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Commit eec7d459 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Herbert Xu
Browse files

crypto: arm64/crc32 - move literal data to .rodata section 



Move CRC32 literal data to the .rodata section where it is safe from
being exploited by speculative execution.

Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 62c24708

arch/arm64/crypto/crc32-ce-core.S

+4 −3
Original line number Diff line number Diff line
@@ -50,7 +50,7 @@ 
#include <linux/linkage.h>

#include <asm/assembler.h>



	.text

	.section	".rodata", "a"

	.align		6

	.cpu		generic+crypto+crc
@@ -115,12 +115,13 @@ 
	 * uint crc32_pmull_le(unsigned char const *buffer,

	 *                     size_t len, uint crc32)

	 */

	.text

ENTRY(crc32_pmull_le)

	adr		x3, .Lcrc32_constants

	adr_l		x3, .Lcrc32_constants

	b		0f



ENTRY(crc32c_pmull_le)

	adr		x3, .Lcrc32c_constants

	adr_l		x3, .Lcrc32c_constants



0:	bic		LEN, LEN, #15

	ld1		{v1.16b-v4.16b}, [BUF], #0x40