Some vendors, especially laptop vendors, disable these processor extensions by default. Tip: If modprobing kvm_intel or kvm_amd fails but modprobing kvm succeeds, and lscpu claims that hardware acceleration is supported, check the BIOS settings. If nothing is displayed after running either command, then your processor does not support hardware virtualization, and you will not be able to use KVM. $ grep -E -color=auto 'vmx|svm|0xc0f' /proc/cpuinfo You can check whether your processor supports hardware virtualization with the following command: KVM requires that the virtual machine host's processor has virtualization support (named VT-x for Intel processors and AMD-V for AMD processors). You should see related articles for such information.Ĭhecking support for KVM Hardware support This article does not cover features common to multiple emulators using KVM as a backend. (See Guest Support Status for more information.) Each virtual machine has private virtualized hardware: a network card, disk, graphics card, etc.ĭifferences between KVM and Xen, VMware, or QEMU can be found at the KVM FAQ. Using KVM, one can run multiple virtual machines running unmodified GNU/Linux, Windows, or any other operating system. Unlike native QEMU, which uses emulation, KVM is a special operating mode of QEMU that uses CPU extensions ( HVM) for virtualization via a kernel module. It is similar to Xen in purpose but much simpler to get running. KVM, Kernel-based Virtual Machine, is a hypervisor built into the Linux kernel.
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August 2023
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