Hi Tejun, On 10/11/2023 15:07, 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(-)
Any feedback regarding this? Thanks, Alex
