linux-kernel - [PATCH 0/3] ppc:Set runlatch bits correctly for offline threads and vcpus

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Date:	Fri, 11 Apr 2014 15:41:25 +0530
From:	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
To:	linuxppc-dev@...abs.org
Cc:	benh@...nel.crashing.org, paulus@...ba.org,
	linux-kernel@...r.kernel.org, srivatsa.bhat@...ux.vnet.ibm.com
Subject: [PATCH 0/3] ppc:Set runlatch bits correctly for offline threads and
 vcpus

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(-)

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