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crypto/arm64: polyval - 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 13:45:49 +02:00
parent 72cb51233b
commit 931ceb5785
1 changed files with 5 additions and 7 deletions
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12
arch/arm64/crypto/polyval-ce-glue.c
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@ -15,7 +15,7 @@
* ARMv8 Crypto Extensions instructions to implement the finite field operations.
*/
#include <asm/neon.h>
#include <asm/simd.h>
#include <crypto/internal/hash.h>
#include <crypto/polyval.h>
#include <crypto/utils.h>
@ -45,16 +45,14 @@ asmlinkage void pmull_polyval_mul(u8 *op1, const u8 *op2);
static void internal_polyval_update(const struct polyval_tfm_ctx *keys,
const u8 *in, size_t nblocks, u8 *accumulator)
{
kernel_neon_begin();
pmull_polyval_update(keys, in, nblocks, accumulator);
kernel_neon_end();
scoped_ksimd()
pmull_polyval_update(keys, in, nblocks, accumulator);
}
static void internal_polyval_mul(u8 *op1, const u8 *op2)
{
kernel_neon_begin();
pmull_polyval_mul(op1, op2);
kernel_neon_end();
scoped_ksimd()
pmull_polyval_mul(op1, op2);
}
static int polyval_arm64_setkey(struct crypto_shash *tfm,