Commit 931ceb57 authored by Ard Biesheuvel's avatar Ard Biesheuvel
Browse files

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: default avatarEric Biggers <ebiggers@kernel.org>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 72cb5123

arch/arm64/crypto/polyval-ce-glue.c

+5 −7
Original line number Diff line number Diff line
@@ -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();

	scoped_ksimd()

		pmull_polyval_update(keys, in, nblocks, accumulator);

	kernel_neon_end();

}



static void internal_polyval_mul(u8 *op1, const u8 *op2)

{

	kernel_neon_begin();

	scoped_ksimd()

		pmull_polyval_mul(op1, op2);

	kernel_neon_end();

}



static int polyval_arm64_setkey(struct crypto_shash *tfm,