From 2f529f9b558ca1c1bd74be7437a84e4711743404 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 01 Nov 2024 02:11:33 +0000
Subject: [PATCH] add xenomai
---
kernel/include/linux/interrupt.h | 29 ++++++++++++++++++++++++++++-
1 files changed, 28 insertions(+), 1 deletions(-)
diff --git a/kernel/include/linux/interrupt.h b/kernel/include/linux/interrupt.h
index 386ddf4..c89728f 100644
--- a/kernel/include/linux/interrupt.h
+++ b/kernel/include/linux/interrupt.h
@@ -61,6 +61,12 @@
* interrupt handler after suspending interrupts. For system
* wakeup devices users need to implement wakeup detection in
* their interrupt handlers.
+ * IRQF_OOB - Interrupt is attached to an out-of-band handler living
+ * on the heading stage of the interrupt pipeline
+ * (CONFIG_IRQ_PIPELINE). It may be delivered to the
+ * handler any time interrupts are enabled in the CPU,
+ * regardless of the (virtualized) interrupt state
+ * maintained by local_irq_save/disable().
*/
#define IRQF_SHARED 0x00000080
#define IRQF_PROBE_SHARED 0x00000100
@@ -74,6 +80,7 @@
#define IRQF_NO_THREAD 0x00010000
#define IRQF_EARLY_RESUME 0x00020000
#define IRQF_COND_SUSPEND 0x00040000
+#define IRQF_OOB 0x00080000
#define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD)
@@ -514,9 +521,29 @@
* to ensure that after a local_irq_disable(), interrupts have
* really been disabled in hardware. Such architectures need to
* implement the following hook.
+ *
+ * Those cases also apply when interrupt pipelining is in effect,
+ * since we are virtualizing the interrupt disable state here too.
*/
#ifndef hard_irq_disable
-#define hard_irq_disable() do { } while(0)
+#define hard_irq_disable() hard_cond_local_irq_disable()
+#endif
+
+/*
+ * Unlike other virtualized interrupt disabling schemes may assume, we
+ * can't expect local_irq_restore() to turn hard interrupts on when
+ * pipelining. hard_irq_enable() is introduced to be paired with
+ * hard_irq_disable(), for unconditionally turning them on. The only
+ * sane sequence mixing virtual and real disable state manipulation
+ * is:
+ *
+ * 1. local_irq_save/disable
+ * 2. hard_irq_disable
+ * 3. hard_irq_enable
+ * 4. local_irq_restore/enable
+ */
+#ifndef hard_irq_enable
+#define hard_irq_enable() hard_cond_local_irq_enable()
#endif
/* PLEASE, avoid to allocate new softirqs, if you need not _really_ high
--
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