Re: [PATCH] firmware: stratix10-svc: extend SVC driver to get the firmware version

[Richard Gong]

Hi David,

On 3/30/21 9:19 AM, David Laight wrote:
> From: richard.gong@xxxxxxxxxxxxxxx
> > Sent: 30 March 2021 15:33
> >
> > Extend Intel service layer driver to get the firmware version running at
> > FPGA device. Therefore FPGA manager driver, one of Intel service layer
> > driver's client, can decide whether to handle the newly added bitstream
> > authentication function based on the retrieved firmware version.
>
> Using the version number to detect features is just plain wrong.
>
> You should use something like a bitmap of supported features.

Firmware, which runs at EL3, returns the version to Intel service layer 
driver in a 64-bit value at the register. Intel service layer driver 
runs at EL1.

Regards,
Richard

> 	David
>
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