diff options
Diffstat (limited to 'scripts/kvm/vmxcap')
| -rwxr-xr-x | scripts/kvm/vmxcap | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/scripts/kvm/vmxcap b/scripts/kvm/vmxcap new file mode 100755 index 0000000000..a74ce71917 --- /dev/null +++ b/scripts/kvm/vmxcap @@ -0,0 +1,224 @@ +#!/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 + +class msr(object): + def __init__(self): + try: + self.f = file('/dev/cpu/0/msr') + except: + self.f = file('/dev/msr0') + 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 = [ + Control( + name = 'pin-based controls', + bits = { + 0: 'External interrupt exiting', + 3: 'NMI exiting', + 5: 'Virtual NMIs', + 6: 'Activate VMX-preemption timer', + }, + 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', + 4: 'Virtualize x2APIC mode', + 5: 'Enable VPID', + 6: 'WBINVD exiting', + 7: 'Unrestricted guest', + 10: 'PAUSE-loop exiting', + }, + 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-64 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', + (16,24): 'Number of CR3-target values', + (25,27): 'MSR-load/store count recommenation', + (32,62): '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', + 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, + ), + ] + +for c in controls: + c.show() |