9c4c8b62fb
remains. Xen is planning to phase out support for PV upstream since it is harder to maintain and has more overhead. Modern x86 CPUs include virtualization extensions that support HVM guests instead of PV guests. In addition, the PV code was i386 only and not as well maintained recently as the HVM code. - Remove the i386-only NATIVE option that was used to disable certain components for PV kernels. These components are now standard as they are on amd64. - Remove !XENHVM bits from PV drivers. - Remove various shims required for XEN (e.g. PT_UPDATES_FLUSH, LOAD_CR3, etc.) - Remove duplicate copy of <xen/features.h>. - Remove unused, i386-only xenstored.h. Differential Revision: https://reviews.freebsd.org/D2362 Reviewed by: royger Tested by: royger (i386/amd64 HVM domU and amd64 PVH dom0) Relnotes: yes
168 lines
4.3 KiB
C
168 lines
4.3 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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/smp.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 <x86/init.h>
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#include <machine/nexusvar.h>
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#include <machine/intr_machdep.h>
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#include <xen/xen-os.h>
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#include <xen/xen_intr.h>
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#include <xen/xen_msi.h>
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#include "pcib_if.h"
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/*
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* Xen nexus(4) driver.
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*/
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static int
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nexus_xen_probe(device_t dev)
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{
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if (!xen_pv_domain())
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return (ENXIO);
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return (BUS_PROBE_SPECIFIC);
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}
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static int
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nexus_xen_attach(device_t dev)
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{
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int error;
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device_t acpi_dev = NULL;
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nexus_init_resources();
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bus_generic_probe(dev);
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if (xen_initial_domain()) {
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/* Disable some ACPI devices that are not usable by Dom0 */
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acpi_cpu_disabled = true;
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acpi_hpet_disabled = true;
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acpi_timer_disabled = true;
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acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
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if (acpi_dev == NULL)
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panic("Unable to add ACPI bus to Xen Dom0");
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}
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error = bus_generic_attach(dev);
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if (xen_initial_domain() && (error == 0))
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acpi_install_wakeup_handler(device_get_softc(acpi_dev));
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return (error);
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}
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static int
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nexus_xen_config_intr(device_t dev, int irq, enum intr_trigger trig,
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enum intr_polarity pol)
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{
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int ret;
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/*
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* ISA and PCI intline IRQs are not preregistered on Xen, so
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* intercept calls to configure those and register them on the fly.
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*/
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if ((irq < FIRST_MSI_INT) && (intr_lookup_source(irq) == NULL)) {
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ret = xen_register_pirq(irq, trig, pol);
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if (ret != 0)
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return (ret);
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nexus_add_irq(irq);
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}
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return (intr_config_intr(irq, trig, pol));
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}
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static int
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nexus_xen_alloc_msix(device_t pcib, device_t dev, int *irq)
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{
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return (xen_msix_alloc(dev, irq));
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}
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static int
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nexus_xen_release_msix(device_t pcib, device_t dev, int irq)
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{
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return (xen_msix_release(irq));
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}
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static int
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nexus_xen_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
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{
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return (xen_msi_alloc(dev, count, maxcount, irqs));
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}
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static int
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nexus_xen_release_msi(device_t pcib, device_t dev, int count, int *irqs)
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{
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return (xen_msi_release(irqs, count));
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}
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static int
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nexus_xen_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
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{
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return (xen_msi_map(irq, addr, data));
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}
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static device_method_t nexus_xen_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, nexus_xen_probe),
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DEVMETHOD(device_attach, nexus_xen_attach),
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/* INTR */
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DEVMETHOD(bus_config_intr, nexus_xen_config_intr),
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/* MSI */
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DEVMETHOD(pcib_alloc_msi, nexus_xen_alloc_msi),
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DEVMETHOD(pcib_release_msi, nexus_xen_release_msi),
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DEVMETHOD(pcib_alloc_msix, nexus_xen_alloc_msix),
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DEVMETHOD(pcib_release_msix, nexus_xen_release_msix),
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DEVMETHOD(pcib_map_msi, nexus_xen_map_msi),
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{ 0, 0 }
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};
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DEFINE_CLASS_1(nexus, nexus_xen_driver, nexus_xen_methods, 1, nexus_driver);
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static devclass_t nexus_devclass;
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DRIVER_MODULE(nexus_xen, root, nexus_xen_driver, nexus_devclass, 0, 0);
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