From: Herbert Xu <herbert@gondor.apana.org.au>
To: Gary R Hook <gary.hook@amd.com>
Cc: linux-crypto@vger.kernel.org, thomas.lendacky@amd.com,
davem@davemloft.net
Subject: Re: [PATCH] crypto: ccp - Assign DMA commands to the channel's CCP
Date: Thu, 16 Mar 2017 17:53:10 +0800 [thread overview]
Message-ID: <20170316095310.GA12039@gondor.apana.org.au> (raw)
In-Reply-To: <20170310182818.21186.92711.stgit@taos>
On Fri, Mar 10, 2017 at 12:28:18PM -0600, Gary R Hook wrote:
> From: Gary R Hook <ghook@amd.com>
>
> The CCP driver generally uses a round-robin approach when
> assigning operations to available CCPs. For the DMA engine,
> however, the DMA mappings of the SGs are associated with a
> specific CCP. When an IOMMU is enabled, the IOMMU is
> programmed based on this specific device.
>
> If the DMA operations are not performed by that specific
> CCP then addressing errors and I/O page faults will occur.
>
> Update the CCP driver to allow a specific CCP device to be
> requested for an operation and use this in the DMA engine
> support.
>
> Cc: <stable@vger.kernel.org> # 4.9.x-
> Signed-off-by: Gary R Hook <gary.hook@amd.com>
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2017-03-16 9:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-10 18:28 [PATCH] crypto: ccp - Assign DMA commands to the channel's CCP Gary R Hook
2017-03-16 9:53 ` Herbert Xu [this message]
[not found] <20170310180341.21062.82465.stgit@taos>
2017-03-13 19:35 ` Gary R Hook
2017-03-14 7:17 ` Stephan Müller
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