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| author | Reiji Watanabe <reijiw@google.com> | 2023-04-19 05:18:51 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-04-20 11:06:02 +0300 |
| commit | 4ff910be01c0ca28c2ea8b354dd47a3a17524489 (patch) | |
| tree | 7dde91e8bf0df5d8fb42328057389edc145fda6c | |
| parent | 49e5d16b6fc003407a33a9961b4bcbb970bd1c76 (diff) | |
| download | linux-4ff910be01c0ca28c2ea8b354dd47a3a17524489.tar.xz | |
KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init()
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
| -rw-r--r-- | arch/arm64/kvm/arm.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index fd8d355aca15..ad3655a7d122 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -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; } |