riscv: Make irqchip support pluggable
We will be having different types of irqchip:
1) PLIC emulated by user-space
2) AIA APLIC and IMSIC provided by in-kernel KVM module
To support above, we de-couple PLIC specific code from generic
RISC-V code (such as FDT generation) so that we can easily add
other types of irqchip. As part of the PLIC de-coupling, we
introduce various riscv_irqchip_xyz global variable to describe
the chosen irqchip hence PLIC is no longer required to register
itself using device__register().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/20231118132847.758785-4-apatel@ventanamicro.com
Signed-off-by: Will Deacon <will@kernel.org>
6 files changed
