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arm64: Provide dcache_clean_poc_nosync helper

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dcache_clean_poc_nosync does not wait for the data cache clean to
complete. Later, we wait for completion of all scatter-gather entries
together.

Cc: Leon Romanovsky <leon@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Tangquan Zheng <zhengtangquan@oppo.com>
Tested-by: Xueyuan Chen <xueyuan.chen21@gmail.com>
Signed-off-by: Barry Song <baohua@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260228221239.59903-1-21cnbao@gmail.com
This commit is contained in:
Barry Song 2026-03-01 06:12:39 +08:00 committed by Marek Szyprowski
parent 2c92eff008
commit 1c3a7f9e6b
2 changed files with 16 additions and 0 deletions
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1
arch/arm64/include/asm/cacheflush.h
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@ -74,6 +74,7 @@ extern void icache_inval_pou(unsigned long start, unsigned long end);
extern void dcache_clean_inval_poc(unsigned long start, unsigned long end);
extern void dcache_inval_poc(unsigned long start, unsigned long end);
extern void dcache_clean_poc(unsigned long start, unsigned long end);
extern void dcache_clean_poc_nosync(unsigned long start, unsigned long end);
extern void dcache_clean_pop(unsigned long start, unsigned long end);
extern void dcache_clean_pou(unsigned long start, unsigned long end);
extern long caches_clean_inval_user_pou(unsigned long start, unsigned long end);

15
arch/arm64/mm/cache.S
View File

@ -178,6 +178,21 @@ SYM_FUNC_START(__pi_dcache_clean_poc)
SYM_FUNC_END(__pi_dcache_clean_poc)
SYM_FUNC_ALIAS(dcache_clean_poc, __pi_dcache_clean_poc)
/*
* dcache_clean_poc_nosync(start, end)
*
* Issue the instructions of D-cache lines for the interval [start, end).
* not necessarily cleaned to the PoC till an explicit dsb sy afterward.
*
* - start - virtual start address of region
* - end - virtual end address of region
*/
SYM_FUNC_START(__pi_dcache_clean_poc_nosync)
dcache_by_line_op_nosync cvac, x0, x1, x2, x3
ret
SYM_FUNC_END(__pi_dcache_clean_poc_nosync)
SYM_FUNC_ALIAS(dcache_clean_poc_nosync, __pi_dcache_clean_poc_nosync)
/*
* dcache_clean_pop(start, end)
*