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2024-11-01 7e970c18f85f99acc678d90128b6e01dce1bf273

 kernel/arch/arm/kernel/entry-header.S
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@@ -203,15 +203,21 @@
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 	.macro	svc_exit, rpsr, irq = 0
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 	.if	\irq != 0
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 	@ IRQs already off
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-#ifdef CONFIG_TRACE_IRQFLAGS
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 	@ The parent context IRQs must have been enabled to get here in
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 	@ the first place, so there's no point checking the PSR I bit.
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+#ifdef CONFIG_IRQ_PIPELINE
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+	mov	r0, sp
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+	bl	kentry_exit_pipelined
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+#elif defined(CONFIG_TRACE_IRQFLAGS)
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 	bl	trace_hardirqs_on
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 #endif
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 	.else
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 	@ IRQs off again before pulling preserved data off the stack
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 	disable_irq_notrace
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-#ifdef CONFIG_TRACE_IRQFLAGS
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+#ifdef CONFIG_IRQ_PIPELINE
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+	mov	r0, sp
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+	bl	kentry_exit_pipelined
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+#elif defined(CONFIG_TRACE_IRQFLAGS)
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 	tst	\rpsr, #PSR_I_BIT
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 	bleq	trace_hardirqs_on
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 	tst	\rpsr, #PSR_I_BIT
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@@ -402,6 +408,19 @@
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 	.endm
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 /*
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+ * Branch to the exception epilogue, skipping the in-band work
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+ * if running over the out-of-band interrupt stage.
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+ */
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+	.macro ret_to_user_pipelined, tmp
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+#ifdef CONFIG_IRQ_PIPELINE
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+	ldr	\tmp, [tsk, #TI_LOCAL_FLAGS]
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+	tst	\tmp, #_TLF_OOB
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+	bne	fast_ret_to_user
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+#endif
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+	b	ret_to_user
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+	.endm
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+
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+/*
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  * These are the registers used in the syscall handler, and allow us to
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  * have in theory up to 7 arguments to a function - r0 to r6.
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  *