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 W9T9B0Fh 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This also requires special handling for > clear_user_(high)page(). Introduce cpu_icache_is_aliasing() to make > MM code query special clear_user_(high)page() easier. This will be used > by the following commit. > > Suggested-by: Mathieu Desnoyers > Signed-off-by: Zi Yan Reviewed-by: Mathieu Desnoyers > --- > arch/arc/Kconfig | 1 + > arch/arc/include/asm/cachetype.h | 8 ++++++++ > include/linux/cacheinfo.h | 6 ++++++ > 3 files changed, 15 insertions(+) > create mode 100644 arch/arc/include/asm/cachetype.h > > diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig > index 5b2488142041..e96935373796 100644 > --- a/arch/arc/Kconfig > +++ b/arch/arc/Kconfig > @@ -6,6 +6,7 @@ > config ARC > def_bool y > select ARC_TIMERS > + select ARCH_HAS_CPU_CACHE_ALIASING > select ARCH_HAS_CACHE_LINE_SIZE > select ARCH_HAS_DEBUG_VM_PGTABLE > select ARCH_HAS_DMA_PREP_COHERENT > diff --git a/arch/arc/include/asm/cachetype.h b/arch/arc/include/asm/cachetype.h > new file mode 100644 > index 000000000000..acd3b6cb4bf5 > --- /dev/null > +++ b/arch/arc/include/asm/cachetype.h > @@ -0,0 +1,8 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#ifndef __ASM_ARC_CACHETYPE_H > +#define __ASM_ARC_CACHETYPE_H > + > +#define cpu_dcache_is_aliasing() false > +#define cpu_icache_is_aliasing() true > + > +#endif > diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h > index 108060612bb8..7ad736538649 100644 > --- a/include/linux/cacheinfo.h > +++ b/include/linux/cacheinfo.h > @@ -155,8 +155,14 @@ static inline int get_cpu_cacheinfo_id(int cpu, int level) > > #ifndef CONFIG_ARCH_HAS_CPU_CACHE_ALIASING > #define cpu_dcache_is_aliasing() false > +#define cpu_icache_is_aliasing() cpu_dcache_is_aliasing() > #else > #include > + > +#ifndef cpu_icache_is_aliasing > +#define cpu_icache_is_aliasing() cpu_dcache_is_aliasing() > +#endif > + > #endif > > #endif /* _LINUX_CACHEINFO_H */ -- Mathieu Desnoyers EfficiOS Inc. https://www.efficios.com