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=-8.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 A27F8C433DF for ; Tue, 25 Aug 2020 20:16:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 81D742075F for ; Tue, 25 Aug 2020 20:16:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598386601; bh=D7Rw2PMoe8IDZOMsNEwXYiBG5PbxcS/orkj8Yivovec=; h=Date:From:To:Cc:Subject:In-Reply-To:List-ID:From; b=hX6C96SkFSkRmPgXYUxpDLjCtGWxgar0KL2Mnw1ySK11U43vkmCaYmky0aE7jpbVH EsuY48foBPqwIgCcLaYG/X6zVIfDJ03SRfq49td5EkOBrfwE9RYz+gobRu0QVsel9Z IOu4m3xCSxanWN6N1loa1rxKVKTOe+XV4YYsD++U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726336AbgHYUQi (ORCPT ); Tue, 25 Aug 2020 16:16:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:55876 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726149AbgHYUQh (ORCPT ); Tue, 25 Aug 2020 16:16:37 -0400 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 Cc: LKML , x86@kernel.org, Bjorn Helgaas , linux-pci@vger.kernel.org, Joerg Roedel , iommu@lists.linux-foundation.org, linux-hyperv@vger.kernel.org, Haiyang Zhang , Jon Derrick , Lu Baolu , Wei Liu , "K. Y. Srinivasan" , Stephen Hemminger , Steve Wahl , Dimitri Sivanich , Russ Anderson , Lorenzo Pieralisi , Konrad Rzeszutek Wilk , xen-devel@lists.xenproject.org, Juergen Gross , Boris Ostrovsky , Stefano Stabellini , Marc Zyngier , Greg Kroah-Hartman , "Rafael J. Wysocki" , Megha Dey , Jason Gunthorpe , Dave Jiang , Alex Williamson , Jacob Pan , Baolu Lu , Kevin Tian , Dan Williams 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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200821002947.373714034@linutronix.de> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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) > { >