135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
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/*-
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* Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
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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/smp.h>
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#include <sys/pcpu.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/intr_machdep.h>
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#include <x86/apicvar.h>
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#include <machine/cpu.h>
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#include <machine/smp.h>
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#include <xen/xen-os.h>
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#include <xen/hypervisor.h>
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#include <xen/interface/vcpu.h>
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static int xenpv_probe(void);
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static int xenpv_probe_cpus(void);
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static int xenpv_setup_local(void);
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static int xenpv_setup_io(void);
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static struct apic_enumerator xenpv_enumerator = {
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"Xen PV",
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xenpv_probe,
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xenpv_probe_cpus,
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xenpv_setup_local,
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xenpv_setup_io
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};
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/*
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* This enumerator will only be registered on PVH
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*/
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static int
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xenpv_probe(void)
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{
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return (-100);
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}
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/*
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* Test each possible vCPU in order to find the number of vCPUs
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*/
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static int
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xenpv_probe_cpus(void)
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{
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#ifdef SMP
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int i, ret;
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for (i = 0; i < MAXCPU; i++) {
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ret = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
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if (ret >= 0)
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lapic_create((i * 2), (i == 0));
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}
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#endif
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return (0);
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}
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/*
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* Initialize the vCPU id of the BSP
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*/
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static int
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xenpv_setup_local(void)
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{
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PCPU_SET(vcpu_id, 0);
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lapic_init(0);
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return (0);
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}
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/*
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* On PVH guests there's no IO APIC
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*/
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static int
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xenpv_setup_io(void)
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{
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return (0);
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}
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static void
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xenpv_register(void *dummy __unused)
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{
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if (xen_pv_domain()) {
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apic_register_enumerator(&xenpv_enumerator);
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}
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}
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SYSINIT(xenpv_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, xenpv_register, NULL);
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/*
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* Setup per-CPU vCPU IDs
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*/
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static void
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xenpv_set_ids(void *dummy)
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{
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struct pcpu *pc;
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int i;
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CPU_FOREACH(i) {
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pc = pcpu_find(i);
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pc->pc_vcpu_id = i;
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}
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}
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SYSINIT(xenpv_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, xenpv_set_ids, NULL);
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