From: Ravi Bangoria <ravi.bangoria@amd.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Ian Rogers <irogers@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
James Clark <james.clark@linaro.org>, <x86@kernel.org>,
<linux-perf-users@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
"Manali Shukla" <manali.shukla@amd.com>,
Santosh Shukla <santosh.shukla@amd.com>,
Ananth Narayan <ananth.narayan@amd.com>,
Sandipan Das <sandipan.das@amd.com>,
Ravi Bangoria <ravi.bangoria@amd.com>
Subject: Re: [PATCH v2 3/8] perf test ibs: Remove obsolete privilege test
Date: Fri, 8 May 2026 11:35:27 +0530 [thread overview]
Message-ID: <43179782-f1bc-4590-a4ed-0ce189e08ce9@amd.com> (raw)
In-Reply-To: <af0tTxZNLdtohH8A@google.com>
>> Older IBS implementations lacked a hardware privilege filter, so the
>> kernel enabled swfilt=1. Newer AMD CPUs will provide privilege filtering
>> via the RIP[63] bit, making swfilt redundant. Remove the perf unit test
>> that assumes IBS has no hardware-assisted privilege filter.
>
> Can you add a check for CPU model or capability for this?
> Probably we want to keep this test for older models..
Fixed and posted v3:
https://lore.kernel.org/r/20260508060004.2575-1-ravi.bangoria@amd.com
Thanks Namhyung.
Ravi
next prev parent reply other threads:[~2026-05-08 6:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 6:11 [PATCH v2 0/8] perf tools amd ibs: Fixes + Zen6 enhancements Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 1/8] perf test amd ibs: Fix incorrect kernel version check Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 2/8] perf tool ibs: Sync AMD IBS header file Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 3/8] perf test ibs: Remove obsolete privilege test Ravi Bangoria
2026-05-08 0:24 ` Namhyung Kim
2026-05-08 6:05 ` Ravi Bangoria [this message]
2026-04-30 6:11 ` [PATCH v2 4/8] perf amd ibs: Suppress bogus TlbRefillLat and DCPhysAd on Zen4+ Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 5/8] perf amd ibs: Make Fetch status bits dependent on PhyAddrValid for newer platforms Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 6/8] perf amd ibs: Decode Remote-Socket flag in IBS OP raw dump Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 7/8] perf amd ibs: Decode Streaming-store " Ravi Bangoria
2026-04-30 6:11 ` [PATCH v2 8/8] perf doc: Document new IBS capabilities in man page Ravi Bangoria
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