From patchwork Thu Jan 10 13:48:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Anthony PERARD X-Patchwork-Id: 10755821 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 18E6C14DE for ; Thu, 10 Jan 2019 13:58:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0858929031 for ; Thu, 10 Jan 2019 13:58:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F0CBB2984F; Thu, 10 Jan 2019 13:58:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8554329031 for ; Thu, 10 Jan 2019 13:58:10 +0000 (UTC) Received: from localhost ([127.0.0.1]:55235 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ghaqX-0003Ez-I2 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 10 Jan 2019 08:58:09 -0500 Received: from eggs.gnu.org ([209.51.188.92]:53185) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ghail-00053i-9C for qemu-devel@nongnu.org; Thu, 10 Jan 2019 08:50:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ghaik-0001go-6V for qemu-devel@nongnu.org; Thu, 10 Jan 2019 08:50:07 -0500 Received: from smtp03.citrix.com ([162.221.156.55]:11318) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ghaij-0001ep-U9 for qemu-devel@nongnu.org; Thu, 10 Jan 2019 08:50:06 -0500 X-IronPort-AV: E=Sophos;i="5.56,461,1539648000"; d="scan'208";a="75262378" From: Anthony PERARD To: Date: Thu, 10 Jan 2019 13:48:54 +0000 Message-ID: <20190110134917.16425-3-anthony.perard@citrix.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190110134917.16425-1-anthony.perard@citrix.com> References: <20190110134917.16425-1-anthony.perard@citrix.com> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 162.221.156.55 Subject: [Qemu-devel] [PULL 02/25] xen/pt: allow passthrough of devices with bogus interrupt pin X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anthony PERARD , xen-devel@lists.xenproject.org, Zhao Yan Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Zhao Yan For some pci device, even its PCI_INTERRUPT_PIN is not 0, it actually doesn't support INTx mode, so its machine irq read from host sysfs is 0. In that case, report PCI_INTERRUPT_PIN as 0 to guest and let passthrough continue. Reviewed-by: Roger Pau Monné Signed-off-by: Zhao Yan Acked-by: Anthony PERARD Signed-off-by: Anthony PERARD --- hw/xen/xen_pt.c | 6 ++++++ hw/xen/xen_pt_config_init.c | 4 +++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c index f1f3a3727c..815dc46ba7 100644 --- a/hw/xen/xen_pt.c +++ b/hw/xen/xen_pt.c @@ -847,6 +847,12 @@ static void xen_pt_realize(PCIDevice *d, Error **errp) } machine_irq = s->real_device.irq; + if (machine_irq == 0) { + XEN_PT_LOG(d, "machine irq is 0\n"); + cmd |= PCI_COMMAND_INTX_DISABLE; + goto out; + } + rc = xc_physdev_map_pirq(xen_xc, xen_domid, machine_irq, &pirq); if (rc < 0) { error_setg_errno(errp, errno, "Mapping machine irq %u to" diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c index 47f9010c75..9fd953a689 100644 --- a/hw/xen/xen_pt_config_init.c +++ b/hw/xen/xen_pt_config_init.c @@ -300,7 +300,9 @@ static int xen_pt_irqpin_reg_init(XenPCIPassthroughState *s, XenPTRegInfo *reg, uint32_t real_offset, uint32_t *data) { - *data = xen_pt_pci_read_intx(s); + if (s->real_device.irq) { + *data = xen_pt_pci_read_intx(s); + } return 0; }