From: Pingfan Liu <>

Since my last v4 [1], the code has undergone great changes. The paca[]
array has been reorganized and indexed by paca_ptrs[], which
dramatically decreases the memory consumption even if there are many
unpresent cpus in the middle.

However, reordering the logical cpu numbers can further decrease the
size of paca_ptrs[] in the kdump case. These two patches rotate-shifts
the cpu's sequence number in the device tree to obtain the logical cpu

v8 -> v9
  put aside [3-5/5] in v8 for the time being, which complicates the code.
  optimize out some unnecessary initialization according to Hari's

Cc: Michael Ellerman <>
Cc: Nicholas Piggin <>
Cc: Christophe Leroy <>
Cc: Mahesh Salgaonkar <>
Cc: Wen Xiong <>
Cc: Baoquan He <>
Cc: Ming Lei <>
Cc: Sourabh Jain <>
Cc: Hari Bathini <>

Pingfan Liu (2):
  powerpc/setup : Enable boot_cpu_hwid for PPC32
  powerpc/setup: Loosen the mapping between cpu logical id and its seq
    in dt

 arch/powerpc/include/asm/smp.h     |  2 +-
 arch/powerpc/kernel/prom.c         | 26 +++++----
 arch/powerpc/kernel/setup-common.c | 86 +++++++++++++++++++++++-------
 3 files changed, 83 insertions(+), 31 deletions(-)


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