[xen master] arm/gic: Use static irqaction

[patchbot@xxxxxxx]

commit eec94999bf38c205f9e1b62ad05e2c8ddd2c89e5
Author:     Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>
AuthorDate: Wed Nov 12 10:51:47 2025 +0000
Commit:     Julien Grall <julien@xxxxxxx>
CommitDate: Sun Nov 16 12:22:30 2025 +0000

    arm/gic: Use static irqaction
    
    When stopping a core cpu_gic_callback is called in non-alloc
    context, which causes xfree in release_irq to fail an assert.
    
    To fix this, switch to a statically allocated irqaction that does not
    need to be freed in release_irq.
    
    Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>
    Reviewed-by: Mykola Kvach <mykola_kvach@xxxxxxxx>
    Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>
    
    v3->v4:
    * make irqactions static
    * collect RBs
    
    v2->v3:
    * no changes
    
    v1->v2:
    * use percpu actions
---
 xen/arch/arm/gic.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index 260ee64cca..ee75258fc3 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -386,10 +386,17 @@ void gic_dump_info(struct vcpu *v)
     gic_hw_ops->dump_state(v);
 }
 
+static DEFINE_PER_CPU_READ_MOSTLY(struct irqaction, irq_maintenance);
+
 void init_maintenance_interrupt(void)
 {
-    request_irq(gic_hw_ops->info->maintenance_irq, 0, maintenance_interrupt,
-                "irq-maintenance", NULL);
+    struct irqaction *maintenance = &this_cpu(irq_maintenance);
+
+    maintenance->name = "irq-maintenance";
+    maintenance->handler = maintenance_interrupt;
+    maintenance->dev_id = NULL;
+    maintenance->free_on_release = 0;
+    setup_irq(gic_hw_ops->info->maintenance_irq, 0, maintenance);
 }
 
 int gic_make_hwdom_dt_node(const struct domain *d,
--
generated by git-patchbot for /home/xen/git/xen.git#master