From: Anup Patel <apatel@ventanamicro.com>
To: Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Frank Rowand <frowand.list@gmail.com>,
Conor Dooley <conor+dt@kernel.org>
Cc: Anup Patel <apatel@ventanamicro.com>,
devicetree@vger.kernel.org,
Saravana Kannan <saravanak@google.com>,
Anup Patel <anup@brainfault.org>,
linux-kernel@vger.kernel.org, Atish Patra <atishp@atishpatra.org>,
linux-riscv@lists.infradead.org,
Andrew Jones <ajones@ventanamicro.com>
Subject: [PATCH v6 00/14] Linux RISC-V AIA Support
Date: Wed, 19 Jul 2023 17:05:28 +0530 [thread overview]
Message-ID: <20230719113542.2293295-1-apatel@ventanamicro.com> (raw)
The RISC-V AIA specification is now frozen as-per the RISC-V international
process. The latest frozen specifcation can be found at:
https://github.com/riscv/riscv-aia/releases/download/1.0/riscv-interrupts-1.0.pdf
At a high-level, the AIA specification adds three things:
1) AIA CSRs
- Improved local interrupt support
2) Incoming Message Signaled Interrupt Controller (IMSIC)
- Per-HART MSI controller
- Support MSI virtualization
- Support IPI along with virtualization
3) Advanced Platform-Level Interrupt Controller (APLIC)
- Wired interrupt controller
- In MSI-mode, converts wired interrupt into MSIs (i.e. MSI generator)
- In Direct-mode, injects external interrupts directly into HARTs
For an overview of the AIA specification, refer the AIA virtualization
talk at KVM Forum 2022:
https://static.sched.com/hosted_files/kvmforum2022/a1/AIA_Virtualization_in_KVM_RISCV_final.pdf
https://www.youtube.com/watch?v=r071dL8Z0yo
To test this series, use QEMU v7.2 (or higher) and OpenSBI v1.2 (or higher).
These patches can also be found in the riscv_aia_v6 branch at:
https://github.com/avpatel/linux.git
Changes since v5:
- Rebased on Linux-6.5-rc2
- Updated the overall series to ensure that only IPI, timer, and
INTC drivers are probed very early whereas rest of the interrupt
controllers (such as PLIC, APLIC, and IMISC) are probed as
regular platform drivers.
- Renamed riscv_fw_parent_hartid() to riscv_get_intc_hartid()
- New PATCH1 to add fw_devlink support for msi-parent DT property
- New PATCH2 to ensure all INTC suppliers are initialized which in-turn
fixes the probing issue for PLIC, APLIC and IMSIC as platform driver
- New PATCH3 to use platform driver probing for PLIC
- Re-structured the IMSIC driver into two separate drivers: early and
platform. The IMSIC early driver (PATCH7) only initialized IMSIC state
and provides IPIs whereas the IMSIC platform driver (PATCH8) is probed
provides MSI domain for platform devices.
- Re-structure the APLIC platform driver into three separe sources: main,
direct mode, and MSI mode.
Changes since v4:
- Rebased on Linux-6.5-rc1
- Added "Dependencies" in the APLIC bindings (PATCH6 in v4)
- Dropped the PATCH6 which was changing the IOMMU DMA domain APIs
- Dropped use of IOMMU DMA APIs in the IMSIC driver (PATCH4)
Changes since v3:
- Rebased on Linux-6.4-rc6
- Droped PATCH2 of v3 series instead we now set FWNODE_FLAG_BEST_EFFORT via
IRQCHIP_DECLARE()
- Extend riscv_fw_parent_hartid() to support both DT and ACPI in PATCH1
- Extend iommu_dma_compose_msi_msg() instead of adding iommu_dma_select_msi()
in PATCH6
- Addressed Conor's comments in PATCH3
- Addressed Conor's and Rob's comments in PATCH7
Changes since v2:
- Rebased on Linux-6.4-rc1
- Addressed Rob's comments on DT bindings patches 4 and 8.
- Addessed Marc's comments on IMSIC driver PATCH5
- Replaced use of OF apis in APLIC and IMSIC drivers with FWNODE apis
this makes both drivers easily portable for ACPI support. This also
removes unnecessary indirection from the APLIC and IMSIC drivers.
- PATCH1 is a new patch for portability with ACPI support
- PATCH2 is a new patch to fix probing in APLIC drivers for APLIC-only systems.
- PATCH7 is a new patch which addresses the IOMMU DMA domain issues pointed
out by SiFive
Changes since v1:
- Rebased on Linux-6.2-rc2
- Addressed comments on IMSIC DT bindings for PATCH4
- Use raw_spin_lock_irqsave() on ids_lock for PATCH5
- Improved MMIO alignment checks in PATCH5 to allow MMIO regions
with holes.
- Addressed comments on APLIC DT bindings for PATCH6
- Fixed warning splat in aplic_msi_write_msg() caused by
zeroed MSI message in PATCH7
- Dropped DT property riscv,slow-ipi instead will have module
parameter in future.
Anup Patel (14):
RISC-V: Add riscv_get_intc_hartid() function
of: property: Add fw_devlink support for msi-parent
drivers: irqchip/riscv-intc: Mark all INTC nodes as initialized
irqchip/sifive-plic: Use platform driver probing for PLIC
irqchip/riscv-intc: Add support for RISC-V AIA
dt-bindings: interrupt-controller: Add RISC-V incoming MSI controller
irqchip: Add RISC-V incoming MSI controller early driver
irqchip/riscv-imsic: Add support for platform MSI irqdomain
irqchip/riscv-imsic: Add support for PCI MSI irqdomain
dt-bindings: interrupt-controller: Add RISC-V advanced PLIC
irqchip: Add RISC-V advanced PLIC driver for direct-mode
irqchip/riscv-aplic: Add support for MSI-mode
RISC-V: Select APLIC and IMSIC drivers
MAINTAINERS: Add entry for RISC-V AIA drivers
.../interrupt-controller/riscv,aplic.yaml | 172 ++++++
.../interrupt-controller/riscv,imsics.yaml | 172 ++++++
MAINTAINERS | 14 +
arch/riscv/Kconfig | 2 +
arch/riscv/include/asm/processor.h | 4 +-
arch/riscv/kernel/cpu.c | 19 +-
drivers/irqchip/Kconfig | 25 +-
drivers/irqchip/Makefile | 3 +
drivers/irqchip/irq-riscv-aplic-direct.c | 326 +++++++++++
drivers/irqchip/irq-riscv-aplic-main.c | 240 ++++++++
drivers/irqchip/irq-riscv-aplic-main.h | 53 ++
drivers/irqchip/irq-riscv-aplic-msi.c | 285 ++++++++++
drivers/irqchip/irq-riscv-imsic-early.c | 258 +++++++++
drivers/irqchip/irq-riscv-imsic-platform.c | 328 +++++++++++
drivers/irqchip/irq-riscv-imsic-state.c | 523 ++++++++++++++++++
drivers/irqchip/irq-riscv-imsic-state.h | 67 +++
drivers/irqchip/irq-riscv-intc.c | 46 +-
drivers/irqchip/irq-sifive-plic.c | 15 +-
drivers/of/property.c | 32 ++
include/linux/irqchip/riscv-aplic.h | 119 ++++
include/linux/irqchip/riscv-imsic.h | 86 +++
21 files changed, 2773 insertions(+), 16 deletions(-)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,aplic.yaml
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,imsics.yaml
create mode 100644 drivers/irqchip/irq-riscv-aplic-direct.c
create mode 100644 drivers/irqchip/irq-riscv-aplic-main.c
create mode 100644 drivers/irqchip/irq-riscv-aplic-main.h
create mode 100644 drivers/irqchip/irq-riscv-aplic-msi.c
create mode 100644 drivers/irqchip/irq-riscv-imsic-early.c
create mode 100644 drivers/irqchip/irq-riscv-imsic-platform.c
create mode 100644 drivers/irqchip/irq-riscv-imsic-state.c
create mode 100644 drivers/irqchip/irq-riscv-imsic-state.h
create mode 100644 include/linux/irqchip/riscv-aplic.h
create mode 100644 include/linux/irqchip/riscv-imsic.h
--
2.34.1
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next reply other threads:[~2023-07-19 11:36 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-19 11:35 Anup Patel [this message]
2023-07-19 11:35 ` [PATCH v6 01/14] RISC-V: Add riscv_get_intc_hartid() function Anup Patel
2023-07-19 11:35 ` [PATCH v6 02/14] of: property: Add fw_devlink support for msi-parent Anup Patel
2023-07-19 22:25 ` Saravana Kannan
2023-07-20 5:21 ` Anup Patel
2023-07-19 22:37 ` Rob Herring
2023-07-20 11:55 ` Anup Patel
2023-07-19 11:35 ` [PATCH v6 03/14] drivers: irqchip/riscv-intc: Mark all INTC nodes as initialized Anup Patel
2023-07-19 22:14 ` Saravana Kannan
2023-07-20 5:21 ` Anup Patel
2023-07-19 11:35 ` [PATCH v6 04/14] irqchip/sifive-plic: Use platform driver probing for PLIC Anup Patel
2023-07-27 8:41 ` Sunil V L
2023-08-02 12:25 ` Anup Patel
2023-07-19 11:35 ` [PATCH v6 05/14] irqchip/riscv-intc: Add support for RISC-V AIA Anup Patel
2023-07-19 11:35 ` [PATCH v6 06/14] dt-bindings: interrupt-controller: Add RISC-V incoming MSI controller Anup Patel
2023-07-19 11:35 ` [PATCH v6 07/14] irqchip: Add RISC-V incoming MSI controller early driver Anup Patel
2023-07-19 11:35 ` [PATCH v6 08/14] irqchip/riscv-imsic: Add support for platform MSI irqdomain Anup Patel
2023-07-19 11:35 ` [PATCH v6 09/14] irqchip/riscv-imsic: Add support for PCI " Anup Patel
2023-07-19 11:35 ` [PATCH v6 10/14] dt-bindings: interrupt-controller: Add RISC-V advanced PLIC Anup Patel
2023-07-19 11:35 ` [PATCH v6 11/14] irqchip: Add RISC-V advanced PLIC driver for direct-mode Anup Patel
2023-07-19 11:35 ` [PATCH v6 12/14] irqchip/riscv-aplic: Add support for MSI-mode Anup Patel
2023-07-19 11:35 ` [PATCH v6 13/14] RISC-V: Select APLIC and IMSIC drivers Anup Patel
2023-07-19 11:35 ` [PATCH v6 14/14] MAINTAINERS: Add entry for RISC-V AIA drivers Anup Patel
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