1. 09 Oct, 2013 2 commits
  2. 17 Oct, 2013 1 commit
    • Stefano Stabellini's avatar
      arm/xen,arm64/xen: introduce p2m · 4a19138c
      Stefano Stabellini authored
      
      
      Introduce physical to machine and machine to physical tracking
      mechanisms based on rbtrees for arm/xen and arm64/xen.
      
      We need it because any guests on ARM are an autotranslate guests,
      therefore a physical address is potentially different from a machine
      address. When programming a device to do DMA, we need to be
      extra-careful to use machine addresses rather than physical addresses to
      program the device. Therefore we need to know the physical to machine
      mappings.
      
      For the moment we assume that dom0 starts with a 1:1 physical to machine
      mapping, in other words physical addresses correspond to machine
      addresses. However when mapping a foreign grant reference, obviously the
      1:1 model doesn't work anymore. So at the very least we need to be able
      to track grant mappings.
      
      We need locking to protect accesses to the two trees.
      Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
      
      Changes in v8:
      - move pfn_to_mfn and mfn_to_pfn to page.h as static inline functions;
      - no need to walk the tree if phys_to_mach.rb_node is NULL;
      - correctly handle multipage p2m entries;
      - substitute the spin_lock with a rwlock.
      4a19138c
  3. 15 Oct, 2013 2 commits
  4. 13 Oct, 2013 17 commits
  5. 12 Oct, 2013 10 commits
  6. 11 Oct, 2013 8 commits