On Tue, Apr 14, 2020 at 01:09:35PM +0100, Peter Maydell wrote: > The Linux kernel has dropped support for allowing 32-bit Arm systems > to host KVM guests (kernel commit 541ad0150ca4aa663a2, which just > landed upstream in the 5.7 merge window). Mark QEMU's support for > this configuration as deprecated, so that we can delete that support > code in 5.2. > > Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> > --- > I was reading the 5.7 merge window writeup on LWN this weekend > and saw that the dropping of 32-bit support had gone in; just > enough time to squeeze our deprecation warning into 5.0 so we > can drop the code in 5.2 rather than 6.0... > > docs/system/deprecated.rst | 8 ++++++++ > 1 file changed, 8 insertions(+)
The docs are sufficient to start the deprecation process, but we might consider also having a warning from configure, or a message on stderr at runtime to make it more visible to users. > > diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst > index c633fe2beff..3142fac3865 100644 > --- a/docs/system/deprecated.rst > +++ b/docs/system/deprecated.rst > @@ -336,6 +336,14 @@ The ``compat`` property used to set backwards > compatibility modes for > the processor has been deprecated. The ``max-cpu-compat`` property of > the ``pseries`` machine type should be used instead. > > +KVM guest support on 32-bit Arm hosts (since 5.0) > +''''''''''''''''''''''''''''''''''''''''''''''''' > + > +The Linux kernel has dropped support for allowing 32-bit Arm systems > +to host KVM guests as of the 5.7 kernel. Accordingly, QEMU is deprecating > +its support for this configuration and will remove it in a future version. > +Running 32-bit guests on a 64-bit Arm host remains supported. > + Reviewed-by: Daniel P. Berrangé <berra...@redhat.com> Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
