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From: Christoffer Dall <christoffer.dall@arm.com>
To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org
Subject: [PATCH 0/5] KVM: arm/arm64: Fix VCPU power management problems
Date: Fri, 25 Jan 2019 10:46:51 +0100	[thread overview]
Message-ID: <20190125094656.5026-1-christoffer.dall@arm.com> (raw)

This series fixes a number of issues:

 - When powering on and resetting VCPUs, we can be preempted in the
   middle which can lead to guest system register corruption.

 - We were missing support for PSCI ON_PENDING when multiple VCPUs try
   to turn on a target VCPU at the same time.

 - Powering off a VCPU could race with powering on the same VCPU.

 - We unnecesarily panic'ed if we found a non-initialized guest system
   register.

The main approach to fixing all these problems is by using VCPU
requests.

See the individual patches for more details.

Christoffer Dall (3):
  KVM: arm/arm64: Reset the VCPU without preemption and vcpu state
    loaded
  KVM: arm/arm64: Require VCPU threads to turn them self off
  KVM: arm/arm64: Implement PSCI ON_PENDING when turning on VCPUs

Marc Zyngier (2):
  arm/arm64: KVM: Allow a VCPU to fully reset itself
  arm/arm64: KVM: Don't panic on failure to properly reset system
    registers

 arch/arm/include/asm/kvm_host.h   | 22 ++++++++++-
 arch/arm/kvm/coproc.c             |  4 +-
 arch/arm/kvm/reset.c              | 24 ++++++++++++
 arch/arm64/include/asm/kvm_host.h | 23 ++++++++++-
 arch/arm64/kvm/reset.c            | 50 +++++++++++++++++++++++-
 arch/arm64/kvm/sys_regs.c         |  4 +-
 virt/kvm/arm/arm.c                | 40 ++++++++++++++-----
 virt/kvm/arm/psci.c               | 64 +++++++++++++++----------------
 8 files changed, 177 insertions(+), 54 deletions(-)

-- 
2.18.0

WARNING: multiple messages have this Message-ID (diff)
From: Christoffer Dall <christoffer.dall@arm.com>
To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org
Cc: Christoffer Dall <christoffer.dall@arm.com>, kvm@vger.kernel.org
Subject: [PATCH 0/5] KVM: arm/arm64: Fix VCPU power management problems
Date: Fri, 25 Jan 2019 10:46:51 +0100	[thread overview]
Message-ID: <20190125094656.5026-1-christoffer.dall@arm.com> (raw)

This series fixes a number of issues:

 - When powering on and resetting VCPUs, we can be preempted in the
   middle which can lead to guest system register corruption.

 - We were missing support for PSCI ON_PENDING when multiple VCPUs try
   to turn on a target VCPU at the same time.

 - Powering off a VCPU could race with powering on the same VCPU.

 - We unnecesarily panic'ed if we found a non-initialized guest system
   register.

The main approach to fixing all these problems is by using VCPU
requests.

See the individual patches for more details.

Christoffer Dall (3):
  KVM: arm/arm64: Reset the VCPU without preemption and vcpu state
    loaded
  KVM: arm/arm64: Require VCPU threads to turn them self off
  KVM: arm/arm64: Implement PSCI ON_PENDING when turning on VCPUs

Marc Zyngier (2):
  arm/arm64: KVM: Allow a VCPU to fully reset itself
  arm/arm64: KVM: Don't panic on failure to properly reset system
    registers

 arch/arm/include/asm/kvm_host.h   | 22 ++++++++++-
 arch/arm/kvm/coproc.c             |  4 +-
 arch/arm/kvm/reset.c              | 24 ++++++++++++
 arch/arm64/include/asm/kvm_host.h | 23 ++++++++++-
 arch/arm64/kvm/reset.c            | 50 +++++++++++++++++++++++-
 arch/arm64/kvm/sys_regs.c         |  4 +-
 virt/kvm/arm/arm.c                | 40 ++++++++++++++-----
 virt/kvm/arm/psci.c               | 64 +++++++++++++++----------------
 8 files changed, 177 insertions(+), 54 deletions(-)

-- 
2.18.0


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             reply	other threads:[~2019-01-25  9:46 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-25  9:46 Christoffer Dall [this message]
2019-01-25  9:46 ` [PATCH 0/5] KVM: arm/arm64: Fix VCPU power management problems Christoffer Dall
2019-01-25  9:46 ` [PATCH 1/5] KVM: arm/arm64: Reset the VCPU without preemption and vcpu state loaded Christoffer Dall
2019-01-25  9:46   ` Christoffer Dall
2019-01-29 15:48   ` Andrew Jones
2019-01-29 15:48     ` Andrew Jones
2019-01-29 16:05     ` Marc Zyngier
2019-01-29 16:05       ` Marc Zyngier
2019-01-30  9:22       ` Christoffer Dall
2019-01-30  9:22         ` Christoffer Dall
2019-02-04 15:15   ` Andrew Jones
2019-02-04 15:15     ` Andrew Jones
2019-02-20 19:14   ` Dave Martin
2019-02-20 19:14     ` Dave Martin
2019-02-20 19:41     ` Marc Zyngier
2019-02-20 19:41       ` Marc Zyngier
2019-02-26 13:53       ` Dave Martin
2019-02-26 13:53         ` Dave Martin
2019-02-27 12:05         ` Dave Martin
2019-02-27 12:05           ` Dave Martin
2019-02-26 12:34     ` Christoffer Dall
2019-02-26 12:34       ` Christoffer Dall
2019-02-26 14:00       ` Dave Martin
2019-02-26 14:00         ` Dave Martin
2019-01-25  9:46 ` [PATCH 2/5] arm/arm64: KVM: Allow a VCPU to fully reset itself Christoffer Dall
2019-01-25  9:46   ` Christoffer Dall
2019-01-29 16:03   ` Andrew Jones
2019-01-29 16:03     ` Andrew Jones
2019-01-30  9:34     ` Christoffer Dall
2019-01-30  9:34       ` Christoffer Dall
2019-01-30 15:27       ` Andrew Jones
2019-01-30 15:27         ` Andrew Jones
2019-01-31  7:43         ` Christoffer Dall
2019-01-31  7:43           ` Christoffer Dall
2019-01-31 10:12           ` Andrew Jones
2019-01-31 10:12             ` Andrew Jones
2019-01-31 11:51             ` Christoffer Dall
2019-01-31 11:51               ` Christoffer Dall
2019-01-31 12:57               ` Andrew Jones
2019-01-31 12:57                 ` Andrew Jones
2019-01-31 14:13                 ` Christoffer Dall
2019-01-31 14:13                   ` Christoffer Dall
2019-01-31 14:52                 ` Marc Zyngier
2019-01-31 14:52                   ` Marc Zyngier
2019-01-31 17:06                   ` Andrew Jones
2019-01-31 17:06                     ` Andrew Jones
2019-02-01  7:58                     ` Christoffer Dall
2019-02-01  7:58                       ` Christoffer Dall
2019-02-04 15:08                       ` Andrew Jones
2019-02-04 15:08                         ` Andrew Jones
2019-02-04 15:15   ` Andrew Jones
2019-02-04 15:15     ` Andrew Jones
2019-01-25  9:46 ` [PATCH 3/5] KVM: arm/arm64: Require VCPU threads to turn them self off Christoffer Dall
2019-01-25  9:46   ` Christoffer Dall
2019-01-29 16:16   ` Andrew Jones
2019-01-29 16:16     ` Andrew Jones
2019-01-30  9:49     ` Christoffer Dall
2019-01-30  9:49       ` Christoffer Dall
2019-01-30 15:31       ` Andrew Jones
2019-01-30 15:31         ` Andrew Jones
2019-01-25  9:46 ` [PATCH 4/5] KVM: arm/arm64: Implement PSCI ON_PENDING when turning on VCPUs Christoffer Dall
2019-01-25  9:46   ` Christoffer Dall
2019-01-29 16:27   ` Andrew Jones
2019-01-29 16:27     ` Andrew Jones
2019-01-25  9:46 ` [PATCH 5/5] arm/arm64: KVM: Don't panic on failure to properly reset system registers Christoffer Dall
2019-01-25  9:46   ` Christoffer Dall
2019-01-29 16:33   ` Andrew Jones
2019-01-29 16:33     ` Andrew Jones
2019-01-30  9:51     ` Christoffer Dall
2019-01-30  9:51       ` Christoffer Dall
2019-01-30 10:56     ` Marc Zyngier
2019-01-30 10:56       ` Marc Zyngier
2019-01-30 15:36       ` Andrew Jones
2019-01-30 15:36         ` Andrew Jones
2019-01-31 10:15         ` Marc Zyngier
2019-01-31 10:15           ` Marc Zyngier

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