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| author | Reiji Watanabe <reijiw@google.com> | 2023-04-19 05:18:52 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-04-20 11:06:20 +0300 |
| commit | a189884bdc9238aeba941c50f02e25eb584fafed (patch) | |
| tree | 4e5c64a8c0724b7584928a45c34241dcab0d2c0f /arch/arm64/kvm | |
| parent | 4ff910be01c0ca28c2ea8b354dd47a3a17524489 (diff) | |
| download | linux-a189884bdc9238aeba941c50f02e25eb584fafed.tar.xz | |
KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state
All accessors of kvm_vcpu_arch::mp_state should be {READ,WRITE}_ONCE(),
since readers of the mp_state don't acquire the mp_state_lock.
Nonetheless, kvm_psci_vcpu_on() updates the mp_state without using
WRITE_ONCE(). So, fix the code to update the mp_state using WRITE_ONCE.
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230419021852.2981107-3-reijiw@google.com
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/psci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/psci.c b/arch/arm64/kvm/psci.c index 5767e6baa61a..d046e82e3723 100644 --- a/arch/arm64/kvm/psci.c +++ b/arch/arm64/kvm/psci.c @@ -110,7 +110,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) */ smp_wmb(); - vcpu->arch.mp_state.mp_state = KVM_MP_STATE_RUNNABLE; + WRITE_ONCE(vcpu->arch.mp_state.mp_state, KVM_MP_STATE_RUNNABLE); kvm_vcpu_wake_up(vcpu); out_unlock: |