On Tue, 10 Mar 2020 14:21:23 +0100 David Hildenbrand <david@xxxxxxxxxx> wrote: > On 10.03.20 14:12, Christian Borntraeger wrote: > > When we do the initial CPU reset we must not only clear the registers > > in the internal data structures but also in kvm_run sync_regs. For > > modern userspace sync_regs is the only place that it looks at. > > > > Cc: stable@xxxxxxxxxxxxxxx > > # v? > > > Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx> > > --- > > arch/s390/kvm/kvm-s390.c | 18 +++++++++++++++++- > > 1 file changed, 17 insertions(+), 1 deletion(-) > However, I do wonder if that ioctl *originally* was designed for that - > IOW if this is rally a stable patch or just some change that makes > sense. IIRC, userspace/QEMU always did the right thing, no? There was no > documentation about the guarantees AFAIK. The documentation only refers to the PoP for what is actually reset... should it also mention the sync regs?
