How to check if your hardware supports virtualization

最新推荐文章于 2023-05-22 20:26:06 发布

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本文介绍了如何通过/proc/cpuinfo文件来检查CPU是否支持虚拟化技术，并解释了关键标志的意义，如vmx、svm等，这些对于理解硬件虚拟化支持至关重要。

http://virt-tools.org/learning/check-hardware-virt/

/proc/cpuinfo flags

/proc/cpuinfo will tell you if the processor supports virtualization and if it is enabled (but it could not show up in flags because it is disabled — more on this below).

The flags to look out for are:

vmx — Intel VT-x, basic virtualization
svm — AMD SVM, basic virtualization
ept — Extended Page Tables, an Intel feature to make emulation of guest page tables faster.
vpid — VPID, an Intel feature to make expensive TLB flushes unnecessary when context switching between guests.
npt — AMD Nested Page Tables, similar to EPT.
tpr_shadow and flexpriority — Intel feature that reduces calls into the hypervisor when accessing the Task Priority Register, which helps when running certain types of SMP guests.
vnmi — Intel Virtual NMI feature which helps with certain sorts of interrupt events in guests.