Hello, On Fri, Nov 10, 2023 at 03:07:19PM +0100, Alexandre Ghiti wrote: > While working with pcpu variables, I noticed that riscv did not support > first chunk allocation in the vmalloc area which may be needed as a fallback > in case of a sparse NUMA configuration. > > patch 1 starts by introducing a new function flush_cache_vmap_early() which > is needed since a new vmalloc mapping is established and directly accessed: > on riscv, this would likely fail in case of a reordered access or if the > uarch caches invalid entries in TLB. > > patch 2 simply enables the page percpu first chunk allocator in riscv. > > Alexandre Ghiti (2): > mm: Introduce flush_cache_vmap_early() and its riscv implementation > riscv: Enable pcpu page first chunk allocator > > arch/riscv/Kconfig | 2 ++ > arch/riscv/include/asm/cacheflush.h | 3 ++- > arch/riscv/include/asm/tlbflush.h | 2 ++ > arch/riscv/mm/kasan_init.c | 8 ++++++++ > arch/riscv/mm/tlbflush.c | 5 +++++ > include/asm-generic/cacheflush.h | 6 ++++++ > mm/percpu.c | 8 +------- > 7 files changed, 26 insertions(+), 8 deletions(-) > > -- > 2.39.2 > I've applied this to percpu#for-6.8. Thanks, Dennis
