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SubjectRe: [PATCHv1 3/4] dt-bindings: fpga: add authenticate-fpga-config property
On Sun, Nov 15, 2020 at 11:21:06AM -0800, Moritz Fischer wrote:
> Hi Richard,
>
> On Thu, Nov 12, 2020 at 12:06:42PM -0600, richard.gong@linux.intel.com wrote:
> > From: Richard Gong <richard.gong@intel.com>
> >
> > Add authenticate-fpga-config property for FPGA bitstream authentication.
> >
> > Signed-off-by: Richard Gong <richard.gong@intel.com>
> > ---
> > Documentation/devicetree/bindings/fpga/fpga-region.txt | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > index e811cf8..7a512bc 100644
> > --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > @@ -187,6 +187,7 @@ Optional properties:
> > - external-fpga-config : boolean, set if the FPGA has already been configured
> > prior to OS boot up.
> > - encrypted-fpga-config : boolean, set if the bitstream is encrypted
> > +- authenticate-fpga-config : boolean, set if do bitstream authentication
> It is unclear to me from the description whether this entails
> authentication + reconfiguration or just authentication.
>
> If the latter is the case this should probably be described as such.

If it is just authentication, do we still need to disable bridges in
fpga_region_program_fpga?

I'm wondering if the FPGA functionalities could still be working when
the authenticating is ongoing, or when the authenticating is failed.

Thanks,
Yilun

>
> > - region-unfreeze-timeout-us : The maximum time in microseconds to wait for
> > bridges to successfully become enabled after the region has been
> > programmed.
> > --
> > 2.7.4
> >
>
> Thanks

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