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authorAnup Patel <apatel@ventanamicro.com>2023-10-03 07:43:51 +0300
committerMarc Zyngier <maz@kernel.org>2023-10-07 14:47:12 +0300
commite13cd66bd821be417c498a34928652db4ac6b436 (patch)
treea5277756e89222d3bb1387a5a61f85578ed3011e /drivers/irqchip
parent3a0fff0fb6a3861fa05416f21858cf0c75cbf944 (diff)
downloadlinux-e13cd66bd821be417c498a34928652db4ac6b436.tar.xz
irqchip/riscv-intc: Mark all INTC nodes as initialized
The RISC-V INTC local interrupts are per-HART (or per-CPU) so we create INTC IRQ domain only for the INTC node belonging to the boot HART. This means only the boot HART INTC node will be marked as initialized and other INTC nodes won't be marked which results downstream interrupt controllers (such as PLIC, IMSIC and APLIC direct-mode) not being probed due to missing device suppliers. To address this issue, we mark all INTC node for which we don't create IRQ domain as initialized. Reported-by: Dmitry Dunaev <dunaev@tecon.ru> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230926102801.1591126-1-dunaev@tecon.ru Link: https://lore.kernel.org/r/20231003044403.1974628-4-apatel@ventanamicro.com
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-riscv-intc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index 4adeee1bc391..e8d01b14ccdd 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -155,8 +155,16 @@ static int __init riscv_intc_init(struct device_node *node,
* for each INTC DT node. We only need to do INTC initialization
* for the INTC DT node belonging to boot CPU (or boot HART).
*/
- if (riscv_hartid_to_cpuid(hartid) != smp_processor_id())
+ if (riscv_hartid_to_cpuid(hartid) != smp_processor_id()) {
+ /*
+ * The INTC nodes of each CPU are suppliers for downstream
+ * interrupt controllers (such as PLIC, IMSIC and APLIC
+ * direct-mode) so we should mark an INTC node as initialized
+ * if we are not creating IRQ domain for it.
+ */
+ fwnode_dev_initialized(of_fwnode_handle(node), true);
return 0;
+ }
return riscv_intc_init_common(of_node_to_fwnode(node));
}