| vmm_host.c (245652) | vmm_host.c (261638) |
|---|---|
| 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 unchanged lines hidden (view full) --- 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 * | 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 unchanged lines hidden (view full) --- 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: head/sys/amd64/vmm/vmm_host.c 242275 2012-10-29 01:51:24Z neel $ | 26 * $FreeBSD: head/sys/amd64/vmm/vmm_host.c 261638 2014-02-08 16:37:54Z jhb $ |
| 27 */ 28 29#include <sys/cdefs.h> | 27 */ 28 29#include <sys/cdefs.h> |
| 30__FBSDID("$FreeBSD: head/sys/amd64/vmm/vmm_host.c 242275 2012-10-29 01:51:24Z neel $"); | 30__FBSDID("$FreeBSD: head/sys/amd64/vmm/vmm_host.c 261638 2014-02-08 16:37:54Z jhb $"); |
| 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 | 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 |
| 41static uint64_t vmm_host_efer, vmm_host_pat, vmm_host_cr0, vmm_host_cr4; | 41static uint64_t vmm_host_efer, vmm_host_pat, vmm_host_cr0, vmm_host_cr4, 42 vmm_host_xcr0; 43static struct xsave_limits vmm_xsave_limits; |
| 42 43void 44vmm_host_state_init(void) 45{ | 44 45void 46vmm_host_state_init(void) 47{ |
| 48 int regs[4]; |
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| 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(); | 49 50 vmm_host_efer = rdmsr(MSR_EFER); 51 vmm_host_pat = rdmsr(MSR_PAT); 52 53 /* 54 * We always want CR0.TS to be set when the processor does a VM exit. 55 * 56 * With emulation turned on unconditionally after a VM exit, we are 57 * able to trap inadvertent use of the FPU until the guest FPU state 58 * has been safely squirreled away. 59 */ 60 vmm_host_cr0 = rcr0() | CR0_TS; 61 62 vmm_host_cr4 = rcr4(); |
| 63 64 /* 65 * Only permit a guest to use XSAVE if the host is using 66 * XSAVE. Only permit a guest to use XSAVE features supported 67 * by the host. This ensures that the FPU state used by the 68 * guest is always a subset of the saved guest FPU state. 69 */ 70 if (vmm_host_cr4 & CR4_XSAVE) { 71 vmm_xsave_limits.xsave_enabled = 1; 72 vmm_host_xcr0 = rxcr(0); 73 vmm_xsave_limits.xcr0_allowed = vmm_host_xcr0; 74 75 cpuid_count(0xd, 0x0, regs); 76 vmm_xsave_limits.xsave_max_size = regs[1]; 77 } |
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| 60} 61 62uint64_t 63vmm_get_host_pat(void) 64{ 65 66 return (vmm_host_pat); 67} --- 15 unchanged lines hidden (view full) --- 83uint64_t 84vmm_get_host_cr4(void) 85{ 86 87 return (vmm_host_cr4); 88} 89 90uint64_t | 78} 79 80uint64_t 81vmm_get_host_pat(void) 82{ 83 84 return (vmm_host_pat); 85} --- 15 unchanged lines hidden (view full) --- 101uint64_t 102vmm_get_host_cr4(void) 103{ 104 105 return (vmm_host_cr4); 106} 107 108uint64_t |
| 109vmm_get_host_xcr0(void) 110{ 111 112 return (vmm_host_xcr0); 113} 114 115uint64_t |
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| 91vmm_get_host_datasel(void) 92{ 93 94 return (GSEL(GDATA_SEL, SEL_KPL)); 95 96} 97 98uint64_t --- 18 unchanged lines hidden (view full) --- 117} 118 119uint64_t 120vmm_get_host_idtrbase(void) 121{ 122 123 return (r_idt.rd_base); 124} | 116vmm_get_host_datasel(void) 117{ 118 119 return (GSEL(GDATA_SEL, SEL_KPL)); 120 121} 122 123uint64_t --- 18 unchanged lines hidden (view full) --- 142} 143 144uint64_t 145vmm_get_host_idtrbase(void) 146{ 147 148 return (r_idt.rd_base); 149} |
| 150 151const struct xsave_limits * 152vmm_get_xsave_limits(void) 153{ 154 155 return (&vmm_xsave_limits); 156} |
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