Re: [PATCH v6 11/21] KVM: s390: pci: do initial setup for AEN interpretation

Christian Borntraeger
2022-05-05T10:16:43Z

Am 26.04.22 um 22:08 schrieb Matthew Rosato:
[...]
> +/* Caller must hold the aift lock before calling this function */

When you do a next round, maybe use lockdep_assert_help instead of this comment

> +void kvm_s390_pci_aen_exit(void)
> +{
> + unsigned long flags;
> + struct kvm_zdev **gait_kzdev;
> +
> + /*
> + * Contents of the aipb remain registered for the life of the host
> + * kernel, the information preserved in zpci_aipb and zpci_aif_sbv
> + * in case we insert the KVM module again later. Clear the AIFT
> + * information and free anything not registered with underlying
> + * firmware.
> + */
> + spin_lock_irqsave(&aift->gait_lock, flags);
> + gait_kzdev = aift->kzdev;
> + aift->gait = 0;
> + aift->sbv = 0;
> + aift->kzdev = 0;
> + spin_unlock_irqrestore(&aift->gait_lock, flags);
> +
> + kfree(gait_kzdev);
> +}
> +

Otherwise,

Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>