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 2013 Pluribus Networks Inc. 39 */ 40 41 #include <sys/cdefs.h> 42 43 #include <sys/param.h> 44 #include <sys/libkern.h> 45 46 #include <machine/md_var.h> 47 48 #include "vmm_util.h" 49 50 bool 51 vmm_is_intel(void) 52 { 53 54 return (strcmp(cpu_vendor, "GenuineIntel") == 0); 55 } 56 57 bool 58 vmm_is_svm(void) 59 { 60 return (strcmp(cpu_vendor, "AuthenticAMD") == 0 || 61 strcmp(cpu_vendor, "HygonGenuine") == 0); 62 } 63 64 bool 65 vmm_supports_1G_pages(void) 66 { 67 unsigned int regs[4]; 68 69 /* 70 * CPUID.80000001:EDX[bit 26] = 1 indicates support for 1GB pages 71 * 72 * Both Intel and AMD support this bit. 73 */ 74 if (cpu_exthigh >= 0x80000001) { 75 do_cpuid(0x80000001, regs); 76 if (regs[3] & (1 << 26)) 77 return (true); 78 } 79 return (false); 80 } 81