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 #include <sys/cdefs.h> 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 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 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