Messages in this thread |  | | Date | Fri, 10 Oct 2014 12:50:34 +0100 | From | Stefano Stabellini <> | Subject | [PATCH v4 0/7] introduce GNTTABOP_cache_flush |
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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.
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 [RFC] arm/arm64: 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/dma-mapping.h | 6 + arch/arm/include/asm/xen/page.h | 4 + arch/arm/xen/Makefile | 2 +- arch/arm/xen/enlighten.c | 5 - arch/arm/xen/mm.c | 161 +++++++++++++++++++++- arch/arm/xen/mm32.c | 202 ---------------------------- arch/arm64/include/asm/dma-mapping.h | 5 + 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 +++ 12 files changed, 207 insertions(+), 256 deletions(-) delete mode 100644 arch/arm/xen/mm32.c
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