1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/mman.h> 32 #include <sys/uuid.h> 33 34 #include <assert.h> 35 #include <ctype.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <pthread.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <strings.h> 43 #include <stdbool.h> 44 #include <unistd.h> 45 46 #include <machine/vmm.h> 47 #include <vmmapi.h> 48 49 #include "acpi.h" 50 #include "bootrom.h" 51 #include "vmgenc.h" 52 53 static uint64_t vmgen_gpa; 54 55 void 56 vmgenc_init(struct vmctx *ctx) 57 { 58 char *region; 59 int error; 60 61 error = bootrom_alloc(ctx, PAGE_SIZE, PROT_READ, 0, ®ion, 62 &vmgen_gpa); 63 if (error != 0) 64 errx(4, "%s: bootrom_alloc", __func__); 65 66 /* 67 * It is basically harmless to always generate a random ID when 68 * starting a VM. 69 */ 70 error = getentropy(region, sizeof(struct uuid)); 71 if (error == -1) 72 err(4, "%s: getentropy", __func__); 73 74 /* XXX When we have suspend/resume/rollback. */ 75 #if 0 76 acpi_raise_gpe(ctx, GPE_VMGENC); 77 #endif 78 } 79 80 void 81 vmgenc_write_dsdt(void) 82 { 83 dsdt_line(""); 84 dsdt_indent(1); 85 dsdt_line("Scope (_SB)"); 86 dsdt_line("{"); 87 88 dsdt_line(" Device (GENC)"); 89 dsdt_line(" {"); 90 91 dsdt_indent(2); 92 dsdt_line("Name (_CID, \"VM_Gen_Counter\")"); 93 dsdt_line("Method (_HID, 0, NotSerialized)"); 94 dsdt_line("{"); 95 dsdt_line(" Return (\"Bhyve_V_Gen_Counter_V1\")"); 96 dsdt_line("}"); 97 dsdt_line("Name (_UID, 0)"); 98 dsdt_line("Name (_DDN, \"VM_Gen_Counter\")"); 99 dsdt_line("Name (ADDR, Package (0x02)"); 100 dsdt_line("{"); 101 dsdt_line(" 0x%08x,", (uint32_t)vmgen_gpa); 102 dsdt_line(" 0x%08x", (uint32_t)(vmgen_gpa >> 32)); 103 dsdt_line("})"); 104 105 dsdt_unindent(2); 106 dsdt_line(" }"); /* Device (GENC) */ 107 108 dsdt_line("}"); /* Scope (_SB) */ 109 dsdt_line(""); 110 111 dsdt_line("Scope (_GPE)"); 112 dsdt_line("{"); 113 dsdt_line(" Method (_E%02x, 0, NotSerialized)", GPE_VMGENC); 114 dsdt_line(" {"); 115 dsdt_line(" Notify (\\_SB.GENC, 0x80)"); 116 dsdt_line(" }"); 117 dsdt_line("}"); 118 dsdt_unindent(1); 119 } 120