RISC-V: Treat IPIs as normal Linux IRQs

Currently, the RISC-V kernel provides arch specific hooks (i.e. struct riscv_ipi_ops) to register IPI handling methods. The stats gathering of IPIs is also arch specific in the RISC-V kernel. Other architectures (such as ARM, ARM64, and MIPS) have moved away from custom arch specific IPI handling methods. Currently, these architectures have Linux irqchip drivers providing a range of Linux IRQ numbers to be used as IPIs and IPI triggering is done using generic IPI APIs. This approach allows architectures to treat IPIs as normal Linux IRQs and IPI stats gathering is done by the generic Linux IRQ subsystem. We extend the RISC-V IPI handling as-per above approach so that arch specific IPI handling methods (struct riscv_ipi_ops) can be removed and the IPI handling is done through the Linux IRQ subsystem. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230328035223.1480939-4-apatel@ventanamicro.com
2026-09-28 19:20:30 +00:00 · 2023-03-28 09:22:19 +05:30 · 2023-03-28 09:22:19 +05:30 · 832f15f426
commit 832f15f426
parent 0c60a31ce6
13 changed files with 283 additions and 239 deletions
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
--- a/arch/riscv/include/asm/smp.h
+++ b/arch/riscv/include/asm/smp.h
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
--- a/arch/riscv/kernel/cpu-hotplug.c
+++ b/arch/riscv/kernel/cpu-hotplug.c
--- a/arch/riscv/kernel/irq.c
+++ b/arch/riscv/kernel/irq.c
--- a/arch/riscv/kernel/sbi-ipi.c
+++ b/arch/riscv/kernel/sbi-ipi.c
--- a/arch/riscv/kernel/sbi.c
+++ b/arch/riscv/kernel/sbi.c
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
--- a/drivers/clocksource/timer-clint.c
+++ b/drivers/clocksource/timer-clint.c
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c