From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Rajat Jain <rajatja@google.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
linux-pci@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Bjorn Helgaas <helgaas@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Rajat Jain <rajatxjain@gmail.com>,
Dmitry Torokhov <dtor@google.com>,
Jesse Barnes <jsbarnes@google.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Pavel Machek <pavel@denx.de>,
Oliver O'Halloran <oohall@gmail.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
David Woodhouse <dwmw2@infradead.org>,
Lu Baolu <baolu.lu@linux.intel.com>,
iommu@lists.linux-foundation.org
Subject: Re: [PATCH v4 2/2] PCI: ACPI: Support Microsoft's "DmaProperty"
Date: Mon, 21 Mar 2022 12:48:48 +0200 [thread overview]
Message-ID: <YjhYEN/ajM71wMn0@lahna> (raw)
In-Reply-To: <20220320062907.3272903-2-rajatja@google.com>
On Sat, Mar 19, 2022 at 11:29:06PM -0700, Rajat Jain wrote:
> The "DmaProperty" is supported and documented by Microsoft here:
> https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports
> They use this property for DMA protection:
> https://docs.microsoft.com/en-us/windows/security/information-protection/kernel-dma-protection-for-thunderbolt
>
> Support the "DmaProperty" with the same semantics. This is useful for
> internal PCI devices that do not hang off a PCIe rootport, but offer
> an attack surface for DMA attacks (e.g. internal network devices).
>
> Signed-off-by: Rajat Jain <rajatja@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
next prev parent reply other threads:[~2022-03-21 10:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-20 6:29 [PATCH v4 1/2] PCI: Rename "pci_dev->untrusted" to "pci_dev->poses_dma_risk" Rajat Jain
2022-03-20 6:29 ` [PATCH v4 2/2] PCI: ACPI: Support Microsoft's "DmaProperty" Rajat Jain
2022-03-21 10:48 ` Mika Westerberg [this message]
2022-03-21 10:45 ` [PATCH v4 1/2] PCI: Rename "pci_dev->untrusted" to "pci_dev->poses_dma_risk" Mika Westerberg
2022-03-22 9:02 ` Christoph Hellwig
2022-03-22 11:11 ` Rafael J. Wysocki
2022-03-22 20:09 ` Rajat Jain
2022-03-23 6:16 ` Mika Westerberg
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