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[175.34.62.5]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ba8ffe36a9dsm6671472a12.17.2025.11.07.21.10.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 07 Nov 2025 21:11:11 -0800 (PST) Message-ID: <74c37bd9-bf73-42ff-a9e9-dc55cc192c50@redhat.com> Date: Sat, 8 Nov 2025 15:10:57 +1000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 05/33] ACPI / PPTT: Add a helper to fill a cpumask from a cache_id To: Ben Horgan , james.morse@arm.com Cc: amitsinght@marvell.com, baisheng.gao@unisoc.com, baolin.wang@linux.alibaba.com, bobo.shaobowang@huawei.com, carl@os.amperecomputing.com, catalin.marinas@arm.com, dakr@kernel.org, dave.martin@arm.com, david@redhat.com, dfustini@baylibre.com, fenghuay@nvidia.com, gregkh@linuxfoundation.org, guohanjun@huawei.com, jeremy.linton@arm.com, jonathan.cameron@huawei.com, kobak@nvidia.com, lcherian@marvell.com, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, lpieralisi@kernel.org, peternewman@google.com, quic_jiles@quicinc.com, rafael@kernel.org, robh@kernel.org, rohit.mathew@arm.com, scott@os.amperecomputing.com, sdonthineni@nvidia.com, sudeep.holla@arm.com, tan.shaopeng@fujitsu.com, will@kernel.org, xhao@linux.alibaba.com References: <20251107123450.664001-1-ben.horgan@arm.com> <20251107123450.664001-6-ben.horgan@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20251107123450.664001-6-ben.horgan@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/7/25 10:34 PM, Ben Horgan wrote: > From: James Morse > > MPAM identifies CPUs by the cache_id in the PPTT cache structure. > > The driver needs to know which CPUs are associated with the cache. > The CPUs may not all be online, so cacheinfo does not have the > information. > > Add a helper to pull this information out of the PPTT. > > CC: Rohit Mathew > Signed-off-by: James Morse > Signed-off-by: Ben Horgan > --- > Changes since v3: > Equivalent changes to the previous patch: > Tags dropped due to rework > Fallout/simplification from adding acpi_pptt_cache_v1_full > Look for each cache type before incrementing level > --- > drivers/acpi/pptt.c | 62 ++++++++++++++++++++++++++++++++++++++++++++ > include/linux/acpi.h | 6 +++++ > 2 files changed, 68 insertions(+) > Reviewed-by: Gavin Shan