[PATCH v8 00/24] Linux SBI MPXY and RPMI drivers

[Anup Patel]

On Fri, Jul 4, 2025 at 1:15 PM Krzysztof Kozlowski <krzk at kernel.org> wrote:
>
> On Fri, Jul 04, 2025 at 12:33:32PM +0530, Anup Patel wrote:
> > The SBI v3.0 (MPXY extension) [1] and RPMI v1.0 [2] specifications
> > are frozen and finished 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_v8 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 v7:
> >  - Addressed comments on PATCH3, PATCH7, PATCH10, PATCH14, and PATCH21
>
> Which comments? What exactly did you change? Provide in-patch changelogs
> explaining this, because what you wrote is way too vague.
>

Apologies for being a bit lazy here. Most changes are pretty straight forward
except the improvements in PATCH14. More detailed change log is below ...

Changes since v7:
 - Addressed enum related nits in PATCH3
   (Refer, https://lore.kernel.org/all/CAK9=C2VxhC6soxHtmacedbeCU=rFi84Br1RvN2uPcBKoLhRaJw@mail.gmail.com/)
 - Addressed comments in PATCH7 as follows:
   - Added minmax.h to includes
   - Removed "rc" variable from mpxy_mbox_send_rpmi_data()
   - Removed alignment and other checks from mpxy_mbox_peek_rpmi_data()
   - Created separate function to restrict scope of channel_ids used
in mpxy_mbox_probe()
   (Refer, https://lore.kernel.org/all/CAK9=C2Ume2CmBYHYob7HSJHu=ZdfdWM+4JYPgFJ9Hir5Oi8cOg@mail.gmail.com/)
 - Improved comments for struct rpmi_clk_rates in PATCH10
   (Refer, https://lore.kernel.org/all/CAK9=C2VfvsbFTjecQm0OSsssXbff7wC4fqWf3CTmnpWSiaLcBw@mail.gmail.com/)
 - Improved refactoring of acpi_fwnode_get_reference_args() in PATCH14
   (Refer, https://lore.kernel.org/all/20250702051345.1460497-15-apatel@ventanamicro.com/)
 - Improve nargs_count parsing in acpi_fwnode_get_reference_args() for PATCH15
   (Refer, https://lore.kernel.org/all/20250702051345.1460497-16-apatel@ventanamicro.com/)
 - Added more comments describing why need to explicitly set device
MSI domain in PATCH21
   (Refer, https://lore.kernel.org/all/aGaUmpw1pVWNAmpb@smile.fi.intel.com/)

Regards,
Anup