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/arch/arm/include/asm/mmu_context.h | 40 +++++++++++++++++++++++++++++++---------
1 files changed, 31 insertions(+), 9 deletions(-)
diff --git a/kernel/arch/arm/include/asm/mmu_context.h b/kernel/arch/arm/include/asm/mmu_context.h
index f99ed52..32cded3 100644
--- a/kernel/arch/arm/include/asm/mmu_context.h
+++ b/kernel/arch/arm/include/asm/mmu_context.h
@@ -14,6 +14,7 @@
#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/preempt.h>
+#include <linux/irq_pipeline.h>
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
@@ -72,6 +73,7 @@
static inline void finish_arch_post_lock_switch(void)
{
struct mm_struct *mm = current->mm;
+ unsigned long flags;
if (mm && mm->context.switch_pending) {
/*
@@ -83,7 +85,9 @@
preempt_disable();
if (mm->context.switch_pending) {
mm->context.switch_pending = 0;
+ protect_inband_mm(flags);
cpu_switch_mm(mm->pgd, mm);
+ unprotect_inband_mm(flags);
}
preempt_enable_no_resched();
}
@@ -102,7 +106,7 @@
#endif /* CONFIG_CPU_HAS_ASID */
#define destroy_context(mm) do { } while(0)
-#define activate_mm(prev,next) switch_mm(prev, next, NULL)
+#define activate_mm(prev,next) __switch_mm(prev, next, NULL)
/*
* This is called when "tsk" is about to enter lazy TLB mode.
@@ -118,15 +122,9 @@
{
}
-/*
- * This is the actual mm switch as far as the scheduler
- * is concerned. No registers are touched. We avoid
- * calling the CPU specific function when the mm hasn't
- * actually changed.
- */
static inline void
-switch_mm(struct mm_struct *prev, struct mm_struct *next,
- struct task_struct *tsk)
+__switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
{
#ifdef CONFIG_MMU
unsigned int cpu = smp_processor_id();
@@ -149,6 +147,30 @@
#endif
}
+/*
+ * This is the actual mm switch as far as the scheduler
+ * is concerned. No registers are touched. We avoid
+ * calling the CPU specific function when the mm hasn't
+ * actually changed.
+ */
+static inline void
+switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ unsigned long flags;
+
+ protect_inband_mm(flags);
+ __switch_mm(prev, next, tsk);
+ unprotect_inband_mm(flags);
+}
+
#define deactivate_mm(tsk,mm) do { } while (0)
+static inline void
+switch_oob_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ __switch_mm(prev, next, tsk);
+}
+
#endif
--
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