ac5689b414
Commit missing files that actually belong to previous commits. Sponsored by: Citrix Systems R&D Approved by: gibbs
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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* Copyright (c) 2013 Roger Pau Monné <roger.pau@citrix.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/pcpu.h>
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#include <sys/smp.h>
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#include <xen/xen-os.h>
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/*
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* Dummy Xen cpu device
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*
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* Since there's no ACPI on PVH guests, we need to create a dummy
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* CPU device in order to fill the pcpu->pc_device field.
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*/
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static void
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xenpvcpu_identify(driver_t *driver, device_t parent)
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{
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int i;
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/* Only attach to PV guests, HVM guests use the ACPI CPU devices */
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if (!xen_pv_domain())
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return;
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CPU_FOREACH(i) {
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if (BUS_ADD_CHILD(parent, 0, "pvcpu", i) == NULL)
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panic("Unable to add Xen PV CPU device.");
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}
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}
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static int
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xenpvcpu_probe(device_t dev)
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{
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device_set_desc(dev, "Xen PV CPU");
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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xenpvcpu_attach(device_t dev)
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{
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struct pcpu *pc;
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int cpu;
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cpu = device_get_unit(dev);
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pc = pcpu_find(cpu);
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pc->pc_device = dev;
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return (0);
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}
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static device_method_t xenpvcpu_methods[] = {
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DEVMETHOD(device_identify, xenpvcpu_identify),
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DEVMETHOD(device_probe, xenpvcpu_probe),
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DEVMETHOD(device_attach, xenpvcpu_attach),
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DEVMETHOD_END
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};
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static driver_t xenpvcpu_driver = {
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"pvcpu",
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xenpvcpu_methods,
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0,
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};
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devclass_t xenpvcpu_devclass;
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DRIVER_MODULE(xenpvcpu, xenpv, xenpvcpu_driver, xenpvcpu_devclass, 0, 0);
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MODULE_DEPEND(xenpvcpu, xenpv, 1, 1, 1);
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