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
51static uint64_t	vmgen_gpa;
52
53void
54vmgenc_init(struct vmctx *ctx)
55{
56	char *region;
57	int error;
58
59	error = bootrom_alloc(ctx, PAGE_SIZE, PROT_READ, 0, &region,
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
78void
79vmgenc_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