From: Fenghua Yu <fenghuay@nvidia.com>
To: Ben Horgan <ben.horgan@arm.com>, 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, gregkh@linuxfoundation.org,
gshan@redhat.com, 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,
Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Subject: Re: [PATCH 10/33] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate
Date: Wed, 12 Nov 2025 18:46:28 -0800 [thread overview]
Message-ID: <02baf595-e428-436c-89e1-add97adbcd26@nvidia.com> (raw)
In-Reply-To: <20251107123450.664001-11-ben.horgan@arm.com>
On 11/7/25 04:34, Ben Horgan wrote:
> From: James Morse <james.morse@arm.com>
>
> Probing MPAM is convoluted. MSCs that are integrated with a CPU may
> only be accessible from those CPUs, and they may not be online.
> Touching the hardware early is pointless as MPAM can't be used until
> the system-wide common values for num_partid and num_pmg have been
> discovered.
>
> Start with driver probe/remove and mapping the MSC.
>
> CC: Carl Worth <carl@os.amperecomputing.com>
> Tested-by: Fenghua Yu <fenghuay@nvidia.com>
> Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
> Tested-by: Peter Newman <peternewman@google.com>
> Signed-off-by: James Morse <james.morse@arm.com>
> Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Thanks.
-Fenghua
next prev parent reply other threads:[~2025-11-13 2:46 UTC|newest]
Thread overview: 167+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-07 12:34 [PATCH 00/33] arm_mpam: Add basic mpam driver Ben Horgan
2025-11-07 12:34 ` [PATCH 01/33] ACPI / PPTT: Add a helper to fill a cpumask from a processor container Ben Horgan
2025-11-08 4:31 ` Gavin Shan
2025-11-12 10:14 ` Ben Horgan
2025-11-12 5:45 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 02/33] ACPI / PPTT: Stop acpi_count_levels() expecting callers to clear levels Ben Horgan
2025-11-11 7:34 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 03/33] ACPI / PPTT: Add acpi_pptt_cache_v1_full to use pptt cache as one structure Ben Horgan
2025-11-08 4:54 ` Gavin Shan
2025-11-10 15:51 ` Ben Horgan
2025-11-10 15:46 ` Jonathan Cameron
2025-11-10 16:28 ` Ben Horgan
2025-11-10 17:00 ` Jeremy Linton
2025-11-11 16:48 ` Ben Horgan
2025-11-12 20:22 ` Fenghua Yu
2025-11-07 12:34 ` [PATCH 04/33] ACPI / PPTT: Find cache level by cache-id Ben Horgan
2025-11-08 5:11 ` Gavin Shan
2025-11-10 16:02 ` Jonathan Cameron
2025-11-11 17:02 ` Ben Horgan
2025-11-12 20:23 ` Fenghua Yu
2025-11-07 12:34 ` [PATCH 05/33] ACPI / PPTT: Add a helper to fill a cpumask from a cache_id Ben Horgan
2025-11-08 5:10 ` Gavin Shan
2025-11-10 16:04 ` Jonathan Cameron
2025-11-12 20:26 ` Fenghua Yu
2025-11-07 12:34 ` [PATCH 06/33] arm64: kconfig: Add Kconfig entry for MPAM Ben Horgan
2025-11-07 12:34 ` [PATCH 07/33] platform: Define platform_device_put cleanup handler Ben Horgan
2025-11-10 1:03 ` Gavin Shan
2025-11-10 16:07 ` Jonathan Cameron
2025-11-12 20:32 ` Fenghua Yu
2025-11-07 12:34 ` [PATCH 08/33] ACPI: Define acpi_put_table cleanup handler and acpi_get_table_ret() helper Ben Horgan
2025-11-10 1:03 ` Gavin Shan
2025-11-10 16:11 ` Jonathan Cameron
2025-11-12 7:02 ` Shaopeng Tan (Fujitsu)
2025-11-12 20:39 ` Fenghua Yu
2025-11-07 12:34 ` [PATCH 09/33] ACPI / MPAM: Parse the MPAM table Ben Horgan
2025-11-08 8:54 ` Gavin Shan
2025-11-10 16:27 ` Jonathan Cameron
2025-11-12 14:45 ` Ben Horgan
2025-11-10 16:23 ` Jonathan Cameron
2025-11-12 7:01 ` Shaopeng Tan (Fujitsu)
2025-11-12 14:55 ` Ben Horgan
2025-11-13 2:16 ` Fenghua Yu
2025-11-13 12:09 ` Ben Horgan
2025-11-13 2:33 ` Fenghua Yu
2025-11-13 14:24 ` Ben Horgan
2025-11-07 12:34 ` [PATCH 10/33] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate Ben Horgan
2025-11-08 9:28 ` Gavin Shan
2025-11-10 16:44 ` Jonathan Cameron
2025-11-12 15:32 ` Ben Horgan
2025-11-10 16:58 ` Jonathan Cameron
2025-11-12 16:05 ` Ben Horgan
2025-11-12 7:22 ` Shaopeng Tan (Fujitsu)
2025-11-12 15:37 ` Ben Horgan
2025-11-13 2:46 ` Fenghua Yu [this message]
2025-11-07 12:34 ` [PATCH 11/33] arm_mpam: Add the class and component structures for firmware described ris Ben Horgan
2025-11-09 0:07 ` Gavin Shan
2025-11-12 16:39 ` Ben Horgan
2025-11-12 16:48 ` Ben Horgan
2025-11-10 17:10 ` Jonathan Cameron
2025-11-12 17:21 ` Ben Horgan
2025-11-12 7:29 ` Shaopeng Tan (Fujitsu)
2025-11-13 3:23 ` Fenghua Yu
2025-11-13 16:39 ` Ben Horgan
2025-11-07 12:34 ` [PATCH 12/33] arm_mpam: Add MPAM MSC register layout definitions Ben Horgan
2025-11-09 0:25 ` Gavin Shan
2025-11-07 12:34 ` [PATCH 13/33] arm_mpam: Add cpuhp callbacks to probe MSC hardware Ben Horgan
2025-11-07 12:34 ` [PATCH 14/33] arm_mpam: Probe hardware to find the supported partid/pmg values Ben Horgan
2025-11-09 0:43 ` Gavin Shan
2025-11-10 23:26 ` Gavin Shan
2025-11-11 9:30 ` Ben Horgan
2025-11-12 7:57 ` Shaopeng Tan (Fujitsu)
2025-11-13 3:50 ` Fenghua Yu
2025-11-13 16:43 ` Ben Horgan
2025-11-07 12:34 ` [PATCH 15/33] arm_mpam: Add helpers for managing the locking around the mon_sel registers Ben Horgan
2025-11-09 0:49 ` Gavin Shan
2025-11-12 8:03 ` Shaopeng Tan (Fujitsu)
2025-11-13 3:52 ` Fenghua Yu
2025-11-07 12:34 ` [PATCH 16/33] arm_mpam: Probe the hardware features resctrl supports Ben Horgan
2025-11-09 21:55 ` Gavin Shan
2025-11-12 8:17 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 17/33] arm_mpam: Merge supported features during mpam_enable() into mpam_class Ben Horgan
2025-11-09 21:59 ` Gavin Shan
2025-11-12 8:24 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 18/33] arm_mpam: Reset MSC controls from cpuhp callbacks Ben Horgan
2025-11-09 22:11 ` Gavin Shan
2025-11-07 12:34 ` [PATCH 19/33] arm_mpam: Add a helper to touch an MSC from any CPU Ben Horgan
2025-11-09 22:13 ` Gavin Shan
2025-11-14 2:47 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 20/33] arm_mpam: Extend reset logic to allow devices to be reset any time Ben Horgan
2025-11-09 22:16 ` Gavin Shan
2025-11-13 20:24 ` Fenghua Yu
2025-11-14 2:52 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 21/33] arm_mpam: Register and enable IRQs Ben Horgan
2025-11-09 22:18 ` Gavin Shan
2025-11-07 12:34 ` [PATCH 22/33] arm_mpam: Use a static key to indicate when mpam is enabled Ben Horgan
2025-11-09 22:20 ` Gavin Shan
2025-11-14 4:37 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 23/33] arm_mpam: Allow configuration to be applied and restored during cpu online Ben Horgan
2025-11-09 22:59 ` Gavin Shan
2025-11-13 17:14 ` Ben Horgan
2025-11-10 17:27 ` Jonathan Cameron
2025-11-11 17:45 ` Ben Horgan
2025-11-14 10:33 ` Ben Horgan
2025-11-14 14:34 ` Ben Horgan
2025-11-07 12:34 ` [PATCH 24/33] arm_mpam: Probe and reset the rest of the features Ben Horgan
2025-11-09 23:01 ` Gavin Shan
2025-11-14 7:04 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 25/33] arm_mpam: Add helpers to allocate monitors Ben Horgan
2025-11-09 23:02 ` Gavin Shan
2025-11-14 7:14 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 26/33] arm_mpam: Add mpam_msmon_read() to read monitor value Ben Horgan
2025-11-09 23:13 ` Gavin Shan
2025-11-14 10:07 ` Ben Horgan
2025-11-12 5:33 ` Shaopeng Tan (Fujitsu)
2025-11-07 12:34 ` [PATCH 27/33] arm_mpam: Track bandwidth counter state for power management Ben Horgan
2025-11-09 23:15 ` Gavin Shan
2025-11-10 13:49 ` Zeng Heng
2025-11-10 17:31 ` Jonathan Cameron
2025-11-07 12:34 ` [PATCH 28/33] arm_mpam: Consider overflow in bandwidth counter state Ben Horgan
2025-11-09 23:16 ` Gavin Shan
2025-11-10 13:50 ` Zeng Heng
2025-11-10 17:32 ` Jonathan Cameron
2025-11-07 12:34 ` [PATCH 29/33] arm_mpam: Probe for long/lwd mbwu counters Ben Horgan
2025-11-09 23:16 ` Gavin Shan
2025-11-07 12:34 ` [PATCH 30/33] arm_mpam: Use long MBWU counters if supported Ben Horgan
2025-11-09 23:17 ` Gavin Shan
2025-11-07 12:34 ` [PATCH 31/33] arm_mpam: Add helper to reset saved mbwu state Ben Horgan
2025-11-09 23:18 ` Gavin Shan
2025-11-10 17:34 ` Jonathan Cameron
2025-11-07 12:34 ` [PATCH 32/33] arm_mpam: Add kunit test for bitmap reset Ben Horgan
2025-11-09 23:19 ` Gavin Shan
2025-11-07 12:34 ` [PATCH 33/33] arm_mpam: Add kunit tests for props_mismatch() Ben Horgan
2025-11-09 23:19 ` Gavin Shan
2025-11-07 12:47 ` [PATCH 00/33] arm_mpam: Add basic mpam driver Ben Horgan
2025-11-07 21:22 ` Fenghua Yu
2025-11-07 23:22 ` Carl Worth
2025-11-10 16:15 ` Ben Horgan
2025-11-11 0:45 ` Carl Worth
2025-11-10 1:05 ` Gavin Shan
2025-11-10 13:56 ` Zeng Heng
2025-11-10 16:03 ` Ben Horgan
2025-11-11 7:09 ` Shaopeng Tan (Fujitsu)
2025-11-16 17:16 ` Drew Fustini
2025-11-18 14:11 ` Ben Horgan
2025-11-18 22:55 ` Drew Fustini
2025-11-19 10:00 ` Jonathan Cameron
2025-11-19 20:09 ` Drew Fustini
-- strict thread matches above, loose matches on Subject: below --
2025-08-22 15:29 James Morse
2025-08-22 15:29 ` [PATCH 10/33] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate James Morse
2025-08-22 19:15 ` Markus Elfring
2025-08-22 19:55 ` Markus Elfring
2025-08-23 6:41 ` Greg Kroah-Hartman
2025-08-27 13:03 ` Ben Horgan
2025-09-05 18:48 ` James Morse
2025-09-08 10:54 ` Ben Horgan
2025-08-27 15:39 ` Rob Herring
2025-08-27 16:16 ` Rob Herring
2025-09-05 18:52 ` James Morse
2025-09-05 18:52 ` James Morse
2025-09-01 9:11 ` Ben Horgan
2025-09-05 18:49 ` James Morse
2025-09-01 11:21 ` Dave Martin
2025-09-05 18:49 ` James Morse
2025-09-08 15:25 ` Dave Martin
2025-09-10 19:19 ` James Morse
2025-08-22 15:30 ` James Morse
2025-09-09 7:03 ` Shaopeng Tan (Fujitsu)
2025-09-10 19:31 ` James Morse
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