linux-kernel - [PATCH v3 0/4] KVM: arm/arm64: guest synchronous halt/resume

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Message-Id: <1443217277-13173-1-git-send-email-eric.auger@linaro.org>
Date:	Fri, 25 Sep 2015 23:41:13 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	eric.auger@...com, eric.auger@...aro.org,
	christoffer.dall@...aro.org, marc.zyngier@....com,
	drjones@...hat.com, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, patches@...aro.org
Subject: [PATCH v3 0/4] KVM: arm/arm64: guest synchronous halt/resume

This series introduces the capability to synchronously exit the guest
and prevent it from being re-entered. This modality will be used by
IRQ forwarding series when changing the state of the IRQ.

Former pause flag used when starting the vcpu in KVM_ARM_VCPU_POWER_OFF
state, in PSCI calls and in KVM_SET_MP_STATE ioctl is renamed into
power_off. A new pause flag is introduced. Both now are checked in
kvm_arch_vcpu_runnable and in the VCPU_RUN critical section, before
entering the vcpu.

Best Regards

Eric

History:
v2 -> v3:
- unified the comment associated to the pause flag
- correct commit message of "KVM: arm/arm64: check power_off in
  critical section before VCPU run"
- add Christoffer R-b on whole series

v1 -> v2:
- check pause, power_off and in kvm_arch_vcpu_runnable
- check power_off in vcpu_run critcal section before guest entry
- correct compil issue in first patch reported by Andrew
- rename vcpu_pause into vcpu_sleep

RFC -> PATCH v1:
- originally part of [RFC 00/17] ARM IRQ forward control based on IRQ
  bypass manager (https://lkml.org/lkml/2015/7/2/268) and isolated in
  this series.
- added __maybe_unused following Marc's advice


Eric Auger (4):
  KVM: arm/arm64: rename pause into power_off
  KVM: arm/arm64: check power_off in kvm_arch_vcpu_runnable
  KVM: arm/arm64: check power_off in critical section before VCPU run
  KVM: arm/arm64: implement kvm_arm_[halt,resume]_guest

 arch/arm/include/asm/kvm_host.h   |  5 +++-
 arch/arm/kvm/arm.c                | 53 ++++++++++++++++++++++++++++++---------
 arch/arm/kvm/psci.c               | 10 ++++----
 arch/arm64/include/asm/kvm_host.h |  5 +++-
 4 files changed, 54 insertions(+), 19 deletions(-)

-- 
1.9.1

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