From: Herbert Xu <herbert@gondor.apana.org.au>
To: Shijith Thotton <sthotton@marvell.com>
Cc: Arnaud Ebalard <arno@natisbad.org>,
Boris Brezillon <bbrezillon@kernel.org>,
Srujana Challa <schalla@marvell.com>,
linux-crypto@vger.kernel.org, jerinj@marvell.com,
sgoutham@marvell.com, "David S. Miller" <davem@davemloft.net>,
Dan Carpenter <dan.carpenter@oracle.com>,
Jiapeng Chong <jiapeng.chong@linux.alibaba.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] crypto: octeontx2: CN10K CPT to RNM workaround
Date: Sat, 5 Feb 2022 15:30:29 +1100 [thread overview]
Message-ID: <Yf39ZZmNWKFJgSpO@gondor.apana.org.au> (raw)
In-Reply-To: <ab2269cb3ef3049ed0ab73f28be29f6669a06e36.1643134480.git.sthotton@marvell.com>
On Tue, Jan 25, 2022 at 11:56:22PM +0530, Shijith Thotton wrote:
> From: Srujana Challa <schalla@marvell.com>
>
> When software sets CPT_AF_CTL[RNM_REQ_EN]=1 and RNM in not producing
> entropy(i.e., RNM_ENTROPY_STATUS[NORMAL_CNT] < 0x40), the first cycle of
> the response may be lost due to a conditional clocking issue. Due to
> this, the subsequent random number stream will be corrupted. So, this
> patch adds support to ensure RNM_ENTROPY_STATUS[NORMAL_CNT] = 0x40
> before writing CPT_AF_CTL[RNM_REQ_EN] = 1, as a workaround.
>
> Signed-off-by: Srujana Challa <schalla@marvell.com>
> Signed-off-by: Shijith Thotton <sthotton@marvell.com>
> ---
> .../marvell/octeontx2/otx2_cptpf_ucode.c | 43 ++++++++++++++++++-
> 1 file changed, 42 insertions(+), 1 deletion(-)
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
prev parent reply other threads:[~2022-02-05 4:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-25 18:26 Shijith Thotton
2022-01-25 18:26 ` [PATCH] crypto: octeontx2: disable DMA black hole on an DMA fault Shijith Thotton
2022-02-05 4:30 ` Herbert Xu
2022-01-25 18:26 ` [PATCH] crypto: octeontx2: increase CPT HW instruction queue length Shijith Thotton
2022-02-05 4:30 ` Herbert Xu
2022-02-05 4:30 ` Herbert Xu [this message]
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