From patchwork Fri Aug 1 03:51:03 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 4660231 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 48AC49F36A for ; Fri, 1 Aug 2014 03:51:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 879CF201BF for ; Fri, 1 Aug 2014 03:51:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A9D62017A for ; Fri, 1 Aug 2014 03:51:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752102AbaHADva (ORCPT ); Thu, 31 Jul 2014 23:51:30 -0400 Received: from e28smtp04.in.ibm.com ([122.248.162.4]:46897 "EHLO e28smtp04.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751847AbaHADva (ORCPT ); Thu, 31 Jul 2014 23:51:30 -0400 Received: from /spool/local by e28smtp04.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 1 Aug 2014 09:21:27 +0530 Received: from d28dlp02.in.ibm.com (9.184.220.127) by e28smtp04.in.ibm.com (192.168.1.134) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 1 Aug 2014 09:21:26 +0530 Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 3C68F3940018 for ; Fri, 1 Aug 2014 09:21:26 +0530 (IST) Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s713pHG631916270 for ; Fri, 1 Aug 2014 09:21:17 +0530 Received: from d28av01.in.ibm.com (localhost [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s713pPOX028243 for ; Fri, 1 Aug 2014 09:21:25 +0530 Received: from shangw (shangw.cn.ibm.com [9.125.213.157]) by d28av01.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with SMTP id s713pJts028114; Fri, 1 Aug 2014 09:21:22 +0530 Received: by shangw (Postfix, from userid 1000) id D8B3D3E0267; Fri, 1 Aug 2014 13:51:04 +1000 (EST) From: Gavin Shan To: linux-pci@vger.kernel.org Cc: Gavin Shan Subject: [PATCH] PCI: Mark broken INTx masking for Mellanox devices Date: Fri, 1 Aug 2014 13:51:03 +1000 Message-Id: <1406865063-24775-1-git-send-email-gwshan@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.3.2 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14080103-5564-0000-0000-00000066B756 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The VFIO driver is routing LSI interrupts by capturing, masking, and then delivering. When passing though Mallanox adapters from host to guest, interrupt storm was reported from host and guest. That's because we can't mask the LSI interrupt with help of PCI command register. The patch marks broken INTx masking for Mellanox devices so that the VFIO driver will always mask the interrupt from interrupt controller side to avoid interrupt storm. Suggested-by: Benjamin Herrenschmidt Signed-off-by: Gavin Shan --- drivers/pci/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index d0f6926..8c2b96f 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2977,6 +2977,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CHELSIO, 0x0030, quirk_broken_intx_masking); DECLARE_PCI_FIXUP_HEADER(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */ quirk_broken_intx_masking); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MELLANOX, 0x1003, + quirk_broken_intx_masking); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MELLANOX, 0x6750, + quirk_broken_intx_masking); /* * Realtek RTL8169 PCI Gigabit Ethernet Controller (rev 10) * Subsystem: Realtek RTL8169/8110 Family PCI Gigabit Ethernet NIC