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| author | Christoffer Dall | 2014-10-16 16:14:43 +0200 |
|---|---|---|
| committer | Christoffer Dall | 2014-12-13 14:15:25 +0100 |
| commit | 3ad8b3de526a76fbe9466b366059e4958957b88f (patch) | |
| tree | 8fc888631918c186df6ed6cca144560f3ee3afe8 | |
| parent | arm/arm64: KVM: Don't clear the VCPU_POWER_OFF flag (diff) | |
| download | kernel-qcow2-linux-3ad8b3de526a76fbe9466b366059e4958957b88f.tar.gz kernel-qcow2-linux-3ad8b3de526a76fbe9466b366059e4958957b88f.tar.xz kernel-qcow2-linux-3ad8b3de526a76fbe9466b366059e4958957b88f.zip | |
arm/arm64: KVM: Correct KVM_ARM_VCPU_INIT power off option
The implementation of KVM_ARM_VCPU_INIT is currently not doing what
userspace expects, namely making sure that a vcpu which may have been
turned off using PSCI is returned to its initial state, which would be
powered on if userspace does not set the KVM_ARM_VCPU_POWER_OFF flag.
Implement the expected functionality and clarify the ABI.
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 3 | ||||
| -rw-r--r-- | arch/arm/kvm/arm.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 7610eaa4d491..bb82a906e51e 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2455,7 +2455,8 @@ should be created before this ioctl is invoked. Possible features: - KVM_ARM_VCPU_POWER_OFF: Starts the CPU in a power-off state. - Depends on KVM_CAP_ARM_PSCI. + Depends on KVM_CAP_ARM_PSCI. If not set, the CPU will be powered on + and execute guest code when KVM_RUN is called. - KVM_ARM_VCPU_EL1_32BIT: Starts the CPU in a 32bit mode. Depends on KVM_CAP_ARM_EL1_32BIT (arm64 only). - KVM_ARM_VCPU_PSCI_0_2: Emulate PSCI v0.2 for the CPU. diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index b160beadc956..edc196412abe 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -663,6 +663,8 @@ static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, */ if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) vcpu->arch.pause = true; + else + vcpu->arch.pause = false; return 0; } |