This series adds support for the below ECR approved by ASWG. 1) MADT - https://drive.google.com/file/d/1oMGPyOD58JaPgMl1pKasT-VKsIKia7zR/view?usp=sharing The series primarily enables irqchip drivers for RISC-V ACPI based platforms. In addition, PCI ACPI related functions are migrated from arm64 to common file so that we don't need to duplicate them for RISC-V. On RISC-V platforms, apart from root irqchips which provide local interrupts and IPI, all other interrupt controllers are probed late during boot. Hence, the drivers for the devices connected to these interrupt controllers which are probed late, should also support deferred probe. While ACPI platform devices/drivers seem to support deferred probe since they use acpi_irq_get(), the PNP devices and the PCI INTx expect GSIs are registered early. So, patches are required to enable few essential drivers to support deferred probe. To minimize the impact, a new CONFIG option is introduced which can be enabled only by the architecture like RISC-V which supports deferred irqchip probe. This series is based on Anup's AIA v11 series. Since Anup's AIA v11 is not merged yet and first time introducing deferred probe, this series is still kept as RFC. Looking forward for the feedback! Changes since RFC v1: 1) Abandoned swnode approach as per Marc's feedback. 2) To cope up with AIA series changes which changed irqchip driver probe from core_initcall() to platform_driver, added patches to support deferred probing. 3) Rebased on top of Anup's AIA v11 and added tags. To test the series, 1) Qemu should be built using the riscv_acpi_b2_v4 branch at https://github.com/vlsunil/qemu.git 2) EDK2 should be built using the instructions at: https://github.com/tianocore/edk2/blob/master/OvmfPkg/RiscVVirt/README.md 3) Build Linux using this series on top of Anup's AIA v11 series. Run Qemu: qemu-system-riscv64 \ -M virt,pflash0=pflash0,pflash1=pflash1,aia=aplic-imsic \ -m 2G -smp 8 \ -serial mon:stdio \ -device virtio-gpu-pci -full-screen \ -device qemu-xhci \ -device usb-kbd \ -blockdev node-name=pflash0,driver=file,read-only=on,filename=RISCV_VIRT_CODE.fd \ -blockdev node-name=pflash1,driver=file,filename=RISCV_VIRT_VARS.fd \ -netdev user,id=net0 -device virtio-net-pci,netdev=net0 \ -kernel arch/riscv/boot/Image \ -initrd rootfs.cpio \ -append "root=/dev/ram ro console=ttyS0 rootwait earlycon=uart8250,mmio,0x10000000" To boot with APLIC only, use aia=aplic. To boot with PLIC, remove aia= option. This series is also available in acpi_b2_v2_riscv_aia_v11 branch at https://github.com/vlsunil/linux.git Based-on: 20231023172800.315343-1-apatel@xxxxxxxxxxxxxxxx (https://lore.kernel.org/lkml/20231023172800.315343-1-apatel@xxxxxxxxxxxxxxxx/) Sunil V L (21): arm64: PCI: Migrate ACPI related functions to pci-acpi.c RISC-V: ACPI: Implement PCI related functionality ACPI: Kconfig: Introduce new option to support deferred GSI probe ACPI: irq: Add support for deferred probe in acpi_register_gsi() pnp.h: Return -EPROBE_DEFER for disabled IRQ resource in pnp_irq() RISC-V: Kconfig: Select deferred GSI probe for ACPI systems serial: 8250_pnp: Add support for deferred probe ACPI: pci_irq: Avoid warning for deferred probe in acpi_pci_irq_enable() ACPI: scan.c: Add weak arch specific function to reorder the IRQCHIP probe ACPI: RISC-V: Implement arch function to reorder irqchip probe entries PCI: MSI: Add helper function to set system wide MSI support PCI: pci-acpi.c: Return correct value from pcibios_alloc_irq() irqchip: riscv-intc: Add ACPI support for AIA irqchip: riscv-imsic: Add ACPI support irqchip: riscv-aplic: Add ACPI support irqchip: irq-sifive-plic: Add ACPI support ACPI: bus: Add RINTC IRQ model for RISC-V irqchip: riscv-intc: Set ACPI irqmodel ACPI: bus: Add acpi_riscv_init function ACPI: RISC-V: Create APLIC platform device ACPI: RISC-V: Create PLIC platform device arch/arm64/kernel/pci.c | 191 --------------------- arch/riscv/Kconfig | 3 + arch/riscv/include/asm/irq.h | 31 ++++ arch/riscv/kernel/acpi.c | 31 ++-- drivers/acpi/Kconfig | 3 + drivers/acpi/bus.c | 4 + drivers/acpi/irq.c | 12 +- drivers/acpi/pci_irq.c | 7 +- drivers/acpi/riscv/Makefile | 2 +- drivers/acpi/riscv/init.c | 15 ++ drivers/acpi/riscv/init.h | 6 + drivers/acpi/riscv/irq.c | 120 +++++++++++++ drivers/acpi/scan.c | 3 + drivers/irqchip/irq-riscv-aplic-direct.c | 22 ++- drivers/irqchip/irq-riscv-aplic-main.c | 105 ++++++++--- drivers/irqchip/irq-riscv-aplic-main.h | 1 + drivers/irqchip/irq-riscv-aplic-msi.c | 10 +- drivers/irqchip/irq-riscv-imsic-early.c | 52 +++++- drivers/irqchip/irq-riscv-imsic-platform.c | 51 ++++-- drivers/irqchip/irq-riscv-imsic-state.c | 128 +++++++------- drivers/irqchip/irq-riscv-imsic-state.h | 2 +- drivers/irqchip/irq-riscv-intc.c | 114 +++++++++++- drivers/irqchip/irq-sifive-plic.c | 113 ++++++++++-- drivers/pci/msi/msi.c | 5 + drivers/pci/pci-acpi.c | 182 ++++++++++++++++++++ drivers/pci/pci.h | 2 + drivers/tty/serial/8250/8250_pnp.c | 18 +- include/linux/acpi.h | 9 + include/linux/irqchip/riscv-imsic.h | 10 ++ include/linux/pnp.h | 10 +- 30 files changed, 906 insertions(+), 356 deletions(-) create mode 100644 drivers/acpi/riscv/init.c create mode 100644 drivers/acpi/riscv/init.h create mode 100644 drivers/acpi/riscv/irq.c -- 2.39.2
