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lib: sbi_irqchip: Support irqchip device targetting subset of harts

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It is possible to have platform where an irqchip device targets
a subset of harts and there are multiple irqchip devices to cover
all harts.

To support this scenario:
1) Add target_harts hartmask to struct sbi_irqchip_device which
   represents the set of harts targetted by the irqchip device
2) Call warm_init() and process_hwirqs() callbacks of an irqchip
   device on a hart only if irqchip device targets that particular
   hart

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260213055342.3124872-6-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-02-13 11:23:39 +05:30
committed by Anup Patel
parent 5a300b32d5
commit b55bb4cdcb
5 changed files with 74 additions and 23 deletions
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5
lib/utils/irqchip/plic.c
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@@ -276,11 +276,10 @@ int plic_cold_irqchip_init(struct plic_data *plic)
continue;
plic_set_hart_data_ptr(sbi_hartindex_to_scratch(i), plic);
sbi_hartmask_set_hartindex(i, &plic->irqchip.target_harts);
}
/* Register irqchip device */
plic->irqchip.warm_init = plic_warm_irqchip_init;
sbi_irqchip_add_device(&plic->irqchip);
return 0;
return sbi_irqchip_add_device(&plic->irqchip);
}