From mboxrd@z Thu Jan 1 00:00:00 1970 From: lho@apm.com (Loc Ho) Date: Tue, 17 Mar 2015 00:30:17 -0600 Subject: [PATCH v6 1/5] arm64: Enable EDAC on ARM64 In-Reply-To: <1426573821-1937-1-git-send-email-lho@apm.com> References: <1426573821-1937-1-git-send-email-lho@apm.com> Message-ID: <1426573821-1937-2-git-send-email-lho@apm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add an stub atomic_scrub and enable EDAC for arm64. Signed-off-by: Loc Ho --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/edac.h | 31 +++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+), 0 deletions(-) create mode 100644 arch/arm64/include/asm/edac.h diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e80cd74..d9c342a 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -20,6 +20,7 @@ config ARM64 select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select COMMON_CLK + select EDAC_SUPPORT select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS select GENERIC_ALLOCATOR diff --git a/arch/arm64/include/asm/edac.h b/arch/arm64/include/asm/edac.h new file mode 100644 index 0000000..1cedba6 --- /dev/null +++ b/arch/arm64/include/asm/edac.h @@ -0,0 +1,31 @@ +/* + * ARM64 EDAC Header File + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ +#ifndef ASM_EDAC_H +#define ASM_EDAC_H + +/* + * ECC atomic, DMA, SMP and interrupt safe scrub function. + * Implements the per arch atomic_scrub() that EDAC use for software + * ECC scrubbing. It reads memory and then writes back the original + * value, allowing the hardware to detect and correct memory errors. + */ +static inline void atomic_scrub(void *va, u32 size) +{ + /* Stub function for now until an ARM64 HW has a way to test it. */ +} + +#endif + -- 1.7.1