[PATCH 0/5] Microwatt updates

[Paul Mackerras <paulus@ozlabs.org>]

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-poin 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.

Paul.
---
 arch/powerpc/boot/dts/microwatt.dts          | 107 +++++++++++++++++++++++----
 arch/powerpc/mm/book3s64/pgtable.c           |  10 ++-
 arch/powerpc/platforms/Kconfig.cputype       |  12 +++
 arch/powerpc/platforms/microwatt/Kconfig     |   4 +-
 arch/powerpc/platforms/microwatt/Makefile    |   1 +
 arch/powerpc/platforms/microwatt/microwatt.h |   1 +
 arch/powerpc/platforms/microwatt/setup.c     |  19 +++++
 7 files changed, 138 insertions(+), 16 deletions(-)