1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2020 Conrad Meyer <cem@FreeBSD.org>. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/mman.h>
30 #include <sys/uuid.h>
31
32 #include <assert.h>
33 #include <ctype.h>
34 #include <err.h>
35 #include <errno.h>
36 #include <pthread.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <strings.h>
41 #include <stdbool.h>
42 #include <unistd.h>
43
44 #include <machine/vmm.h>
45 #include <vmmapi.h>
46
47 #include "acpi.h"
48 #include "bootrom.h"
49 #include "vmgenc.h"
50
51 static uint64_t vmgen_gpa;
52
53 void
vmgenc_init(struct vmctx * ctx)54 vmgenc_init(struct vmctx *ctx)
55 {
56 char *region;
57 int error;
58
59 error = bootrom_alloc(ctx, PAGE_SIZE, PROT_READ, 0, ®ion,
60 &vmgen_gpa);
61 if (error != 0)
62 errx(4, "%s: bootrom_alloc", __func__);
63
64 /*
65 * It is basically harmless to always generate a random ID when
66 * starting a VM.
67 */
68 error = getentropy(region, sizeof(struct uuid));
69 if (error == -1)
70 err(4, "%s: getentropy", __func__);
71
72 /* XXX When we have suspend/resume/rollback. */
73 #if 0
74 acpi_raise_gpe(ctx, GPE_VMGENC);
75 #endif
76 }
77
78 void
vmgenc_write_dsdt(void)79 vmgenc_write_dsdt(void)
80 {
81 dsdt_line("");
82 dsdt_indent(1);
83 dsdt_line("Scope (_SB)");
84 dsdt_line("{");
85
86 dsdt_line(" Device (GENC)");
87 dsdt_line(" {");
88
89 dsdt_indent(2);
90 dsdt_line("Name (_CID, \"VM_Gen_Counter\")");
91 dsdt_line("Method (_HID, 0, NotSerialized)");
92 dsdt_line("{");
93 dsdt_line(" Return (\"Bhyve_V_Gen_Counter_V1\")");
94 dsdt_line("}");
95 dsdt_line("Name (_UID, 0)");
96 dsdt_line("Name (_DDN, \"VM_Gen_Counter\")");
97 dsdt_line("Name (ADDR, Package (0x02)");
98 dsdt_line("{");
99 dsdt_line(" 0x%08x,", (uint32_t)vmgen_gpa);
100 dsdt_line(" 0x%08x", (uint32_t)(vmgen_gpa >> 32));
101 dsdt_line("})");
102
103 dsdt_unindent(2);
104 dsdt_line(" }"); /* Device (GENC) */
105
106 dsdt_line("}"); /* Scope (_SB) */
107 dsdt_line("");
108
109 dsdt_line("Scope (_GPE)");
110 dsdt_line("{");
111 dsdt_line(" Method (_E%02x, 0, NotSerialized)", GPE_VMGENC);
112 dsdt_line(" {");
113 dsdt_line(" Notify (\\_SB.GENC, 0x80)");
114 dsdt_line(" }");
115 dsdt_line("}");
116 dsdt_unindent(1);
117 }
118