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 A179A37E2E5 for ; Thu, 4 Jun 2026 18:21:23 +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=1780597285; cv=none; b=c0tdWE2t/rqlNrxLlj4l2cl9SUxyKsizfWBuJY7xMiH6bRJuLEclgV/DGbl6807XaTK+FTicRwsuURIViNU+tUeN4W5EpJQEBJqUlMaeIwg23w6NXj1UCmb6PWHO+a//mACd7YozuJrqlvY+0blGLa8PQPBjfpBXuUgB5mraiuM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780597285; c=relaxed/simple; bh=Es1v8sdHF6j+zSSIs3uGcU7RSkCWnEMk56BnyfML4Gk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Q7nG/S3dvZlGyTpcxYPFzvyQVXoI9s1wnN6JXq3+2koCdvZ/PzSB0MxU3+q+YIGGIH8ZCQ4KijWR+KJh7i8m3zZBuj6vO/su40M+HlCVa/tsjDfHdZrSxywR5Wp3SsY3/WMUB+YMvJ9R/hCY0e58A9pR2iNLDYbQLav1JypS2ig= 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=NqHP4AWN; 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="NqHP4AWN" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-36d99333358so1056743a91.3 for ; Thu, 04 Jun 2026 11:21:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780597283; x=1781202083; 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=6xpzlsU/13g3vBsNTBir2ktpGFm/ePGN+o4IZaBkeOg=; b=NqHP4AWNiCHSIrz9wJ6yztw1lnsu5UZd0Us7yHI1b29/m+ci7MSHCTatBjlZcbn3RR +ZO2vkb7PMp/DGWTw2YjUZZ1fEyVGSygGaWG+WKWOpBTNtpSaYN/WaPc/3cWzC1OPS3O R9SyJ9zFKEb5G1D+77hifU160kSZb675TC5g1nNfz7zCtgQosD5N1S/JX+4hfIniWpRB 7r5FiTWynvPjPzSGEHaqWlkj1hmQsumJ0tfudlq3hlO9+5Q+u/T8ZUqbw88/wkW8NLaV HVNqvXHGPDhIvWW2h3/R/EOws60pVwm99mZwML6IFIn1t3v0Hui+WwDeLkmTVhJT7OaJ mTiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780597283; x=1781202083; 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=6xpzlsU/13g3vBsNTBir2ktpGFm/ePGN+o4IZaBkeOg=; b=i/PbfVAw12gvD8PQ/7lMkrsxYwqXDUV9ph47qtIkpKrfX/nM4eB1jnJ3lgy2cSbu8o 12jTZdkphOBl7CzjAx+1Df0+N6CTo1ADUc7A3UNmbK7Vtly0jmB4YSNXMRr19+rNqblX Xpry03aexnzBaPepzXT12yaMfnkrsne2kJrMShZuwb5M4fXZG3DeEaB3ftT1zkS4lRB8 A2L4FpvMjp9anGEu7IdDF76C1FqAxvsNE53vo5i/K6ruE67fFcqhlwKLInZH/1C9MTxa NvKDz8cUjvLkvteD4t7Bok26IZ0jbg7UdAudeTB37zWTg6XROgm8YKVmg/GreUsfu1Rk igug== X-Forwarded-Encrypted: i=1; AFNElJ9Ap+Uls8cu13hNDkrh67QEjht4tnbvbNX3bhCmkOgxhO743A/DVYDt1jaDLbokdC/dlOFk8aZ8G9TshL8=@vger.kernel.org X-Gm-Message-State: AOJu0YznC/ioQ/XljDzj/ygl7H6YbMR8D/YCohg5EY/OwMwsgjeh7r2r S9FhI28kjN/nwv+KwZHAaMELhpXNURMq4k1LNPFZ9r8kDzGA+X9UqbG2u9JCAvSWVceRnW6rJ6L cIA== X-Received: from pjbmd5.prod.google.com ([2002:a17:90b:23c5:b0:36a:f1b9:c389]) (user=praan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4b87:b0:368:b01c:85a0 with SMTP id 98e67ed59e1d1-370f0b54dc0mr99930a91.14.1780597282715; Thu, 04 Jun 2026 11:21:22 -0700 (PDT) Date: Thu, 4 Jun 2026 18:21:13 +0000 In-Reply-To: <20260604182116.3179005-1-praan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260604182116.3179005-1-praan@google.com> X-Mailer: git-send-email 2.54.0.1032.g2f8565e1d1-goog Message-ID: <20260604182116.3179005-2-praan@google.com> Subject: [PATCH v8 1/4] 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-kernel@vger.kernel.org Cc: Joerg Roedel , Will Deacon , Robin Murphy , Baolu Lu , Jason Gunthorpe , Kevin Tian , Bjorn Helgaas , Samiullah Khawaja , Pranjal Shrivastava , Nicolin Chen 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 Reviewed-by: Kevin Tian 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); -- 2.54.0.1032.g2f8565e1d1-goog