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Re: [Qemu-devel] did the qemu can emulate the whole system with the proc

From: Alex Bennée
Subject: Re: [Qemu-devel] did the qemu can emulate the whole system with the processor that without support the "virtulization and kvm"?
Date: Fri, 21 Dec 2018 09:01:02 +0000
User-agent: mu4e 1.1.0; emacs 26.1.90

tugouxp <address@hidden> writes:

> Hi alex:
>     now my host machine did not have the "/dev/kvm" nodes and no chance to 
> make it exists.
> so i want to know whether the "/dev/kvm" is  mandatory  for qemu to emulate 
> the whole system.
> so i can make the emulation without the support of kvm mechanism.

QEMU runs in two modes - full system emulation with TCG doesn't require
KVM although it is relatively slow. On systems where there guest
architecture is the same as the host architecture you can run with KMV
(or HAX/WHPX/HVF) accelerators at near native speeds.

The reasons for not having a /dev/kvm can vary but you haven't said what
your host architecture is and what OS you are running so it's hard to
offer advice here.

Alex Bennée

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