1. 23 10月, 2015 1 次提交
  2. 28 5月, 2015 1 次提交
  3. 10 10月, 2013 1 次提交
    • S
      xen/arm,arm64: enable SWIOTLB_XEN · 83862ccf
      Stefano Stabellini 提交于
      Xen on arm and arm64 needs SWIOTLB_XEN: when running on Xen we need to
      program the hardware with mfns rather than pfns for dma addresses.
      Remove SWIOTLB_XEN dependency on X86 and PCI and make XEN select
      SWIOTLB_XEN on arm and arm64.
      
      At the moment always rely on swiotlb-xen, but when Xen starts supporting
      hardware IOMMUs we'll be able to avoid it conditionally on the presence
      of an IOMMU on the platform.
      
      Implement xen_create_contiguous_region on arm and arm64: for the moment
      we assume that dom0 has been mapped 1:1 (physical addresses == machine
      addresses) therefore we don't need to call XENMEM_exchange. Simply
      return the physical address as dma address.
      
      Initialize the xen-swiotlb from xen_early_init (before the native
      dma_ops are initialized), set xen_dma_ops to &xen_swiotlb_dma_ops.
      Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
      
      
      Changes in v8:
      - assume dom0 is mapped 1:1, no need to call XENMEM_exchange.
      
      Changes in v7:
      - call __set_phys_to_machine_multi from xen_create_contiguous_region and
      xen_destroy_contiguous_region to update the P2M;
      - don't call XENMEM_unpin, it has been removed;
      - call XENMEM_exchange instead of XENMEM_exchange_and_pin;
      - set nr_exchanged to 0 before calling the hypercall.
      
      Changes in v6:
      - introduce and export xen_dma_ops;
      - call xen_mm_init from as arch_initcall.
      
      Changes in v4:
      - remove redefinition of DMA_ERROR_CODE;
      - update the code to use XENMEM_exchange_and_pin and XENMEM_unpin;
      - add a note about hardware IOMMU in the commit message.
      
      Changes in v3:
      - code style changes;
      - warn on XENMEM_put_dma_buf failures.
      83862ccf
  4. 14 9月, 2012 1 次提交