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 _at__at_ -570,3 +570,4 _at__at_ 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 _at__at_ -603,3 +603,4 _at__at_ 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 _at__at_ -0,0 +1,155 _at__at_ +/* + * Copyright (c) 2013 Roger Pau Monné <roger.pau_at_citrix.com> + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/pcpu.h> +#include <sys/smp.h> + +#include <xen/xen-os.h> + +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)Received on Thu Jan 02 2014 - 14:55:35 UTC
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