From owner-freebsd-xen@FreeBSD.ORG Thu Jan 2 15:55:35 2014 Return-Path: Delivered-To: freebsd-xen@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8E5FBE87; Thu, 2 Jan 2014 15:55:35 +0000 (UTC) Received: from SMTP.CITRIX.COM (smtp.citrix.com [66.165.176.89]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id C4EE515DF; Thu, 2 Jan 2014 15:55:33 +0000 (UTC) X-IronPort-AV: E=Sophos;i="4.95,591,1384300800"; d="scan'208";a="89262682" Received: from accessns.citrite.net (HELO FTLPEX01CL01.citrite.net) ([10.9.154.239]) by FTLPIPO01.CITRIX.COM with ESMTP; 02 Jan 2014 15:55:33 +0000 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.78) with Microsoft SMTP Server id 14.2.342.4; Thu, 2 Jan 2014 10:55:32 -0500 Received: from gateway-cbg.eng.citrite.net ([10.80.16.17] helo=localhost.localdomain) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1VykRH-00043n-L9; Thu, 02 Jan 2014 15:44:03 +0000 From: Roger Pau Monne To: , , , , , , Subject: =?UTF-8?q?=5BPATCH=20v9=2014/19=5D=20xen=3A=20introduce=20xenpv=20bus=20and=20a=20dummy=20pvcpu=20device?= Date: Thu, 2 Jan 2014 16:43:48 +0100 Message-ID: <1388677433-49525-15-git-send-email-roger.pau@citrix.com> X-Mailer: git-send-email 1.7.7.5 (Apple Git-26) In-Reply-To: <1388677433-49525-1-git-send-email-roger.pau@citrix.com> References: <1388677433-49525-1-git-send-email-roger.pau@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-DLP: MIA2 X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Jan 2014 15:55:35 -0000 Since Xen PVH guests doesn't have ACPI, we need to create a dummy bus so top level Xen devices can attach to it (instead of attaching directly to the nexus) and a pvcpu device that will be used to fill the pcpu->pc_device field. --- sys/conf/files.amd64 | 1 + sys/conf/files.i386 | 1 + sys/x86/xen/xenpv.c | 155 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 157 insertions(+), 0 deletions(-) create mode 100644 sys/x86/xen/xenpv.c diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64 index a3491da..d7c98cc 100644 --- a/sys/conf/files.amd64 +++ b/sys/conf/files.amd64 @@ -570,3 +570,4 @@ x86/xen/hvm.c optional xenhvm x86/xen/xen_intr.c optional xen | xenhvm x86/xen/pv.c optional xenhvm x86/xen/pvcpu_enum.c optional xenhvm +x86/xen/xenpv.c optional xenhvm diff --git a/sys/conf/files.i386 b/sys/conf/files.i386 index 790296d..81142e3 100644 --- a/sys/conf/files.i386 +++ b/sys/conf/files.i386 @@ -603,3 +603,4 @@ x86/x86/tsc.c standard x86/x86/delay.c standard x86/xen/hvm.c optional xenhvm x86/xen/xen_intr.c optional xen | xenhvm +x86/xen/xenpv.c optional xen | xenhvm diff --git a/sys/x86/xen/xenpv.c b/sys/x86/xen/xenpv.c new file mode 100644 index 0000000..41d674f --- /dev/null +++ b/sys/x86/xen/xenpv.c @@ -0,0 +1,155 @@ +/* + * Copyright (c) 2013 Roger Pau Monné + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include + +#include + +static int +xenpv_probe(device_t dev) +{ + + device_set_desc(dev, "Xen PV bus"); + device_quiet(dev); + return (0); +} + +static int +xenpv_attach(device_t dev) +{ + device_t child; + + /* + * Let our child drivers identify any child devices that they + * can find. Once that is done attach any devices that we + * found. + */ + bus_generic_probe(dev); + bus_generic_attach(dev); + + if (!devclass_get_device(devclass_find("isa"), 0)) { + child = BUS_ADD_CHILD(dev, 0, "isa", 0); + if (child == NULL) + panic("xenpv_attach isa"); + device_probe_and_attach(child); + } + + return 0; +} + +static device_method_t xenpv_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, xenpv_probe), + DEVMETHOD(device_attach, xenpv_attach), + DEVMETHOD(device_suspend, bus_generic_suspend), + DEVMETHOD(device_resume, bus_generic_resume), + + /* Bus interface */ + DEVMETHOD(bus_add_child, bus_generic_add_child), + + DEVMETHOD_END +}; + +static driver_t xenpv_driver = { + "xenpv", + xenpv_methods, + 1, /* no softc */ +}; +static devclass_t xenpv_devclass; + +DRIVER_MODULE(xenpv, nexus, xenpv_driver, xenpv_devclass, 0, 0); + +/* + * Dummy Xen cpu device + * + * Since there's no ACPI on PVH guests, we need to create a dummy + * CPU device in order to fill the pcpu->pc_device field. + */ + +static void +xenpvcpu_identify(driver_t *driver, device_t parent) +{ + device_t child; + int i; + + /* Only attach to PV guests, HVM guests use the ACPI CPU devices */ + if (!xen_pv_domain()) + return; + + CPU_FOREACH(i) { + child = BUS_ADD_CHILD(parent, 0, "pvcpu", i); + if (child == NULL) + panic("xenpvcpu_identify add pvcpu"); + } +} + +static int +xenpvcpu_probe(device_t dev) +{ + + device_set_desc(dev, "Xen PV CPU"); + return (0); +} + +static int +xenpvcpu_attach(device_t dev) +{ + struct pcpu *pc; + int cpu; + + cpu = device_get_unit(dev); + pc = pcpu_find(cpu); + pc->pc_device = dev; + return (0); +} + +static device_method_t xenpvcpu_methods[] = { + DEVMETHOD(device_identify, xenpvcpu_identify), + DEVMETHOD(device_probe, xenpvcpu_probe), + DEVMETHOD(device_attach, xenpvcpu_attach), + + DEVMETHOD_END +}; + +static driver_t xenpvcpu_driver = { + "pvcpu", + xenpvcpu_methods, + 0, +}; + +devclass_t xenpvcpu_devclass; + +DRIVER_MODULE(xenpvcpu, xenpv, xenpvcpu_driver, xenpvcpu_devclass, 0, 0); +MODULE_DEPEND(xenpvcpu, xenpv, 1, 1, 1); -- 1.7.7.5 (Apple Git-26)