[Skiboot] [PATCH 1/2] opal-prd: Add get_prd_flags to host interfaces
jk at ozlabs.org
Wed Sep 14 11:36:16 AEST 2016
>> * @brief Query the HBRT host for a list of fixes
>> * There are times when workarounds need to be put into place to handle
>> * issues with the hosting layer (e.g. opal-prd) while fixes are not yet
>> * released. This is especially true because of the disconnected
>> * streams for the firmware and the hosting environment.
>> * @param i_set Indicates which set of fixes we're checking
>> * see HBRT_FIX_LIST_SET...
>> * @return a bitmask containing the relevant flags for the current
>> * implementation, see HBRT_FIX_FLAGS_...
>> uint64_t (*get_fix_list)( uint64_t i_set );
>> /* OPAL fixes */
>> #define HBRT_FIX_LIST_SET0_OPAL 0
>> #define HBRT_FIX_FLAGS_OPAL_HAS_XSCOM_RC (1ul << 0)
>> /* PHYP fixes */
>> #define HBRT_FIX_LIST_SET1_PHYP 1
>> If we run over 64 flags, we'd just make a HBRT_FIX_LIST_SET2_OPAL2 2, etc.
> Yep, that makes sense. We'd just need to define the case where the 'set'
> is unknown to opal-prd or pHyp. I'd propose just returning zero, as long
> as we can ensure that zero-bit defaults will be acceptable in future.
On further thoughts, this could makes the interface a little difficult
to implement, mostly on the HBRT side.
If you're running under phyp, would you ever request the flags for
SET0_OPAL? If so, it would indicate that the XSCOM_RC flags is *not* set
(since it's returning 0 for an unknown set)? Or would the phyp
implementation need to know about the OPAL flags?
Or should we make the sets based on functionality, rather than
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