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Message-ID: <77861ac9-2996-4a8f-f0d1-84950e1c6af9@linux.alibaba.com>
Date: Fri, 31 Dec 2021 19:00:55 +0800
From: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To: liulongfang <liulongfang@...wei.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Vitaly Chikunov <vt@...linux.org>,
Eric Biggers <ebiggers@...gle.com>,
Eric Biggers <ebiggers@...nel.org>,
Gilad Ben-Yossef <gilad@...yossef.com>,
Ard Biesheuvel <ardb@...nel.org>,
Jussi Kivilinna <jussi.kivilinna@....fi>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
"H. Peter Anvin" <hpa@...or.com>, linux-crypto@...r.kernel.org,
x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/6] crypto: arm64/sm3-ce - make dependent on sm3
library
Hi
On 12/31/21 3:05 PM, liulongfang wrote:
> On 2021/12/22 12:50, Tianjia Zhang Wrote:
>> SM3 generic library is stand-alone implementation, sm3-ce can depend
>> on the SM3 library instead of sm3-generic.
>>
>> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
>> ---
>> arch/arm64/crypto/Kconfig | 2 +-
>> arch/arm64/crypto/sm3-ce-glue.c | 20 ++++++++++++++------
>> 2 files changed, 15 insertions(+), 7 deletions(-)
>>
>> diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig
>> index addfa413650b..2a965aa0188d 100644
>> --- a/arch/arm64/crypto/Kconfig
>> +++ b/arch/arm64/crypto/Kconfig
>> @@ -45,7 +45,7 @@ config CRYPTO_SM3_ARM64_CE
>> tristate "SM3 digest algorithm (ARMv8.2 Crypto Extensions)"
>> depends on KERNEL_MODE_NEON
>> select CRYPTO_HASH
>> - select CRYPTO_SM3
>> + select CRYPTO_LIB_SM3
>>
>> config CRYPTO_SM4_ARM64_CE
>> tristate "SM4 symmetric cipher (ARMv8.2 Crypto Extensions)"
>> diff --git a/arch/arm64/crypto/sm3-ce-glue.c b/arch/arm64/crypto/sm3-ce-glue.c
>> index d71faca322f2..3198f31c9446 100644
>> --- a/arch/arm64/crypto/sm3-ce-glue.c
>> +++ b/arch/arm64/crypto/sm3-ce-glue.c
>> @@ -27,7 +27,7 @@ static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
>> unsigned int len)
>> {
>> if (!crypto_simd_usable())
>> - return crypto_sm3_update(desc, data, len);
>> + return sm3_update(shash_desc_ctx(desc), data, len);
>>
>> kernel_neon_begin();
>> sm3_base_do_update(desc, data, len, sm3_ce_transform);
>> @@ -39,7 +39,7 @@ static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
>> static int sm3_ce_final(struct shash_desc *desc, u8 *out)
>> {
>> if (!crypto_simd_usable())
>> - return crypto_sm3_finup(desc, NULL, 0, out);
>> + return sm3_final(shash_desc_ctx(desc), out);
>>
>> kernel_neon_begin();
>> sm3_base_do_finalize(desc, sm3_ce_transform);
>> @@ -51,14 +51,22 @@ static int sm3_ce_final(struct shash_desc *desc, u8 *out)
>> static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
>> unsigned int len, u8 *out)
>> {
>> - if (!crypto_simd_usable())
>> - return crypto_sm3_finup(desc, data, len, out);
>> + if (!crypto_simd_usable()) {
>> + struct sm3_state *sctx = shash_desc_ctx(desc);
>> +
>> + if (len)
>> + sm3_update(sctx, data, len);
>> + sm3_final(sctx, out);
>> + return 0;
>> + }
>>
>> kernel_neon_begin();
>> - sm3_base_do_update(desc, data, len, sm3_ce_transform);
>> + if (len)
>> + sm3_base_do_update(desc, data, len, sm3_ce_transform);
>> + sm3_base_do_finalize(desc, sm3_ce_transform);
>> kernel_neon_end();
>>
>> - return sm3_ce_final(desc, out);
>> + return sm3_base_finish(desc, out);
>> }
>>
>> static struct shash_alg sm3_alg = {
>> You have modified the implementation of SM3 algorithm, so what benefits will be gained
> after such modification?
> What flaws are solved or can performance be improved?
> Thanks.
> Longfang.
This modification does not bring obvious performance improvement, but
makes the code logic more reasonable in terms of architecture and
calling level. The calling relationship before modification is:
sm3-ce -> sm3-generic -> sm3-lib,
after this modification is: sm3-ce -> sm3-lib.
Best regards,
Tianjia
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