Re: [PATCH v2 4/6] docs/about/deprecated: Deprecate the qemu-system-arm binary

On 03/03/2023 12.16, Peter Maydell wrote: > On Thu, 2 Mar 2023 at 16:31, Thomas Huth <thuth(a)redhat.com&gt; wrote: > > > > qemu-system-aarch64 is a proper superset of qemu-system-arm, > > and the latter was mainly still required for 32-bit KVM support. > > But this 32-bit KVM arm support has been dropped in the Linux > > kernel a couple of years ago already, so we don't really need > > qemu-system-arm anymore, thus deprecated it now. > > > > Signed-off-by: Thomas Huth <thuth(a)redhat.com&gt; > > --- > > docs/about/deprecated.rst | 10 ++++++++++ > > 1 file changed, 10 insertions(+) > > > > diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst > > index a30aa8dfdf..21ce70b5c9 100644 > > --- a/docs/about/deprecated.rst > > +++ b/docs/about/deprecated.rst > > @@ -45,6 +45,16 @@ run 32-bit guests by selecting a 32-bit CPU model, including KVM support > > on x86_64 hosts. Thus users are recommended to reconfigure their systems > > to use the ``qemu-system-x86_64`` binary instead. > > > > +``qemu-system-arm`` binary (since 8.0) > > +'''''''''''''''''''''''''''''''''''''' > > + > > +``qemu-system-aarch64`` is a proper superset of ``qemu-system-arm``. > > I think this is not quite true -- at the moment if you want > "every feature we implement, 32-bit" the only way to get > that is 'qemu-system-arm -cpu max'. The '-cpu max' on > qemu-system-aarch64 is 64-bit, and we don't implement for TCG > the "-cpu max,aarch64=off" syntax that we do for KVM that would > let the user say "no 64-bit support". Ok ... so what does that mean now? ... can we continue with this patch, e.g. after rephrasing the text a little bit, or do we need to implement "-cpu max,aarch64=off" for TCG first?