[PATCH] powerpc: Add PVN support for HeXin C2000 processor

Michael Ellerman mpe at ellerman.id.au
Wed Nov 29 16:28:56 AEDT 2023

Zhao Ke 赵 可 <ke.zhao at shingroup.cn> writes:
> On 2023/11/22 9:46, Michael Ellerman wrote:
>> Zhao Ke <ke.zhao at shingroup.cn> writes:
>>> HeXin Tech Co. has applied for a new PVN from the OpenPower Community
>>> for its new processor C2000. The OpenPower has assigned a new PVN
>>> and this newly assigned PVN is 0x0066, add pvr register related
>>> support for this PVN.
>>> Signed-off-by: Zhao Ke <ke.zhao at shingroup.cn>
>>> Link: https://discuss.openpower.foundation/t/how-to-get-a-new-pvr-for-processors-follow-power-isa/477/10
>> Hi Zhao Ke,
>> Thanks for the patch. Just a few questions.
>> Are you able to provide any further detail on the processor?
>> Your cputable entry claims that it's identical to the original Power8
>> core, can you comment at all on how true that is in practice?
> Basically, we made lots of design change for the new processor.
> For example:
>      1. redesign the interconnect of the fabric, from crossbar to mesh
>      2. redesign the memory subsystem, including the modification of L2 
> and L3 architecture
>      3. redesign the SMP bus
>      4. upgrade PCIe to gen5 and increase the number of lanes
>      5. upgrade ddr to DDR5, dimm direct connected, and the number of 
> channels
>      6. redesign the pervasive architecture, including debug/trace, 
> clock&power management, etc.

OK thanks for the detail.

Given all those changes I think you should not use "Power8" as the CPU
name. Whatever the lineage of the core design is, it's no longer a
literal "Power8", not even the same design using a different process

So I think you should call it "HeXin C2000" or similar.


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