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Date: Sat, 25 Oct 2014 14:56:15 +0100 From: Stefano Stabellini <stefano.stabellini@...citrix.com> To: <xen-devel@...ts.xensource.com> CC: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Ian Campbell <Ian.Campbell@...rix.com>, David Vrabel <david.vrabel@...rix.com>, <linux-kernel@...r.kernel.org>, Stefano Stabellini <Stefano.Stabellini@...citrix.com>, <linux-arm-kernel@...ts.infradead.org> Subject: [PATCH v6 0/6] introduce GNTTABOP_cache_flush Hi all, this patch series introduces support for GNTTABOP_cache_flush to perform cache maintenance operation on foreign pages and reverts the current code based on XENFEAT_grant_map_identity. It also provides a very slow fallback by bouncing on the swiotlb buffer, in case the hypercall is not available. v6 introduces is_dma_coherent as a utility function under arch/arm/xen based on of_dma_is_coherent. Changes in v6: - rename xen_is_dma_coherent to is_dma_coherent; - use of_dma_is_coherent to detect the dma coherency of a device; - remove arch/arm64/include/asm/xen/page-coherent.h, include ../../arm/include/asm/xen/page-coherent.h instead; - fix indentation. Changes in v5: - introduce xen_is_dma_coherent as a xen specific function; - call xen_is_dma_coherent instead of is_dma_coherent; - introduce xen_is_dma_coherent to arch/arm64/include/asm/xen/page-coherent.h; - do not remove arch/arm64/include/asm/xen/page-coherent.h, add the missing dma_ops calls from it; - fix indentation; - rename hypercall_flush to hypercall_cflush; - remove spurious change. Changes in v4: - remove outer_*_range call; - introduce is_dma_coherent; - use is_dma_coherent in arch/arm/xen/mm32.c; - merge xen/mm32.c into xen/mm.c; - xen/arm/arm64: introduce xen_arch_need_swiotlb; - avoid bouncing dma map operations that involve foreign grants and non-coherent devices if GNTTABOP_cache_flush is provided by Xen. Changes in v3: - fix the cache maintenance op call to match what Linux does natively; - update the hypercall interface to match Xen. Changes in v2: - remove the definition of XENFEAT_grant_map_identity; - update the hypercall interface to match Xen; - call the interface on a single page at a time. Stefano Stabellini (7): xen/arm: remove handling of XENFEAT_grant_map_identity xen/arm: remove outer_*_range call xen/arm: introduce is_dma_coherent xen/arm: use is_dma_coherent xen/arm/arm64: merge xen/mm32.c into xen/mm.c xen/arm/arm64: introduce xen_arch_need_swiotlb xen/arm: introduce GNTTABOP_cache_flush arch/arm/include/asm/xen/page.h | 4 + arch/arm/xen/Makefile | 2 +- arch/arm/xen/enlighten.c | 5 - arch/arm/xen/mm.c | 164 ++++++++++++++++++++++ arch/arm/xen/mm32.c | 202 ---------------------------- arch/arm64/include/asm/xen/page-coherent.h | 44 +----- arch/x86/include/asm/xen/page.h | 7 + drivers/xen/swiotlb-xen.c | 5 +- include/xen/interface/features.h | 3 - include/xen/interface/grant_table.h | 19 +++ 10 files changed, 200 insertions(+), 255 deletions(-) delete mode 100644 arch/arm/xen/mm32.c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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