Re: [PATCH v2 06/19] arm64: entry: add a call_on_irq_stack helper

[PATCH v2 00/19] arm64: entry: migrate more code to C · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
[PATCH v2 01/19] arm64: remove redundant local_daif_mask() in bad_mode() · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 01/19] arm64: remove redundant local_daif_mask() in bad_mode() · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 02/19] arm64: entry: unmask IRQ+FIQ after EL0 handling · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 02/19] arm64: entry: unmask IRQ+FIQ after EL0 handling · Joey Gouly <joey.gouly@arm.com> · 2021-05-25
[PATCH v2 03/19] arm64: entry: convert SError handlers to C · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 03/19] arm64: entry: convert SError handlers to C · Joey Gouly <joey.gouly@arm.com> · 2021-05-25
[PATCH v2 04/19] arm64: entry: move arm64_preempt_schedule_irq to entry-common.c · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 04/19] arm64: entry: move arm64_preempt_schedule_irq to entry-common.c · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 05/19] arm64: entry: move preempt logic to C · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 05/19] arm64: entry: move preempt logic to C · Joey Gouly <joey.gouly@arm.com> · 2021-05-25
[PATCH v2 06/19] arm64: entry: add a call_on_irq_stack helper · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 06/19] arm64: entry: add a call_on_irq_stack helper · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
[PATCH v2 07/19] arm64: entry: convert IRQ+FIQ handlers to C · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 07/19] arm64: entry: convert IRQ+FIQ handlers to C · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
Re: [PATCH v2 07/19] arm64: entry: convert IRQ+FIQ handlers to C · Mark Rutland <mark.rutland@arm.com> · 2021-05-21
[PATCH v2 09/19] arm64: entry: organise entry vectors consistently · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 09/19] arm64: entry: organise entry vectors consistently · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 08/19] arm64: entry: organise entry handlers consistently · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 08/19] arm64: entry: organise entry handlers consistently · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 10/19] arm64: entry: consolidate EL1 exception returns · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 10/19] arm64: entry: consolidate EL1 exception returns · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 12/19] arm64: entry: improve bad_mode() · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 12/19] arm64: entry: improve bad_mode() · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
Re: [PATCH v2 12/19] arm64: entry: improve bad_mode() · Mark Rutland <mark.rutland@arm.com> · 2021-05-21
[PATCH v2 11/19] arm64: entry: move bad_mode() to entry-common.c · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 11/19] arm64: entry: move bad_mode() to entry-common.c · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 13/19] arm64: entry: template the entry asm functions · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 13/19] arm64: entry: template the entry asm functions · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 14/19] arm64: entry: handle all vectors with C · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 14/19] arm64: entry: handle all vectors with C · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
Re: [PATCH v2 14/19] arm64: entry: handle all vectors with C · Mark Rutland <mark.rutland@arm.com> · 2021-05-21
[PATCH v2 15/19] arm64: entry: split bad stack entry · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 15/19] arm64: entry: split bad stack entry · Joey Gouly <joey.gouly@arm.com> · 2021-05-25
[PATCH v2 16/19] arm64: entry: split SDEI entry · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 16/19] arm64: entry: split SDEI entry · Joey Gouly <joey.gouly@arm.com> · 2021-05-25
[PATCH v2 17/19] arm64: entry: make NMI entry/exit functions static · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
Re: [PATCH v2 17/19] arm64: entry: make NMI entry/exit functions static · Joey Gouly <joey.gouly@arm.com> · 2021-05-21
[PATCH v2 18/19] arm64: entry: don't instrument entry code with KCOV · Mark Rutland <mark.rutland@arm.com> · 2021-05-19
[PATCH v2 19/19] arm64: idle: don't instrument idle code with KCOV · Mark Rutland <mark.rutland@arm.com> · 2021-05-19

From: Mark Rutland <mark.rutland@arm.com>
Date: 2021-05-19 14:48:31

On Wed, May 19, 2021 at 01:38:49PM +0100, Mark Rutland wrote:

+/*
+ * void call_on_irq_stack(struct pt_regs *regs,
+ * 		          void (*func)(struct pt_regs *));
+ *
+ * Calls func(regs) using this CPU's irq stack and shadow irq stack.
+ */
+SYM_FUNC_START(call_on_irq_stack)
+#ifdef CONFIG_SHADOW_CALL_STACK
+	stp	scs_sp, xzr, [sp, #-16]!
+	adr_this_cpu scs_sp, irq_shadow_call_stack, x17

The Kbuild test robot spotted this was leading to a link failure, since
`irq_shadow_call_stack` does not exist. I've updated this to:

	ldr_this_cpu scs_sp, irq_shadow_call_stack_ptr, x17

... which matches how irq_stack_entry acquires the shadow stack pointer
today (and passes a boot test).

Thanks,
Mark.

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