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-rwxr-xr-xscripts/kvm/vmxcap260
1 files changed, 260 insertions, 0 deletions
diff --git a/scripts/kvm/vmxcap b/scripts/kvm/vmxcap
new file mode 100755
index 00000000..8f0371f4
--- /dev/null
+++ b/scripts/kvm/vmxcap
@@ -0,0 +1,260 @@
+#!/usr/bin/python
+#
+# tool for querying VMX capabilities
+#
+# Copyright 2009-2010 Red Hat, Inc.
+#
+# Authors:
+# Avi Kivity <avi@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2. See
+# the COPYING file in the top-level directory.
+
+MSR_IA32_VMX_BASIC = 0x480
+MSR_IA32_VMX_PINBASED_CTLS = 0x481
+MSR_IA32_VMX_PROCBASED_CTLS = 0x482
+MSR_IA32_VMX_EXIT_CTLS = 0x483
+MSR_IA32_VMX_ENTRY_CTLS = 0x484
+MSR_IA32_VMX_MISC_CTLS = 0x485
+MSR_IA32_VMX_PROCBASED_CTLS2 = 0x48B
+MSR_IA32_VMX_EPT_VPID_CAP = 0x48C
+MSR_IA32_VMX_TRUE_PINBASED_CTLS = 0x48D
+MSR_IA32_VMX_TRUE_PROCBASED_CTLS = 0x48E
+MSR_IA32_VMX_TRUE_EXIT_CTLS = 0x48F
+MSR_IA32_VMX_TRUE_ENTRY_CTLS = 0x490
+MSR_IA32_VMX_VMFUNC = 0x491
+
+class msr(object):
+ def __init__(self):
+ try:
+ self.f = open('/dev/cpu/0/msr', 'r', 0)
+ except:
+ self.f = open('/dev/msr0', 'r', 0)
+ def read(self, index, default = None):
+ import struct
+ self.f.seek(index)
+ try:
+ return struct.unpack('Q', self.f.read(8))[0]
+ except:
+ return default
+
+class Control(object):
+ def __init__(self, name, bits, cap_msr, true_cap_msr = None):
+ self.name = name
+ self.bits = bits
+ self.cap_msr = cap_msr
+ self.true_cap_msr = true_cap_msr
+ def read2(self, nr):
+ m = msr()
+ val = m.read(nr, 0)
+ return (val & 0xffffffff, val >> 32)
+ def show(self):
+ print self.name
+ mbz, mb1 = self.read2(self.cap_msr)
+ tmbz, tmb1 = 0, 0
+ if self.true_cap_msr:
+ tmbz, tmb1 = self.read2(self.true_cap_msr)
+ for bit in sorted(self.bits.keys()):
+ zero = not (mbz & (1 << bit))
+ one = mb1 & (1 << bit)
+ true_zero = not (tmbz & (1 << bit))
+ true_one = tmb1 & (1 << bit)
+ s= '?'
+ if (self.true_cap_msr and true_zero and true_one
+ and one and not zero):
+ s = 'default'
+ elif zero and not one:
+ s = 'no'
+ elif one and not zero:
+ s = 'forced'
+ elif one and zero:
+ s = 'yes'
+ print ' %-40s %s' % (self.bits[bit], s)
+
+class Misc(object):
+ def __init__(self, name, bits, msr):
+ self.name = name
+ self.bits = bits
+ self.msr = msr
+ def show(self):
+ print self.name
+ value = msr().read(self.msr, 0)
+ def first_bit(key):
+ if type(key) is tuple:
+ return key[0]
+ else:
+ return key
+ for bits in sorted(self.bits.keys(), key = first_bit):
+ if type(bits) is tuple:
+ lo, hi = bits
+ fmt = int
+ else:
+ lo = hi = bits
+ def fmt(x):
+ return { True: 'yes', False: 'no' }[x]
+ v = (value >> lo) & ((1 << (hi - lo + 1)) - 1)
+ print ' %-40s %s' % (self.bits[bits], fmt(v))
+
+controls = [
+ Misc(
+ name = 'Basic VMX Information',
+ bits = {
+ (0, 30): 'Revision',
+ (32,44): 'VMCS size',
+ 48: 'VMCS restricted to 32 bit addresses',
+ 49: 'Dual-monitor support',
+ (50, 53): 'VMCS memory type',
+ 54: 'INS/OUTS instruction information',
+ 55: 'IA32_VMX_TRUE_*_CTLS support',
+ },
+ msr = MSR_IA32_VMX_BASIC,
+ ),
+ Control(
+ name = 'pin-based controls',
+ bits = {
+ 0: 'External interrupt exiting',
+ 3: 'NMI exiting',
+ 5: 'Virtual NMIs',
+ 6: 'Activate VMX-preemption timer',
+ 7: 'Process posted interrupts',
+ },
+ cap_msr = MSR_IA32_VMX_PINBASED_CTLS,
+ true_cap_msr = MSR_IA32_VMX_TRUE_PINBASED_CTLS,
+ ),
+
+ Control(
+ name = 'primary processor-based controls',
+ bits = {
+ 2: 'Interrupt window exiting',
+ 3: 'Use TSC offsetting',
+ 7: 'HLT exiting',
+ 9: 'INVLPG exiting',
+ 10: 'MWAIT exiting',
+ 11: 'RDPMC exiting',
+ 12: 'RDTSC exiting',
+ 15: 'CR3-load exiting',
+ 16: 'CR3-store exiting',
+ 19: 'CR8-load exiting',
+ 20: 'CR8-store exiting',
+ 21: 'Use TPR shadow',
+ 22: 'NMI-window exiting',
+ 23: 'MOV-DR exiting',
+ 24: 'Unconditional I/O exiting',
+ 25: 'Use I/O bitmaps',
+ 27: 'Monitor trap flag',
+ 28: 'Use MSR bitmaps',
+ 29: 'MONITOR exiting',
+ 30: 'PAUSE exiting',
+ 31: 'Activate secondary control',
+ },
+ cap_msr = MSR_IA32_VMX_PROCBASED_CTLS,
+ true_cap_msr = MSR_IA32_VMX_TRUE_PROCBASED_CTLS,
+ ),
+
+ Control(
+ name = 'secondary processor-based controls',
+ bits = {
+ 0: 'Virtualize APIC accesses',
+ 1: 'Enable EPT',
+ 2: 'Descriptor-table exiting',
+ 3: 'Enable RDTSCP',
+ 4: 'Virtualize x2APIC mode',
+ 5: 'Enable VPID',
+ 6: 'WBINVD exiting',
+ 7: 'Unrestricted guest',
+ 8: 'APIC register emulation',
+ 9: 'Virtual interrupt delivery',
+ 10: 'PAUSE-loop exiting',
+ 11: 'RDRAND exiting',
+ 12: 'Enable INVPCID',
+ 13: 'Enable VM functions',
+ 14: 'VMCS shadowing',
+ 16: 'RDSEED exiting',
+ 18: 'EPT-violation #VE',
+ 20: 'Enable XSAVES/XRSTORS',
+ },
+ cap_msr = MSR_IA32_VMX_PROCBASED_CTLS2,
+ ),
+
+ Control(
+ name = 'VM-Exit controls',
+ bits = {
+ 2: 'Save debug controls',
+ 9: 'Host address-space size',
+ 12: 'Load IA32_PERF_GLOBAL_CTRL',
+ 15: 'Acknowledge interrupt on exit',
+ 18: 'Save IA32_PAT',
+ 19: 'Load IA32_PAT',
+ 20: 'Save IA32_EFER',
+ 21: 'Load IA32_EFER',
+ 22: 'Save VMX-preemption timer value',
+ },
+ cap_msr = MSR_IA32_VMX_EXIT_CTLS,
+ true_cap_msr = MSR_IA32_VMX_TRUE_EXIT_CTLS,
+ ),
+
+ Control(
+ name = 'VM-Entry controls',
+ bits = {
+ 2: 'Load debug controls',
+ 9: 'IA-32e mode guest',
+ 10: 'Entry to SMM',
+ 11: 'Deactivate dual-monitor treatment',
+ 13: 'Load IA32_PERF_GLOBAL_CTRL',
+ 14: 'Load IA32_PAT',
+ 15: 'Load IA32_EFER',
+ },
+ cap_msr = MSR_IA32_VMX_ENTRY_CTLS,
+ true_cap_msr = MSR_IA32_VMX_TRUE_ENTRY_CTLS,
+ ),
+
+ Misc(
+ name = 'Miscellaneous data',
+ bits = {
+ (0,4): 'VMX-preemption timer scale (log2)',
+ 5: 'Store EFER.LMA into IA-32e mode guest control',
+ 6: 'HLT activity state',
+ 7: 'Shutdown activity state',
+ 8: 'Wait-for-SIPI activity state',
+ 15: 'IA32_SMBASE support',
+ (16,24): 'Number of CR3-target values',
+ (25,27): 'MSR-load/store count recommendation',
+ 28: 'IA32_SMM_MONITOR_CTL[2] can be set to 1',
+ 29: 'VMWRITE to VM-exit information fields',
+ (32,63): 'MSEG revision identifier',
+ },
+ msr = MSR_IA32_VMX_MISC_CTLS,
+ ),
+
+ Misc(
+ name = 'VPID and EPT capabilities',
+ bits = {
+ 0: 'Execute-only EPT translations',
+ 6: 'Page-walk length 4',
+ 8: 'Paging-structure memory type UC',
+ 14: 'Paging-structure memory type WB',
+ 16: '2MB EPT pages',
+ 17: '1GB EPT pages',
+ 20: 'INVEPT supported',
+ 21: 'EPT accessed and dirty flags',
+ 25: 'Single-context INVEPT',
+ 26: 'All-context INVEPT',
+ 32: 'INVVPID supported',
+ 40: 'Individual-address INVVPID',
+ 41: 'Single-context INVVPID',
+ 42: 'All-context INVVPID',
+ 43: 'Single-context-retaining-globals INVVPID',
+ },
+ msr = MSR_IA32_VMX_EPT_VPID_CAP,
+ ),
+ Misc(
+ name = 'VM Functions',
+ bits = {
+ 0: 'EPTP Switching',
+ },
+ msr = MSR_IA32_VMX_VMFUNC,
+ ),
+ ]
+
+for c in controls:
+ c.show()
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 12:25:02 +0000