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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1b5ba35078
Arm TC2 fails cpu hotplug stress test.
This issue was tracked down to a missing copy of the new affinity
cpumask for the vexpress-spc interrupt into struct
irq_common_data.affinity when the interrupt is migrated in
migrate_one_irq().
Fix it by replacing the arm specific hotplug cpu migration with the
generic irq code.
This is the counterpart implementation to commit 217d453d47 ("arm64:
fix a migrating irq bug when hotplug cpu").
Tested with cpu hotplug stress test on Arm TC2 (multi_v7_defconfig plus
CONFIG_ARM_BIG_LITTLE_CPUFREQ=y and CONFIG_ARM_VEXPRESS_SPC_CPUFREQ=y).
The vexpress-spc interrupt (irq=22) on this board is affine to CPU0.
Its affinity cpumask now changes correctly e.g. from 0 to 1-4 when
CPU0 is hotplugged out.
Suggested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
48 lines
859 B
C
48 lines
859 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_ARM_IRQ_H
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#define __ASM_ARM_IRQ_H
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#define NR_IRQS_LEGACY 16
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#ifndef CONFIG_SPARSE_IRQ
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#include <mach/irqs.h>
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#else
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#define NR_IRQS NR_IRQS_LEGACY
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#endif
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#ifndef irq_canonicalize
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#define irq_canonicalize(i) (i)
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#endif
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/*
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* Use this value to indicate lack of interrupt
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* capability
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*/
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#ifndef NO_IRQ
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#define NO_IRQ ((unsigned int)(-1))
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#endif
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#ifndef __ASSEMBLY__
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struct irqaction;
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struct pt_regs;
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extern void asm_do_IRQ(unsigned int, struct pt_regs *);
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void handle_IRQ(unsigned int, struct pt_regs *);
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void init_IRQ(void);
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#ifdef CONFIG_SMP
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extern void arch_trigger_cpumask_backtrace(const cpumask_t *mask,
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bool exclude_self);
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#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
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#endif
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static inline int nr_legacy_irqs(void)
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{
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return NR_IRQS_LEGACY;
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}
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#endif
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#endif
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