1. 20 9月, 2011 2 次提交
    • B
      powerpc/powernv: Add OPAL takeover from PowerVM · 27f44888
      Benjamin Herrenschmidt 提交于
      On machines supporting the OPAL firmware version 1, the system
      is initially booted under pHyp. We then use a special hypercall
      to verify if OPAL is available and if it is, we then trigger
      a "takeover" which disables pHyp and loads the OPAL runtime
      firmware, giving control to the kernel in hypervisor mode.
      
      This patch add the necessary code to detect that the OPAL takeover
      capability is present when running under PowerVM (aka pHyp) and
      perform said takeover to get hypervisor control of the processor.
      
      To perform the takeover, we must first use RTAS (within Open
      Firmware runtime environment) to start all processors & threads,
      in order to give control to OPAL on all of them. We then call
      the takeover hypercall on everybody, OPAL will re-enter the kernel
      main entry point passing it a flat device-tree.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      27f44888
    • B
      powerpc: Add skeleton PowerNV platform · 55190f88
      Benjamin Herrenschmidt 提交于
      This adds a skeletton for the new Power "Non Virtualized"
      platform which will be used by machines supporting running
      without an hypervisor, for example in order to run KVM.
      
      These machines will be using a new firmware called OPAL
      for which the support will be provided by later patches.
      
      The PowerNV platform is intended to be also usable under
      the BML environment used internally for early CPU bringup
      which is why the code also supports using RTAS instead of
      OPAL in various places.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      55190f88