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authorRafael J. Wysocki <rjw@sisk.pl>2011-03-23 22:16:23 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2011-03-23 22:16:23 +0100
commitfb3600cc50302c9577b76838fcac1ee78828007d (patch)
treeb5a2fe372bfe582525b165c55a3c0034bfe02665 /virt
parent134fac3f457f3dd753ecdb25e6da3e5f6629f696 (diff)
downloadlinux-stericsson-fb3600cc50302c9577b76838fcac1ee78828007d.tar.gz
KVM: Use syscore_ops instead of sysdev class and sysdev
KVM uses a sysdev class and a sysdev for executing kvm_suspend() after interrupts have been turned off on the boot CPU (during system suspend) and for executing kvm_resume() before turning on interrupts on the boot CPU (during system resume). However, since both of these functions ignore their arguments, the entire mechanism may be replaced with a struct syscore_ops object which is simpler. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c34
1 files changed, 8 insertions, 26 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 1fa0d292119a..24444527f422 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -30,7 +30,7 @@
#include <linux/debugfs.h>
#include <linux/highmem.h>
#include <linux/file.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
#include <linux/cpu.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
@@ -2447,33 +2447,26 @@ static void kvm_exit_debug(void)
debugfs_remove(kvm_debugfs_dir);
}
-static int kvm_suspend(struct sys_device *dev, pm_message_t state)
+static int kvm_suspend(void)
{
if (kvm_usage_count)
hardware_disable_nolock(NULL);
return 0;
}
-static int kvm_resume(struct sys_device *dev)
+static void kvm_resume(void)
{
if (kvm_usage_count) {
WARN_ON(raw_spin_is_locked(&kvm_lock));
hardware_enable_nolock(NULL);
}
- return 0;
}
-static struct sysdev_class kvm_sysdev_class = {
- .name = "kvm",
+static struct syscore_ops kvm_syscore_ops = {
.suspend = kvm_suspend,
.resume = kvm_resume,
};
-static struct sys_device kvm_sysdev = {
- .id = 0,
- .cls = &kvm_sysdev_class,
-};
-
struct page *bad_page;
pfn_t bad_pfn;
@@ -2557,14 +2550,6 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
goto out_free_2;
register_reboot_notifier(&kvm_reboot_notifier);
- r = sysdev_class_register(&kvm_sysdev_class);
- if (r)
- goto out_free_3;
-
- r = sysdev_register(&kvm_sysdev);
- if (r)
- goto out_free_4;
-
/* A kmem cache lets us meet the alignment requirements of fx_save. */
if (!vcpu_align)
vcpu_align = __alignof__(struct kvm_vcpu);
@@ -2572,7 +2557,7 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
0, NULL);
if (!kvm_vcpu_cache) {
r = -ENOMEM;
- goto out_free_5;
+ goto out_free_3;
}
r = kvm_async_pf_init();
@@ -2589,6 +2574,8 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
goto out_unreg;
}
+ register_syscore_ops(&kvm_syscore_ops);
+
kvm_preempt_ops.sched_in = kvm_sched_in;
kvm_preempt_ops.sched_out = kvm_sched_out;
@@ -2600,10 +2587,6 @@ out_unreg:
kvm_async_pf_deinit();
out_free:
kmem_cache_destroy(kvm_vcpu_cache);
-out_free_5:
- sysdev_unregister(&kvm_sysdev);
-out_free_4:
- sysdev_class_unregister(&kvm_sysdev_class);
out_free_3:
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
@@ -2631,8 +2614,7 @@ void kvm_exit(void)
misc_deregister(&kvm_dev);
kmem_cache_destroy(kvm_vcpu_cache);
kvm_async_pf_deinit();
- sysdev_unregister(&kvm_sysdev);
- sysdev_class_unregister(&kvm_sysdev_class);
+ unregister_syscore_ops(&kvm_syscore_ops);
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
on_each_cpu(hardware_disable_nolock, NULL, 1);