[PATCH 2/2] qemu: Generate command line for tb-cache feature

[Kashyap Chamarthy]

On Thu, Nov 04, 2021 at 01:22:53PM +0100, Michal Privoznik wrote:
> Alright, here's the deal: to enable tb-cache one has to use
> '-accel tcg,tb-size=' which then conflicts with '-machine
> accel=tcg'. But sure, we can use the old -accel in this specific
> case. But because of how the tb-size argument is defined in QEMU
> there's no way for us to have a capability check. The feature was
> introduced in QEMU commit of v5.0.0-rc0~175^2~62 and is tied to
> TCG only. Therefore, I think we can live without capability
> check. Worst case scenario, QEMU fails to start.

Hmm, you write: "... we can use the old -accel",  I was told by Paolo
Bonzini the other day that "-accel" is preferred  instead of "-machine
accel".   Hence I filed this GitLab ticket a couple of days:

    https://gitlab.com/libvirt/libvirt/-/issues/233 (Use `-accel`
    instead of `-machine accel`)

[...]

-- 
/kashyap