kernel/linux.git/include/asm-generic/numa.h, branch v6.12.80

arch_numa: switch over to numa_memblks

2024-09-04T04:15:32+00:00

Until now arch_numa was directly translating firmware NUMA information to memblock. Using numa_memblks as an intermediate step has a few advantages: * alignment with more battle tested x86 implementation * availability of NUMA emulation * maintaining node information for not yet populated memory Adjust a few places in numa_memblks to compile with 32-bit phys_addr_t and replace current functionality related to numa_add_memblk() and __node_distance() in arch_numa with the implementation based on numa_memblks and add functions required by numa_emulation. [rppt@kernel.org: fix section mismatch] Link: https://lkml.kernel.org/r/ZrO6cExVz1He_yPn@kernel.org [rppt@kernel.org: PFN_PHYS() translation is unnecessary here] Link: https://lkml.kernel.org/r/Zs2T5wkSYO9MGcab@kernel.org Link: https://lkml.kernel.org/r/20240807064110.1003856-25-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) Tested-by: Zi Yan # for x86_64 and arm64 Reviewed-by: Jonathan Cameron Tested-by: Jonathan Cameron [arm64 + CXL via QEMU] Acked-by: Dan Williams Acked-by: David Hildenbrand Cc: Alexander Gordeev Cc: Andreas Larsson Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christophe Leroy Cc: Dave Hansen Cc: Davidlohr Bueso Cc: David S. Miller Cc: Greg Kroah-Hartman Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiaxun Yang Cc: John Paul Adrian Glaubitz Cc: Jonathan Corbet Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Rafael J. Wysocki Cc: Rob Herring (Arm) Cc: Samuel Holland Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton

arm64: irq: set the correct node for VMAP stack

2023-12-05T14:26:50+00:00

In current code, init_irq_stacks() will call cpu_to_node(). The cpu_to_node() depends on percpu "numa_node" which is initialized in: arch_call_rest_init() --> rest_init() -- kernel_init() --> kernel_init_freeable() --> smp_prepare_cpus() But init_irq_stacks() is called in init_IRQ() which is before arch_call_rest_init(). So in init_irq_stacks(), the cpu_to_node() does not work, it always return 0. In NUMA, it makes the node 1 cpu accesses the IRQ stack which is in the node 0. This patch fixes it by: 1.) export the early_cpu_to_node(), and use it in the init_irq_stacks(). 2.) change init_irq_stacks() to __init function. Reviewed-by: Catalin Marinas Signed-off-by: Huang Shijie Link: https://lore.kernel.org/r/20231124031513.81548-1-shijie@os.amperecomputing.com Signed-off-by: Will Deacon

numa: Move numa implementation to common code

2021-01-14T23:08:55+00:00

ARM64 numa implementation is generic enough that RISC-V can reuse that implementation with very minor cosmetic changes. This will help both ARM64 and RISC-V in terms of maintanace and feature improvement Move the numa implementation code to common directory so that both ISAs can reuse this. This doesn't introduce any function changes for ARM64. Signed-off-by: Atish Patra Acked-by: Jonathan Cameron Tested-by: Jonathan Cameron Acked-by: Catalin Marinas Signed-off-by: Palmer Dabbelt