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KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init()

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kvm_arch_vcpu_ioctl_vcpu_init() doesn't acquire mp_state_lock
when setting the mp_state to KVM_MP_STATE_RUNNABLE. Fix the
code to acquire the lock.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
[maz: minor refactor]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230419021852.2981107-2-reijiw@google.com
This commit is contained in:
Reiji Watanabe 2023-04-18 19:18:51 -07:00 committed by Marc Zyngier
parent 49e5d16b6f
commit 4ff910be01
1 changed files with 5 additions and 1 deletions
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6
arch/arm64/kvm/arm.c
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@ -1241,11 +1241,15 @@ static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
/*
* Handle the "start in power-off" case.
*/
spin_lock(&vcpu->arch.mp_state_lock);
if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features))
kvm_arm_vcpu_power_off(vcpu);
__kvm_arm_vcpu_power_off(vcpu);
else
WRITE_ONCE(vcpu->arch.mp_state.mp_state, KVM_MP_STATE_RUNNABLE);
spin_unlock(&vcpu->arch.mp_state_lock);
return 0;
}