Re: [PATCH 0/6] x86: add missing vzeroupper instructions

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.