This series attempts to move the ARM64 numa implementation to common code so that RISC-V can leverage that as well instead of reimplementing it again. RISC-V specific bits are based on initial work done by Greentime Hu [1] but modified to reuse the common implementation to avoid duplication. [1] https://lkml.org/lkml/2020/1/10/233 This series has been tested on qemu with numa enabled for both RISC-V & ARM64. It would be great if somebody can test it on numa capable ARM64 hardware platforms. This patch series doesn't modify the maintainers list for the common code (arch_numa) as I am not sure if somebody from ARM64 community or Greg should take up the maintainership. Ganapatrao was the original author of the arm64 version. I would be happy to update that in the next revision once it is decided. # numactl --hardware available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 node 0 size: 486 MB node 0 free: 470 MB node 1 cpus: 4 5 6 7 node 1 size: 424 MB node 1 free: 408 MB node distances: node 0 1 0: 10 20 1: 20 10 # numactl -show policy: default preferred node: current physcpubind: 0 1 2 3 4 5 6 7 cpubind: 0 1 nodebind: 0 1 membind: 0 1 For RISC-V, the following qemu series is a pre-requisite to test the patches in Qemu. https://patchwork.kernel.org/project/qemu-devel/list/?series=303313 The patches are also available at https://github.com/atishp04/linux/tree/5.10_numa_unified There may be some minor conflicts with Mike's cleanup series [2] depending on the order in which these two series are being accepted. I can rebase on top his series if required. [2] https://lkml.org/lkml/2020/7/28/39 Atish Patra (5): numa: Move numa implementation to common code arm64, numa: Change the numa init function name to be generic arm64, numa: Move pcibus_to_node definition to generic numa code riscv: Separate memory init from paging init riscv: Add numa support for riscv64 platform Greentime Hu (1): riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING arch/arm64/Kconfig | 1 + arch/arm64/include/asm/numa.h | 45 +--------------- arch/arm64/kernel/pci.c | 10 ---- arch/arm64/mm/Makefile | 1 - arch/arm64/mm/init.c | 4 +- arch/riscv/Kconfig | 31 ++++++++++- arch/riscv/include/asm/mmzone.h | 13 +++++ arch/riscv/include/asm/numa.h | 8 +++ arch/riscv/include/asm/pci.h | 10 ++++ arch/riscv/include/asm/pgtable.h | 21 ++++++++ arch/riscv/kernel/setup.c | 12 ++++- arch/riscv/kernel/smpboot.c | 12 ++++- arch/riscv/mm/init.c | 10 +++- drivers/base/Kconfig | 6 +++ drivers/base/Makefile | 1 + .../mm/numa.c => drivers/base/arch_numa.c | 19 ++++++- include/asm-generic/numa.h | 51 +++++++++++++++++++ 17 files changed, 190 insertions(+), 65 deletions(-) create mode 100644 arch/riscv/include/asm/mmzone.h create mode 100644 arch/riscv/include/asm/numa.h rename arch/arm64/mm/numa.c => drivers/base/arch_numa.c (97%) create mode 100644 include/asm-generic/numa.h -- 2.24.0
