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Message-ID: <2dafd371-173e-1592-23d2-939b8a81dcbe@arm.com>
Date:   Mon, 15 May 2023 11:54:07 +0530
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Subject: Re: [PATCH V9 00/10] arm64/perf: Enable branch stack sampling
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To:     Will Deacon <will@kernel.org>
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
References: <20230315051444.1683170-1-anshuman.khandual@arm.com>
 <20230411130326.GA22736@willie-the-truck>
From:   Anshuman Khandual <anshuman.khandual@arm.com>
In-Reply-To: <20230411130326.GA22736@willie-the-truck>
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On 4/11/23 18:33, Will Deacon wrote:
> 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?

Hi Will,

I am back from a long vacation, will go through the earlier discussions
on this and rework the series as required.

- Anshuman