Re: [Xen-devel] [PATCH v4 00/15] Add support for Hygon Dhyana Family 18h processor

[Pu Wen <puwen@xxxxxxxx>]

On 2019/4/2 23:14, Andrew Cooper wrote:
> On 30/03/2019 10:40, Pu Wen wrote:
> > This patch series have been applied and tested successfully on Hygon
> > Dhyana processor, also been tested on AMD EPYC (family 17h) processor.
> > It works fine and makes no harm to the existing code.
> >
> > Reference:
> > [1] 
> > https://www.amd.com/system/files/TechDocs/54945_PPR_Family_17h_Models_00h-0Fh.pdf
> One thing I don't see in this series is anything about microcode
Right now Hygon load microcode in BIOS.

> loading.  Presumably you'll follow the AMD patchloading mechanism, with
> a blob you provide yourself?
We are exploring the Hygon patchloading mechanism, which will employ 
most of the functions of AMD's. We also try to make the Hygon microcode 
blob be compatible with the AMD one.
When the Hygon patchloading mechanism is practicable and it's necessary 
to load the Hygon microcode outside of BIOS, we'll send the patchloading 
patches to Xen and Linux mailing lists.
Thx.

--
Regards,
Pu Wen

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