73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/* freeze.c COPYRIGHT FUJITSU LIMITED 2019 */
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#include <kmsg.h>
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#include <string.h>
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#include <ihk/cpu.h>
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#include <ihk/debug.h>
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#include <cls.h>
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#include <ihk/monitor.h>
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#include <init.h>
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extern void mod_nmi_ctx(void *, void(*)());
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extern void lapic_ack();
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extern void __freeze();
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void
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freeze()
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{
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unsigned long flags;
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struct ihk_os_cpu_monitor *monitor = cpu_local_var(monitor);
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if (monitor->status_bak & IHK_OS_MONITOR_ALLOW_THAW_REQUEST) {
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return;
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}
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monitor->status_bak = monitor->status
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| IHK_OS_MONITOR_ALLOW_THAW_REQUEST;
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monitor->status = IHK_OS_MONITOR_KERNEL_FROZEN;
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flags = cpu_enable_interrupt_save();
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frozen:
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while (monitor->status == IHK_OS_MONITOR_KERNEL_FROZEN) {
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cpu_halt();
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cpu_pause();
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}
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if (monitor->status_bak != IHK_OS_MONITOR_KERNEL_THAW) {
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monitor->status = IHK_OS_MONITOR_KERNEL_FROZEN;
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goto frozen;
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}
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cpu_restore_interrupt(flags);
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monitor->status = monitor->status_bak;
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}
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long
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freeze_thaw(void *nmi_ctx)
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{
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struct ihk_os_cpu_monitor *monitor = cpu_local_var(monitor);
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if (multi_intr_mode == 1) {
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if (monitor->status != IHK_OS_MONITOR_KERNEL_FROZEN) {
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#if 1
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mod_nmi_ctx(nmi_ctx, __freeze);
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return 1;
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#else
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unsigned long flags;
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flags = cpu_disable_interrupt_save();
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monitor->status_bak = monitor->status;
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monitor->status = IHK_OS_MONITOR_KERNEL_FROZEN;
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lapic_ack();
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while (monitor->status == IHK_OS_MONITOR_KERNEL_FROZEN)
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cpu_halt();
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monitor->status = monitor->status_bak;
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cpu_restore_interrupt(flags);
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#endif
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}
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}
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else if (multi_intr_mode == 2) {
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if (monitor->status_bak & IHK_OS_MONITOR_ALLOW_THAW_REQUEST) {
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monitor->status = monitor->status_bak
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& ~IHK_OS_MONITOR_ALLOW_THAW_REQUEST;
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monitor->status_bak = IHK_OS_MONITOR_KERNEL_THAW;
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}
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}
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return 0;
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}
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