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ANDROID: gunyah: vm_mgr: Add uevents for VM state change

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Introduce CREATE_VM and DESTROY_VM notifications for the VMM.

Bug: 399219478
Change-Id: I584ea0c6d088cc93b1b42f19dc36ed177bcdb05a
Signed-off-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>
This commit is contained in:
Prakruthi Deepak Heragu
2025-02-24 14:28:44 -08:00
committed by Todd Kjos
parent 67d7d75278
commit ef92f3ef0c
1 changed files with 26 additions and 0 deletions
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drivers/virt/gunyah/vm_mgr.c
+26
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@@ -29,6 +29,9 @@
#define BOOT_CONTEXT_REG_MASK GUNYAH_VM_BOOT_CONTEXT_REG(0xff, 0xff)
#define GUNYAH_EVENT_CREATE_VM 0
#define GUNYAH_EVENT_DESTROY_VM 1
static DEFINE_XARRAY(gunyah_vm_functions);
static inline int gunyah_vm_fill_boot_context(struct gunyah_vm *ghvm)
@@ -570,6 +573,27 @@ static int gunyah_vm_rm_notification(struct notifier_block *nb,
}
}
static void gunyah_uevent_notify_change(unsigned int type, struct gunyah_vm *ghvm)
{
struct kobj_uevent_env *env;
env = kzalloc(sizeof(*env), GFP_KERNEL_ACCOUNT);
if (!env)
return;
if (type == GUNYAH_EVENT_CREATE_VM)
add_uevent_var(env, "EVENT=create");
else if (type == GUNYAH_EVENT_DESTROY_VM) {
add_uevent_var(env, "EVENT=destroy");
add_uevent_var(env, "vm_exit=%d", ghvm->exit_info.type);
}
add_uevent_var(env, "vm_id=%hu", ghvm->vmid);
env->envp[env->envp_idx++] = NULL;
kobject_uevent_env(&ghvm->parent->kobj, KOBJ_CHANGE, env->envp);
kfree(env);
}
static void gunyah_vm_stop(struct gunyah_vm *ghvm)
{
int ret;
@@ -738,6 +762,7 @@ static int gunyah_vm_start(struct gunyah_vm *ghvm)
goto err;
}
ghvm->vmid = vmid ? vmid : ret;
gunyah_uevent_notify_change(GUNYAH_EVENT_CREATE_VM, ghvm);
ret = gunyah_vm_pre_vm_configure(ghvm);
if (ret)
@@ -1064,6 +1089,7 @@ static void _gunyah_vm_put(struct kref *kref)
up_write(&ghvm->bindings_lock);
WARN_ON(!mtree_empty(&ghvm->bindings));
mtree_destroy(&ghvm->bindings);
gunyah_uevent_notify_change(GUNYAH_EVENT_DESTROY_VM, ghvm);
if (ghvm->vm_status > GUNYAH_RM_VM_STATUS_NO_STATE) {
gunyah_rm_notifier_unregister(ghvm->rm, &ghvm->nb);