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freeze: restore state with thaw request

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Change-Id: I7d6efd2c47020bedb716b6bd72d8a72b874c3cb2
This commit is contained in:
TOIDA,Suguru
2019-09-18 10:03:04 +09:00
committed by Masamichi Takagi
parent 04a528ab27
commit dec133c1dd
2 changed files with 12 additions and 4 deletions
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2
ihk

Submodule ihk updated: 02ef2693af...d5dc1632cc

14
kernel/freeze.c
View File

@@ -17,13 +17,19 @@ freeze()
unsigned long flags; unsigned long flags;
struct ihk_os_cpu_monitor *monitor = cpu_local_var(monitor); struct ihk_os_cpu_monitor *monitor = cpu_local_var(monitor);
monitor->status_bak = monitor->status; monitor->status_bak = monitor->status
| IHK_OS_MONITOR_ALLOW_THAW_REQUEST;
monitor->status = IHK_OS_MONITOR_KERNEL_FROZEN; monitor->status = IHK_OS_MONITOR_KERNEL_FROZEN;
flags = cpu_enable_interrupt_save(); flags = cpu_enable_interrupt_save();
frozen:
while (monitor->status == IHK_OS_MONITOR_KERNEL_FROZEN) { while (monitor->status == IHK_OS_MONITOR_KERNEL_FROZEN) {
cpu_halt(); cpu_halt();
cpu_pause(); cpu_pause();
} }
if (monitor->status_bak != IHK_OS_MONITOR_KERNEL_THAW) {
monitor->status = IHK_OS_MONITOR_KERNEL_FROZEN;
goto frozen;
}
cpu_restore_interrupt(flags); cpu_restore_interrupt(flags);
monitor->status = monitor->status_bak; monitor->status = monitor->status_bak;
} }
@@ -53,8 +59,10 @@ freeze_thaw(void *nmi_ctx)
} }
} }
else if (multi_intr_mode == 2) { else if (multi_intr_mode == 2) {
if (monitor->status == IHK_OS_MONITOR_KERNEL_FROZEN) { if (monitor->status_bak & IHK_OS_MONITOR_ALLOW_THAW_REQUEST) {
monitor->status = IHK_OS_MONITOR_KERNEL_THAW; monitor->status = monitor->status_bak
& ~IHK_OS_MONITOR_ALLOW_THAW_REQUEST;
monitor->status_bak = IHK_OS_MONITOR_KERNEL_THAW;
} }
} }
return 0; return 0;