On Mon Jun 3, 2024 at 7:30 PM AEST, Thomas Huth wrote: > On 04/05/2024 14.28, Nicholas Piggin wrote: > > The exception stack setup does not work correctly for SMP, because > > it is the boot processor that calls cpu_set() which sets SPRG2 to > > the exception stack, not the target CPU itself. So secondaries > > never got their SPRG2 set to a valid exception stack. > > So secondary CPUs currently must not run into any exceptions? Yes, at the moment. It was broken anyway. Patch 16 creates a proper environment for secondaries, including taking interrupts. Thanks, Nick > > > Remove the SMP code and just set an exception stack for the boot > > processor. Make the stack 64kB while we're here, to match the > > size of the regular stack. > > > > Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> > > --- > > lib/powerpc/setup.c | 16 ++++++++-------- > > 1 file changed, 8 insertions(+), 8 deletions(-) > > Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
