kernel/linux.git/arch/csky/mm/syscache.c, branch v6.6.131

csky: syscache: Fixup duplicate cache flush

2021-07-04T09:39:54+00:00

The current csky logic of sys_cacheflush is wrong, it'll cause icache flush call dcache flush again. Now fixup it with a conditional "break & fallthrough". Fixes: 997153b9a75c ("csky: Add flush_icache_mm to defer flush icache all") Fixes: 0679d29d3e23 ("csky: fix syscache.c fallthrough warning") Acked-by: Randy Dunlap Co-Developed-by: Randy Dunlap Signed-off-by: Guo Ren Cc: Arnd Bergmann

csky: fix syscache.c fallthrough warning

2021-04-28T15:02:10+00:00

This case of the switch statement falls through to the following case. This appears to be on purpose, so declare it as OK. ../arch/csky/mm/syscache.c: In function '__do_sys_cacheflush': ../arch/csky/mm/syscache.c:17:3: warning: this statement may fall through [-Wimplicit-fallthrough=] 17 | flush_icache_mm_range(current->mm, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 18 | (unsigned long)addr, | ~~~~~~~~~~~~~~~~~~~~ 19 | (unsigned long)addr + bytes); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../arch/csky/mm/syscache.c:20:2: note: here 20 | case DCACHE: | ^~~~ Fixes: 997153b9a75c ("csky: Add flush_icache_mm to defer flush icache all") Signed-off-by: Randy Dunlap Signed-off-by: Guo Ren Cc: linux-csky@vger.kernel.org Cc: Arnd Bergmann

csky: Add flush_icache_mm to defer flush icache all

2020-02-21T07:43:24+00:00

Some CPUs don't support icache.va instruction to maintain the whole smp cores' icache. Using icache.all + IPI casue a lot on performace and using defer mechanism could reduce the number of calling icache _flush_all functions. Signed-off-by: Guo Ren

csky: Cache and TLB routines

2018-10-25T15:36:19+00:00

This patch adds cache and tlb sync codes for abiv1 & abiv2. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann