554e6778b6
For GEN1 Hyper-V, vmbus is attached to pcib0, which contains the resources for PCI passthrough and SR-IOV. There is no acpi_syscontainer0 on GEN1 Hyper-V. For GEN2 Hyper-V, vmbus is attached to acpi_syscontainer0, which contains the resources for PCI passthrough and SR-IOV. There is no pcib0 on GEN2 Hyper-V. The ACPI VMBUS device now only holds its _CRS, which is empty as of this commit; its existence is mainly for upward compatibility. Device tree structure is suggested by jhb@. Tested-by: dexuan@ Collabrated-wth: dexuan@ MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D10565
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/*-
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* Copyright (c) 2017 Microsoft Corp.
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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 unmodified, this list of conditions, and the following
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* 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <dev/acpica/acpivar.h>
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#include <dev/hyperv/include/hyperv.h>
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#include "acpi_if.h"
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#include "bus_if.h"
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static int vmbus_res_probe(device_t);
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static int vmbus_res_attach(device_t);
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static int vmbus_res_detach(device_t);
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static device_method_t vmbus_res_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, vmbus_res_probe),
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DEVMETHOD(device_attach, vmbus_res_attach),
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DEVMETHOD(device_detach, vmbus_res_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD_END
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};
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static driver_t vmbus_res_driver = {
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"vmbus_res",
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vmbus_res_methods,
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1
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};
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static devclass_t vmbus_res_devclass;
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DRIVER_MODULE(vmbus_res, acpi, vmbus_res_driver, vmbus_res_devclass,
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NULL, NULL);
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MODULE_DEPEND(vmbus_res, acpi, 1, 1, 1);
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MODULE_VERSION(vmbus_res, 1);
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static int
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vmbus_res_probe(device_t dev)
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{
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char *id[] = { "VMBUS", NULL };
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if (ACPI_ID_PROBE(device_get_parent(dev), dev, id) == NULL ||
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device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV ||
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(hyperv_features & CPUID_HV_MSR_SYNIC) == 0)
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return (ENXIO);
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device_set_desc(dev, "Hyper-V Vmbus Resource");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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vmbus_res_attach(device_t dev __unused)
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{
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return (0);
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}
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static int
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vmbus_res_detach(device_t dev __unused)
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{
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return (0);
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}
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