2 * Copyright (c) 2012 NetApp, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
35 #include <machine/cpufunc.h>
36 #include <machine/segments.h>
37 #include <machine/specialreg.h>
41 static uint64_t vmm_host_efer, vmm_host_pat, vmm_host_cr0, vmm_host_cr4;
44 vmm_host_state_init(void)
47 vmm_host_efer = rdmsr(MSR_EFER);
48 vmm_host_pat = rdmsr(MSR_PAT);
51 * We always want CR0.TS to be set when the processor does a VM exit.
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.
57 vmm_host_cr0 = rcr0() | CR0_TS;
59 vmm_host_cr4 = rcr4();
63 vmm_get_host_pat(void)
66 return (vmm_host_pat);
70 vmm_get_host_efer(void)
73 return (vmm_host_efer);
77 vmm_get_host_cr0(void)
80 return (vmm_host_cr0);
84 vmm_get_host_cr4(void)
87 return (vmm_host_cr4);
91 vmm_get_host_datasel(void)
94 return (GSEL(GDATA_SEL, SEL_KPL));
99 vmm_get_host_codesel(void)
102 return (GSEL(GCODE_SEL, SEL_KPL));
106 vmm_get_host_tsssel(void)
109 return (GSEL(GPROC0_SEL, SEL_KPL));
113 vmm_get_host_fsbase(void)
120 vmm_get_host_idtrbase(void)
123 return (r_idt.rd_base);