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Message-ID: <CABb+yY1UAwQiLCFY0Om1wsG+Hf_MobLfrEMx8JVdvoehVZ-g0A@mail.gmail.com> Date: Sun, 22 Jun 2025 11:26:21 -0500 From: Jassi Brar <jassisinghbrar@...il.com> To: Anup Patel <apatel@...tanamicro.com> Cc: Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, "Rafael J . Wysocki" <rafael@...nel.org>, Mika Westerberg <mika.westerberg@...ux.intel.com>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>, Uwe Kleine-König <ukleinek@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley <paul.walmsley@...ive.com>, Len Brown <lenb@...nel.org>, Sunil V L <sunilvl@...tanamicro.com>, Rahul Pathak <rpathak@...tanamicro.com>, Leyfoon Tan <leyfoon.tan@...rfivetech.com>, Atish Patra <atish.patra@...ux.dev>, Andrew Jones <ajones@...tanamicro.com>, Samuel Holland <samuel.holland@...ive.com>, Anup Patel <anup@...infault.org>, linux-clk@...r.kernel.org, devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v6 00/23] Linux SBI MPXY and RPMI drivers On Wed, Jun 18, 2025 at 7:14 AM Anup Patel <apatel@...tanamicro.com> wrote: > > The SBI v3.0 (MPXY extension) [1] and RPMI v1.0 [2] specifications > are frozen and in public review at the RISC-V International. > > Currently, most of the RPMI and MPXY drivers are in OpenSBI whereas > Linux only has SBI MPXY mailbox controller driver, RPMI clock driver > and RPMI system MSI driver This series also includes ACPI support > for SBI MPXY mailbox controller and RPMI system MSI drivers. > > These patches can be found in the riscv_sbi_mpxy_mailbox_v6 branch > at: https://github.com/avpatel/linux.git > > To test these patches, boot Linux on "virt,rpmi=on,aia=aplic-imsic" > machine with OpenSBI and QEMU from the dev-upstream branch at: > https://github.com/ventanamicro/opensbi.git > https://github.com/ventanamicro/qemu.git > > [1] https://github.com/riscv-non-isa/riscv-sbi-doc/releases > [2] https://github.com/riscv-non-isa/riscv-rpmi/releases > > Changes since v5: > - Rebased the series on Linux-6.16-rc2 > - Added Conor's Reviewed-by in all DT binding patches > - Addressed Andy's comments on PATCH5 > - Addressed Tglx's comments on PATCH12 and PATCH21 > > Changes since v4: > - Rebased the series on Linux-6.16-rc1 > - Dropped PATCH1 since a similar change is already merged > https://lore.kernel.org/linux-riscv/20250523101932.1594077-4-cleger@rivosinc.com/ > - Addressed Andy's comments on PATCH4, PATCH5, PATCH6, PATCH7, > PATCH13, and PATCH17 > - Addressed Atish's comments on PATCH11 and PATCH12 > - Addressed Conor's comments on PATCH9 > > Changes since v3: > - Rebased the series on Linux-6.15-rc7 > - Updated PATCH2 DT bindings as-per Rob's suggestion > - Improved request_threaded_irq() usage in PATCH7 > - Updated PATCH10 clk-rpmi driver as-per commments from Andy > - Updated PATCH13 irq-riscv-rpmi-sysmsi driver as-per comments > from Andy and Tglx > - Addressed ACPI related comments in PATCH14, PATCH15, PATCH18, > PATCH20 and PATCH21 > > Changes since v2: > - Dropped the "RFC" tag from series since the SBI v3.0 and > RPMI v1.0 specifications are now frozen > - Rebased the series on Linux-6.15-rc5 > - Split PATCH8 of v2 into two patches adding separate DT > bindings for "riscv,rpmi-mpxy-clock" and "riscv,rpmi-clock" > - Split PATCH10 of v2 into two patches adding separate DT > bindings for "riscv,rpmi-mpxy-system-msi" and > "riscv,rpmi-system-msi" > - Addressed comments from TGLX on PATCH11 of v2 adding irqchip > driver for RPMI system MSI > - Addressed ACPI related comments in PATCH15 and PATCH16 of v2 > - New PATCH17 and PATCH18 in this series > > Changes since v1: > - Addressed DT bindings related comments in PATCH2, PATCH3, and > PATCH7 of v1 series > - Addressed comments in PATCH6 and PATCH8 of v1 series > - New PATCH6 in v2 series to allow fwnode based mailbox channel > request > - New PATCH10 and PATCH11 to add RPMI system MSI based interrupt > controller driver > - New PATCH12 to PATCH16 which adds ACPI support in SBI MPXY > mailbox driver and RPMI system MSI driver > - New PATCH17 to enable required kconfig option to allow graceful > shutdown on QEMU virt machine > > Anup Patel (13): > dt-bindings: mailbox: Add bindings for RPMI shared memory transport > dt-bindings: mailbox: Add bindings for RISC-V SBI MPXY extension > RISC-V: Add defines for the SBI message proxy extension > mailbox: Add common header for RPMI messages sent via mailbox > mailbox: Allow controller specific mapping using fwnode > mailbox: Add RISC-V SBI message proxy (MPXY) based mailbox driver > dt-bindings: clock: Add RPMI clock service message proxy bindings > dt-bindings: clock: Add RPMI clock service controller bindings > dt-bindings: Add RPMI system MSI message proxy bindings > dt-bindings: Add RPMI system MSI interrupt controller bindings > irqchip: Add driver for the RPMI system MSI service group > RISC-V: Enable GPIO keyboard and event device in RV64 defconfig > MAINTAINERS: Add entry for RISC-V RPMI and MPXY drivers > > Rahul Pathak (1): > clk: Add clock driver for the RISC-V RPMI clock service group > > Sunil V L (9): > ACPI: property: Refactor acpi_fwnode_get_reference_args() > ACPI: property: Add support for cells property > ACPI: scan: Update honor list for RPMI System MSI > ACPI: RISC-V: Create interrupt controller list in sorted order > ACPI: RISC-V: Add support to update gsi range > ACPI: RISC-V: Add RPMI System MSI to GSI mapping > irqchip/irq-riscv-imsic-early: Export imsic_acpi_get_fwnode() > mailbox/riscv-sbi-mpxy: Add ACPI support > irqchip/riscv-rpmi-sysmsi: Add ACPI support > > .../bindings/clock/riscv,rpmi-clock.yaml | 64 ++ > .../bindings/clock/riscv,rpmi-mpxy-clock.yaml | 64 ++ > .../riscv,rpmi-mpxy-system-msi.yaml | 67 ++ > .../riscv,rpmi-system-msi.yaml | 74 ++ > .../mailbox/riscv,rpmi-shmem-mbox.yaml | 124 ++ > .../bindings/mailbox/riscv,sbi-mpxy-mbox.yaml | 51 + > MAINTAINERS | 15 + > arch/riscv/configs/defconfig | 2 + > arch/riscv/include/asm/irq.h | 6 + > arch/riscv/include/asm/sbi.h | 63 + > drivers/acpi/property.c | 123 +- > drivers/acpi/riscv/irq.c | 75 +- > drivers/acpi/scan.c | 2 + > drivers/base/property.c | 2 +- > drivers/clk/Kconfig | 8 + > drivers/clk/Makefile | 1 + > drivers/clk/clk-rpmi.c | 590 ++++++++++ > drivers/irqchip/Kconfig | 7 + > drivers/irqchip/Makefile | 1 + > drivers/irqchip/irq-riscv-imsic-early.c | 2 + > drivers/irqchip/irq-riscv-rpmi-sysmsi.c | 324 ++++++ > drivers/mailbox/Kconfig | 11 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox.c | 65 +- > drivers/mailbox/riscv-sbi-mpxy-mbox.c | 1012 +++++++++++++++++ > include/linux/byteorder/generic.h | 16 + > include/linux/mailbox/riscv-rpmi-message.h | 238 ++++ > include/linux/mailbox_controller.h | 3 + > include/linux/wordpart.h | 16 + > 29 files changed, 2948 insertions(+), 80 deletions(-) > create mode 100644 Documentation/devicetree/bindings/clock/riscv,rpmi-clock.yaml > create mode 100644 Documentation/devicetree/bindings/clock/riscv,rpmi-mpxy-clock.yaml > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,rpmi-mpxy-system-msi.yaml > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,rpmi-system-msi.yaml > create mode 100644 Documentation/devicetree/bindings/mailbox/riscv,rpmi-shmem-mbox.yaml > create mode 100644 Documentation/devicetree/bindings/mailbox/riscv,sbi-mpxy-mbox.yaml > create mode 100644 drivers/clk/clk-rpmi.c > create mode 100644 drivers/irqchip/irq-riscv-rpmi-sysmsi.c > create mode 100644 drivers/mailbox/riscv-sbi-mpxy-mbox.c > create mode 100644 include/linux/mailbox/riscv-rpmi-message.h > I am ok with the mailbox patches. How are these to be picked into mailbox and other subsystems? Maybe sculpt out a separate patchset for the mailbox? Thanks -Jassi
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