f86f6so2092885ad.2 for ; Wed, 11 Jun 2025 15:47:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749682074; x=1750286874; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=t1v5tfF/UZZJDfH96jk5AIZx6aa1AacPrxrUndI2qrI=; b=L/bUNBmQPQferoAqoy2cLDu73Tc/emyawOvHOFWh+nDY2YDuzp5e7bKXncIPHtuoNo 5Vq7n4fFqvBQV2gb1Rp0PrtyOtk4vUc08rG7wv8RPFcVmBWMUOeYuV+gnfpMMtrCPO4L qKjOF27GgH8xGSSS1kOJcG/YiPoG0/jBm8Ly48NVfYR+uvjmlrmlrbg97KmoPxwR1/P4 r2wZe+Dg5pdZemfFNE0SL249+KqYdSiYHBrAv1hCqUPBcQEKC3HenJaJtJz9l1fW+Ti4 0pWEG/QH0irX+DC2I2rQtk9sD8o2EWJq6tHCWL1SBKcRZ6tnQpbG4kzrl0h5KucLS3Y9 KS/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749682074; x=1750286874; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=t1v5tfF/UZZJDfH96jk5AIZx6aa1AacPrxrUndI2qrI=; b=ZdK5sAj/NL9sVMUS7QTkV9c5RTNNdkVgrs9ruuxEidXQqI/TtCOnjqtgYwyTn7DG4r 49AUYSXiA7C15nByQ+GSR0iS17sgp2MGn7j1RRLLYIh1iXPJg8DymjDw1LWyn5ajHOK+ IWYzN8cp0QhXGMV7f8dsRhJt8Lnk00t/9a8AQvE//ShPEJWK19pz1YJ82e0ssIIrC2Fw +yvI0b7m2GD1QZde0jRk/t6r/idfGoxYgPeNFax02io949J+7NDZUzkT9yDqawX9Tufr VSeMHXijBr+okh8lcAfrahPban/CE/IKVBS7oiWSdBazY8ExHI16/OCW3zZ/HhuiJNHe kCqw== X-Forwarded-Encrypted: i=1; AJvYcCWzAqFHbOBiVvguA3T5dNMtd7qKg9jVenwtR1R+LrGuCa8jcd/EQDxi+B15CEk0FV0hoJLHUiPs30G9rkM=@vger.kernel.org X-Gm-Message-State: AOJu0Yx4ZOu+tfBFNEDbo6b2luK2lXvY3buaQ/yLy33oZntfirsQq8rw l+v6Eq4kfjVU98OabbENKejyT0E876chD6CWIAdmW14ZdgtW7d93+C9/wjQKbP1QMgYaSDq/Rln 3ejZaxQ== X-Google-Smtp-Source: AGHT+IHIOpTSYBslk2iwZ1Yvx7LxGgsjWNiUHu2s2XYfcpOZTsc6ZoL/od1AWVcDdNAHt+Yg97+L8Wtz5XQ= X-Received: from pjbta5.prod.google.com ([2002:a17:90b:4ec5:b0:311:8076:14f1]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:2f4e:b0:234:cb4a:bc1b with SMTP id d9443c01a7336-2364d90f8acmr10461455ad.49.1749682074268; Wed, 11 Jun 2025 15:47:54 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 11 Jun 2025 15:45:37 -0700 In-Reply-To: <20250611224604.313496-2-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250611224604.313496-2-seanjc@google.com> X-Mailer: git-send-email 2.50.0.rc1.591.g9c95f17f64-goog Message-ID: <20250611224604.313496-36-seanjc@google.com> Subject: [PATCH v3 34/62] KVM: x86: Track irq_bypass_vcpu in common x86 code From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Sean Christopherson , Paolo Bonzini , Joerg Roedel , David Woodhouse , Lu Baolu Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Sairaj Kodilkar , Vasant Hegde , Maxim Levitsky , Joao Martins , Francesco Lavra , David Matlack Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Track the vCPU that is being targeted for IRQ bypass, a.k.a. for a posted IRQ, in common x86 code. This will allow for additional consolidation of the SVM and VMX code. Tested-by: Sairaj Kodilkar Signed-off-by: Sean Christopherson --- arch/x86/kvm/irq.c | 7 ++++++- arch/x86/kvm/svm/avic.c | 4 ---- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index 48134aebb541..6447ea518d01 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -544,8 +544,13 @@ static int kvm_pi_update_irte(struct kvm_kernel_irqfd = *irqfd, =20 r =3D kvm_x86_call(pi_update_irte)(irqfd, irqfd->kvm, host_irq, irqfd->gs= i, vcpu, irq.vector); - if (r) + if (r) { + WARN_ON_ONCE(irqfd->irq_bypass_vcpu && !vcpu); + irqfd->irq_bypass_vcpu =3D NULL; return r; + } + + irqfd->irq_bypass_vcpu =3D vcpu; =20 trace_kvm_pi_irte_update(host_irq, vcpu, irqfd->gsi, irq.vector, !!vcpu); return 0; diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c index 6085a629c5e6..97b747e82012 100644 --- a/arch/x86/kvm/svm/avic.c +++ b/arch/x86/kvm/svm/avic.c @@ -767,22 +767,18 @@ static void svm_ir_list_del(struct kvm_kernel_irqfd *= irqfd) spin_lock_irqsave(&to_svm(vcpu)->ir_list_lock, flags); list_del(&irqfd->vcpu_list); spin_unlock_irqrestore(&to_svm(vcpu)->ir_list_lock, flags); - - irqfd->irq_bypass_vcpu =3D NULL; } =20 static int svm_ir_list_add(struct vcpu_svm *svm, struct kvm_kernel_irqfd *irqfd, struct amd_iommu_pi_data *pi) { - struct kvm_vcpu *vcpu =3D &svm->vcpu; unsigned long flags; u64 entry; =20 if (WARN_ON_ONCE(!pi->ir_data)) return -EINVAL; =20 - irqfd->irq_bypass_vcpu =3D vcpu; irqfd->irq_bypass_data =3D pi->ir_data; =20 spin_lock_irqsave(&svm->ir_list_lock, flags); --=20 2.50.0.rc1.591.g9c95f17f64-goog