linux-kernel - Re: [PATCH v3 5/7] iommu/riscv: Device directory management.

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Date: Thu, 2 May 2024 10:06:12 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Tomasz Jeznach <tjeznach@...osinc.com>, Joerg Roedel <joro@...tes.org>,
 Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
 Paul Walmsley <paul.walmsley@...ive.com>
Cc: baolu.lu@...ux.intel.com, Palmer Dabbelt <palmer@...belt.com>,
 Albert Ou <aou@...s.berkeley.edu>, Anup Patel <apatel@...tanamicro.com>,
 Sunil V L <sunilvl@...tanamicro.com>, Nick Kossifidis <mick@....forth.gr>,
 Sebastien Boeuf <seb@...osinc.com>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, devicetree@...r.kernel.org, iommu@...ts.linux.dev,
 linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux@...osinc.com
Subject: Re: [PATCH v3 5/7] iommu/riscv: Device directory management.

On 5/1/24 4:01 AM, Tomasz Jeznach wrote:
> Introduce device context allocation and device directory tree
> management including capabilities discovery sequence, as described
> in Chapter 2.1 of the RISC-V IOMMU Architecture Specification.
> 
> Device directory mode will be auto detected using DDTP WARL property,
> using highest mode supported by the driver and hardware. If none
> supported can be configured, driver will fall back to global pass-through.
> 
> First level DDTP page can be located in I/O (detected using DDTP WARL)
> and system memory.
> 
> Only simple identity and release (blocking) protection domains are
> supported by this implementation.
> 
> Co-developed-by: Nick Kossifidis<mick@....forth.gr>
> Signed-off-by: Nick Kossifidis<mick@....forth.gr>
> Signed-off-by: Tomasz Jeznach<tjeznach@...osinc.com>

Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>

Best regards,
baolu