irqchip/riscv-imsic: Add ACPI support

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RISC-V IMSIC interrupt controller provides IPI and MSI support.
Currently, DT based drivers setup the IPI feature early during boot but
defer setting up the MSI functionality. However, in ACPI systems, PCI
subsystem is probed early and assume MSI controller is already setup.
Hence, both IPI and MSI features need to be initialized early itself.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20240812005929.113499-16-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Sunil V L 2024-08-12 06:29:27 +05:30 • committed by Rafael J. Wysocki

parent aa143df8fd

commit fbe826b1c1

5 changed files with 134 additions and 30 deletions

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64

drivers/irqchip/irq-riscv-imsic-early.c

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32

drivers/irqchip/irq-riscv-imsic-platform.c

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57

drivers/irqchip/irq-riscv-imsic-state.c

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2

drivers/irqchip/irq-riscv-imsic-state.h

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9

include/linux/irqchip/riscv-imsic.h

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