vmm_host.c revision 242275
1242275Sneel/*- 2242275Sneel * Copyright (c) 2012 NetApp, Inc. 3242275Sneel * All rights reserved. 4242275Sneel * 5242275Sneel * Redistribution and use in source and binary forms, with or without 6242275Sneel * modification, are permitted provided that the following conditions 7242275Sneel * are met: 8242275Sneel * 1. Redistributions of source code must retain the above copyright 9242275Sneel * notice, this list of conditions and the following disclaimer. 10242275Sneel * 2. Redistributions in binary form must reproduce the above copyright 11242275Sneel * notice, this list of conditions and the following disclaimer in the 12242275Sneel * documentation and/or other materials provided with the distribution. 13242275Sneel * 14242275Sneel * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15242275Sneel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16242275Sneel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17242275Sneel * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18242275Sneel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19242275Sneel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20242275Sneel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21242275Sneel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22242275Sneel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23242275Sneel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24242275Sneel * SUCH DAMAGE. 25242275Sneel * 26242275Sneel * $FreeBSD: projects/bhyve/sys/amd64/vmm/vmm_host.c 242275 2012-10-29 01:51:24Z neel $ 27242275Sneel */ 28242275Sneel 29242275Sneel#include <sys/cdefs.h> 30242275Sneel__FBSDID("$FreeBSD: projects/bhyve/sys/amd64/vmm/vmm_host.c 242275 2012-10-29 01:51:24Z neel $"); 31242275Sneel 32242275Sneel#include <sys/param.h> 33242275Sneel#include <sys/pcpu.h> 34242275Sneel 35242275Sneel#include <machine/cpufunc.h> 36242275Sneel#include <machine/segments.h> 37242275Sneel#include <machine/specialreg.h> 38242275Sneel 39242275Sneel#include "vmm_host.h" 40242275Sneel 41242275Sneelstatic uint64_t vmm_host_efer, vmm_host_pat, vmm_host_cr0, vmm_host_cr4; 42242275Sneel 43242275Sneelvoid 44242275Sneelvmm_host_state_init(void) 45242275Sneel{ 46242275Sneel 47242275Sneel vmm_host_efer = rdmsr(MSR_EFER); 48242275Sneel vmm_host_pat = rdmsr(MSR_PAT); 49242275Sneel 50242275Sneel /* 51242275Sneel * We always want CR0.TS to be set when the processor does a VM exit. 52242275Sneel * 53242275Sneel * With emulation turned on unconditionally after a VM exit, we are 54242275Sneel * able to trap inadvertent use of the FPU until the guest FPU state 55242275Sneel * has been safely squirreled away. 56242275Sneel */ 57242275Sneel vmm_host_cr0 = rcr0() | CR0_TS; 58242275Sneel 59242275Sneel vmm_host_cr4 = rcr4(); 60242275Sneel} 61242275Sneel 62242275Sneeluint64_t 63242275Sneelvmm_get_host_pat(void) 64242275Sneel{ 65242275Sneel 66242275Sneel return (vmm_host_pat); 67242275Sneel} 68242275Sneel 69242275Sneeluint64_t 70242275Sneelvmm_get_host_efer(void) 71242275Sneel{ 72242275Sneel 73242275Sneel return (vmm_host_efer); 74242275Sneel} 75242275Sneel 76242275Sneeluint64_t 77242275Sneelvmm_get_host_cr0(void) 78242275Sneel{ 79242275Sneel 80242275Sneel return (vmm_host_cr0); 81242275Sneel} 82242275Sneel 83242275Sneeluint64_t 84242275Sneelvmm_get_host_cr4(void) 85242275Sneel{ 86242275Sneel 87242275Sneel return (vmm_host_cr4); 88242275Sneel} 89242275Sneel 90242275Sneeluint64_t 91242275Sneelvmm_get_host_datasel(void) 92242275Sneel{ 93242275Sneel 94242275Sneel return (GSEL(GDATA_SEL, SEL_KPL)); 95242275Sneel 96242275Sneel} 97242275Sneel 98242275Sneeluint64_t 99242275Sneelvmm_get_host_codesel(void) 100242275Sneel{ 101242275Sneel 102242275Sneel return (GSEL(GCODE_SEL, SEL_KPL)); 103242275Sneel} 104242275Sneel 105242275Sneeluint64_t 106242275Sneelvmm_get_host_tsssel(void) 107242275Sneel{ 108242275Sneel 109242275Sneel return (GSEL(GPROC0_SEL, SEL_KPL)); 110242275Sneel} 111242275Sneel 112242275Sneeluint64_t 113242275Sneelvmm_get_host_fsbase(void) 114242275Sneel{ 115242275Sneel 116242275Sneel return (0); 117242275Sneel} 118242275Sneel 119242275Sneeluint64_t 120242275Sneelvmm_get_host_idtrbase(void) 121242275Sneel{ 122242275Sneel 123242275Sneel return (r_idt.rd_base); 124242275Sneel} 125