1. 22 Dec, 2009 3 commits
    • Alex Chiang's avatar
      ACPI: processor: unify arch_acpi_processor_init_pdc · 407cd87c
      Alex Chiang authored
      
      
      The x86 and ia64 implementations of arch_acpi_processor_init_pdc()
      are almost exactly the same. The only difference is in what bits
      they set in obj_list buffer.
      
      Combine the boilerplate memory management code, and leave the
      arch-specific bit twiddling in separate implementations.
      
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      407cd87c
    • Alex Chiang's avatar
      ACPI: processor: introduce arch_has_acpi_pdc · 1d9cb470
      Alex Chiang authored
      
      
      arch dependent helper function that tells us if we should attempt to
      evaluate _PDC on this machine or not.
      
      The x86 implementation assumes that the CPUs in the machine must be
      homogeneous, and that you cannot mix CPUs of different vendors.
      
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      1d9cb470
    • Alex Chiang's avatar
      ACPI: processor: call _PDC early · 78f16996
      Alex Chiang authored
      We discovered that at least one machine (HP Envy), methods in the DSDT
      attempt to call external methods defined in a dynamically loaded SSDT.
      
      Unfortunately, the DSDT methods we are trying to call are part of the
      EC initialization, which happens very early, and the the dynamic SSDT
      is only loaded when a processor _PDC method runs much later.
      
      This results in namespace lookup errors for the (as of yet) undefined
      methods.
      
      Since Windows doesn't have any issues with this machine, we take it
      as a hint that they must be evaluating _PDC much earlier than we are.
      
      Thus, the proper thing for Linux to do should be to match the Windows
      implementation more closely.
      
      Provide a mechanism to call _PDC before we enable the EC. Doing so loads
      the dynamic tables, and allows the EC to be enabled correctly.
      
      The ACPI processor driver will still evaluate _PDC in its .add() method
      to cover the hotplug case.
      
      Resolves: http://bugzilla.kernel.org/show_bug.cgi?id=14824
      
      
      
      Cc: ming.m.lin@intel.com
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      78f16996
  2. 18 Dec, 2009 9 commits
  3. 17 Dec, 2009 28 commits