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CONFIG_KVM_BOOK3S_64_PR: KVM support without using hypervisor mode in host

General informations

The Linux kernel configuration item CONFIG_KVM_BOOK3S_64_PR has multiple definitions:

found in arch/powerpc/kvm/Kconfig

The configuration item CONFIG_KVM_BOOK3S_64_PR:

Help text

(none)

KVM support without using hypervisor mode in host found in arch/powerpc/kvm/Kconfig

The configuration item CONFIG_KVM_BOOK3S_64_PR:

Help text

Support running guest kernels in virtual machines on processors without using hypervisor mode in the host, by running the guest in user mode (problem state) and emulating all privileged instructions and registers.

This is not as fast as using hypervisor mode, but works on machines where hypervisor mode is not available or not usable, and can emulate processors that are different from the host processor, including emulating 32-bit processors on a 64-bit host.

Hardware

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