[PATCH] Add OPAL_GET_SYMBOL / OPAL_LOOKUP_SYMBOL

[Nicholas Piggin]

Oliver O'Halloran's on March 6, 2020 12:42 pm:
> On Fri, Feb 28, 2020 at 2:09 PM Nicholas Piggin <npiggin at gmail.com> wrote:
>>
>> These calls can be used by Linux to annotate BUG addresses with symbols,
>> look up symbol addresses in xmon, etc.
>>
>> This is preferable over having Linux parse the OPAL symbol map itself,
>> because OPAL's parsing code already exists for its own symbol printing,
>> and it can support other code regions than the skiboot symbols, e.g.,
>> the wake-up code in the HOMER (where CPUs have been seen to get stuck).
>>
>> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
>> ---
>>  core/opal.c                             |  2 +
>>  core/utils.c                            | 92 +++++++++++++++++++++++--
>>  doc/opal-api/opal-get-symbol-181.rst    | 42 +++++++++++
>>  doc/opal-api/opal-lookup-symbol-182.rst | 35 ++++++++++
>>  include/opal-api.h                      |  4 +-
>>  5 files changed, 168 insertions(+), 7 deletions(-)
>>  create mode 100644 doc/opal-api/opal-get-symbol-181.rst
>>  create mode 100644 doc/opal-api/opal-lookup-symbol-182.rst
>>
>> diff --git a/core/opal.c b/core/opal.c
>> index d6ff6027b..d9fc4fe05 100644
>> --- a/core/opal.c
>> +++ b/core/opal.c
>> @@ -142,6 +142,8 @@ int64_t opal_entry_check(struct stack_frame *eframe)
>>                 case OPAL_CEC_REBOOT:
>>                 case OPAL_CEC_REBOOT2:
>>                 case OPAL_SIGNAL_SYSTEM_RESET:
>> +               case OPAL_GET_SYMBOL:
>> +               case OPAL_LOOKUP_SYMBOL:
> 
> These names are still awful :|

Ah yeah sorry I said I'd change them didn't I? Anyway don't merge before
the kernel is on board with the idea.

Thanks,
Nick