1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 /* 29 * This file and its contents are supplied under the terms of the 30 * Common Development and Distribution License ("CDDL"), version 1.0. 31 * You may only use this file in accordance with the terms of version 32 * 1.0 of the CDDL. 33 * 34 * A full copy of the text of the CDDL should have accompanied this 35 * source. A copy of the CDDL is also available via the Internet at 36 * http://www.illumos.org/license/CDDL. 37 * 38 * Copyright 2020 Oxide Computer Company 39 */ 40 41 #include <sys/cdefs.h> 42 43 #include <sys/param.h> 44 #include <sys/types.h> 45 46 #include <machine/vmm.h> 47 #include <vmmapi.h> 48 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <assert.h> 52 53 #include "bhyverun.h" 54 #include "spinup_ap.h" 55 56 #ifdef __FreeBSD__ 57 static void 58 spinup_ap_realmode(struct vcpu *newcpu, uint64_t rip) 59 { 60 int vector, error; 61 uint16_t cs; 62 uint64_t desc_base; 63 uint32_t desc_limit, desc_access; 64 65 vector = rip >> PAGE_SHIFT; 66 67 /* 68 * Update the %cs and %rip of the guest so that it starts 69 * executing real mode code at at 'vector << 12'. 70 */ 71 error = vm_set_register(newcpu, VM_REG_GUEST_RIP, 0); 72 assert(error == 0); 73 74 error = vm_get_desc(newcpu, VM_REG_GUEST_CS, &desc_base, 75 &desc_limit, &desc_access); 76 assert(error == 0); 77 78 desc_base = vector << PAGE_SHIFT; 79 error = vm_set_desc(newcpu, VM_REG_GUEST_CS, 80 desc_base, desc_limit, desc_access); 81 assert(error == 0); 82 83 cs = (vector << PAGE_SHIFT) >> 4; 84 error = vm_set_register(newcpu, VM_REG_GUEST_CS, cs); 85 assert(error == 0); 86 } 87 #endif /* __FreeBSD__ */ 88 89 void 90 spinup_ap(struct vcpu *newcpu, uint64_t rip) 91 { 92 int error; 93 94 error = vcpu_reset(newcpu); 95 assert(error == 0); 96 97 #ifdef __FreeBSD__ 98 spinup_ap_realmode(newcpu, rip); 99 100 vm_resume_cpu(newcpu); 101 #endif 102 } 103