Messages in this thread | | | Date | Fri, 30 Jul 2021 10:39:21 +0100 | From | Catalin Marinas <> | Subject | Re: [PATCH net-next 1/4] arm64: barrier: add DGH macros to control memory accesses merging |
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On Fri, Jul 30, 2021 at 11:14:21AM +0800, Guangbin Huang wrote: > From: Xiongfeng Wang <wangxiongfeng2@huawei.com> > > DGH prohibits merging memory accesses with Normal-NC or Device-GRE > attributes before the hint instruction with any memory accesses > appearing after the hint instruction. Provide macros to expose it to the > arch code. > > Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> > Signed-off-by: Cheng Jian <cj.chengjian@huawei.com> > Signed-off-by: Yufeng Mo <moyufeng@huawei.com> > --- > arch/arm64/include/asm/assembler.h | 7 +++++++ > arch/arm64/include/asm/barrier.h | 1 + > 2 files changed, 8 insertions(+) > > diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h > index 89faca0e740d..5a3348b5e9f3 100644 > --- a/arch/arm64/include/asm/assembler.h > +++ b/arch/arm64/include/asm/assembler.h > @@ -90,6 +90,13 @@ > .endm > > /* > + * Data gathering hint > + */ > + .macro dgh > + hint #6 > + .endm
Do we need this macro? It doesn't seem to be used anywhere.
-- Catalin
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