Re: [Qemu-devel] [PATCH] accel: Improve selection of the default accelerator

[Peter Maydell]

On 5 October 2018 at 15:13, Thomas Huth <address@hidden> wrote:
> When compiling with "--disable-tcg", we currently still use "tcg"
> as default accelerator. "kvm" should be used in this case instead.

This part is non-controversial and makes good sense.

> Also, some downstream distros provide QEMU binaries which have "kvm"
> in their names (e.g. "qemu-kvm" on RHEL or "kvm" on Ubuntu) that use
> KVM by default - and some users might want to do something similar
> with upstream binaries, too. Accomodate them by using "kvm:tcg" as
> default when we detect such a binary name.

This part is much riskier and less clearly a good plan --
do we really want our behaviour to vary based on the name
of the executable? Distros who want that sort of qemu-kvm
wrapper generally are providing it already (the Ubuntu one
is a 2-line shell script).

thanks
-- PMM