1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/*-
* Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
* Copyright (c) 2013 Roger Pau Monné <roger.pau@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/smp.h>
#include <sys/pcpu.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/intr_machdep.h>
#include <x86/apicvar.h>
#include <machine/cpu.h>
#include <machine/smp.h>
#include <xen/xen-os.h>
#include <xen/hypervisor.h>
#include <xen/interface/vcpu.h>
static int xenpv_probe(void);
static int xenpv_probe_cpus(void);
static int xenpv_setup_local(void);
static int xenpv_setup_io(void);
static struct apic_enumerator xenpv_enumerator = {
"Xen PV",
xenpv_probe,
xenpv_probe_cpus,
xenpv_setup_local,
xenpv_setup_io
};
/*
* This enumerator will only be registered on PVH
*/
static int
xenpv_probe(void)
{
return (-100);
}
/*
* Test each possible vCPU in order to find the number of vCPUs
*/
static int
xenpv_probe_cpus(void)
{
#ifdef SMP
int i, ret;
for (i = 0; i < MAXCPU; i++) {
ret = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
if (ret >= 0)
lapic_create((i * 2), (i == 0));
}
#endif
return (0);
}
/*
* Initialize the vCPU id of the BSP
*/
static int
xenpv_setup_local(void)
{
PCPU_SET(vcpu_id, 0);
lapic_init(0);
return (0);
}
/*
* On PVH guests there's no IO APIC
*/
static int
xenpv_setup_io(void)
{
return (0);
}
static void
xenpv_register(void *dummy __unused)
{
if (xen_pv_domain()) {
apic_register_enumerator(&xenpv_enumerator);
}
}
SYSINIT(xenpv_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, xenpv_register, NULL);
/*
* Setup per-CPU vCPU IDs
*/
static void
xenpv_set_ids(void *dummy)
{
struct pcpu *pc;
int i;
CPU_FOREACH(i) {
pc = pcpu_find(i);
pc->pc_vcpu_id = i;
}
}
SYSINIT(xenpv_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, xenpv_set_ids, NULL);
|
