Hi Will, On Thu, 2015-12-03 at 09:32 +0000, Will Deacon wrote: > On Wed, Dec 02, 2015 at 02:57:30PM -0800, Geoff Levand wrote: > > On Mon, 2015-11-30 at 10:40 +0000, Marc Zyngier wrote: > > > > > All that can be solved in C, and mostly at compile time. Using an > > > assembler trampoline is complicating things for no good reason: > > > > I added this into my kexec-v12.1 branch. After some more testing I'll > > post a v13 to the list. > > You may well need some notrace annotations if you want to run C code > here. Can you give it a spin with things like ftrace and kprobes? I tested ftrace with and without the notrace annotation on cpu_soft_restart() and could do kexec re-boots either way. When cpu_soft_restart() is called we've only done setup_mm_for_reboot(), so I would think C code should still be OK. -Geoff
