From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/arch/x86/kernel/time.c | 58 ++++++++++++++++++++++++++++++++++++++++++----------------
1 files changed, 42 insertions(+), 16 deletions(-)
diff --git a/kernel/arch/x86/kernel/time.c b/kernel/arch/x86/kernel/time.c
index 0680a2e..e42faa7 100644
--- a/kernel/arch/x86/kernel/time.c
+++ b/kernel/arch/x86/kernel/time.c
@@ -10,6 +10,7 @@
*
*/
+#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
@@ -32,8 +33,7 @@
#ifdef CONFIG_FRAME_POINTER
return *(unsigned long *)(regs->bp + sizeof(long));
#else
- unsigned long *sp =
- (unsigned long *)kernel_stack_pointer(regs);
+ unsigned long *sp = (unsigned long *)regs->sp;
/*
* Return address is either directly at stack pointer
* or above a saved flags. Eflags has bits 22-31 zero,
@@ -58,39 +58,50 @@
return IRQ_HANDLED;
}
-static struct irqaction irq0 = {
- .handler = timer_interrupt,
- .flags = IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
- .name = "timer"
-};
-
static void __init setup_default_timer_irq(void)
{
+ unsigned long flags = IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER;
+
/*
- * Unconditionally register the legacy timer; even without legacy
- * PIC/PIT we need this for the HPET0 in legacy replacement mode.
+ * Unconditionally register the legacy timer interrupt; even
+ * without legacy PIC/PIT we need this for the HPET0 in legacy
+ * replacement mode.
*/
- if (setup_irq(0, &irq0))
+ if (request_irq(0, timer_interrupt, flags, "timer", NULL))
pr_info("Failed to register legacy timer interrupt\n");
}
/* Default timer init function */
void __init hpet_time_init(void)
{
- if (!hpet_enable())
- setup_pit_timer();
+ if (!hpet_enable()) {
+ if (!pit_timer_init())
+ return;
+ }
+
setup_default_timer_irq();
}
static __init void x86_late_time_init(void)
{
- x86_init.timers.timer_init();
/*
- * After PIT/HPET timers init, select and setup
- * the final interrupt mode for delivering IRQs.
+ * Before PIT/HPET init, select the interrupt mode. This is required
+ * to make the decision whether PIT should be initialized correct.
+ */
+ x86_init.irqs.intr_mode_select();
+
+ /* Setup the legacy timers */
+ x86_init.timers.timer_init();
+
+ /*
+ * After PIT/HPET timers init, set up the final interrupt mode for
+ * delivering IRQs.
*/
x86_init.irqs.intr_mode_init();
tsc_init();
+
+ if (static_cpu_has(X86_FEATURE_WAITPKG))
+ use_tpause_delay();
}
/*
@@ -101,3 +112,18 @@
{
late_time_init = x86_late_time_init;
}
+
+/*
+ * Sanity check the vdso related archdata content.
+ */
+void clocksource_arch_init(struct clocksource *cs)
+{
+ if (cs->vdso_clock_mode == VDSO_CLOCKMODE_NONE)
+ return;
+
+ if (cs->mask != CLOCKSOURCE_MASK(64)) {
+ pr_warn("clocksource %s registered with invalid mask %016llx for VDSO. Disabling VDSO support.\n",
+ cs->name, cs->mask);
+ cs->vdso_clock_mode = VDSO_CLOCKMODE_NONE;
+ }
+}
--
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