linux-kernel - [PATCH v2 0/3] arm64: dts: hi3798cv200: fix GICR size, add cache info, maintenance irq and GICH, GICV spaces

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Message-Id: <20240218-cache-v2-0-1fd919e2bd3e@outlook.com>
Date: Sun, 18 Feb 2024 20:02:49 +0800
From: Yang Xiwen via B4 Relay <devnull+forbidden405.outlook.com@...nel.org>
To: Wei Xu <xuwei5@...ilicon.com>, Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Jiancheng Xue <xuejiancheng@...ilicon.com>, Alex Elder <elder@...aro.org>, 
 Peter Griffin <peter.griffin@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Yang Xiwen <forbidden405@...look.com>
Subject: [PATCH v2 0/3] arm64: dts: hi3798cv200: fix GICR size, add cache
 info, maintenance irq and GICH, GICV spaces

They are tested on a hi3798mv200 board in fact. Though the 2 SoCs are
highly similar and the CPU should be the same. Still, Tested-by are
welcomed.

The patchset fixes some warnings reported by the kernel during boot.

The cache size info is from Processor_Datasheet_v2XX.pdf [1], Section
2.2.1 Master Processor.

The cache line size and the set-associative info are from Cortex-A53
Documentation [2]. Dts for other SoCs are also a good reference.

>From the doc, we know L1 i-cache is 4-way assoc, L1 d-cache is 2-way
assoc and L2 cache is 16-way assoc. Fill the dts props accordingly.

Also, to use KVM's VGIC code, we need to add GICH, GICV and maintenance
IRQ to the dts. They are added with verification.

Dear maintainers, maybe consider Cc to stable too?

[1]: https://github.com/96boards/documentation/blob/master/enterprise/poplar/hardware-docs/Processor_Datasheet_v2XX.pdf
[2]: https://developer.arm.com/documentation/ddi0500/j/Level-1-Memory-System

Signed-off-by: Yang Xiwen <forbidden405@...look.com>
---
Changes in v2:
- arm64: dts: hi3798cv200: add GICH, GICV register spces and
  maintainance IRQ.
- Link to v1: https://lore.kernel.org/r/20240218-cache-v1-0-2c0a8a4472e7@outlook.com

---
Yang Xiwen (3):
      arm64: dts: hi3798cv200: fix the size of GICR
      arm64: dts: hi3798cv200: add GICH, GICV register space and irq
      arm64: dts: hi3798cv200: add cache info

 arch/arm64/boot/dts/hisilicon/hi3798cv200.dtsi | 43 +++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)
---
base-commit: 8d3dea210042f54b952b481838c1e7dfc4ec751d
change-id: 20240218-cache-11c8bf7566c2

Best regards,
-- 
Yang Xiwen <forbidden405@...look.com>