diff options
Diffstat (limited to 'arch/arm64/include/asm/barrier.h')
-rw-r--r-- | arch/arm64/include/asm/barrier.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h index 1c5a00598458..62217be36217 100644 --- a/arch/arm64/include/asm/barrier.h +++ b/arch/arm64/include/asm/barrier.h @@ -26,6 +26,14 @@ #define __tsb_csync() asm volatile("hint #18" : : : "memory") #define csdb() asm volatile("hint #20" : : : "memory") +/* + * Data Gathering Hint: + * This instruction prevents merging memory accesses with Normal-NC or + * Device-GRE attributes before the hint instruction with any memory accesses + * appearing after the hint instruction. + */ +#define dgh() asm volatile("hint #6" : : : "memory") + #ifdef CONFIG_ARM64_PSEUDO_NMI #define pmr_sync() \ do { \ @@ -46,6 +54,7 @@ #define dma_rmb() dmb(oshld) #define dma_wmb() dmb(oshst) +#define io_stop_wc() dgh() #define tsb_csync() \ do { \ |