From: Jan Kiszka <jan.kiszka@siemens.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Nishanth Menon <nm@ti.com>,
Santosh Shilimkar <ssantosh@kernel.org>,
Vignesh Raghavendra <vigneshr@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
"Siddharth Vadapalli" <s-vadapalli@ti.com>,
"Bao Cheng Su" <baocheng.su@siemens.com>,
"Hua Qian Li" <huaqian.li@siemens.com>,
"Diogo Ivo" <diogo.ivo@siemens.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Krzysztof Wilczyński" <kw@linux.com>,
linux-pci@vger.kernel.org,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>
Subject: Re: [PATCH 0/5] soc: ti: Add and use PVU on K3-AM65 for DMA isolation
Date: Mon, 26 Aug 2024 21:25:23 +0200 [thread overview]
Message-ID: <3dcaee19-3671-4658-a2e7-247e42b85805@siemens.com> (raw)
In-Reply-To: <93da058b-8d72-4f76-9ee7-f6837a1a4a9a@linaro.org>
On 26.08.24 20:53, Krzysztof Kozlowski wrote:
> On 26/08/2024 19:56, Jan Kiszka wrote:
>> Only few of the K3 SoCs have an IOMMU and, thus, can isolate the system
>> against DMA-based attacks of external PCI devices. The AM65 is without
>> an IOMMU, but it comes with something close to it: the Peripheral
>> Virtualization Unit (PVU).
>>
>> The PVU was originally designed to establish static compartments via a
>> hypervisor, isolate those DMA-wise against each other and the host and
>> even allow remapping of guest-physical addresses. But it only provides
>> a static translation region, not page-granular mappings. Thus, it cannot
>> be handled transparently like an IOMMU.
>
> You keep developing on some old kernel. I noticed it on few patchsets
> last days. Please work on mainline.
>
How did you come to this conclusion? This patch set was written for
mainline, just rebased and tested again over next-20240826 before
sending today.
Jan
--
Siemens AG, Technology
Linux Expert Center
next prev parent reply other threads:[~2024-08-26 19:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-26 17:56 Jan Kiszka
2024-08-26 17:56 ` [PATCH 1/5] dt-bindings: soc: ti: Add AM65 peripheral virtualization unit Jan Kiszka
2024-08-26 19:20 ` Rob Herring (Arm)
2024-08-26 17:56 ` [PATCH 2/5] soc: ti: Add IOMPU-like PVU driver Jan Kiszka
2024-08-26 18:45 ` Krzysztof Kozlowski
2024-08-26 17:56 ` [PATCH 3/5] arm64: dts: ti: k3-am65-main: Add VMAP registers to PCI root complexes Jan Kiszka
2024-08-26 17:56 ` [PATCH 4/5] PCI: keystone: Add supported for PVU-based DMA isolation on AM654 Jan Kiszka
2024-08-26 17:56 ` [PATCH 5/5] arm64: dts: ti: iot2050: Enforce DMA isolation for devices behind PCI RC Jan Kiszka
2024-08-26 18:53 ` [PATCH 0/5] soc: ti: Add and use PVU on K3-AM65 for DMA isolation Krzysztof Kozlowski
2024-08-26 19:25 ` Jan Kiszka [this message]
2024-08-27 6:35 ` Krzysztof Kozlowski
2024-08-27 9:22 ` Jan Kiszka
2024-08-27 12:44 ` Krzysztof Kozlowski
2024-08-27 13:38 ` Jan Kiszka
2024-08-27 13:43 ` Krzysztof Kozlowski
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