[PATCH v3 2/3] drivers/perf: riscv: Reset the counter to hpmevent mapping while starting cpus
Conor Dooley
conor at kernel.org
Wed Jun 26 09:37:07 PDT 2024
On Wed, Jun 26, 2024 at 09:18:46AM -0700, Atish Kumar Patra wrote:
> On Wed, Jun 26, 2024 at 6:24 AM Samuel Holland
> <samuel.holland at sifive.com> wrote:
> >
> > On 2024-06-26 2:23 AM, Atish Patra wrote:
> > > From: Samuel Holland <samuel.holland at sifive.com>
> > >
> > > Currently, we stop all the counters while a new cpu is brought online.
> > > However, the hpmevent to counter mappings are not reset. The firmware may
> > > have some stale encoding in their mapping structure which may lead to
> > > undesirable results. We have not encountered such scenario though.
> > >
> >
> > This needs:
> >
> > Signed-off-by: Samuel Holland <samuel.holland at sifive.com>
> >
>
> Oops. Sorry I missed that.
>
> @Alexandre Ghiti
What's Alex going to be able to do?
> @Palmer Dabbelt : Can you add that while picking up
> the patch or should I respin a v4 ?
b4 should pick the signoff up though. "perf: RISC-V: Check standard
event availability" seems to be missing your signoff though...
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