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Fri, 27 Mar 2026 10:51:59 -0700 (PDT) Received: from [10.245.244.175] ([134.191.227.48]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48725ebe9dfsm30215925e9.4.2026.03.27.10.51.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Mar 2026 10:51:58 -0700 (PDT) Message-ID: <4a19dd6c2ee07bf70ac136747e1ea5bfd8e41888.camel@gmail.com> Subject: Re: [PATCH v1 0/2] platform/x86/intel-uncore-freq: Expose instance ID in the sysfs From: Artem Bityutskiy To: Maciej Wieczor-Retman , hansg@kernel.org, srinivas.pandruvada@linux.intel.com, ilpo.jarvinen@linux.intel.com Cc: linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Date: Fri, 27 Mar 2026 19:51:54 +0200 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2026-03-27 at 15:36 +0000, Maciej Wieczor-Retman wrote: > on newer systems that can have multiple clusters on a single die, the > intel-uncore-freq driver behaves differently and the domain_id is a > globally unique value - unique on all TPMI devices. Therefore it's > difficult to match a specific instance to a set of UFS registers for > example visible through /sys/kernel/debug/tpmi directories. Although, I'd say that the key point isn't that "domain_id is globally unique" (though this is true), but that it's a synthetic value generated by the driver rather than representing an actual HW instance ID. Artem.