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crypto/arm64: nhpoly1305 - Switch to 'ksimd' scoped guard API

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Switch to the more abstract 'scoped_ksimd()' API, which will be modified
in a future patch to transparently allocate a kernel mode FP/SIMD state
buffer on the stack, so that kernel mode FP/SIMD code remains
preemptible in principe, but without the memory overhead that adds 528
bytes to the size of struct task_struct.

Reviewed-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2025-10-01 13:44:23 +02:00
parent 87c9b04e71
commit 72cb51233b
1 changed files with 2 additions and 3 deletions
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5
arch/arm64/crypto/nhpoly1305-neon-glue.c
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@ -25,9 +25,8 @@ static int nhpoly1305_neon_update(struct shash_desc *desc,
do {
unsigned int n = min_t(unsigned int, srclen, SZ_4K);
kernel_neon_begin();
crypto_nhpoly1305_update_helper(desc, src, n, nh_neon);
kernel_neon_end();
scoped_ksimd()
crypto_nhpoly1305_update_helper(desc, src, n, nh_neon);
src += n;
srclen -= n;
} while (srclen);