This patch series updates the kernel support for the Microwatt soft-core and its implementation on FPGA systems, particularly the Digilent Arty A7-100 FPGA development board.
Microwatt now supports almost all of the features of the SFFS (Scalar Fixed-point and Floating-point Subset) compliancy subset of Power ISA version 3.1C, including prefixed instructions and the fixed-point hash (ROP mitigation) instructions. It is also now SMP-capable, and a dual-core system will fit on the Arty A7-100 board. Microwatt does not have broadcast TLB invalidations in SMP systems; the kernel already has code to deal with this. One of the patches in this series provides a config option to allow platforms to select unconditionally the behaviour where cross-CPU TLB invalidations are handled using inter-processor interrupts. Tested on an Arty A7-100 FPGA board with 2 CPUs. Compile-tested for pseries and powernv. Paul. --- v2: Address review comments arch/powerpc/boot/dts/microwatt.dts | 107 +++++++++++++++++++++++---- arch/powerpc/mm/book3s64/pgtable.c | 4 +- arch/powerpc/platforms/Kconfig.cputype | 13 ++++ arch/powerpc/platforms/microwatt/Kconfig | 3 +- arch/powerpc/platforms/microwatt/Makefile | 1 + arch/powerpc/platforms/microwatt/microwatt.h | 1 + arch/powerpc/platforms/microwatt/setup.c | 18 +++++ arch/powerpc/platforms/microwatt/smp.c | 80 ++++++++++++++++++++ arch/powerpc/platforms/powernv/Kconfig | 1 + arch/powerpc/platforms/pseries/Kconfig | 1 + 10 files changed, 213 insertions(+), 16 deletions(-)
