3 # tool for querying VMX capabilities
5 # Copyright 2009-2010 Red Hat, Inc.
8 # Avi Kivity <avi@redhat.com>
10 # This work is licensed under the terms of the GNU GPL, version 2. See
11 # the COPYING file in the top-level directory.
13 MSR_IA32_VMX_BASIC = 0x480
14 MSR_IA32_VMX_PINBASED_CTLS = 0x481
15 MSR_IA32_VMX_PROCBASED_CTLS = 0x482
16 MSR_IA32_VMX_EXIT_CTLS = 0x483
17 MSR_IA32_VMX_ENTRY_CTLS = 0x484
18 MSR_IA32_VMX_MISC_CTLS = 0x485
19 MSR_IA32_VMX_PROCBASED_CTLS2 = 0x48B
20 MSR_IA32_VMX_EPT_VPID_CAP = 0x48C
21 MSR_IA32_VMX_TRUE_PINBASED_CTLS = 0x48D
22 MSR_IA32_VMX_TRUE_PROCBASED_CTLS = 0x48E
23 MSR_IA32_VMX_TRUE_EXIT_CTLS = 0x48F
24 MSR_IA32_VMX_TRUE_ENTRY_CTLS = 0x490
25 MSR_IA32_VMX_VMFUNC = 0x491
30 self.f = open('/dev/cpu/0/msr', 'rb', 0)
32 self.f = open('/dev/msr0', 'rb', 0)
33 def read(self, index, default = None):
37 return struct.unpack('Q', self.f.read(8))[0]
41 class Control(object):
42 def __init__(self, name, bits, cap_msr, true_cap_msr = None):
45 self.cap_msr = cap_msr
46 self.true_cap_msr = true_cap_msr
50 return (val & 0xffffffff, val >> 32)
53 mb1, cb1 = self.read2(self.cap_msr)
56 tmb1, tcb1 = self.read2(self.true_cap_msr)
57 for bit in sorted(self.bits.keys()):
58 zero = not (mb1 & (1 << bit))
59 one = cb1 & (1 << bit)
60 true_zero = not (tmb1 & (1 << bit))
61 true_one = tcb1 & (1 << bit)
63 if (self.true_cap_msr and true_zero and true_one
64 and one and not zero):
66 elif zero and not one:
68 elif one and not zero:
72 print(' %-40s %s' % (self.bits[bit], s))
75 def __init__(self, name, bits, msr):
81 value = msr().read(self.msr, 0)
82 print(' Hex: 0x%x' % (value))
84 if type(key) is tuple:
88 for bits in sorted(self.bits.keys(), key = first_bit):
89 if type(bits) is tuple:
95 return { True: 'yes', False: 'no' }[x]
96 v = (value >> lo) & ((1 << (hi - lo + 1)) - 1)
97 print(' %-40s %s' % (self.bits[bits], fmt(v)))
101 name = 'Basic VMX Information',
104 (32,44): 'VMCS size',
105 48: 'VMCS restricted to 32 bit addresses',
106 49: 'Dual-monitor support',
107 (50, 53): 'VMCS memory type',
108 54: 'INS/OUTS instruction information',
109 55: 'IA32_VMX_TRUE_*_CTLS support',
111 msr = MSR_IA32_VMX_BASIC,
114 name = 'pin-based controls',
116 0: 'External interrupt exiting',
119 6: 'Activate VMX-preemption timer',
120 7: 'Process posted interrupts',
122 cap_msr = MSR_IA32_VMX_PINBASED_CTLS,
123 true_cap_msr = MSR_IA32_VMX_TRUE_PINBASED_CTLS,
127 name = 'primary processor-based controls',
129 2: 'Interrupt window exiting',
130 3: 'Use TSC offsetting',
136 15: 'CR3-load exiting',
137 16: 'CR3-store exiting',
138 19: 'CR8-load exiting',
139 20: 'CR8-store exiting',
140 21: 'Use TPR shadow',
141 22: 'NMI-window exiting',
142 23: 'MOV-DR exiting',
143 24: 'Unconditional I/O exiting',
144 25: 'Use I/O bitmaps',
145 27: 'Monitor trap flag',
146 28: 'Use MSR bitmaps',
147 29: 'MONITOR exiting',
149 31: 'Activate secondary control',
151 cap_msr = MSR_IA32_VMX_PROCBASED_CTLS,
152 true_cap_msr = MSR_IA32_VMX_TRUE_PROCBASED_CTLS,
156 name = 'secondary processor-based controls',
158 0: 'Virtualize APIC accesses',
160 2: 'Descriptor-table exiting',
162 4: 'Virtualize x2APIC mode',
165 7: 'Unrestricted guest',
166 8: 'APIC register emulation',
167 9: 'Virtual interrupt delivery',
168 10: 'PAUSE-loop exiting',
169 11: 'RDRAND exiting',
170 12: 'Enable INVPCID',
171 13: 'Enable VM functions',
172 14: 'VMCS shadowing',
173 15: 'Enable ENCLS exiting',
174 16: 'RDSEED exiting',
176 18: 'EPT-violation #VE',
177 19: 'Conceal non-root operation from PT',
178 20: 'Enable XSAVES/XRSTORS',
179 22: 'Mode-based execute control (XS/XU)',
180 23: 'Sub-page write permissions',
181 24: 'GPA translation for PT',
183 26: 'User wait and pause',
186 cap_msr = MSR_IA32_VMX_PROCBASED_CTLS2,
190 name = 'VM-Exit controls',
192 2: 'Save debug controls',
193 9: 'Host address-space size',
194 12: 'Load IA32_PERF_GLOBAL_CTRL',
195 15: 'Acknowledge interrupt on exit',
198 20: 'Save IA32_EFER',
199 21: 'Load IA32_EFER',
200 22: 'Save VMX-preemption timer value',
201 23: 'Clear IA32_BNDCFGS',
202 24: 'Conceal VM exits from PT',
203 25: 'Clear IA32_RTIT_CTL',
205 cap_msr = MSR_IA32_VMX_EXIT_CTLS,
206 true_cap_msr = MSR_IA32_VMX_TRUE_EXIT_CTLS,
210 name = 'VM-Entry controls',
212 2: 'Load debug controls',
213 9: 'IA-32e mode guest',
215 11: 'Deactivate dual-monitor treatment',
216 13: 'Load IA32_PERF_GLOBAL_CTRL',
218 15: 'Load IA32_EFER',
219 16: 'Load IA32_BNDCFGS',
220 17: 'Conceal VM entries from PT',
221 18: 'Load IA32_RTIT_CTL',
223 cap_msr = MSR_IA32_VMX_ENTRY_CTLS,
224 true_cap_msr = MSR_IA32_VMX_TRUE_ENTRY_CTLS,
228 name = 'Miscellaneous data',
230 (0,4): 'VMX-preemption timer scale (log2)',
231 5: 'Store EFER.LMA into IA-32e mode guest control',
232 6: 'HLT activity state',
233 7: 'Shutdown activity state',
234 8: 'Wait-for-SIPI activity state',
235 14: 'PT in VMX operation',
236 15: 'IA32_SMBASE support',
237 (16,24): 'Number of CR3-target values',
238 (25,27): 'MSR-load/store count recommendation',
239 28: 'IA32_SMM_MONITOR_CTL[2] can be set to 1',
240 29: 'VMWRITE to VM-exit information fields',
241 30: 'Inject event with insn length=0',
242 (32,63): 'MSEG revision identifier',
244 msr = MSR_IA32_VMX_MISC_CTLS,
248 name = 'VPID and EPT capabilities',
250 0: 'Execute-only EPT translations',
251 6: 'Page-walk length 4',
252 8: 'Paging-structure memory type UC',
253 14: 'Paging-structure memory type WB',
256 20: 'INVEPT supported',
257 21: 'EPT accessed and dirty flags',
258 22: 'Advanced VM-exit information for EPT violations',
259 25: 'Single-context INVEPT',
260 26: 'All-context INVEPT',
261 32: 'INVVPID supported',
262 40: 'Individual-address INVVPID',
263 41: 'Single-context INVVPID',
264 42: 'All-context INVVPID',
265 43: 'Single-context-retaining-globals INVVPID',
267 msr = MSR_IA32_VMX_EPT_VPID_CAP,
270 name = 'VM Functions',
274 msr = MSR_IA32_VMX_VMFUNC,
278 if __name__ == '__main__':