From: Christoph Hellwig <hch@infradead.org>
To: Eric Biggers <ebiggers@kernel.org>
Cc: David Laight <david.laight.linux@gmail.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
linux-raid@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
linux-crypto@vger.kernel.org,
Herbert Xu <herbert@gondor.apana.org.au>,
Taehee Yoo <ap420073@gmail.com>,
netfilter-devel@vger.kernel.org,
Pablo Neira Ayuso <pablo@netfilter.org>,
Florian Westphal <fw@strlen.de>, Phil Sutter <phil@nwl.cc>
Subject: Re: [PATCH 0/6] x86: add missing vzeroupper instructions
Date: Mon, 17 Aug 2026 02:15:19 -0700 [thread overview]
Message-ID: <aoLRJ7igR5GTMfuO@infradead.org> (raw)
In-Reply-To: <20260816173159.GB2013@sol>
On Sun, Aug 16, 2026 at 10:31:59AM -0700, Eric Biggers wrote:
> As for kernel_fpu_begin(), no, it doesn't do vzeroupper.
>
> I do think that some years down the line, we'll drop the use of SSE in
> the kernel entirely. At that point, vzeroupper in kernel_fpu_end()
> would make sense.
Or add kernel_avx_{begin,end} wrappers that include the vzeroupper
in kernel_avx_end. That would be a lot easier to use than the manual
vzeroupper in every modern user of in-kernel AVX.
next prev parent reply other threads:[~2026-08-17 9:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-15 20:57 [PATCH 0/6] x86: add missing vzeroupper instructions Eric Biggers
2026-08-15 20:57 ` [PATCH 1/6] xor: add missing vzeroupper to AVX code Eric Biggers
2026-08-15 20:57 ` [PATCH 2/6] raid6: add missing vzeroupper to AVX2 code Eric Biggers
2026-08-15 20:57 ` [PATCH 3/6] raid6: add missing vzeroupper to AVX-512 code Eric Biggers
2026-08-15 20:57 ` [PATCH 4/6] crypto: x86/aria - add missing vzeroupper in AVX2 code Eric Biggers
2026-08-15 20:57 ` [PATCH 5/6] crypto: x86/aria - add missing vzeroupper in AVX-512 code Eric Biggers
2026-08-15 20:57 ` [PATCH 6/6] netfilter: nft_set_pipapo_avx2: add missing vzeroupper Eric Biggers
2026-08-16 10:38 ` Stefano Brivio
2026-08-16 17:15 ` Eric Biggers
2026-08-17 11:17 ` Stefano Brivio
2026-08-17 11:17 ` Stefano Brivio
2026-08-16 15:14 ` [PATCH 0/6] x86: add missing vzeroupper instructions David Laight
2026-08-16 17:31 ` Eric Biggers
2026-08-17 9:15 ` Christoph Hellwig [this message]
2026-08-17 10:55 ` David Laight
2026-08-17 17:18 ` Eric Biggers
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