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[175.34.8.244]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c74487b5b8csm9108581a12.31.2026.03.23.20.41.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2026 20:41:46 -0700 (PDT) Message-ID: <1ab278d0-59b4-4fcf-b72f-ddcdb4fc96b4@redhat.com> Date: Tue, 24 Mar 2026 13:41:32 +1000 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 30/40] arm_mpam: resctrl: Add resctrl_arch_rmid_read() To: Ben Horgan Cc: amitsinght@marvell.com, baisheng.gao@unisoc.com, baolin.wang@linux.alibaba.com, carl@os.amperecomputing.com, dave.martin@arm.com, david@kernel.org, dfustini@baylibre.com, fenghuay@nvidia.com, james.morse@arm.com, jonathan.cameron@huawei.com, kobak@nvidia.com, lcherian@marvell.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, peternewman@google.com, punit.agrawal@oss.qualcomm.com, quic_jiles@quicinc.com, reinette.chatre@intel.com, rohit.mathew@arm.com, scott@os.amperecomputing.com, sdonthineni@nvidia.com, tan.shaopeng@fujitsu.com, xhao@linux.alibaba.com, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net, maz@kernel.org, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, kvmarm@lists.linux.dev, zengheng4@huawei.com, linux-doc@vger.kernel.org, Shaopeng Tan References: <20260313144617.3420416-1-ben.horgan@arm.com> <20260313144617.3420416-31-ben.horgan@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20260313144617.3420416-31-ben.horgan@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/14/26 12:46 AM, Ben Horgan wrote: > From: James Morse > > resctrl uses resctrl_arch_rmid_read() to read counters. CDP emulation means > the counter may need reading in three different ways. > > The helpers behind the resctrl_arch_ functions will be re-used for the ABMC > equivalent functions. > > Add the rounding helper for checking monitor values while we're here. > > Tested-by: Gavin Shan > Tested-by: Shaopeng Tan > Tested-by: Peter Newman > Tested-by: Zeng Heng > Reviewed-by: Shaopeng Tan > Reviewed-by: Jonathan Cameron > Signed-off-by: James Morse > Signed-off-by: Ben Horgan > --- > Changes since rfc: > cfg initialisation style > code flow at end of read_mon_cdp_safe() > > Changes since v2: > Whitespace changes > > Changes since v3: > Update function signatures > Remove abmc check > > Changes since v5: > don't read mbwu > remove reset code as only needed for mbwu > --- > drivers/resctrl/mpam_resctrl.c | 82 ++++++++++++++++++++++++++++++++++ > include/linux/arm_mpam.h | 5 +++ > 2 files changed, 87 insertions(+) > Reviewed-by: Gavin Shan