From: Will Deacon <will@kernel.org>
To: Sunil V L <sunilvl@ventanamicro.com>
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-acpi@vger.kernel.org, iommu@lists.linux.dev,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alexandre Ghiti <alex@ghiti.fr>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
Tomasz Jeznach <tjeznach@rivosinc.com>,
Joerg Roedel <joro@8bytes.org>,
Robin Murphy <robin.murphy@arm.com>,
Atish Kumar Patra <atishp@rivosinc.com>,
Anup Patel <apatel@ventanamicro.com>,
Andrew Jones <ajones@ventanamicro.com>
Subject: Re: [PATCH v4 3/3] iommu/riscv: Add ACPI support
Date: Sun, 13 Jul 2025 14:34:31 +0100 [thread overview]
Message-ID: <aHO158RO9fD6mXVh@willie-the-truck> (raw)
In-Reply-To: <20250710085657.2844330-4-sunilvl@ventanamicro.com>
On Thu, Jul 10, 2025 at 02:26:57PM +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 <sunilvl@ventanamicro.com>
> Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
> ---
> drivers/iommu/riscv/iommu-platform.c | 17 ++++++++++++++++-
> drivers/iommu/riscv/iommu.c | 10 ++++++++++
> 2 files changed, 26 insertions(+), 1 deletion(-)
Sorry, I missed there was a v4 of this. I'm not sure how you plan to
merge the series, but from the IOMMU side:
Acked-by: Will Deacon <will@kernel.org>
Will
prev parent reply other threads:[~2025-07-13 13:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-10 8:56 [PATCH v4 0/3] RISC-V: Add ACPI support for IOMMU Sunil V L
2025-07-10 8:56 ` [PATCH v4 1/3] ACPI: RISC-V: Add support for RIMT Sunil V L
2025-07-16 4:19 ` Anup Patel
2025-07-10 8:56 ` [PATCH v4 2/3] ACPI: scan: Add support for RISC-V in acpi_iommu_configure_id() Sunil V L
2025-07-10 8:56 ` [PATCH v4 3/3] iommu/riscv: Add ACPI support Sunil V L
2025-07-13 13:34 ` Will Deacon [this message]
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