diff options
| -rw-r--r-- | drivers/firmware/arm_ffa/driver.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 69ad3add3175..1724a0cbb2cf 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -99,6 +99,7 @@ struct ffa_drv_info { void *tx_buffer; bool mem_ops_native; bool bitmap_created; + bool notif_enabled; unsigned int sched_recv_irq; unsigned int cpuhp_state; struct ffa_pcpu_irq __percpu *irq_pcpu; @@ -889,6 +890,8 @@ static int ffa_memory_lend(struct ffa_mem_ops_args *args) #define FFA_SECURE_PARTITION_ID_FLAG BIT(15) +#define ffa_notifications_disabled() (!drv_info->notif_enabled) + enum notify_type { NON_SECURE_VM, SECURE_PARTITION, @@ -908,6 +911,9 @@ static int ffa_sched_recv_cb_update(u16 part_id, ffa_sched_recv_cb callback, struct ffa_dev_part_info *partition; bool cb_valid; + if (ffa_notifications_disabled()) + return -EOPNOTSUPP; + partition = xa_load(&drv_info->partition_info, part_id); write_lock(&partition->rw_lock); @@ -1001,6 +1007,9 @@ static int ffa_notify_relinquish(struct ffa_device *dev, int notify_id) int rc; enum notify_type type = ffa_notify_type_get(dev->vm_id); + if (ffa_notifications_disabled()) + return -EOPNOTSUPP; + if (notify_id >= FFA_MAX_NOTIFICATIONS) return -EINVAL; @@ -1027,6 +1036,9 @@ static int ffa_notify_request(struct ffa_device *dev, bool is_per_vcpu, u32 flags = 0; enum notify_type type = ffa_notify_type_get(dev->vm_id); + if (ffa_notifications_disabled()) + return -EOPNOTSUPP; + if (notify_id >= FFA_MAX_NOTIFICATIONS) return -EINVAL; @@ -1057,6 +1069,9 @@ static int ffa_notify_send(struct ffa_device *dev, int notify_id, { u32 flags = 0; + if (ffa_notifications_disabled()) + return -EOPNOTSUPP; + if (is_per_vcpu) flags |= (PER_VCPU_NOTIFICATION_FLAG | vcpu << 16); @@ -1388,6 +1403,7 @@ static void ffa_notifications_cleanup(void) ffa_notification_bitmap_destroy(); drv_info->bitmap_created = false; } + drv_info->notif_enabled = false; } static void ffa_notifications_setup(void) @@ -1422,6 +1438,7 @@ static void ffa_notifications_setup(void) hash_init(drv_info->notifier_hash); mutex_init(&drv_info->notify_lock); + drv_info->notif_enabled = true; return; cleanup: pr_info("Notification setup failed %d, not enabled\n", ret); |