[PATCH v2] drm/i915/huc: Parse the GSC-enabled HuC binary

[Teres Alexis, Alan Previn]

On Tue, 2023-05-02 at 08:27 -0700, Ceraolo Spurio, Daniele wrote:
> The new binaries that support the 2-step authentication have contain the
> legacy-style binary, which we can use for loading the HuC via DMA. To
> find out where this is located in the image, we need to parse the meu
> manifest of the GSC binary. The manifest consist of a partition header
> followed by entries, one of which contains the offset we're looking for.
> Note that the DG2 GSC binary contains entries with the same names, but
> it doesn't contain a full legacy binary, so we need to skip assigning
> the dma offset in that case (which we can do by checking the ccs).
> Also, since we're now parsing the entries, we can extract the HuC
> version that way instead of using hardcoded offsets.
> 
> Note that the meu structure will be re-used for parsing the GSC binary,
> so they've been added in their own header.
> 
> v2: fix structure names to match meu defines (s/CPT/CPD/), update commit
>     message, check ccs validity, drop old version location defines.
> 
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
> ---
>  .../drm/i915/gt/uc/intel_gsc_meu_headers.h    |  74 ++++++++++

Compared line by line as per internal reviews and the spec.
All looks good to me - nice to see that additional ccs validity.
LGTM, Reviewed-by: Alan Previn <alan.previn.teres.alexis at intel.com>