On Fri, 18 Dec 2020 at 20:12, Ard Biesheuvel <a...@kernel.org> wrote: > > On Fri, 18 Dec 2020 at 15:01, Ard Biesheuvel <a...@kernel.org> wrote: > > > > On Fri, 18 Dec 2020 at 15:00, Russell King - ARM Linux admin > > <li...@armlinux.org.uk> wrote: > > > > > > On Fri, Dec 18, 2020 at 01:48:09PM +0000, Guillaume Tucker wrote: > > > > Please see the bisection report below about a boot failure on > > > > ox820-cloudengines-pogoplug-series-3. There was also a bisection > > > > yesterday with next-20201216 which landed on the same commit, on > > > > the same platform and also with oxnas_v6_defconfig. I'm not > > > > aware of any other platform on kernelci.org showing the same > > > > regression. > > > > > > Ah, I bet I know what's happening. > > > > > > We test for the presence of VFP by issuing an instruction to read > > > FPSID. If VFP is not present, this will raise an undefined instruction > > > exception, and we expect to head into the vfp_testing_entry code. > > > > > > I bet Pogoplug, being an ARM11 MPCore platform, either raises an > > > exception here. > > > > > > We probably need to also rework the code in vfp_init() as well to > > > register a temporary hook when reading the FPSID. > > > > > > > Thanks for diagnosing that - I wasn't quite sure what was going on. > > > > I will look into this later today. > > Working again with my fix applied:
https://kernelci.org/test/plan/id/5fdcebf1a6350e2bd1c94cd3/ I'll drop it into the patch system tomorrow (unless there is a pressing need to do it earlier)
