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freeze: arm64: use normal interrupt instead of NMI

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Fixes: 55faba7 "dump: rewrite NMI handling (for resume) and fix PANIC register saving"
Fixes: ff982b8 "freeze: change freeze-thaw to normal interrupt"
Change-Id: I9445cac191f91d20357cae11b2839e4e9384ac6f
This commit is contained in:
Masamichi Takagi
2020-03-26 15:24:59 -04:00
parent 97cd379ee2
commit f1caaa9b74
3 changed files with 101 additions and 42 deletions
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58
arch/arm64/kernel/cpu.c
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@ -120,6 +120,21 @@ static struct ihk_mc_interrupt_handler cpu_stop_handler = {
};
extern long freeze_thaw(void *nmi_ctx);
static void multi_interrupt_handler(void *priv)
{
switch (multi_intr_mode) {
case 1:
case 2: /* mode == 1or2, for FREEZER intr */
dkprintf("%s: freeze mode intr catch. (multi_intr_mode=%d)\n",
__func__, multi_intr_mode);
freeze_thaw(NULL);
break;
default:
ekprintf("%s: Unknown multi-intr-mode(%d) detected.\n",
__func__, multi_intr_mode);
break;
}
}
void arch_save_panic_regs(void *irq_regs)
{
@ -162,7 +177,46 @@ void arch_clear_panic(void)
clv->arm64_cpu_local_thread.paniced = 0;
}
extern void multi_nm_interrupt_handler(void *irq_regs);
static struct ihk_mc_interrupt_handler multi_intr_handler = {
.func = multi_interrupt_handler,
.priv = NULL,
};
static void multi_nm_interrupt_handler(void *irq_regs)
{
extern int nmi_mode;
dkprintf("%s: ...\n", __func__);
switch (nmi_mode) {
case 0:
/* mode == 0, for MEMDUMP NMI */
arch_save_panic_regs(irq_regs);
ihk_mc_query_mem_areas();
/* memdump-nmi is halted McKernel, break is unnecessary. */
/* fall through */
case 3:
/* mode == 3, for SHUTDOWN-WAIT NMI */
kprintf("%s: STOP\n", __func__);
while (nmi_mode != 4)
cpu_halt();
break;
case 4:
/* mode == 4, continue NMI */
arch_clear_panic();
if (!ihk_mc_get_processor_id()) {
ihk_mc_clear_dump_page_completion();
}
kprintf("%s: RESUME, nmi_mode: %d\n", __func__, nmi_mode);
break;
default:
ekprintf("%s: Unknown nmi-mode(%d) detected.\n",
__func__, nmi_mode);
break;
}
}
static struct ihk_mc_interrupt_handler multi_nmi_handler = {
.func = multi_nm_interrupt_handler,
.priv = NULL,
@ -427,6 +481,8 @@ void ihk_mc_init_ap(void)
ihk_mc_register_interrupt_handler(INTRID_CPU_STOP, &cpu_stop_handler);
ihk_mc_register_interrupt_handler(INTRID_MULTI_NMI, &multi_nmi_handler);
ihk_mc_register_interrupt_handler(INTRID_MULTI_INTR,
&multi_intr_handler);
ihk_mc_register_interrupt_handler(
ihk_mc_get_vector(IHK_TLB_FLUSH_IRQ_VECTOR_START),
&remote_tlb_flush_handler);