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csky: Add flush_icache_mm to defer flush icache all

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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 <guoren@linux.alibaba.com>
This commit is contained in:
Guo Ren
2020-01-31 20:33:10 +08:00
parent cc1f6563a9
commit 997153b9a7
7 changed files with 77 additions and 11 deletions
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2
arch/csky/include/asm/mmu_context.h
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@@ -43,5 +43,7 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
TLBMISS_HANDLER_SETUP_PGD(next->pgd);
write_mmu_entryhi(next->context.asid.counter);
flush_icache_deferred(next);
}
#endif /* __ASM_CSKY_MMU_CONTEXT_H */