Re: QEMU in F8/9

On Mon, Jul 14, 2008 at 3:12 PM, Kevin Kofler <kevin.kofler@xxxxxxxxx> wrote:
Mogens Kjaer <mk <at> crc.dk> writes:
Before creating a virtualized process, check that the CPU does
virtualization AND that it is enabled in the BIOS.

Actually regular QEMU doesn't use hardware virtualization, you have to use KVM
to use it.

QEMU without kqemu = pure software emulation, no hardware support required, can
emulate other architectures (e.g. x86_64 on a 32-bit x86 host), very slow
QEMU with kqemu = software virtualization, does not need hardware
virtualization support, but does need kernel support (kmod-kqemu) and can only
emulate its own architecture (e.g. no x86_64 emulation on 32-bit hosts)
KVM (which uses QEMU) = hardware virtualization using the hardware
virtualization support in recent CPUs, needs kernel support, but such support
is included in current upstream and Fedora kernels, can only emulate x86 and
x86_64 (and I'm not sure whether it's possible to run x86_64 KVM VMs on a
32-bit x86 host)

Kevin Kofler

That's what I thought, but had no evidence. Thanks for clarifying.

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