From: Florian Fainelli <f.fainelli@gmail.com>
To: Claire Chang <tientzu@chromium.org>,
robh+dt@kernel.org, mpe@ellerman.id.au, benh@kernel.crashing.org,
paulus@samba.org, joro@8bytes.org, will@kernel.org,
frowand.list@gmail.com, konrad.wilk@oracle.com,
boris.ostrovsky@oracle.com, jgross@suse.com,
sstabellini@kernel.org, hch@lst.de, m.szyprowski@samsung.com,
robin.murphy@arm.com
Cc: drinkcat@chromium.org, devicetree@vger.kernel.org,
heikki.krogerus@linux.intel.com, saravanak@google.com,
peterz@infradead.org, xypron.glpk@gmx.de,
rafael.j.wysocki@intel.com, linux-kernel@vger.kernel.org,
andriy.shevchenko@linux.intel.com, bgolaszewski@baylibre.com,
iommu@lists.linux-foundation.org, grant.likely@arm.com,
rdunlap@infradead.org, gregkh@linuxfoundation.org,
xen-devel@lists.xenproject.org, dan.j.williams@intel.com,
treding@nvidia.com, linuxppc-dev@lists.ozlabs.org,
mingo@kernel.org
Subject: Re: [RFC PATCH v3 3/6] swiotlb: Use restricted DMA pool if available
Date: Tue, 12 Jan 2021 15:39:23 -0800 [thread overview]
Message-ID: <7b9b598c-5ccd-f897-a962-14c0ed7af6de@gmail.com> (raw)
In-Reply-To: <20210106034124.30560-4-tientzu@chromium.org>
On 1/5/21 7:41 PM, Claire Chang wrote:
> Regardless of swiotlb setting, the restricted DMA pool is preferred if
> available.
>
> The restricted DMA pools provide a basic level of protection against
> the DMA overwriting buffer contents at unexpected times. However, to
> protect against general data leakage and system memory corruption, the
> system needs to provide a way to restrict the DMA to a predefined memory
> region.
>
> Signed-off-by: Claire Chang <tientzu@chromium.org>
You could probably split this patch into two:
- one that introduces the get_io_tlb_mem() getter, updates all callers
of is_swiotlb_buffer() to gain a 'struct device' argument
- another one that does add support for a non-default swiotlb pool and
adds dev->dma_io_tlb_mem
Other than that, LGTM!
--
Florian
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next prev parent reply other threads:[~2021-01-12 23:39 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-06 3:41 [RFC PATCH v3 0/6] Restricted DMA Claire Chang
2021-01-06 3:41 ` [RFC PATCH v3 1/6] swiotlb: Add io_tlb_mem struct Claire Chang
2021-01-13 11:50 ` Christoph Hellwig
2021-01-06 3:41 ` [RFC PATCH v3 2/6] swiotlb: Add restricted DMA pool Claire Chang
2021-01-06 7:50 ` Greg KH
2021-01-13 11:51 ` Christoph Hellwig
2021-01-13 12:29 ` Greg KH
2021-01-13 12:37 ` Christoph Hellwig
2021-01-06 18:52 ` Konrad Rzeszutek Wilk
2021-01-07 17:39 ` Claire Chang
2021-01-07 17:57 ` Konrad Rzeszutek Wilk
2021-01-07 18:09 ` Florian Fainelli
2021-01-07 21:19 ` Konrad Rzeszutek Wilk
2021-01-12 23:52 ` Florian Fainelli
2021-01-25 5:26 ` Jon Masters
2021-01-13 1:53 ` Robin Murphy
2021-01-13 0:03 ` Florian Fainelli
2021-01-13 13:59 ` Nicolas Saenz Julienne
2021-01-13 15:27 ` Robin Murphy
2021-01-13 17:43 ` Florian Fainelli
2021-01-13 18:03 ` Robin Murphy
2021-01-13 12:42 ` Christoph Hellwig
2021-01-14 9:06 ` Claire Chang
2021-01-06 3:41 ` [RFC PATCH v3 3/6] swiotlb: Use restricted DMA pool if available Claire Chang
2021-01-12 23:39 ` Florian Fainelli [this message]
2021-01-13 12:44 ` Christoph Hellwig
2021-01-06 3:41 ` [RFC PATCH v3 4/6] swiotlb: Add restricted DMA alloc/free support Claire Chang
2021-01-12 23:41 ` Florian Fainelli
2021-01-13 12:48 ` Christoph Hellwig
2021-01-13 18:27 ` Robin Murphy
2021-01-13 18:32 ` Christoph Hellwig
2021-01-06 3:41 ` [RFC PATCH v3 5/6] dt-bindings: of: Add restricted DMA pool Claire Chang
2021-01-06 18:57 ` Konrad Rzeszutek Wilk
2021-01-07 17:39 ` Claire Chang
2021-01-07 18:00 ` Konrad Rzeszutek Wilk
2021-01-07 18:14 ` Florian Fainelli
2021-01-12 7:47 ` Claire Chang
2021-01-20 16:53 ` Rob Herring
2021-01-20 17:30 ` Robin Murphy
2021-01-20 21:31 ` Rob Herring
2021-01-21 1:09 ` Robin Murphy
2021-01-21 15:48 ` Rob Herring
2021-01-21 17:29 ` Robin Murphy
2021-01-06 3:41 ` [RFC PATCH v3 6/6] of: Add plumbing for " Claire Chang
2021-01-12 23:48 ` Florian Fainelli
2021-01-14 9:08 ` Claire Chang
2021-01-14 18:52 ` Florian Fainelli
2021-01-15 3:46 ` Claire Chang
2021-01-06 18:48 ` [RFC PATCH v3 0/6] Restricted DMA Florian Fainelli
2021-01-07 17:38 ` Claire Chang
2021-01-07 17:42 ` Claire Chang
2021-01-07 17:59 ` Florian Fainelli
2021-01-12 7:48 ` Claire Chang
2021-01-12 18:01 ` Florian Fainelli
2021-01-13 2:29 ` Tomasz Figa
2021-01-13 3:56 ` Florian Fainelli
2021-01-13 4:25 ` Tomasz Figa
2021-01-13 4:41 ` Florian Fainelli
2021-02-09 6:27 ` Claire Chang
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