Re: [gentoo-user] Running old RHEL as a VM on Ryzen

[Michael]

On Wednesday, 14 April 2021 10:28:32 BST Adam Carter wrote:
> > > I tried running an old version of RHEL with an old 3.x kernel in
> > > VirtualBox, however, it won't run due to my hosts Ryzen CPU so I
> > > guess I need something that does CPU emulation.
> > >
> > > Is this likely to be achievable with qemu ?
> >
> > Yes. Look up the release date of your kernel[1] and pick a slightly
> > older CPU[2].
> >
> > [1] <
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/refs/>
> > [2] <https://qemu.readthedocs.io/en/latest/system/qemu-cpu-models.html>.
>
> Great.
>
> Ok i see 3.10 was released 2013-06-30, so looking for a cpu released the
> previous year, say
> IvyBridge, IvyBridge-IBR Intel Xeon E3-12xx v2 (Ivy Bridge, 2012)
>
> and $ qemu-system-x86_64 -cpu ? | grep -i ivy
> x86 IvyBridge             (alias configured by machine type)
>
> x86 IvyBridge-IBRS        (alias of IvyBridge-v2)
>
> x86 IvyBridge-v1          Intel Xeon E3-12xx v2 (Ivy Bridge)
>
> x86 IvyBridge-v2          Intel Xeon E3-12xx v2 (Ivy Bridge, IBRS)
>
>
> So if I run the following then RHEL will think it's running on an IvyBridge
> cpu, right?
> $ qemu-system-x86_64 -cpu 'x86 IvyBridge-v1' etc

Try:

qemu-system-x86_64 -cpu IvyBridge-v1 ...

The x86 part is to indicate the arch only, not meant to be included in the 
stanza.