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_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 51A03C433E1 for ; Fri, 21 Aug 2020 02:19:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D5AC2075E for ; Fri, 21 Aug 2020 02:19:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="yE78YKBW"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="WP3SvXjr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728266AbgHUCTH (ORCPT ); Thu, 20 Aug 2020 22:19:07 -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 ); 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 To: LKML Cc: x86@kernel.org, Jon Derrick , Joerg Roedel , iommu@lists.linux-foundation.org, linux-hyperv@vger.kernel.org, Haiyang Zhang , Lu Baolu , Wei Liu , "K. Y. Srinivasan" , Stephen Hemminger , Steve Wahl , Dimitri Sivanich , Russ Anderson , linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Jonathan Derrick , 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: [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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Jon Derrick --- include/linux/irqdomain.h | 1 + kernel/irq/msi.c | 7 ++++++- 2 files changed, 7 insertions(+), 1 deletion(-) --- 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;