From: "joro@8bytes.org" <joro@8bytes.org>
To: "Sironi, Filippo" <sironi@amazon.de>
Cc: "Serebrin, Benjamin" <serebrin@amazon.com>,
"sebott@amazon.de" <sebott@amazon.de>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>
Subject: Re: [PATCH v2 0/3] iommu/amd: I/O VA address limits
Date: Wed, 22 Jul 2020 14:19:22 +0200 [thread overview]
Message-ID: <20200722121922.GY27672@8bytes.org> (raw)
In-Reply-To: <715c45b76f49b732e5f20157945d2ae262654602.camel@amazon.de>
On Fri, Jul 17, 2020 at 03:15:43PM +0000, Sironi, Filippo wrote:
> I don't believe that we want to trust a userspace driver here, this may
> result in hosts becoming unstable because devices are asked to do things
> they aren't meant to do (e.g., DMA beyond 48 bits).
How is the hosts stability affected when a device is programmed with
handles outside of its DMA mask?
Anyway, someone needs to know how to use the device in the end, and this
entity also needs to know the DMA mask of the device and pass it down to
path to the dma-iommu code.
Regards,
Joerg
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next prev parent reply other threads:[~2020-07-22 12:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-05 14:56 [PATCH 0/3] iommu/amd: I/O VA address limits Sebastian Ott via iommu
2020-06-05 14:56 ` [PATCH 1/3] iommu/amd: Parse supported address sizes from IVRS Sebastian Ott via iommu
2020-06-05 14:56 ` [PATCH 2/3] iommu/amd: Restrict aperture for domains to conform with IVRS Sebastian Ott via iommu
2020-06-05 14:56 ` [PATCH 3/3] iommu/amd: Actually enforce geometry aperture Sebastian Ott via iommu
2020-06-30 9:30 ` Joerg Roedel
2020-06-30 22:46 ` [PATCH v2 0/3] iommu/amd: I/O VA address limits Sebastian Ott via iommu
2020-06-30 22:46 ` [PATCH v2 1/3] iommu/amd: Parse supported address sizes from IVRS Sebastian Ott via iommu
2020-06-30 22:46 ` [PATCH v2 2/3] iommu/amd: Restrict aperture for domains to conform with IVRS Sebastian Ott via iommu
2020-06-30 22:46 ` [PATCH v2 3/3] iommu/amd: Actually enforce geometry aperture Sebastian Ott via iommu
2020-07-10 12:31 ` [PATCH v2 0/3] iommu/amd: I/O VA address limits Joerg Roedel
2020-07-17 9:20 ` Sebastian Ott via iommu
2020-07-17 9:47 ` Robin Murphy
2020-07-17 13:22 ` Sironi, Filippo via iommu
2020-07-17 14:36 ` Robin Murphy
2020-07-17 15:15 ` Sironi, Filippo via iommu
2020-07-22 12:19 ` joro [this message]
2020-07-22 12:34 ` Sironi, Filippo via iommu
2020-07-22 14:00 ` joro
2020-06-24 16:09 ` [PATCH " Sebastian Ott via iommu
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