1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 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 2014 Pluribus Networks Inc. 39 * Copyright 2018 Joyent, Inc. 40 * Copyright 2020 Oxide Computer Company 41 */ 42 43 #include <sys/cdefs.h> 44 45 #include <sys/param.h> 46 #include <sys/pcpu.h> 47 #include <sys/systm.h> 48 #include <sys/sysctl.h> 49 #include <sys/x86_archext.h> 50 51 #include <machine/clock.h> 52 #include <machine/cpufunc.h> 53 #include <machine/md_var.h> 54 #include <machine/segments.h> 55 #include <machine/specialreg.h> 56 57 #include <machine/vmm.h> 58 #include <sys/vmm_kernel.h> 59 60 #include "vmm_host.h" 61 #include "vmm_util.h" 62 63 /* 64 * Return 'true' if the capability 'cap' is enabled in this virtual cpu 65 * and 'false' otherwise. 66 */ 67 bool 68 vm_cpuid_capability(struct vm *vm, int vcpuid, enum vm_cpuid_capability cap) 69 { 70 bool rv; 71 72 KASSERT(cap > 0 && cap < VCC_LAST, ("%s: invalid vm_cpu_capability %d", 73 __func__, cap)); 74 75 /* 76 * Simply passthrough the capabilities of the host cpu for now. 77 */ 78 rv = false; 79 switch (cap) { 80 #ifdef __FreeBSD__ 81 case VCC_NO_EXECUTE: 82 if (amd_feature & AMDID_NX) 83 rv = true; 84 break; 85 case VCC_FFXSR: 86 if (amd_feature & AMDID_FFXSR) 87 rv = true; 88 break; 89 case VCC_TCE: 90 if (amd_feature2 & AMDID2_TCE) 91 rv = true; 92 break; 93 #else 94 case VCC_NO_EXECUTE: 95 if (is_x86_feature(x86_featureset, X86FSET_NX)) 96 rv = true; 97 break; 98 /* XXXJOY: No kernel detection for FFXR or TCE at present, so ignore */ 99 case VCC_FFXSR: 100 case VCC_TCE: 101 break; 102 #endif 103 default: 104 panic("%s: unknown vm_cpu_capability %d", __func__, cap); 105 } 106 return (rv); 107 } 108 109 bool 110 validate_guest_xcr0(uint64_t val, uint64_t limit_mask) 111 { 112 /* x87 feature must be enabled */ 113 if ((val & XFEATURE_ENABLED_X87) == 0) { 114 return (false); 115 } 116 /* AVX cannot be enabled without SSE */ 117 if ((val & (XFEATURE_ENABLED_SSE | XFEATURE_ENABLED_AVX)) == 118 XFEATURE_ENABLED_SSE) { 119 return (false); 120 } 121 /* No bits should be outside what we dictate to be allowed */ 122 if ((val & ~limit_mask) != 0) { 123 return (false); 124 } 125 126 return (true); 127 } 128