From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85C75C433DF for ; Tue, 25 Aug 2020 20:16:50 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 533632074D for ; Tue, 25 Aug 2020 20:16:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="ov+X/vU+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 533632074D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 1787187699; Tue, 25 Aug 2020 20:16:50 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DQnaS2+cxaVO; Tue, 25 Aug 2020 20:16:49 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 7826E87634; Tue, 25 Aug 2020 20:16:49 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4A5B3C016F; Tue, 25 Aug 2020 20:16:49 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5A070C0051 for ; Tue, 25 Aug 2020 20:16:48 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 406778766C for ; Tue, 25 Aug 2020 20:16:48 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Mf1jfZmOeASh for ; Tue, 25 Aug 2020 20:16:36 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by hemlock.osuosl.org (Postfix) with ESMTPS id 9332487634 for ; Tue, 25 Aug 2020 20:16:36 +0000 (UTC) Received: from localhost (104.sub-72-107-126.myvzw.com [72.107.126.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 067E02074D; Tue, 25 Aug 2020 20:16:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598386596; bh=D7Rw2PMoe8IDZOMsNEwXYiBG5PbxcS/orkj8Yivovec=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=ov+X/vU+a12BRBzFUckIxiGJXa6k21v6DegMqYXhC5Zng0n4wC039Oo6Bh3gFLV6x 5vD3ZwCEzBTgAbeasiFHcdum1DtDxjLMC1uSLEqHlzqHo8MC0nxm4f0VoTgli+T0Qr kEY+uzx7LZz3MSVAGwF8UOQyU/JHe/YeVdDsMVuw= Date: Tue, 25 Aug 2020 15:16:34 -0500 From: Bjorn Helgaas To: Thomas Gleixner Subject: Re: [patch RFC 21/38] PCI: MSI: Provide pci_dev_has_special_msi_domain() helper Message-ID: <20200825201634.GA1924972@bjorn-Precision-5520> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200821002947.373714034@linutronix.de> Cc: Dimitri Sivanich , linux-hyperv@vger.kernel.org, Steve Wahl , linux-pci@vger.kernel.org, "K. Y. Srinivasan" , Dan Williams , Wei Liu , Stephen Hemminger , Baolu Lu , Marc Zyngier , x86@kernel.org, Jason Gunthorpe , Megha Dey , xen-devel@lists.xenproject.org, Kevin Tian , Konrad Rzeszutek Wilk , Haiyang Zhang , Alex Williamson , Stefano Stabellini , Bjorn Helgaas , Dave Jiang , Boris Ostrovsky , Jon Derrick , Juergen Gross , Russ Anderson , Greg Kroah-Hartman , LKML , iommu@lists.linux-foundation.org, Jacob Pan , "Rafael J. Wysocki" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Fri, Aug 21, 2020 at 02:24:45AM +0200, Thomas Gleixner wrote: > Provide a helper function to check whether a PCI device is handled by a > non-standard PCI/MSI domain. This will be used to exclude such devices > which hang of a special bus, e.g. VMD, to be excluded from the irq domain > override in irq remapping. > > Signed-off-by: Thomas Gleixner > Cc: Bjorn Helgaas > Cc: linux-pci@vger.kernel.org Acked-by: Bjorn Helgaas s|PCI: MSI:|PCI/MSI:| in the subject if feasible. > --- > drivers/pci/msi.c | 22 ++++++++++++++++++++++ > include/linux/msi.h | 1 + > 2 files changed, 23 insertions(+) > > --- a/drivers/pci/msi.c > +++ b/drivers/pci/msi.c > @@ -1553,4 +1553,26 @@ struct irq_domain *pci_msi_get_device_do > DOMAIN_BUS_PCI_MSI); > return dom; > } > + > +/** > + * pci_dev_has_special_msi_domain - Check whether the device is handled by > + * a non-standard PCI-MSI domain > + * @pdev: The PCI device to check. > + * > + * Returns: True if the device irqdomain or the bus irqdomain is > + * non-standard PCI/MSI. > + */ > +bool pci_dev_has_special_msi_domain(struct pci_dev *pdev) > +{ > + struct irq_domain *dom = dev_get_msi_domain(&pdev->dev); > + > + if (!dom) > + dom = dev_get_msi_domain(&pdev->bus->dev); > + > + if (!dom) > + return true; > + > + return dom->bus_token != DOMAIN_BUS_PCI_MSI; > +} > + > #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */ > --- a/include/linux/msi.h > +++ b/include/linux/msi.h > @@ -374,6 +374,7 @@ int pci_msi_domain_check_cap(struct irq_ > struct msi_domain_info *info, struct device *dev); > u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev); > struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev); > +bool pci_dev_has_special_msi_domain(struct pci_dev *pdev); > #else > static inline struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev) > { > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu