On Mon, 19 Oct 2020 at 17:26, Marc Zyngier <m...@kernel.org> wrote: > > On 2020-10-14 12:12, Sumit Garg wrote: > > Introduce framework to turn an IPI as NMI using pseudo NMIs. In case a > > particular platform doesn't support pseudo NMIs, then request IPI as a > > regular IRQ. > > > > The main motivation for this feature is to have an IPI that can be > > leveraged to invoke NMI functions on other CPUs. And current > > prospective > > users are NMI backtrace and KGDB CPUs round-up whose support is added > > via future patches. > > > > Signed-off-by: Sumit Garg <sumit.g...@linaro.org> > > --- > > arch/arm64/include/asm/nmi.h | 16 +++++++++ > > arch/arm64/kernel/Makefile | 2 +- > > arch/arm64/kernel/ipi_nmi.c | 77 > > ++++++++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 94 insertions(+), 1 deletion(-) > > create mode 100644 arch/arm64/include/asm/nmi.h > > create mode 100644 arch/arm64/kernel/ipi_nmi.c > > [...] > > > + irq_set_status_flags(ipi, IRQ_HIDDEN); > > Another thing is this. Why are you hiding this from /proc/interrupts? > The only reason the other IPIs are hidden is that displaying them as > "normal" interrupts would be a change in userspace ABI. > > In your case, this is something new that can perfectly appear as > a standard interrupt (and I don't see how you'd display the > statistics otherwise).
Makes sense. I will remove this flag for this IPI so that it can be displayed as a standard interrupt. -Sumit > > M. > -- > Jazz is not dead. It just smells funny... _______________________________________________ Kgdb-bugreport mailing list Kgdb-bugreport@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport
