Signed-off-by: liguang <lig.f...@cn.fujitsu.com>
---
drivers/platform/x86/cpu_physic_hotplug.c | 27 +++++++++++++++++++++++++--
1 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/cpu_physic_hotplug.c
b/drivers/platform/x86/cpu_physic_hotplug.c
index a52c042..a84c999 100644
--- a/drivers/platform/x86/cpu_physic_hotplug.c
+++ b/drivers/platform/x86/cpu_physic_hotplug.c
@@ -9,6 +9,9 @@ MODULE_AUTHOR("Li Guang");
MODULE_DESCRIPTION("CPU physically hot-plug/unplug Driver");
MODULE_LICENSE("GPL");
+#define EC_SPACE_CPU_IDX 3
+#define EC_SPACE_CPU_OFFSET 4
+
static int cpu_logic_hotplug_notify(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
@@ -36,6 +39,26 @@ static struct notifier_block cpu_logic_hotplug_notifier =
static int cpu_physic_hotplug_notify(struct notifier_block *nfb,
unsigned char *s)
{
+ u8 index = 0, val = 0;
+ bool cpu_state = false;
+ struct acpi_processor *pr;
+
+ ec_read(EC_SPACE_CPU_IDX, &index);
+ if (index == 0)
+ goto out;
+ pr = per_cpu(processors, index);
+
+ ec_read(EC_SPACE_CPU_OFFSET + index/8, &val);
+ if (val & 1 << index/8)
+ cpu_state = true;
+
+ if (pr->flags.need_hotplug_init & cpu_state)
+ cpu_up(pr->id);
+ else
+ cpu_down(pr->id);
+
+out:
+ return NOTIFY_OK;
}
static struct notifier_block cpu_physic_hotplug_notifier =
@@ -46,14 +69,14 @@ static struct notifier_block cpu_physic_hotplug_notifier =
static int __init cpu_qemu_hotplug_init(void)
{
register_hotcpu_notifier(&cpu_logic_hotplug_notifier);
- register_ec_gpe_notifier(&cpu_physic_hotplug_notifier);
+ register_ec_space_notifier(&cpu_physic_hotplug_notifier);
return 0;
}
static void __exit cpu_qemu_hotplug_exit(void)
{
unregister_hotcpu_notifier(&cpu_logic_hotplug_notifier);
- unregister_ec_gpe_notifier(&cpu_physic_hotplug_notifier);
+ unregister_ec_space_notifier(&cpu_physic_hotplug_notifier);
}
module_init(cpu_qemu_hotplug_init);
--
1.7.2.5
--
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