[PATCH 0/3] lib: sbi: fix PMU SSE event handling

[Clément Léger]

On 06/12/2024 23:25, Atish Patra wrote:
> On Fri, Dec 6, 2024 at 1:00 PM Clément Léger <cleger at rivosinc.com> wrote:
>>
>> While reworking the Linux SSE support, it appears that the PMU event
>> should not be available if the SSCOFPMF extension is not available since
>> there would be no IRQ. The specification isn't really clear on that point
>> so this is more like a RFC to check that. Ideally, the sse register call
> 
> Can you send a patch for SBI spec ? I think we can call it a local PMU
> overflow event
> rather than a PMU.

Yes sure, that makes more sense.  I'll also modify the possible return
value for register to add NOT_SUPPORTED in case some dependencies are
missing

Thanks,

Clément

> 
> We can add a note about the Sscofpmf dependency as well.
> 
>> should allow to refuse registering an event if the dependencies are not
>> satisfied but does not allow this yet.
>>
>> Clément Léger (3):
>>   lib: sbi: sse: Return a value from the register callback
>>   lib: sbi: sse: Disable injection if callbacks are set
>>   lib: sbi: pmu: Set a SSE register_cb() for event availability
>>
>>  include/sbi/sbi_sse.h |  2 +-
>>  lib/sbi/sbi_pmu.c     | 11 +++++++++++
>>  lib/sbi/sbi_sse.c     | 19 +++++++++++++++++--
>>  3 files changed, 29 insertions(+), 3 deletions(-)
>>
>> --
>> 2.45.2
>>
>>
>> --
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> 
> 
>