kernel/linux.git/arch/xtensa/include/asm/cacheflush.h, branch v6.12.80

xtensa: remove redundant flush_dcache_page and ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE macros

2024-04-29T04:18:18+00:00

xtensa's flush_dcache_page() can be a no-op sometimes. There is a generic implementation for this case in include/asm-generic/ cacheflush.h. #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE static inline void flush_dcache_page(struct page *page) { } #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 #endif So remove the superfluous flush_dcache_page() definition, which also helps silence potential build warnings complaining the page variable passed to flush_dcache_page() is not used. In file included from crypto/scompress.c:12: include/crypto/scatterwalk.h: In function 'scatterwalk_pagedone': include/crypto/scatterwalk.h:76:30: warning: variable 'page' set but not used [-Wunused-but-set-variable] 76 | struct page *page; | ^~~~ crypto/scompress.c: In function 'scomp_acomp_comp_decomp': >> crypto/scompress.c:174:38: warning: unused variable 'dst_page' [-Wunused-variable] 174 | struct page *dst_page = sg_page(req->dst); | The issue was originally reported on LoongArch by kernel test robot (Huacai fixed it on LoongArch), then reported by Guenter and me on xtensa. This patch also removes lots of redundant macros which have been defined by asm-generic/cacheflush.h. Cc: Huacai Chen Cc: Herbert Xu Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202403091614.NeUw5zcv-lkp@intel.com/ Reported-by: Barry Song Closes: https://lore.kernel.org/all/CAGsJ_4yDk1+axbte7FKQEwD7X2oxUCFrEc9M5YOS1BobfDFXPA@mail.gmail.com/ Reported-by: Guenter Roeck Closes: https://lore.kernel.org/all/aaa8b7d7-5abe-47bf-93f6-407942436472@roeck-us.net/ Fixes: 77292bb8ca69 ("crypto: scomp - remove memcpy if sg_nents is 1 and pages are lowmem") Signed-off-by: Barry Song Message-Id: <20240319010920.125192-1-21cnbao@gmail.com> Signed-off-by: Max Filippov

mm: Introduce flush_cache_vmap_early()

2023-12-14T08:23:17+00:00

The pcpu setup when using the page allocator sets up a new vmalloc mapping very early in the boot process, so early that it cannot use the flush_cache_vmap() function which may depend on structures not yet initialized (for example in riscv, we currently send an IPI to flush other cpus TLB). But on some architectures, we must call flush_cache_vmap(): for example, in riscv, some uarchs can cache invalid TLB entries so we need to flush the new established mapping to avoid taking an exception. So fix this by introducing a new function flush_cache_vmap_early() which is called right after setting the new page table entry and before accessing this new mapping. This new function implements a local flush tlb on riscv and is no-op for other architectures (same as today). Signed-off-by: Alexandre Ghiti Acked-by: Geert Uytterhoeven Signed-off-by: Dennis Zhou

mm: rationalise flush_icache_pages() and flush_icache_page()

2023-08-24T23:20:25+00:00

Move the default (no-op) implementation of flush_icache_pages() to from . Remove the flush_icache_page() wrapper from each architecture into . Link: https://lkml.kernel.org/r/20230802151406.3735276-32-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton

xtensa: implement the new page table range API

2023-08-24T23:20:24+00:00

Add PFN_PTE_SHIFT, update_mmu_cache_range(), flush_dcache_folio() and flush_icache_pages(). Link: https://lkml.kernel.org/r/20230802151406.3735276-30-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Mike Rapoport (IBM) Cc: Max Filippov Signed-off-by: Andrew Morton

Add linux/cacheflush.h

2021-11-17T15:36:15+00:00

Many architectures do not include asm-generic/cacheflush.h, so turn the includes on their head and add linux/cacheflush.h which includes asm/cacheflush.h. Move the flush_dcache_folio() declaration from asm-generic/cacheflush.h to linux/cacheflush.h and change linux/highmem.h to include linux/cacheflush.h instead of asm/cacheflush.h so that all necessary places will see flush_dcache_folio(). More functions should have their default implementations moved in the future, but those are for follow-on patches. This fixes csky, sparc and sparc64 which were missed in the commit which added flush_dcache_folio(). Fixes: 08b0b0059bf1 ("mm: Add flush_dcache_folio()") Suggested-by: Christoph Hellwig Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Geert Uytterhoeven

mm: Add flush_dcache_folio()

2021-10-18T11:49:36+00:00

This is a default implementation which calls flush_dcache_page() on each page in the folio. If architectures can do better, they should implement their own version of it. Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Vlastimil Babka

xtensa: implement flush_icache_user_range

2020-06-08T18:05:58+00:00

The Xtensa implementation of flush_icache_range seems to be able to cope with user addresses. Just define flush_icache_user_range to flush_icache_range. [jcmvbkbc@gmail.com: fix flush_icache_user_range in noMMU configs] Link: http://lkml.kernel.org/r/20200525221556.4270-1-jcmvbkbc@gmail.com Signed-off-by: Christoph Hellwig Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Cc: Chris Zankel Cc: Max Filippov Link: http://lkml.kernel.org/r/20200515143646.3857579-23-hch@lst.de Signed-off-by: Linus Torvalds

docs: Fix some broken references

2018-06-15T21:10:01+00:00

As we move stuff around, some doc references are broken. Fix some of them via this script: ./scripts/documentation-file-ref-check --fix Manually checked if the produced result is valid, removing a few false-positives. Acked-by: Takashi Iwai Acked-by: Masami Hiramatsu Acked-by: Stephen Boyd Acked-by: Charles Keepax Acked-by: Mathieu Poirier Reviewed-by: Coly Li Signed-off-by: Mauro Carvalho Chehab Acked-by: Jonathan Corbet

xtensa: support DMA to high memory

2015-11-08T22:25:37+00:00

- don't bugcheck if high memory page is passed to xtensa_map_page; - turn empty dcache flush macros into functions so that they could be passed as function parameters; - use kmap_atomic to map high memory pages for cache invalidation/ flushing performed by xtensa_sync_single_for_{cpu,device}. Signed-off-by: Max Filippov

Revert "xtensa: cache inquiry and unaligned cache handling functions"

2015-11-03T15:37:45+00:00

Drop unaligned dcache management functions as they are no longer used. This reverts commit bd974240c9a7 ("xtensa: cache inquiry and unaligned cache handling functions"). Signed-off-by: Max Filippov