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331a1b3a83
Enable arch_trigger_cpumask_backtrace() support on arm64. This enables
things much like they are enabled on arm32 (including some of the
funky logic around NR_IPI, nr_ipi, and MAX_IPI) but with the
difference that, unlike arm32, we'll try to enable the backtrace to
use pseudo-NMI.
NOTE: this patch is a squash of the little bit of code adding the
ability to mark an IPI to try to use pseudo-NMI plus the little bit of
code to hook things up for kgdb. This approach was decided upon in the
discussion of v9 [1].
This patch depends on commit 8d539b84f1 ("nmi_backtrace: allow
excluding an arbitrary CPU") since that commit changed the prototype
of arch_trigger_cpumask_backtrace(), which this patch implements.
[1] https://lore.kernel.org/r/ZORY51mF4alI41G1@FVFF77S0Q05N
Co-developed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Co-developed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Misono Tomohiro <misono.tomohiro@fujitsu.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230906090246.v13.4.Ie6c132b96ebbbcddbf6954b9469ed40a6960343c@changeid
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
25 lines
543 B
C
25 lines
543 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_IRQ_H
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#define __ASM_IRQ_H
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#ifndef __ASSEMBLER__
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#include <asm-generic/irq.h>
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void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu);
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#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
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struct pt_regs;
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int set_handle_irq(void (*handle_irq)(struct pt_regs *));
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#define set_handle_irq set_handle_irq
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int set_handle_fiq(void (*handle_fiq)(struct pt_regs *));
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static inline int nr_legacy_irqs(void)
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{
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return 0;
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}
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#endif /* !__ASSEMBLER__ */
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#endif
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