From: "Gautham R. Shenoy" <e...@linux.vnet.ibm.com> Hi,
This is the third version of the patchset containing the fixes to make CPU-Hotplug working on correctly on POWER9 DD1 systems. The earlier versions can be found here: [v2] : https://lkml.org/lkml/2017/3/20/555 [v1] : https://lkml.org/lkml/2017/3/13/46 The only change in this patch series from v2 are the following optimizations suggested by Nicholas Piggin. - Dynamically allocate the thread_sibling_pacas array to contain "threads_per_core" number of slots instead of declaring the array size upfront. - Use SPRN_TIR instead of (SPRN_PIR & 0x3) to determine the thread's index within a core. Patch 4 in the series requires Nicholas Piggin's ack. Rest of the patches are unchanged from the previous version. These patches are based on v4.11-rc3. The patches have been tested with stop1 (ESL=EC=1) as the deepest-state entered into during CPU-Hotplug. Gautham R. Shenoy (4): powernv: Move CPU-Offline idle state invocation from smp.c to idle.c powernv:smp: Add busy-wait loop as fall back for CPU-Hotplug powernv:idle: Don't override default/deepest directly in kernel powernv: Recover correct PACA on wakeup from a stop on P9 DD1 arch/powerpc/include/asm/cpuidle.h | 1 + arch/powerpc/include/asm/paca.h | 5 ++ arch/powerpc/kernel/asm-offsets.c | 1 + arch/powerpc/kernel/idle_book3s.S | 48 +++++++++++++++- arch/powerpc/platforms/powernv/idle.c | 96 ++++++++++++++++++++++++++------ arch/powerpc/platforms/powernv/powernv.h | 2 - arch/powerpc/platforms/powernv/smp.c | 18 +----- 7 files changed, 136 insertions(+), 35 deletions(-) -- 1.9.4
