固定GMAC1 网卡名为 eth3

hc

2024-11-15 a46a1ad097419aeea7350987dd95230f50d90392

 kernel/fs/exec.c
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@@ -34,6 +34,7 @@
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 #include <linux/swap.h>
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 #include <linux/string.h>
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 #include <linux/init.h>
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+#include <linux/irq_pipeline.h>
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 #include <linux/sched/mm.h>
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 #include <linux/sched/coredump.h>
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 #include <linux/sched/signal.h>
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@@ -68,6 +69,7 @@
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 #include <linux/uaccess.h>
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 #include <asm/mmu_context.h>
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 #include <asm/tlb.h>
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+#include <asm/dovetail.h>
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 #include <trace/events/task.h>
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 #include "internal.h"
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@@ -981,6 +983,7 @@
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 	struct task_struct *tsk;
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 	struct mm_struct *old_mm, *active_mm;
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 	int ret;
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+	unsigned long flags;
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 	/* Notify parent that we're no longer interested in the old VM */
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 	tsk = current;
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@@ -1013,6 +1016,7 @@
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 	local_irq_disable();
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 	active_mm = tsk->active_mm;
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+	protect_inband_mm(flags);
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 	tsk->active_mm = mm;
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 	tsk->mm = mm;
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 	/*
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@@ -1021,10 +1025,17 @@
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 	 * lazy tlb mm refcounting when these are updated by context
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 	 * switches. Not all architectures can handle irqs off over
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 	 * activate_mm yet.
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+	 *
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+	 * irq_pipeline: activate_mm() allowing irqs off context is a
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+	 * requirement. e.g. TLB shootdown must not involve IPIs. We
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+	 * make sure protect_inband_mm() is in effect while switching
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+	 * in and activating the new mm by forcing
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+	 * CONFIG_ARCH_WANT_IRQS_OFF_ACTIVATE_MM on.
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 	 */
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 	if (!IS_ENABLED(CONFIG_ARCH_WANT_IRQS_OFF_ACTIVATE_MM))
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 		local_irq_enable();
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 	activate_mm(active_mm, mm);
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+	unprotect_inband_mm(flags);
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 	if (IS_ENABLED(CONFIG_ARCH_WANT_IRQS_OFF_ACTIVATE_MM))
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 		local_irq_enable();
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 	tsk->mm->vmacache_seqnum = 0;
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@@ -1302,6 +1313,9 @@
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 	if (retval)
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 		goto out_unlock;
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+	/* Tell Dovetail about the ongoing exec(). */
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+	arch_dovetail_exec_prepare();
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+
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 	/*
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 	 * Ensure that the uaccess routines can actually operate on userspace
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 	 * pointers: