From 931ceb5785755d82d80bb923c22ca08128af7721 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 1 Oct 2025 13:45:49 +0200 Subject: [PATCH] crypto/arm64: polyval - 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 Reviewed-by: Jonathan Cameron Acked-by: Catalin Marinas Signed-off-by: Ard Biesheuvel --- arch/arm64/crypto/polyval-ce-glue.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/arch/arm64/crypto/polyval-ce-glue.c b/arch/arm64/crypto/polyval-ce-glue.c index c4e653688ea05..51eefbe978854 100644 --- a/arch/arm64/crypto/polyval-ce-glue.c +++ b/arch/arm64/crypto/polyval-ce-glue.c @@ -15,7 +15,7 @@ * ARMv8 Crypto Extensions instructions to implement the finite field operations. */ -#include +#include #include #include #include @@ -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, -- 2.47.3