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charset=us-ascii Content-Disposition: inline In-Reply-To: <20231110140721.114235-1-alexghiti@rivosinc.com> X-Rspamd-Queue-Id: 5EDC740005 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: ojjc63x3y8iwzqwqbxhuxgyynandnrg1 X-HE-Tag: 1702019847-438009 X-HE-Meta: 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 d9LzB9eT 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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