On Thu, Oct 26, 2023 at 01:53:29AM +0530, Sunil V L wrote: > On RISC-V platforms, apart from root interrupt controllers (which > provide local interrupts and IPI), other interrupt controllers in the > hierarchy are probed late. Enable this select this CONFIG option for > RISC-V platforms so that device drivers which connect to deferred > interrupt controllers can take appropriate action. Quite a bit of this series seems related to the question of interrupt controllers being probed "late". I don't see anything specific about *how* late this might be, but from the use of -EPROBE_DEFER in individual drivers (8250_pnp explicitly, and acpi_register_gsi() and pnp_irq() and acpi_pci_irq_enable(), which are called from driver .probe() paths) it seems like interrupt controllers might be detected even after devices that use them. That seems like a fairly invasive change to the driver probe flow. If we really need to do that, I think it might merit a little more background as justification since we haven't had to do it for any other arch yet. Bjorn > Signed-off-by: Sunil V L <sunilvl@xxxxxxxxxxxxxxxx> > --- > arch/riscv/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index 8c105a151e12..b62441aefa6a 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -12,6 +12,7 @@ config 32BIT > > config RISCV > def_bool y > + select ARCH_ACPI_DEFERRED_GSI if ACPI > select ACPI_GENERIC_GSI if ACPI > select ACPI_MCFG if (ACPI && PCI) > select ACPI_REDUCED_HARDWARE_ONLY if ACPI > -- > 2.39.2 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
