The runlatch bits with their value indicated by CTRL_RUNLATCH are set and cleared in the SPRN_CTRL registers to indicate a busy and idle cpu respectively. This is currently being done in the cpuidle path of the host. But needs to be taken care of in hotplug and kvm scenarios. This patchset is aimed at ensuring that the runlatch bits are consisten with the utilization of a CPU under all circumstances. ---
Preeti U Murthy (3): ppc/powernv: Set the runlatch bits correctly for offline cpus ppc/kvm: Set the runlatch bit of a CPU just before starting guest ppc/kvm: Clear the runlatch bit of a vcpu before napping arch/powerpc/kvm/book3s_hv_rmhandlers.S | 18 +++++++++++++++++- arch/powerpc/platforms/powernv/smp.c | 3 +++ 2 files changed, 20 insertions(+), 1 deletion(-) -- _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev