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lib/crypto: Switch ARM and arm64 to 'ksimd' scoped guard API

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Before modifying the prototypes of kernel_neon_begin() and
kernel_neon_end() to accommodate kernel mode FP/SIMD state buffers
allocated on the stack, move arm64 to the new 'ksimd' scoped guard API,
which encapsulates the calls to those functions.

For symmetry, do the same for 32-bit ARM too.

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 13:29:23 +02:00
parent 814f5415d3
commit f53d18a4e6
11 changed files with 43 additions and 60 deletions
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7
lib/crypto/arm64/sha1.h
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@@ -4,7 +4,6 @@
*
* Copyright 2025 Google LLC
*/
#include <asm/neon.h>
#include <asm/simd.h>
#include <linux/cpufeature.h>
@@ -20,9 +19,9 @@ static void sha1_blocks(struct sha1_block_state *state,
do {
size_t rem;
kernel_neon_begin();
rem = __sha1_ce_transform(state, data, nblocks);
kernel_neon_end();
scoped_ksimd()
rem = __sha1_ce_transform(state, data, nblocks);
data += (nblocks - rem) * SHA1_BLOCK_SIZE;
nblocks = rem;
} while (nblocks);