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| author | Ard Biesheuvel <ardb@kernel.org> | 2025-10-01 14:47:13 +0300 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2025-11-12 11:52:02 +0300 |
| commit | a6b40844550c73805fe8490bafc0e33ff5922f6c (patch) | |
| tree | ddf16a912f267fb2d532ece98ab65811c8f9018e | |
| parent | 931ceb5785755d82d80bb923c22ca08128af7721 (diff) | |
| download | linux-a6b40844550c73805fe8490bafc0e33ff5922f6c.tar.xz | |
crypto/arm64: sha3 - Switch to 'ksimd' scoped guard API
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>
| -rw-r--r-- | arch/arm64/crypto/sha3-ce-glue.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/arm64/crypto/sha3-ce-glue.c b/arch/arm64/crypto/sha3-ce-glue.c index b4f1001046c9..22732760edd3 100644 --- a/arch/arm64/crypto/sha3-ce-glue.c +++ b/arch/arm64/crypto/sha3-ce-glue.c @@ -46,9 +46,8 @@ static int sha3_update(struct shash_desc *desc, const u8 *data, do { int rem; - kernel_neon_begin(); - rem = sha3_ce_transform(sctx->st, data, blocks, ds); - kernel_neon_end(); + scoped_ksimd() + rem = sha3_ce_transform(sctx->st, data, blocks, ds); data += (blocks - rem) * bs; blocks = rem; } while (blocks); @@ -73,9 +72,8 @@ static int sha3_finup(struct shash_desc *desc, const u8 *src, unsigned int len, memset(block + len, 0, bs - len); block[bs - 1] |= 0x80; - kernel_neon_begin(); - sha3_ce_transform(sctx->st, block, 1, ds); - kernel_neon_end(); + scoped_ksimd() + sha3_ce_transform(sctx->st, block, 1, ds); memzero_explicit(block , sizeof(block)); for (i = 0; i < ds / 8; i++) |