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Date:   Tue, 11 Apr 2023 14:03:29 +0100
From:   Will Deacon <will@kernel.org>
To:     Anshuman Khandual <anshuman.khandual@arm.com>
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        catalin.marinas@arm.com, mark.rutland@arm.com,
        Mark Brown <broonie@kernel.org>,
        James Clark <james.clark@arm.com>,
        Rob Herring <robh@kernel.org>, Marc Zyngier <maz@kernel.org>,
        Suzuki Poulose <suzuki.poulose@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        linux-perf-users@vger.kernel.org
Subject: Re: [PATCH V9 00/10] arm64/perf: Enable branch stack sampling
Message-ID: <20230411130326.GA22736@willie-the-truck>
References: <20230315051444.1683170-1-anshuman.khandual@arm.com>
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Hi Anshuman

On Wed, Mar 15, 2023 at 10:44:34AM +0530, Anshuman Khandual wrote:
> This series enables perf branch stack sampling support on arm64 platform
> via a new arch feature called Branch Record Buffer Extension (BRBE). All
> relevant register definitions could be accessed here.
> 
> https://developer.arm.com/documentation/ddi0601/2021-12/AArch64-Registers
> 
> This series applies on 6.3-rc1 after applying the following patch from Mark
> which allows enums in SysregFields blocks in sysreg tools.
> 
> https://lore.kernel.org/all/20230306114836.2575432-1-mark.rutland@arm.com/

As mentioned by Mark at:

https://lore.kernel.org/r/ZB2sGrsbr58ttoWI@FVFF77S0Q05N

this conflicts with supporting PMUv3 on AArch32. Please can you rebase onto
for-next/perf, which will mean moving this driver back into drivers/perf/
now?

Thanks,

Will