From nobody Sat Oct 11 02:58:46 2025 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (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 3EBFA277CA1 for ; Wed, 11 Jun 2025 22:48:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749682103; cv=none; b=NkhD/fkN1OB+5/oNIObPLEFXPEhMSOML3X0uOqfTVHYt/eyXHzkkD2ROBdGWzZuQOK7Puy9Z+7pXN97G2LDza6adwddhCIl7aNlS1Lk58egR+4yxvtu7Ws15LI1Y2j3k7Ig9lYtJY5e8Dty0HXK/2co7VsjVSLuWgiDpmmMbARM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749682103; c=relaxed/simple; bh=NAxK4l2+eFBLeYnDW4awSCXzYKBMMUzoga23UMMP12s=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=WT9v30afu/anTwVDWBj4SZ9av/6wgI26e+UgakZhAPQOYxVqZ6bqV1A1BnkMfLVYXZ1chKK0Mi9OEd299ToUIcfOB14UEe66E0qIHj4DRzXdHQ47RZRRcyS/YA4gcQCpRnbonmY9DqB9iuXONYQ60chqwK+5tsRfGtNbDkEUoko= 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=eFUtXOLZ; arc=none smtp.client-ip=209.85.210.201 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="eFUtXOLZ" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-740270e168aso253972b3a.1 for ; Wed, 11 Jun 2025 15:48:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749682100; x=1750286900; 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=4mZdmaSdm4nN9o3kcSmnCQqm8oVomLbyxtnfKwvcz+Y=; b=eFUtXOLZhkiugYukRt7lOk6DzLCcuHUOmBCIwmIrEFW/EZIMsvSwUyLukD8mxO6ynk FE87xpXMdcQgVcLJw5NbyeuqM7p6cI2hXWEke0ZjIZ7BIwozFfNS0RPU8bdQzi//5U1A tu9VaaD5fNcF4XEIC359YPkeJLemG7QkenK859GhO/JZ0LFnrxzzooK8pVTk5V52El8n GHfBfQEEn69Nc1dtRb/h7fwPPQZWBLCbDeMIZyqriD3etIBsbzbeB4MpzuODuI4JbujH pyz1AK/MiUY3IVWmxbiZFYU3QpNvq5WcBBNBm6oYs0nFXNLeLntUKSkCdJYWTLZ1nbU9 tjsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749682100; x=1750286900; 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=4mZdmaSdm4nN9o3kcSmnCQqm8oVomLbyxtnfKwvcz+Y=; b=a80ewxlJ1mNfNpAplHleOKWJiZwd/Q4e/GNTGIGnqbW2YmfACiHYpdRuLM8E6xZDZf cFm0t99xFn1YG5et6bXnNpGOeLipKaG0iiicoAXebcQGmx4ZHM4pgQ6YK0vx5AtbZIL3 LtkY+EMPCKqeKVwfb4Wc+ztClzT5tCB8e/bJzVrrfn5qlaUQQvQSBpLNHqY3mTPy7tsx tlm3mKSe/TANIw47yHJZd3me/+xMejrlvit2xOhQeap6HxZHuoKnvdxyLfOt7P/DN78A qETFCrTbriOZtuBMgYHoFtfW5b+x4HQmg2VzyzZZWutf2pZv+KwM/gRo/i4KaBtP/55j eKWw== X-Forwarded-Encrypted: i=1; AJvYcCUaqBFJThlpAMt5gzIBPPfMgpXUn0cP2s6hLpOqgaP39rsLSyh4b43cTky4WEvI8hAHeAviRMB9Lob8/U0=@vger.kernel.org X-Gm-Message-State: AOJu0YwdaeQtZlay3bczH/PQyxFc9F8rohH7kSzdgI5Nk5j+xduNPAvj ZH78hY2rLbHdM5bXSpgPLYq0Es6ly1MQmgdRt6bgFws9uuoBfaHrSwWGNppKjiUulXoKxGsDYD6 SPQrR9Q== X-Google-Smtp-Source: AGHT+IEg+AS8QoF49j7jfT3TPcNYHFW9Ujm+mi8oTh+WHeby3lk+SesimVareIU6PzlpR4BED7xC7oESYEc= X-Received: from pgn7.prod.google.com ([2002:a63:d47:0:b0:b2c:4d7e:b626]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:2d43:b0:1f5:56fe:b437 with SMTP id adf61e73a8af0-21f86727b69mr7698366637.32.1749682100654; Wed, 11 Jun 2025 15:48:20 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 11 Jun 2025 15:45:52 -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: <20250611224604.313496-51-seanjc@google.com> Subject: [PATCH v3 49/62] KVM: x86: Drop superfluous "has assigned device" check in kvm_pi_update_irte() 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" Don't bother checking if the VM has an assigned device when updating IRTE entries. kvm_arch_irq_bypass_add_producer() explicitly increments the assigned device count, kvm_arch_irq_bypass_del_producer() explicitly decrements the count before invoking kvm_pi_update_irte(), and kvm_irq_routing_update() only updates IRTE entries if there's an active IRQ bypass producer. Signed-off-by: Sean Christopherson --- arch/x86/kvm/irq.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index 4119c1e880e7..45cb9f1ee618 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -517,9 +517,7 @@ static int kvm_pi_update_irte(struct kvm_kernel_irqfd *= irqfd, struct kvm_lapic_irq irq; int r; =20 - if (!irqchip_in_kernel(kvm) || - !kvm_arch_has_irq_bypass() || - !kvm_arch_has_assigned_device(kvm)) + if (!irqchip_in_kernel(kvm) || !kvm_arch_has_irq_bypass()) return 0; =20 if (entry && entry->type =3D=3D KVM_IRQ_ROUTING_MSI) { --=20 2.50.0.rc1.591.g9c95f17f64-goog