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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011 NetApp, Inc.
* 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 NETAPP, INC ``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 NETAPP, INC 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.
*
* $FreeBSD$
*/
/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*
* Copyright 2020 Oxide Computer Company
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/linker_set.h>
#include <sys/_iovec.h>
#include <sys/mman.h>
#include <x86/psl.h>
#include <x86/segments.h>
#include <machine/vmm.h>
#include <vmmapi.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "bhyverun.h"
#include "config.h"
#include "inout.h"
SET_DECLARE(inout_port_set, struct inout_port);
#define MAX_IOPORTS (1 << 16)
#define VERIFY_IOPORT(port, size) \
assert((port) >= 0 && (size) > 0 && ((port) + (size)) <= MAX_IOPORTS)
struct inout_handler {
const char *name;
int flags;
inout_func_t handler;
void *arg;
};
static struct inout_handler inout_handlers[MAX_IOPORTS];
static int
default_inout(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
uint32_t *eax, void *arg)
{
if (in) {
switch (bytes) {
case 4:
*eax = 0xffffffff;
break;
case 2:
*eax = 0xffff;
break;
case 1:
*eax = 0xff;
break;
}
}
return (0);
}
static void
register_default_iohandler(int start, int size)
{
struct inout_port iop;
VERIFY_IOPORT(start, size);
bzero(&iop, sizeof(iop));
iop.name = "default";
iop.port = start;
iop.size = size;
iop.flags = IOPORT_F_INOUT | IOPORT_F_DEFAULT;
iop.handler = default_inout;
register_inout(&iop);
}
int
emulate_inout(struct vmctx *ctx, int vcpu, struct vm_inout *inout)
{
struct inout_handler handler;
inout_func_t hfunc;
void *harg;
int error;
uint8_t bytes;
bool in;
bytes = inout->bytes;
in = (inout->flags & INOUT_IN) != 0;
assert(bytes == 1 || bytes == 2 || bytes == 4);
handler = inout_handlers[inout->port];
hfunc = handler.handler;
harg = handler.arg;
if (hfunc == default_inout &&
get_config_bool_default("x86.strictio", false))
return (-1);
if (in) {
if (!(handler.flags & IOPORT_F_IN))
return (-1);
} else {
if (!(handler.flags & IOPORT_F_OUT))
return (-1);
}
error = hfunc(ctx, vcpu, in, inout->port, bytes, &inout->eax, harg);
return (error);
}
void
init_inout(void)
{
struct inout_port **iopp, *iop;
/*
* Set up the default handler for all ports
*/
register_default_iohandler(0, MAX_IOPORTS);
/*
* Overwrite with specified handlers
*/
SET_FOREACH(iopp, inout_port_set) {
iop = *iopp;
assert(iop->port < MAX_IOPORTS);
inout_handlers[iop->port].name = iop->name;
inout_handlers[iop->port].flags = iop->flags;
inout_handlers[iop->port].handler = iop->handler;
inout_handlers[iop->port].arg = NULL;
}
}
int
register_inout(struct inout_port *iop)
{
int i;
VERIFY_IOPORT(iop->port, iop->size);
/*
* Verify that the new registration is not overwriting an already
* allocated i/o range.
*/
if ((iop->flags & IOPORT_F_DEFAULT) == 0) {
for (i = iop->port; i < iop->port + iop->size; i++) {
if ((inout_handlers[i].flags & IOPORT_F_DEFAULT) == 0)
return (-1);
}
}
for (i = iop->port; i < iop->port + iop->size; i++) {
inout_handlers[i].name = iop->name;
inout_handlers[i].flags = iop->flags;
inout_handlers[i].handler = iop->handler;
inout_handlers[i].arg = iop->arg;
}
return (0);
}
int
unregister_inout(struct inout_port *iop)
{
VERIFY_IOPORT(iop->port, iop->size);
assert(inout_handlers[iop->port].name == iop->name);
register_default_iohandler(iop->port, iop->size);
return (0);
}
|
