1 /*- 2 * Copyright (c) 2012 NetApp, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/pcpu.h> 34 35 #include <machine/cpufunc.h> 36 #include <machine/segments.h> 37 #include <machine/specialreg.h> 38 39 #include "vmm_host.h" 40 41 static uint64_t vmm_host_efer, vmm_host_pat, vmm_host_cr0, vmm_host_cr4; 42 43 void 44 vmm_host_state_init(void) 45 { 46 47 vmm_host_efer = rdmsr(MSR_EFER); 48 vmm_host_pat = rdmsr(MSR_PAT); 49 50 /* 51 * We always want CR0.TS to be set when the processor does a VM exit. 52 * 53 * With emulation turned on unconditionally after a VM exit, we are 54 * able to trap inadvertent use of the FPU until the guest FPU state 55 * has been safely squirreled away. 56 */ 57 vmm_host_cr0 = rcr0() | CR0_TS; 58 59 vmm_host_cr4 = rcr4(); 60 } 61 62 uint64_t 63 vmm_get_host_pat(void) 64 { 65 66 return (vmm_host_pat); 67 } 68 69 uint64_t 70 vmm_get_host_efer(void) 71 { 72 73 return (vmm_host_efer); 74 } 75 76 uint64_t 77 vmm_get_host_cr0(void) 78 { 79 80 return (vmm_host_cr0); 81 } 82 83 uint64_t 84 vmm_get_host_cr4(void) 85 { 86 87 return (vmm_host_cr4); 88 } 89 90 uint64_t 91 vmm_get_host_datasel(void) 92 { 93 94 return (GSEL(GDATA_SEL, SEL_KPL)); 95 96 } 97 98 uint64_t 99 vmm_get_host_codesel(void) 100 { 101 102 return (GSEL(GCODE_SEL, SEL_KPL)); 103 } 104 105 uint64_t 106 vmm_get_host_tsssel(void) 107 { 108 109 return (GSEL(GPROC0_SEL, SEL_KPL)); 110 } 111 112 uint64_t 113 vmm_get_host_fsbase(void) 114 { 115 116 return (0); 117 } 118 119 uint64_t 120 vmm_get_host_idtrbase(void) 121 { 122 123 return (r_idt.rd_base); 124 } 125