Re: [PATCH 1/4] riscv: add UltraRISC SoC family Kconfig support

[Jia Wang]

On 2026-03-16 14:39 +0000, Conor Dooley wrote:
> On Mon, Mar 16, 2026 at 03:06:57PM +0800, Jia Wang wrote:
> > The first SoC in the UltraRISC series is UR-DP1000, containing octa
> > UltraRISC C100 cores.
> > 
> > Signed-off-by: Jia Wang <wangjia@xxxxxxxxxxxxx>
> > ---
> >  arch/riscv/Kconfig.socs | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> > 
> > diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
> > index d621b85dd63b..f49d3ccaacde 100644
> > --- a/arch/riscv/Kconfig.socs
> > +++ b/arch/riscv/Kconfig.socs
> > @@ -84,6 +84,16 @@ config ARCH_THEAD
> >  	help
> >  	  This enables support for the RISC-V based T-HEAD SoCs.
> >  
> > +config ARCH_ULTRARISC
> > +	bool "UltraRISC RISC-V SoCs"
> > +	depends on MMU && !XIP_KERNEL
> 
> Why do you depend on "MMU && !XIP_KERNEL"?
>
Hi Conor,

Thanks for the review.

The dependency on "MMU" was added conservatively, but the DP1000 hardware
does not strictly require MMU. I will remove this dependency in the
next version of the patch.

The "!XIP_KERNEL" dependency is retained because the platform does not
support executing the kernel directly from storage, so the kernel
must be loaded into RAM before execution.

Best regards,
Jia 
> > +	help
> > +	 This enables support for UltraRISC SoC platform hardware,
> > +	 including boards based on the UR-DP1000.
> > +	 UR-DP1000 is an 8-core 64-bit RISC-V SoC that supports
> > +	 the RV64GCBHX ISA. It supports Hardware Virtualization
> > +	 and RISC-V RV64 ISA H(v1.0) Extension.
> > +
> >  config ARCH_VIRT
> >  	bool "QEMU Virt Machine"
> >  	select POWER_RESET
> > 
> > -- 
> > 2.34.1
> >