checking system for hardware virtualization
how does one check to see if hardware virtualization is disabled for his bios? I installed kvm virtualization files into my system (fedora) but when i "egrep '(vmx|svm)' /proc/cpuinfo"-ed, the command returned no output but the yum install returned installation complete.
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checking system for hardware virtualization
emekadavid wrote:
how does one check to see if hardware virtualization is disabled for his bios? I installed kvm virtualization files into my system (fedora) but when i "egrep '(vmx|svm)' /proc/cpuinfo"-ed, the command returned no output but the yum install returned installation complete. I saved the whole of /proc/cpuinfo for my E8400... http://ark.intel.com/products/33910/...z-1333-MHz-FSB "Intel Virtualization Technology (VT-x) - Yes" and with the BIOS enabled or disabled, the flags values are reported the same. Both strings have "vmx smx". flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm dtherm tpr_shadow vnmi flexpriority flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm dtherm tpr_shadow vnmi flexpriority My processor doesn't do VT-d, which as far as I can remember is the presence of an IOmmu. My processor has VT-x though. Linux is tricky when it comes to the BIOS. When the hardware has a "trap door", then Linux has no choice but to listen to the BIOS setting. (A trap door protected register, only accepts one write operation, and is "closed" after that.) If the hardware does not have trap door protection (for security reasons), Linux just does whatever it feels like. Some other OSes, are less presumptuous. To give an example of that, try this. Go into the BIOS, and disable the SATA port to your data hard drive (the one that doesn't have the OS on it). Now, boot Linux, and Linux will ignore the BIOS "disable" on the SATA, and enable and operate the data hard drive anyway. Paul |
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