From mboxrd@z Thu Jan 1 00:00:00 1970 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 61FA23D0932 for ; Fri, 29 May 2026 11:12:15 +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=1780053138; cv=none; b=kT3+8/MrFmMbGVHBfmr/Xi9o4uriQkIimE6KISZQdX5zoL2+aG2AuJnh5Iw++9ADY40t0mkaEHA5xBA5MOGQUJo138OFl4doEmyzaha7oPp+yngNMO0S6Cr/5dbngv2nNnQ2ku3os48FoLXgd/wWrTKS0h143PpUfzY+RuvS4dY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780053138; c=relaxed/simple; bh=zLhKJQfxvv+d9aNsqJrU4irOe5OKs7/A2799Tf2JNWI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=QgXCtcmtSb2PME2nLOYcwo3+R4JBGVpOHSlbrnehUEOXGQF1ibnjGyaCrJPDh1JDY7l9WuSGk6nj3zqwCdfwhZxSaTqf7XNZtvRUJ1eGVBquLyttu3Wsp+LO+AdA7zmlDmq4MKYV9yfIUmUYHtASJkBVNUh/qQddhY4oI1G/yuQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--praan.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=wSUoIdbO; 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--praan.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="wSUoIdbO" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2b99eb06178so62691525ad.2 for ; Fri, 29 May 2026 04:12:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780053134; x=1780657934; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=H1WHbQ1I/exyopX3p7b75ehhnkD9ODb3Bve7jByn9iQ=; b=wSUoIdbO7fFMo9G4JafqQaEVtqtyTZ31hqyLopqjaby3Tvx6KI/Omn1lNYGAayNejO 7nSFJCAId5T/6PFskeIZ+pMRfTpbsp5u36kG73eFy3h0eyjo99VCabaw0VMY0nqNbsWY o/8dG0OMlZDwZj4r6RfL+wtJQT0aGv5bRePYrYAw6JJDQP9iNTUav0JZ8gZNWYTcObLF maMSkXkRNWyRhcsle7XyPEmuwpvEcSPj6zF1Hh1fNg7I0y9Ci3ClAKncz6XJxemVKFFs VCPhaBzOCINcOpo0m8JL6I1lw7KddXnT2K4f9Hfm8Dr0/vQaY9HbpeQUu2sX8Y2PXAWB yVaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780053134; x=1780657934; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=H1WHbQ1I/exyopX3p7b75ehhnkD9ODb3Bve7jByn9iQ=; b=bngHR9+fOWOu6A/DzyvcUnaxn5ur+mC/OmJBKdRERSRMQW6frvTMFj8GHxfVoFfvvw /09/Z5eOkR6XsAi5rIBNu6CDkjc9uaRHqHdqRLFss+57arWaHACV1/Hq5IaYRNcL84Aj 0t2L+i7PrKm2dym4IX3H6/A+co8VwOyWzLdz0R29aRzx7y16XOH+z1KdXDbp2jftZ/t+ Bae9dBBkPraUMG4yWZpSDnOE7l5XxMNt8FgG1Cpv9AtWhmYoL44PsNgx/e1a+3/EZ3XL z8T2W3VP+TaNgy+pfwvl9byaz+OG+okfPsVOwiBAjke0Q57c71eyMHudHoyNLQCtzWJv xn7Q== X-Forwarded-Encrypted: i=1; AFNElJ/ypxH8bIWpJYUps3Uk7Nh/OEhVbDg06GjVBCBnQDPuPjeKdU3fe1uKNYSfEGo74A3kN/la3wNoVwKM+kQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxfJdBTts8HP1gNhQ8FkVA3ZcLcC+6olhNLZCLMWJ/UoaWh4tJ/ I/jkqLM8eVp03uI86FD3gPIrSE43xyBqm/jD2eYdUjA4a6pUEYrRF55VCZj7P6LqTMhnMGJvHWp NKw== X-Received: from pln12.prod.google.com ([2002:a17:903:360c:b0:2bd:5ced:c1c0]) (user=praan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:ced0:b0:2bc:7d1d:b677 with SMTP id d9443c01a7336-2bf20ce01c6mr32213585ad.36.1780053134160; Fri, 29 May 2026 04:12:14 -0700 (PDT) Date: Fri, 29 May 2026 11:12:03 +0000 In-Reply-To: <20260529111208.387412-1-praan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260529111208.387412-1-praan@google.com> X-Mailer: git-send-email 2.54.0.823.g6e5bcc1fc9-goog Message-ID: <20260529111208.387412-2-praan@google.com> Subject: [PATCH v6 1/6] PCI/ATS: Ensure pci_ats_supported() is PF-aware for VFs From: Pranjal Shrivastava To: iommu@lists.linux.dev, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Joerg Roedel , Will Deacon , Bjorn Helgaas , David Woodhouse , Lu Baolu , Robin Murphy , Suravee Suthikulpanit , Jason Gunthorpe , Nicolin Chen , David Matlack , Samiullah Khawaja , Daniel Mentz , Pasha Tatashin , Mostafa Saleh , Pranjal Shrivastava , Jason Gunthorpe Content-Type: text/plain; charset="UTF-8" Update pci_ats_supported() to additionally check the associated PF's status when called on a VF. This ensures that PF-level quirks and untrusted status are correctly propagated to VFs, providing a robust support check that aligns with the kernel's PF-centric ATS configuration model and is immune to the timing of VF-specific fixups. Reviewed-by: Jason Gunthorpe Reviewed-by: Samiullah Khawaja Reviewed-by: Nicolin Chen Reviewed-by: Lu Baolu Signed-off-by: Pranjal Shrivastava --- drivers/pci/ats.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c index 96efa00d9743..679a3c3c1d54 100644 --- a/drivers/pci/ats.c +++ b/drivers/pci/ats.c @@ -40,10 +40,13 @@ void pci_ats_init(struct pci_dev *dev) */ bool pci_ats_supported(struct pci_dev *dev) { - if (!dev->ats_cap) + if (!dev->ats_cap || dev->untrusted) return false; - return (dev->untrusted == 0); + if (dev->is_virtfn) + return pci_ats_supported(pci_physfn(dev)); + + return true; } EXPORT_SYMBOL_GPL(pci_ats_supported); -- 2.54.0.823.g6e5bcc1fc9-goog