Re: [PATCH v3 0/2] perf: arm64: Kernel support for Dwarf unwinding through SVE functions

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On Thu, Sep 22, 2022 at 03:31:20PM +0100, James Clark wrote:
> 
> 
> On 22/09/2022 15:04, Will Deacon wrote:
> > On Thu, Sep 01, 2022 at 02:26:56PM +0100, James Clark wrote:
> >> I'm resubmitting this with a few of the changes suggested by Will on V2.
> >>
> >> I haven't made any changes regarding the open questions about the
> >> discoverability or saving the new reg and passing to output_sample()
> >> because I think it's best to be consistent with the implementations on
> >> other platforms first. I have explained in more detail on v2 [1].
> >>
> >> [1]: https://lore.kernel.org/lkml/5fcf1a6f-c8fb-c296-992e-18aae8874095@xxxxxxx/
> > 
> > Fair enough, I can't argue against being consistent.
> > 
> > Given that this exposes subtle new user ABI, do we have any coverage in
> > the selftests? If not, please could you add something?
> > 
> 
> Thanks, I will do that. I assume you mean the self tests in
> tools/perf/tests and not some non Perf tests?

I hadn't thought much about it, so wherever is best. It would just be nice
to have something we can run to make sure that this continues to work as
intended.

Will



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