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This normally triggers init_local_irq_data, which reinitializes IRQ descriptors for banked interrupts (SGIs and PPIs). These descriptors are statically allocated per CPU and retain valid state across suspend/resume cycles. Re-initializing them on resume is unnecessary and may result in loss of interrupt configuration or restored state. This patch skips init_local_irq_data when system_state is set to SYS_STATE_resume to preserve banked IRQ descs state during resume. Signed-off-by: Mykola Kvach Reviewed-by: Volodymyr Babchuk --- xen/arch/arm/irq.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c index 361496a6d0..6c899347ca 100644 --- a/xen/arch/arm/irq.c +++ b/xen/arch/arm/irq.c @@ -125,6 +125,10 @@ static int cpu_callback(struct notifier_block *nfb, un= signed long action, switch ( action ) { case CPU_UP_PREPARE: + /* Skip local IRQ cleanup on resume */ + if ( system_state =3D=3D SYS_STATE_resume ) + break; + rc =3D init_local_irq_data(cpu); if ( rc ) printk(XENLOG_ERR "Unable to allocate local IRQ for CPU%u\n", --=20 2.48.1