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[v8,04/16] drivers: irqchip/riscv-intc: Mark all INTC nodes as initialized

Message ID 20230912174928.528414-5-apatel@ventanamicro.com (mailing list archive)
State Superseded, archived
Headers show
Series Linux RISC-V AIA Support | expand

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Context Check Description
conchuod/cover_letter success Series has a cover letter
conchuod/tree_selection success Guessed tree name to be fixes at HEAD e0152e7481c6
conchuod/fixes_present success Fixes tag present in non-next series
conchuod/maintainers_pattern success MAINTAINERS pattern errors before the patch: 2 and now 2
conchuod/verify_signedoff success Signed-off-by tag matches author and committer
conchuod/kdoc success Errors and warnings before: 0 this patch: 0
conchuod/build_rv64_clang_allmodconfig success Errors and warnings before: 9 this patch: 9
conchuod/module_param success Was 0 now: 0
conchuod/build_rv64_gcc_allmodconfig success Errors and warnings before: 9 this patch: 9
conchuod/build_rv32_defconfig success Build OK
conchuod/dtb_warn_rv64 success Errors and warnings before: 39 this patch: 39
conchuod/header_inline success No static functions without inline keyword in header files
conchuod/checkpatch success total: 0 errors, 0 warnings, 0 checks, 17 lines checked
conchuod/build_rv64_nommu_k210_defconfig success Build OK
conchuod/verify_fixes success No Fixes tag
conchuod/build_rv64_nommu_virt_defconfig success Build OK

Commit Message

Anup Patel Sept. 12, 2023, 5:49 p.m. UTC
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 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.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
 drivers/irqchip/irq-riscv-intc.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index 65f4a2afb381..4e2704bc25fb 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 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));
 }