BMC/Intel-BMC/linux.git/arch/arm64/include/asm/xen, branch dev

xen/arm/arm64: merge xen/mm32.c into xen/mm.c

2014-12-04T12:41:53+00:00

Merge xen/mm32.c into xen/mm.c. As a consequence the code gets compiled on arm64 too. Signed-off-by: Stefano Stabellini Reviewed-by: Catalin Marinas

xen: add a dma_addr_t dev_addr argument to xen_dma_map_page

2014-12-04T12:41:51+00:00

dev_addr is the machine address of the page. The new parameter can be used by the ARM and ARM64 implementations of xen_dma_map_page to find out if the page is a local page (pfn == mfn) or a foreign page (pfn != mfn). dev_addr could be retrieved again from the physical address, using pfn_to_mfn, but it requires accessing an rbtree. Since we already have the dev_addr in our hands at the call site there is no need to get the mfn twice. Signed-off-by: Stefano Stabellini Reviewed-by: Catalin Marinas Acked-by: Konrad Rzeszutek Wilk

xen/arm64: do not call the swiotlb functions twice

2013-12-11T16:21:00+00:00

On arm64 the dma_map_ops implementation is based on the swiotlb. swiotlb-xen, used by default in dom0 on Xen, is also based on the swiotlb. Avoid calling into the default arm64 dma_map_ops functions from xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu, and xen_dma_sync_single_for_device otherwise we end up calling into the swiotlb twice. When arm64 gets a non-swiotlb based implementation of dma_map_ops, we'll probably have to reintroduce dma_map_ops calls in page-coherent.h. Signed-off-by: Stefano Stabellini CC: catalin.marinas@arm.com CC: Will.Deacon@arm.com CC: Ian.Campbell@citrix.com

xen: introduce xen_dma_map/unmap_page and xen_dma_sync_single_for_cpu/device

2013-10-25T10:39:49+00:00

Introduce xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu and xen_dma_sync_single_for_device. They have empty implementations on x86 and ia64 but they call the corresponding platform dma_ops function on arm and arm64. Signed-off-by: Stefano Stabellini Changes in v9: - xen_dma_map_page return void, avoid page_to_phys.

xen: introduce xen_alloc/free_coherent_pages

2013-10-09T17:18:14+00:00

xen_swiotlb_alloc_coherent needs to allocate a coherent buffer for cpu and devices. On native x86 is sufficient to call __get_free_pages in order to get a coherent buffer, while on ARM (and potentially ARM64) we need to call the native dma_ops->alloc implementation. Introduce xen_alloc_coherent_pages to abstract the arch specific buffer allocation. Similarly introduce xen_free_coherent_pages to free a coherent buffer: on x86 is simply a call to free_pages while on ARM and ARM64 is arm_dma_ops.free. Signed-off-by: Stefano Stabellini Changes in v7: - rename __get_dma_ops to __generic_dma_ops; - call __generic_dma_ops(hwdev)->alloc/free on arm64 too. Changes in v6: - call __get_dma_ops to get the native dma_ops pointer on arm.

arm64/xen: introduce asm/xen header files on arm64

2013-06-07T10:39:45+00:00

asm/xen/hypercall.h, asm/xen/hypervisor.h, asm/xen/interface.h and asm/xen/page.h are identical so to avoid code duplication we are just including the original arm header files here. asm/xen/events.h is slightly different, so introduce a different file here (use xchg to implement xchg_xen_ulong and pass regs->pstate to raw_irqs_disabled_flags). Also introduce asm/hypervisor.h and asm/sync_bitops.h. Signed-off-by: Stefano Stabellini Acked-by: Ian Campbell