Message ID | 20200821002947.168173557@linutronix.de |
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State | New |
Headers | show
Return-Path: <linux-pci-owner@vger.kernel.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=<UNKNOWN>) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=yE78YKBW; dkim=pass header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=WP3SvXjr; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BXlZW16rpz9sTK for <incoming@patchwork.ozlabs.org>; Fri, 21 Aug 2020 12:19:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728025AbgHUCTG (ORCPT <rfc822;incoming@patchwork.ozlabs.org>); Thu, 20 Aug 2020 22:19:06 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:52910 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727787AbgHUCRE (ORCPT <rfc822;linux-pci@vger.kernel.org>); Thu, 20 Aug 2020 22:17:04 -0400 Message-Id: <20200821002947.168173557@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1597976221; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=Xil47Xitq/gy2CFriIqkg6fmKg4rUeNmWQC3UIIAE6w=; b=yE78YKBWeQJNRno/mhgAqmoyeOTKFwnOmAuRZQ5SkOa0rdPcXDsezUiMafpbmddhT8YtRx Q48PBPl5MCz8RE+vKQS6FvAoswzKSqltLT8dz4hEt8NfisI3WqmgK4DKoERYansXMAOCPd EwBdwb4DFqgc98F1KE4se7KtWer9ytqTsAhj9vGzByVYJQv/UCteKvlg8RR+c36Z6ixDcJ BD6gKlCjCebIEAR5oyxn66+VkJnohi7LOi/o0l5x7UMgjimXfDEJyg400bRHlBN1oBEuWP fTTG6828E//dV9xRZEjoWhFP+b/n2Z4ZMMIf+ezYaZKeZkEJp8dyTlXQ87/pZg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1597976221; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=Xil47Xitq/gy2CFriIqkg6fmKg4rUeNmWQC3UIIAE6w=; b=WP3SvXjrxQ5y0nFAbsID3Pj/5cUANa6inm+6T4+n98lsoiLiw/u7pX1jx+Twz/Mxho32Av rocr6eby1iKkoNCA== Date: Fri, 21 Aug 2020 02:24:43 +0200 From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: x86@kernel.org, Jon Derrick <jonathan.derrick@intel.com>, Joerg Roedel <joro@8bytes.org>, iommu@lists.linux-foundation.org, linux-hyperv@vger.kernel.org, Haiyang Zhang <haiyangz@microsoft.com>, Lu Baolu <baolu.lu@linux.intel.com>, Wei Liu <wei.liu@kernel.org>, "K. Y. Srinivasan" <kys@microsoft.com>, Stephen Hemminger <sthemmin@microsoft.com>, Steve Wahl <steve.wahl@hpe.com>, Dimitri Sivanich <sivanich@hpe.com>, Russ Anderson <rja@hpe.com>, linux-pci@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Jonathan Derrick <jonathan.derrick@intel.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, xen-devel@lists.xenproject.org, Juergen Gross <jgross@suse.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Stefano Stabellini <sstabellini@kernel.org>, Marc Zyngier <maz@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Rafael J. Wysocki" <rafael@kernel.org>, Megha Dey <megha.dey@intel.com>, Jason Gunthorpe <jgg@mellanox.com>, Dave Jiang <dave.jiang@intel.com>, Alex Williamson <alex.williamson@redhat.com>, Jacob Pan <jacob.jun.pan@intel.com>, Baolu Lu <baolu.lu@intel.com>, Kevin Tian <kevin.tian@intel.com>, Dan Williams <dan.j.williams@intel.com> Subject: [patch RFC 19/38] irqdomain/msi: Provide DOMAIN_BUS_VMD_MSI References: <20200821002424.119492231@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline; filename="genirq-msi--Provide-DOMAIN_BUS_VMD_MSI.patch" Content-transfer-encoding: 8-bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: <linux-pci.vger.kernel.org> X-Mailing-List: linux-pci@vger.kernel.org |
Series |
x86, PCI, XEN, genirq ...: Prepare for device MSI
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--- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -84,6 +84,7 @@ enum irq_domain_bus_token { DOMAIN_BUS_FSL_MC_MSI, DOMAIN_BUS_TI_SCI_INTA_MSI, DOMAIN_BUS_WAKEUP, + DOMAIN_BUS_VMD_MSI, }; /** --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -370,8 +370,13 @@ static bool msi_check_reservation_mode(s { struct msi_desc *desc; - if (domain->bus_token != DOMAIN_BUS_PCI_MSI) + switch(domain->bus_token) { + case DOMAIN_BUS_PCI_MSI: + case DOMAIN_BUS_VMD_MSI: + break; + default: return false; + } if (!(info->flags & MSI_FLAG_MUST_REACTIVATE)) return false;
PCI devices behind a VMD bus are not subject to interrupt remapping, but the irq domain for VMD MSI cannot be distinguished from a regular PCI/MSI irq domain. Add a new domain bus token and allow it in the bus token check in msi_check_reservation_mode() to keep the functionality the same once VMD uses this token. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jon Derrick <jonathan.derrick@intel.com> --- include/linux/irqdomain.h | 1 + kernel/irq/msi.c | 7 ++++++- 2 files changed, 7 insertions(+), 1 deletion(-)