[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v5 11/13] xen: introduce xen_alloc/free_coherent_pages
On Thu, Aug 29, 2013 at 07:32:32PM +0100, Stefano Stabellini wrote: > xen_swiotlb_alloc_coherent needs to allocate a coherent buffer for cpu > and devices. On native x86 and ARMv8 is sufficient to call > __get_free_pages in order to get a coherent buffer, while on ARM we need > to call arm_dma_ops.alloc. Don't bet on this for ARMv8. It's not mandated for the architecture, so at some point some SoC will require non-cacheable buffers for coherency. -- Catalin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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