From: Eric Biggers <ebiggers@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
x86@kernel.org, linux-block@vger.kernel.org,
Ard Biesheuvel <ardb@kernel.org>, Keith Busch <kbusch@kernel.org>,
Kent Overstreet <kent.overstreet@linux.dev>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v4 1/6] x86: move ZMM exclusion list into CPU feature flag
Date: Mon, 10 Feb 2025 13:01:03 -0800 [thread overview]
Message-ID: <20250210210103.GC348261@sol.localdomain> (raw)
In-Reply-To: <20250210204030.GBZ6pkPumjGQMaHWLb@fat_crate.local>
On Mon, Feb 10, 2025 at 09:40:30PM +0100, Borislav Petkov wrote:
> On Mon, Feb 10, 2025 at 09:45:35AM -0800, Eric Biggers wrote:
> > @@ -1598,11 +1578,11 @@ static int __init register_avx_algs(void)
> > ARRAY_SIZE(aes_gcm_algs_vaes_avx10_256),
> > aes_gcm_simdalgs_vaes_avx10_256);
> > if (err)
> > return err;
> >
> > - if (x86_match_cpu(zmm_exclusion_list)) {
> > + if (boot_cpu_has(X86_FEATURE_PREFER_YMM)) {
>
> s/boot_cpu_has/cpu_feature_enabled/
>
$ git grep boot_cpu_has arch/x86/crypto | wc -l
87
$ git grep cpu_feature_enabled arch/x86/crypto | wc -l
0
It wouldn't make sense to change just this one. Should they really all be
changed?
I see that cpu_feature_enabled() uses code patching while boot_cpu_has() does
not. All these checks occur once at module load time, though, so code patching
wouldn't be beneficial.
- Eric
next prev parent reply other threads:[~2025-02-10 21:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-10 17:45 [PATCH v4 0/6] x86 CRC optimizations Eric Biggers
2025-02-10 17:45 ` [PATCH v4 1/6] x86: move ZMM exclusion list into CPU feature flag Eric Biggers
2025-02-10 20:40 ` Borislav Petkov
2025-02-10 21:01 ` Eric Biggers [this message]
2025-02-10 21:17 ` Borislav Petkov
2025-02-10 21:37 ` Eric Biggers
2025-02-10 21:49 ` Borislav Petkov
2025-02-10 17:45 ` [PATCH v4 2/6] scripts/gen-crc-consts: add gen-crc-consts.py Eric Biggers
2025-02-10 17:45 ` [PATCH v4 3/6] x86/crc: add "template" for [V]PCLMULQDQ based CRC functions Eric Biggers
2025-02-10 17:45 ` [PATCH v4 4/6] x86/crc32: implement crc32_le using new template Eric Biggers
2025-02-10 17:45 ` [PATCH v4 5/6] x86/crc-t10dif: implement crc_t10dif " Eric Biggers
2025-02-10 17:45 ` [PATCH v4 6/6] x86/crc64: implement crc64_be and crc64_nvme " Eric Biggers
2025-02-10 18:01 ` [PATCH v4 0/6] x86 CRC optimizations Eric Biggers
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