From: s-vadapalli <s-vadapalli@ti.com>
To: <huaqian.li@siemens.com>
Cc: <s-vadapalli@ti.com>, <baocheng.su@siemens.com>,
<bhelgaas@google.com>, <conor+dt@kernel.org>,
<devicetree@vger.kernel.org>, <diogo.ivo@siemens.com>,
<helgaas@kernel.org>, <jan.kiszka@siemens.com>,
<kristo@kernel.org>, <krzk+dt@kernel.org>, <kw@linux.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-pci@vger.kernel.org>,
<lpieralisi@kernel.org>, <nm@ti.com>, <robh@kernel.org>,
<ssantosh@kernel.org>, <vigneshr@ti.com>
Subject: Re: [PATCH v10 4/7] PCI: keystone: Add support for PVU-based DMA isolation on AM654
Date: Mon, 21 Jul 2025 12:51:06 +0530 [thread overview]
Message-ID: <7eb6b36c-da94-4363-9ee2-d3d38ec46a22@ti.com> (raw)
In-Reply-To: <20250721025945.204422-5-huaqian.li@siemens.com>
On Mon, Jul 21, 2025 at 10:59:42AM +0800, huaqian.li@siemens.com wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
>
> The AM654 lacks an IOMMU, thus does not support isolating DMA requests
> from untrusted PCI devices to selected memory regions this way. Use
> static PVU-based protection instead. The PVU, when enabled, will only
> accept DMA requests that address previously configured regions.
>
> Use the availability of a restricted-dma-pool memory region as trigger
> and register it as valid DMA target with the PVU. In addition, enable
> the mapping of requester IDs to VirtIDs in the PCI RC. Use only a single
> VirtID so far, catching all devices.
>
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> Signed-off-by: Li Hua Qian <huaqian.li@siemens.com>
Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Regards,
Siddharth.
next prev parent reply other threads:[~2025-07-21 7:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-21 2:59 [PATCH v10 0/7] soc: ti: Add and use PVU on K3-AM65 for DMA isolation huaqian.li
2025-07-21 2:59 ` [PATCH v10 1/7] dt-bindings: soc: ti: Add AM65 peripheral virtualization unit huaqian.li
2025-07-21 2:59 ` [PATCH v10 2/7] dt-bindings: PCI: ti,am65: Extend for use with PVU huaqian.li
2025-07-21 2:59 ` [PATCH v10 3/7] soc: ti: Add IOMMU-like PVU driver huaqian.li
2025-07-21 2:59 ` [PATCH v10 4/7] PCI: keystone: Add support for PVU-based DMA isolation on AM654 huaqian.li
2025-07-21 7:21 ` s-vadapalli [this message]
2025-07-22 18:01 ` Christophe JAILLET
2025-07-21 2:59 ` [PATCH v10 5/7] arm64: dts: ti: k3-am65-main: Add PVU nodes huaqian.li
2025-07-21 2:59 ` [PATCH v10 6/7] arm64: dts: ti: k3-am65-main: Add VMAP registers to PCI root complexes huaqian.li
2025-07-21 2:59 ` [PATCH v10 7/7] arm64: dts: ti: iot2050: Add overlay for DMA isolation for devices behind PCI RC huaqian.li
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