1#!/usr/bin/python 2# 3# tool for querying VMX capabilities 4# 5# Copyright 2009-2010 Red Hat, Inc. 6# 7# Authors: 8# Avi Kivity <avi@redhat.com> 9# 10# This work is licensed under the terms of the GNU GPL, version 2. See 11# the COPYING file in the top-level directory. 12 13MSR_IA32_VMX_BASIC = 0x480 14MSR_IA32_VMX_PINBASED_CTLS = 0x481 15MSR_IA32_VMX_PROCBASED_CTLS = 0x482 16MSR_IA32_VMX_EXIT_CTLS = 0x483 17MSR_IA32_VMX_ENTRY_CTLS = 0x484 18MSR_IA32_VMX_MISC_CTLS = 0x485 19MSR_IA32_VMX_PROCBASED_CTLS2 = 0x48B 20MSR_IA32_VMX_EPT_VPID_CAP = 0x48C 21MSR_IA32_VMX_TRUE_PINBASED_CTLS = 0x48D 22MSR_IA32_VMX_TRUE_PROCBASED_CTLS = 0x48E 23MSR_IA32_VMX_TRUE_EXIT_CTLS = 0x48F 24MSR_IA32_VMX_TRUE_ENTRY_CTLS = 0x490 25MSR_IA32_VMX_VMFUNC = 0x491 26 27class msr(object): 28 def __init__(self): 29 try: 30 self.f = open('/dev/cpu/0/msr', 'r', 0) 31 except: 32 self.f = open('/dev/msr0', 'r', 0) 33 def read(self, index, default = None): 34 import struct 35 self.f.seek(index) 36 try: 37 return struct.unpack('Q', self.f.read(8))[0] 38 except: 39 return default 40 41class Control(object): 42 def __init__(self, name, bits, cap_msr, true_cap_msr = None): 43 self.name = name 44 self.bits = bits 45 self.cap_msr = cap_msr 46 self.true_cap_msr = true_cap_msr 47 def read2(self, nr): 48 m = msr() 49 val = m.read(nr, 0) 50 return (val & 0xffffffff, val >> 32) 51 def show(self): 52 print self.name 53 mbz, mb1 = self.read2(self.cap_msr) 54 tmbz, tmb1 = 0, 0 55 if self.true_cap_msr: 56 tmbz, tmb1 = self.read2(self.true_cap_msr) 57 for bit in sorted(self.bits.keys()): 58 zero = not (mbz & (1 << bit)) 59 one = mb1 & (1 << bit) 60 true_zero = not (tmbz & (1 << bit)) 61 true_one = tmb1 & (1 << bit) 62 s= '?' 63 if (self.true_cap_msr and true_zero and true_one 64 and one and not zero): 65 s = 'default' 66 elif zero and not one: 67 s = 'no' 68 elif one and not zero: 69 s = 'forced' 70 elif one and zero: 71 s = 'yes' 72 print ' %-40s %s' % (self.bits[bit], s) 73 74class Misc(object): 75 def __init__(self, name, bits, msr): 76 self.name = name 77 self.bits = bits 78 self.msr = msr 79 def show(self): 80 print self.name 81 value = msr().read(self.msr, 0) 82 def first_bit(key): 83 if type(key) is tuple: 84 return key[0] 85 else: 86 return key 87 for bits in sorted(self.bits.keys(), key = first_bit): 88 if type(bits) is tuple: 89 lo, hi = bits 90 fmt = int 91 else: 92 lo = hi = bits 93 def fmt(x): 94 return { True: 'yes', False: 'no' }[x] 95 v = (value >> lo) & ((1 << (hi - lo + 1)) - 1) 96 print ' %-40s %s' % (self.bits[bits], fmt(v)) 97 98controls = [ 99 Misc( 100 name = 'Basic VMX Information', 101 bits = { 102 (0, 30): 'Revision', 103 (32,44): 'VMCS size', 104 48: 'VMCS restricted to 32 bit addresses', 105 49: 'Dual-monitor support', 106 (50, 53): 'VMCS memory type', 107 54: 'INS/OUTS instruction information', 108 55: 'IA32_VMX_TRUE_*_CTLS support', 109 }, 110 msr = MSR_IA32_VMX_BASIC, 111 ), 112 Control( 113 name = 'pin-based controls', 114 bits = { 115 0: 'External interrupt exiting', 116 3: 'NMI exiting', 117 5: 'Virtual NMIs', 118 6: 'Activate VMX-preemption timer', 119 7: 'Process posted interrupts', 120 }, 121 cap_msr = MSR_IA32_VMX_PINBASED_CTLS, 122 true_cap_msr = MSR_IA32_VMX_TRUE_PINBASED_CTLS, 123 ), 124 125 Control( 126 name = 'primary processor-based controls', 127 bits = { 128 2: 'Interrupt window exiting', 129 3: 'Use TSC offsetting', 130 7: 'HLT exiting', 131 9: 'INVLPG exiting', 132 10: 'MWAIT exiting', 133 11: 'RDPMC exiting', 134 12: 'RDTSC exiting', 135 15: 'CR3-load exiting', 136 16: 'CR3-store exiting', 137 19: 'CR8-load exiting', 138 20: 'CR8-store exiting', 139 21: 'Use TPR shadow', 140 22: 'NMI-window exiting', 141 23: 'MOV-DR exiting', 142 24: 'Unconditional I/O exiting', 143 25: 'Use I/O bitmaps', 144 27: 'Monitor trap flag', 145 28: 'Use MSR bitmaps', 146 29: 'MONITOR exiting', 147 30: 'PAUSE exiting', 148 31: 'Activate secondary control', 149 }, 150 cap_msr = MSR_IA32_VMX_PROCBASED_CTLS, 151 true_cap_msr = MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 152 ), 153 154 Control( 155 name = 'secondary processor-based controls', 156 bits = { 157 0: 'Virtualize APIC accesses', 158 1: 'Enable EPT', 159 2: 'Descriptor-table exiting', 160 3: 'Enable RDTSCP', 161 4: 'Virtualize x2APIC mode', 162 5: 'Enable VPID', 163 6: 'WBINVD exiting', 164 7: 'Unrestricted guest', 165 8: 'APIC register emulation', 166 9: 'Virtual interrupt delivery', 167 10: 'PAUSE-loop exiting', 168 11: 'RDRAND exiting', 169 12: 'Enable INVPCID', 170 13: 'Enable VM functions', 171 14: 'VMCS shadowing', 172 16: 'RDSEED exiting', 173 18: 'EPT-violation #VE', 174 20: 'Enable XSAVES/XRSTORS', 175 }, 176 cap_msr = MSR_IA32_VMX_PROCBASED_CTLS2, 177 ), 178 179 Control( 180 name = 'VM-Exit controls', 181 bits = { 182 2: 'Save debug controls', 183 9: 'Host address-space size', 184 12: 'Load IA32_PERF_GLOBAL_CTRL', 185 15: 'Acknowledge interrupt on exit', 186 18: 'Save IA32_PAT', 187 19: 'Load IA32_PAT', 188 20: 'Save IA32_EFER', 189 21: 'Load IA32_EFER', 190 22: 'Save VMX-preemption timer value', 191 }, 192 cap_msr = MSR_IA32_VMX_EXIT_CTLS, 193 true_cap_msr = MSR_IA32_VMX_TRUE_EXIT_CTLS, 194 ), 195 196 Control( 197 name = 'VM-Entry controls', 198 bits = { 199 2: 'Load debug controls', 200 9: 'IA-32e mode guest', 201 10: 'Entry to SMM', 202 11: 'Deactivate dual-monitor treatment', 203 13: 'Load IA32_PERF_GLOBAL_CTRL', 204 14: 'Load IA32_PAT', 205 15: 'Load IA32_EFER', 206 }, 207 cap_msr = MSR_IA32_VMX_ENTRY_CTLS, 208 true_cap_msr = MSR_IA32_VMX_TRUE_ENTRY_CTLS, 209 ), 210 211 Misc( 212 name = 'Miscellaneous data', 213 bits = { 214 (0,4): 'VMX-preemption timer scale (log2)', 215 5: 'Store EFER.LMA into IA-32e mode guest control', 216 6: 'HLT activity state', 217 7: 'Shutdown activity state', 218 8: 'Wait-for-SIPI activity state', 219 15: 'IA32_SMBASE support', 220 (16,24): 'Number of CR3-target values', 221 (25,27): 'MSR-load/store count recommendation', 222 28: 'IA32_SMM_MONITOR_CTL[2] can be set to 1', 223 29: 'VMWRITE to VM-exit information fields', 224 (32,63): 'MSEG revision identifier', 225 }, 226 msr = MSR_IA32_VMX_MISC_CTLS, 227 ), 228 229 Misc( 230 name = 'VPID and EPT capabilities', 231 bits = { 232 0: 'Execute-only EPT translations', 233 6: 'Page-walk length 4', 234 8: 'Paging-structure memory type UC', 235 14: 'Paging-structure memory type WB', 236 16: '2MB EPT pages', 237 17: '1GB EPT pages', 238 20: 'INVEPT supported', 239 21: 'EPT accessed and dirty flags', 240 25: 'Single-context INVEPT', 241 26: 'All-context INVEPT', 242 32: 'INVVPID supported', 243 40: 'Individual-address INVVPID', 244 41: 'Single-context INVVPID', 245 42: 'All-context INVVPID', 246 43: 'Single-context-retaining-globals INVVPID', 247 }, 248 msr = MSR_IA32_VMX_EPT_VPID_CAP, 249 ), 250 Misc( 251 name = 'VM Functions', 252 bits = { 253 0: 'EPTP Switching', 254 }, 255 msr = MSR_IA32_VMX_VMFUNC, 256 ), 257 ] 258 259for c in controls: 260 c.show() 261