From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752563AbcHHRuG (ORCPT ); Mon, 8 Aug 2016 13:50:06 -0400 Received: from mail-qt0-f181.google.com ([209.85.216.181]:34389 "EHLO mail-qt0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752432AbcHHRuC (ORCPT ); Mon, 8 Aug 2016 13:50:02 -0400 From: Laura Abbott To: Sumit Semwal , John Stultz , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Riley Andrews Cc: Laura Abbott , Daniel Vetter , linaro-mm-sig@lists.linaro.org, devel@driverdev.osuosl.org, Russell King , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , Eun Taik Lee , Rohit kumar , Liviu Dudau , Jon Medhurst , Mitchel Humpherys , Jeremy Gebben , Bryan Huntsman , Greg Kroah-Hartman , Android Kernel Team Subject: [RFCv2][PATCH 3/5] arm64: Implement ARCH_HAS_FORCE_CACHE Date: Mon, 8 Aug 2016 10:49:35 -0700 Message-Id: <1470678577-14010-4-git-send-email-labbott@redhat.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1470678577-14010-1-git-send-email-labbott@redhat.com> References: <1470678577-14010-1-git-send-email-labbott@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org arm64 may need to guarantee the caches are synced. Implement versions of the kernel_force_cache API based on the DMA APIs. Signed-off-by: Laura Abbott --- arch/arm64/include/asm/cacheflush.h | 5 +++++ arch/arm64/mm/flush.c | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index c64268d..9980dd8 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -149,4 +149,9 @@ int set_memory_rw(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); +#define ARCH_HAS_FORCE_CACHE 1 + +void kernel_force_cache_clean(struct page *page, size_t size); +void kernel_force_cache_invalidate(struct page *page, size_t size); + #endif diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index 43a76b0..0af78ab 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -94,3 +95,13 @@ EXPORT_SYMBOL(flush_dcache_page); * Additional functions defined in assembly. */ EXPORT_SYMBOL(flush_icache_range); + +void kernel_force_cache_clean(struct page *page, size_t size) +{ + __dma_map_area(page_address(page), size, DMA_BIDIRECTIONAL); +} + +void kernel_force_cache_invalidate(struct page *page, size_t size) +{ + __dma_unmap_area(page_address(page), size, DMA_BIDIRECTIONAL); +} -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: labbott@redhat.com (Laura Abbott) Date: Mon, 8 Aug 2016 10:49:35 -0700 Subject: [RFCv2][PATCH 3/5] arm64: Implement ARCH_HAS_FORCE_CACHE In-Reply-To: <1470678577-14010-1-git-send-email-labbott@redhat.com> References: <1470678577-14010-1-git-send-email-labbott@redhat.com> Message-ID: <1470678577-14010-4-git-send-email-labbott@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org arm64 may need to guarantee the caches are synced. Implement versions of the kernel_force_cache API based on the DMA APIs. Signed-off-by: Laura Abbott --- arch/arm64/include/asm/cacheflush.h | 5 +++++ arch/arm64/mm/flush.c | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index c64268d..9980dd8 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -149,4 +149,9 @@ int set_memory_rw(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); +#define ARCH_HAS_FORCE_CACHE 1 + +void kernel_force_cache_clean(struct page *page, size_t size); +void kernel_force_cache_invalidate(struct page *page, size_t size); + #endif diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index 43a76b0..0af78ab 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -94,3 +95,13 @@ EXPORT_SYMBOL(flush_dcache_page); * Additional functions defined in assembly. */ EXPORT_SYMBOL(flush_icache_range); + +void kernel_force_cache_clean(struct page *page, size_t size) +{ + __dma_map_area(page_address(page), size, DMA_BIDIRECTIONAL); +} + +void kernel_force_cache_invalidate(struct page *page, size_t size) +{ + __dma_unmap_area(page_address(page), size, DMA_BIDIRECTIONAL); +} -- 2.7.4