[PATCH 1/2] perf: Add more generic branch types

[Anshuman Khandual]

On 2/2/22 5:28 PM, Mark Rutland wrote:
> Hi Anshuman,
> 
> On Fri, Jan 28, 2022 at 11:14:12AM +0530, Anshuman Khandual wrote:
>> This expands generic branch type classification by adding some more entries
>> , that can still be represented with the existing 4 bit 'type' field. While
>> here this also updates the x86 implementation with these new branch types.
> It looks like there's some whitespace damage here.
> 
>>From a quick scan of the below, I think the "exception return" and "IRQ
> exception" types are somewhat generic, and could be added now (aside from any
> bikeshedding over names), but:

Hi Mark,

I have sent a patch adding just PERF_BR_ERET and PERF_BR_IRQ which are generic
enough to be included now. The 'type' field still got 3 more places for future
use. Hence we should try and include two more branch types, before adding the
last entry for ABI expansion (e.g PERF_BR_EXTENDED).

https://lore.kernel.org/all/1645681014-3346-1-git-send-email-anshuman.khandual@arm.com/

- Anshuman