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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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13
lib/crypto/arm/sha1.h
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@@ -4,7 +4,6 @@
*
* Copyright 2025 Google LLC
*/
#include <asm/neon.h>
#include <asm/simd.h>
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
@@ -22,12 +21,12 @@ static void sha1_blocks(struct sha1_block_state *state,
{
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
static_branch_likely(&have_neon) && likely(may_use_simd())) {
kernel_neon_begin();
if (static_branch_likely(&have_ce))
sha1_ce_transform(state, data, nblocks);
else
sha1_transform_neon(state, data, nblocks);
kernel_neon_end();
scoped_ksimd() {
if (static_branch_likely(&have_ce))
sha1_ce_transform(state, data, nblocks);
else
sha1_transform_neon(state, data, nblocks);
}
} else {
sha1_block_data_order(state, data, nblocks);
}