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syscore: Pass context data to callbacks

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Several drivers can benefit from registering per-instance data along
with the syscore operations. To achieve this, move the modifiable fields
out of the syscore_ops structure and into a separate struct syscore that
can be registered with the framework. Add a void * driver data field for
drivers to store contextual data that will be passed to the syscore ops.

Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2025-10-29 17:33:30 +01:00
parent 3a86608788
commit a97fbc3ee3
109 changed files with 899 additions and 471 deletions
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18
virt/kvm/kvm_main.c
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@@ -5629,7 +5629,7 @@ static int kvm_offline_cpu(unsigned int cpu)
return 0;
}
static void kvm_shutdown(void)
static void kvm_shutdown(void *data)
{
/*
* Disable hardware virtualization and set kvm_rebooting to indicate
@@ -5647,7 +5647,7 @@ static void kvm_shutdown(void)
on_each_cpu(kvm_disable_virtualization_cpu, NULL, 1);
}
static int kvm_suspend(void)
static int kvm_suspend(void *data)
{
/*
* Secondary CPUs and CPU hotplug are disabled across the suspend/resume
@@ -5664,7 +5664,7 @@ static int kvm_suspend(void)
return 0;
}
static void kvm_resume(void)
static void kvm_resume(void *data)
{
lockdep_assert_not_held(&kvm_usage_lock);
lockdep_assert_irqs_disabled();
@@ -5672,12 +5672,16 @@ static void kvm_resume(void)
WARN_ON_ONCE(kvm_enable_virtualization_cpu());
}
static struct syscore_ops kvm_syscore_ops = {
static const struct syscore_ops kvm_syscore_ops = {
.suspend = kvm_suspend,
.resume = kvm_resume,
.shutdown = kvm_shutdown,
};
static struct syscore kvm_syscore = {
.ops = &kvm_syscore_ops,
};
int kvm_enable_virtualization(void)
{
int r;
@@ -5694,7 +5698,7 @@ int kvm_enable_virtualization(void)
if (r)
goto err_cpuhp;
register_syscore_ops(&kvm_syscore_ops);
register_syscore(&kvm_syscore);
/*
* Undo virtualization enabling and bail if the system is going down.
@@ -5716,7 +5720,7 @@ int kvm_enable_virtualization(void)
return 0;
err_rebooting:
unregister_syscore_ops(&kvm_syscore_ops);
unregister_syscore(&kvm_syscore);
cpuhp_remove_state(CPUHP_AP_KVM_ONLINE);
err_cpuhp:
kvm_arch_disable_virtualization();
@@ -5732,7 +5736,7 @@ void kvm_disable_virtualization(void)
if (--kvm_usage_count)
return;
unregister_syscore_ops(&kvm_syscore_ops);
unregister_syscore(&kvm_syscore);
cpuhp_remove_state(CPUHP_AP_KVM_ONLINE);
kvm_arch_disable_virtualization();
}