linux-kernel - Re: [PATCH v5 2/2] crypto: stm32 - Support for STM32 CRYP crypto module

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Date:   Tue, 28 Nov 2017 09:47:54 +0000
From:   Fabien DESSENNE <fabien.dessenne@...com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
CC:     Corentin Labbe <clabbe.montjoie@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Lionel DEBIEVE <lionel.debieve@...com>,
        Benjamin GAIGNARD <benjamin.gaignard@...com>,
        Ludovic BARRE <ludovic.barre@...com>
Subject: Re: [PATCH v5 2/2] crypto: stm32 - Support for STM32 CRYP crypto
 module

Just a gentle ping ... or have I missed out on a reply?


On 13/11/17 11:30, Fabien DESSENNE wrote:
> Hi Herbert,
>
> Can you check if this patchset (removed the AEAD part as you suggested +
> libkcapi test OK as suggested by Corentin) can be applied now?
>
> BR
>
> Fabien
>
>
> On 07/11/17 15:40, Fabien DESSENNE wrote:
>> On 22/10/17 09:26, Corentin Labbe wrote:
>>> On Thu, Oct 19, 2017 at 05:10:30PM +0200, Fabien Dessenne wrote:
>>>> This module registers block cipher algorithms that make use of the
>>>> STMicroelectronics STM32 crypto "CRYP1" hardware.
>>>> The following algorithms are supported:
>>>> - aes: ecb, cbc, ctr
>>>> - des: ecb, cbc
>>>> - tdes: ecb, cbc
>>>>
>>>> Signed-off-by: Fabien Dessenne <fabien.dessenne@...com>
>>>> ---
>>>>     drivers/crypto/stm32/Kconfig      |    9 +
>>>>     drivers/crypto/stm32/Makefile     |    3 +-
>>>>     drivers/crypto/stm32/stm32-cryp.c | 1172 +++++++++++++++++++++++++++++++++++++
>>>>     3 files changed, 1183 insertions(+), 1 deletion(-)
>>>>     create mode 100644 drivers/crypto/stm32/stm32-cryp.c
>>>>
>>>> diff --git a/drivers/crypto/stm32/Kconfig b/drivers/crypto/stm32/Kconfig
>>>> +static void stm32_cryp_irq_write_block(struct stm32_cryp *cryp)
>>>> +{
>>>> +	unsigned int i, j;
>>>> +	u32 *src;
>>>> +	u8 d8[4];
>>>> +
>>>> +	src = sg_virt(cryp->in_sg) + _walked_in;
>>>> +
>>>> +	for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++) {
>>>> +		if (likely(cryp->total_in >= sizeof(u32))) {
>>>> +			/* Write a full u32 */
>>>> +			stm32_cryp_write(cryp, CRYP_DIN, *src);
>>> Hello
>>>
>>> Try also to test your driver with userspace via AF_ALG (libkcapi is a good start).
>>> It should probably crash here.
>>> I have do the same on my first sunxi-ss driver and you should use kmap().
>>>
>>> Regards
>> Hi Corentin,
>>
>> Thank you for suggesting to test from userspace through the AF_ALG
>> socket with libkcapi.
>> This increases my test coverage.
>>
>> I ran the miscellaneous tests (kcapi-enc-test(large).sh + test.sh) and
>> could not observe any crash.
>> Note that I had already fixed some 'memory crashes' while testing with
>> testmgr / tcrypt while testing from the kernel.
>>
>> So it looks like the proposed implementation is fine.
>>
>> BR
>>
>> Fabien