2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2020 Conrad Meyer <cem@FreeBSD.org>. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
46 #include <machine/vmm.h>
53 static uint64_t vmgen_gpa;
56 vmgenc_init(struct vmctx *ctx)
61 error = bootrom_alloc(ctx, PAGE_SIZE, PROT_READ, 0, ®ion,
64 errx(4, "%s: bootrom_alloc", __func__);
67 * It is basically harmless to always generate a random ID when
70 error = getentropy(region, sizeof(struct uuid));
72 err(4, "%s: getentropy", __func__);
74 /* XXX When we have suspend/resume/rollback. */
76 acpi_raise_gpe(ctx, GPE_VMGENC);
81 vmgenc_write_dsdt(void)
85 dsdt_line("Scope (_SB)");
88 dsdt_line(" Device (GENC)");
92 dsdt_line("Name (_CID, \"VM_Gen_Counter\")");
93 dsdt_line("Method (_HID, 0, NotSerialized)");
95 dsdt_line(" Return (\"Bhyve_V_Gen_Counter_V1\")");
97 dsdt_line("Name (_UID, 0)");
98 dsdt_line("Name (_DDN, \"VM_Gen_Counter\")");
99 dsdt_line("Name (ADDR, Package (0x02)");
101 dsdt_line(" 0x%08x,", (uint32_t)vmgen_gpa);
102 dsdt_line(" 0x%08x", (uint32_t)(vmgen_gpa >> 32));
106 dsdt_line(" }"); /* Device (GENC) */
108 dsdt_line("}"); /* Scope (_SB) */
111 dsdt_line("Scope (_GPE)");
113 dsdt_line(" Method (_E%02x, 0, NotSerialized)", GPE_VMGENC);
115 dsdt_line(" Notify (\\_SB.GENC, 0x80)");