From: Christoph Hellwig <hch@infradead.org>
To: Baolu Lu <baolu.lu@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>,
David Woodhouse <dwmw2@infradead.org>,
iommu@lists.linux.dev
Subject: Re: lack of permission checking with intel-iommu?
Date: Tue, 2 Jul 2024 01:25:09 -0700 [thread overview]
Message-ID: <ZoO5ZeYtA6qLIs21@infradead.org> (raw)
In-Reply-To: <4d84afa1-e2ce-4e1b-8fe3-1d3fb0db2ba0@linux.intel.com>
On Tue, Jul 02, 2024 at 04:22:25PM +0800, Baolu Lu wrote:
> Is it about IOMMU blocking "device reading from buffer" or "device
> writing to buffer"?
>
> The intel iommu driver might use first-stage translation for kernel DMA.
> It seems not to block the "device reading from buffer" if I remember it
> correctly.
This is about device reading from buffer it is only supposed to write
to (but doesn't).
next prev parent reply other threads:[~2024-07-02 8:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-02 7:46 lack of permission checking with intel-iommu? Christoph Hellwig
2024-07-02 8:02 ` Christoph Hellwig
2024-07-02 8:22 ` Baolu Lu
2024-07-02 8:25 ` Christoph Hellwig [this message]
2024-07-02 9:12 ` Baolu Lu
2024-07-02 11:42 ` Christoph Hellwig
2024-07-03 0:56 ` Tian, Kevin
2024-07-03 2:28 ` Baolu Lu
2024-07-02 8:47 ` Yi Liu
2024-07-02 9:07 ` Baolu Lu
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