linux-kernel - [PATCH v9 0/4] MIPS: Support I6500 multi-cluster configuration

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Message-Id: <20250129123250.711910-1-arikalo@gmail.com>
Date: Wed, 29 Jan 2025 13:32:46 +0100
From: Aleksandar Rikalo <arikalo@...il.com>
To: linux-mips@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Gregory CLEMENT <gregory.clement@...tlin.com>,
	Serge Semin <fancer.lancer@...il.com>,
	Jiaxun Yang <jiaxun.yang@...goat.com>,
	Paul Burton <paulburton@...nel.org>,
	Aleksandar Rikalo <arikalo@...il.com>,
	Chao-ying Fu <cfu@...s.com>,
	Djordje Todorovic <djordje.todorovic@...cgroup.com>
Subject: [PATCH v9 0/4] MIPS: Support I6500 multi-cluster configuration

Taken from Paul Burton MIPS repo with minor changes from Chao-ying Fu.
Tested with 64r6el_defconfig on Boston board in 2 cluster/2 VPU and
1 cluster/4 VPU configurations.

v9:
 - The changes related to the broken HCI have been removed as they are now part of a different series:
   https://lore.kernel.org/linux-mips/20250123-cluster-hci-broken-v3-0-8a7ec57cbf68@bootlin.com/
 - Re-base onto the master branch, with no functionality impact.

v8:
 - irqchip: mips-gic: Handle case with cluster without CPU cores.
 - Add Tested-by: Gregory CLEMENT <gregory.clement@...tlin.com> for the entire series.
 - Re-base onto the master branch, with no functionality impact.

v7:
 - Add fixes for specific CM3.5 which is used in EyeQ6H SoCs,
   suggested by Gregory Clement.
 - Re-base onto the master branch, with no functionality impact.

v6:
 - Re-base onto the master branch, with no functionality impact.
 - Correct the issue reported by the kernel test robot.

v5:
 - Drop FDC related changes (patches 12, 13, and 14).
 - Apply changes suggested by Thomas Gleixner (patches 3 and 4).
 - Add #include <linux/cpumask.h> to patch 1, suggested by Thomas Bogendoerfer.
 - Add Reviewed-by: Philippe Mathieu-Daudé <philmd@...aro.org> for the patch 08/11.
 - Add Tested-by: Serge Semin <fancer.lancer@...il.com> for the entire series.
 - Correct some commit messages.

v4:
 - Re-base onto the master branch, with no functionality impact.
 - Refactor MIPS FDC driver in the context of multicluster support.

v3:
 - Add Reviewed-by: Jiaxun Yang <jiaxun.yang@...goat.com> for the patch 02/12.
 - Add the changes requested by Marc Zyngier for the 3/12 patch.
 - Remove the patch 11/12 (a consequence of a discussion between Jiaxun Yang
   and Marc Zyngier.
 - Re-base onto the master branch, with no functionality impact.

v2:
 - Apply correct Signed-off-by to avoid confusion.

Paul Burton (4):
  clocksource: mips-gic-timer: Enable counter when CPUs start
  MIPS: pm-cps: Use per-CPU variables as per-CPU, not per-core
  MIPS: CPS: Introduce struct cluster_boot_config
  MIPS: CPS: Boot CPUs in secondary clusters

 arch/mips/include/asm/mips-cm.h      |  18 ++
 arch/mips/include/asm/smp-cps.h      |   7 +-
 arch/mips/kernel/asm-offsets.c       |   3 +
 arch/mips/kernel/cps-vec.S           |  19 +-
 arch/mips/kernel/mips-cm.c           |   4 +-
 arch/mips/kernel/pm-cps.c            |  35 ++--
 arch/mips/kernel/smp-cps.c           | 285 ++++++++++++++++++++++-----
 drivers/clocksource/mips-gic-timer.c |   6 +-
 8 files changed, 307 insertions(+), 70 deletions(-)

-- 
2.25.1