Il giorno gio, 27/08/2020 alle 12.39 +0200, Christophe Leroy ha scritto: > Hi, > > Le 27/08/2020 à 10:28, Giuseppe Sacco a écrit : [...] > > Sorry, I made a mistake. The real problem is down, on the same > > function, when it calls low_sleep_handler(). This is where the problem > > probably is. > > Great, you spotted the problem. > > I see what it is, it is in low_sleep_handler() in > arch/powerpc/platforms/powermac/sleep.S > > All critical registers are saved on the stack. At restore, they are > restore BEFORE re-enabling MMU (because they are needed for that). But > when we have VMAP_STACK, the stack can hardly be accessed without the > MMU enabled. tophys() doesn't work for virtual stack addresses. > > Therefore, the low_sleep_handler() has to be reworked for using an area > in the linear mem instead of the stack.
I am sorry, but I don't know how to fix it. Should I open a bug for tracking this problem? Thank you, Giuseppe