From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 D215B1C3318 for ; Thu, 28 May 2026 20:23:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779999839; cv=none; b=bzQoCj37NkTOBbDhHbq4chqNKhDaHe+oGhsSnQom94oSBghIlO0KisWuAppzq+asfyekPk3R4+lQmZ0BGkFDZ11aD9UHYQqEX5MIRguwLAvYUsuDKMGb+6PXNtbgNONgtmycjZ2L9iH2JPxKq5gHo9Vy14fy8CHxj2G3GUnxrYM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779999839; c=relaxed/simple; bh=6JPZRBT6suYUThuvCh6y+NiY5DV75TOqoNSPL+EfItk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=dCMFD6imbNTijN+fBeDVRyNXxZqTusJCxyzCHiIML735fyAW2dt1RwS7aLMBXVx1vJ97/rXJv9dUvmY57oE3q0AdZIOmziLzTKKNvzSoV4pnBmiEYhoKiwEKyUcmpJEjCiz1OPO9bsoxRCURwXSjc4NapoD317o/9YrsfmGoAYc= 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=YGoFNj8c; arc=none smtp.client-ip=209.85.216.74 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="YGoFNj8c" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-3663cbff31cso7772889a91.2 for ; Thu, 28 May 2026 13:23:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1779999838; x=1780604638; 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=xwbylVdF+O+8AihJparLUGU02SRqGSrn4Cd3mbYF5r4=; b=YGoFNj8csgKXXUq3hSOwz8usr620b/KV1l1sMFLzaIbJyaWGVdUnmsTrdpNHfcP99P FixGUAZa5tJM/yxrjvUWIIQbhlAOmhtXYA8E3kE6YCoP5qJ8swBqsd7pEbEDwlNDyvAp mw51qf1IY4KMRwb4ZSXXQ5uW2V40ZPlJOxpc9XBXjZikHBAK/Gq4Pa1gYYQQRRwootot DB8szYuIbidakCd9DveDIGHn3VZDhTIjX1/TXkXclIibMItaXs+NML2ED/XdHnt3V4xK vrGtIbLN0G5Kgt17qOSo9gQ3pYkeNNUGZk9PxZGIQF76pT+0FVTxCFRFmMQFL83Msi4e VxZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779999838; x=1780604638; 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=xwbylVdF+O+8AihJparLUGU02SRqGSrn4Cd3mbYF5r4=; b=Tk3hQfjYQ8NghY+ydu04A78P1n+n+7JIQDQv687TImf5nnHnDBTLKbAQPaZaNjJzl6 H1Or8P0ryl2MFRax57NPWJLR2hEBoROOJIJqcFSanlpCBcgN9TV9KhN8+lsa0bpQc6KY eq8VXXh//54jTvTvzxDiGQ74m39MUgI3RIzJJ5iBd95JQbhj0JsfSbChRZPTttH8GN7Z vGuo7DvE2p7BBCN7VZhmB7yyYXwwKaDQsfYxn3kPIPUJrk/hAbPKwA4HL7FjE6tLjyq0 HevOnktSqfB/pGeQTYawkCeiMW0B3X4h02z44XGff5j8TSRlQsjxBaTpIhLfWLoVEkEz /INA== X-Forwarded-Encrypted: i=1; AFNElJ8oiUwczhqQl9GsKjh6RAPyJX2RVR8ShMTQJbQE8XwDaX+kIbQbbExMepPjcY+OhFDxs25/GRIjWZAvLzM=@vger.kernel.org X-Gm-Message-State: AOJu0Yw7/thlrVELSrXiWs1Prp5ueJ2qR3adLN+GnYBk9N++hfugQOK9 0GpIjq4fH0hP9pmGeTh+GmJ8Lyk+j5wIw4BvhFZl9xTKPdyaShly7pyLbI6TqsybPFiTzU4FVuQ ufQ== X-Received: from pjbcu14.prod.google.com ([2002:a17:90a:fa8e:b0:369:9cde:eaa0]) (user=praan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:e7c9:b0:368:1088:bb1d with SMTP id 98e67ed59e1d1-36bbcfd9807mr90130a91.15.1779999837989; Thu, 28 May 2026 13:23:57 -0700 (PDT) Date: Thu, 28 May 2026 20:23:47 +0000 In-Reply-To: <20260528202353.3422206-1-praan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260528202353.3422206-1-praan@google.com> X-Mailer: git-send-email 2.54.0.823.g6e5bcc1fc9-goog Message-ID: <20260528202353.3422206-2-praan@google.com> Subject: [PATCH v5 1/7] 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 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