From patchwork Fri Aug 21 00:24:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11727415 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 14FE5138C for ; Fri, 21 Aug 2020 02:27:10 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 E498F207BB for ; Fri, 21 Aug 2020 02:27:09 +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" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E498F207BB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1k8wlL-00057e-P8; Fri, 21 Aug 2020 02:26:39 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1k8wca-0002BQ-Ue for xen-devel@lists.xenproject.org; Fri, 21 Aug 2020 02:17:36 +0000 X-Inumbo-ID: 50e7ff84-5f3a-47b7-b3f9-747f978dc6ad Received: from galois.linutronix.de (unknown [2a0a:51c0:0:12e:550::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 50e7ff84-5f3a-47b7-b3f9-747f978dc6ad; Fri, 21 Aug 2020 02:17:02 +0000 (UTC) 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-Disposition: inline; filename="genirq-msi--Provide-DOMAIN_BUS_VMD_MSI.patch" Content-transfer-encoding: 8-bit X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" 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;