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Message-ID: <ce55d297-ea61-470f-b979-69fcfa743f8e@linux.intel.com>
Date: Thu, 2 May 2024 10:06:12 +0800
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Cc: baolu.lu@linux.intel.com, Palmer Dabbelt <palmer@dabbelt.com>,
 Albert Ou <aou@eecs.berkeley.edu>, Anup Patel <apatel@ventanamicro.com>,
 Sunil V L <sunilvl@ventanamicro.com>, Nick Kossifidis <mick@ics.forth.gr>,
 Sebastien Boeuf <seb@rivosinc.com>, Rob Herring <robh+dt@kernel.org>,
 Krzysztof Kozlowski <krzk+dt@kernel.org>, Conor Dooley
 <conor+dt@kernel.org>, devicetree@vger.kernel.org, iommu@lists.linux.dev,
 linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
 linux@rivosinc.com
Subject: Re: [PATCH v3 5/7] iommu/riscv: Device directory management.
To: Tomasz Jeznach <tjeznach@rivosinc.com>, Joerg Roedel <joro@8bytes.org>,
 Will Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>,
 Paul Walmsley <paul.walmsley@sifive.com>
References: <cover.1714494653.git.tjeznach@rivosinc.com>
 <ce3b82a20db0b776685269674ce9b7a926d5680d.1714494653.git.tjeznach@rivosinc.com>
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From: Baolu Lu <baolu.lu@linux.intel.com>
In-Reply-To: <ce3b82a20db0b776685269674ce9b7a926d5680d.1714494653.git.tjeznach@rivosinc.com>
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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@ics.forth.gr>
> Signed-off-by: Nick Kossifidis<mick@ics.forth.gr>
> Signed-off-by: Tomasz Jeznach<tjeznach@rivosinc.com>

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

Best regards,
baolu