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Wysocki" , Len Brown , Tomasz Jeznach , Joerg Roedel , Will Deacon , Robin Murphy , Anup Patel , Atish Patra Subject: Re: [PATCH v3 3/3] iommu/riscv: Add ACPI support Message-ID: <20250630-43f937dcdcd84599d28169cd@orel> References: <20250630034803.1611262-1-sunilvl@ventanamicro.com> <20250630034803.1611262-4-sunilvl@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250630034803.1611262-4-sunilvl@ventanamicro.com> On Mon, Jun 30, 2025 at 09:18:03AM +0530, Sunil V L wrote: > RISC-V IO Mapping Table (RIMT) provides the information about the IOMMU > to the OS in ACPI. Add support for ACPI in RISC-V IOMMU drivers by using > RIMT data. > > The changes at high level are, > > a) Register the IOMMU with RIMT data structures. > b) Enable probing of platform IOMMU in ACPI way using the ACPIID defined > for the RISC-V IOMMU in the BRS spec [1]. Configure the MSI domain if > the platform IOMMU uses MSIs. > > [1] - https://github.com/riscv-non-isa/riscv-brs/blob/main/acpi-id.adoc > > Signed-off-by: Sunil V L > --- > drivers/iommu/riscv/iommu-platform.c | 17 ++++++++++++++++- > drivers/iommu/riscv/iommu.c | 10 ++++++++++ > 2 files changed, 26 insertions(+), 1 deletion(-) > Reviewed-by: Andrew Jones