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Commit 17a06070 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Herbert Xu
Browse files

crypto: arm64/sha2-ce - move the round constant table to .rodata section 



Move the SHA2 round constant table 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 325f562d

arch/arm64/crypto/sha2-ce-core.S

+3 −1
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ 
	/*

	 * The SHA-256 round constants

	 */

	.section	".rodata", "a"

	.align		4

.Lsha2_rcon:

	.word		0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5
@@ -76,9 +77,10 @@ 
	 * void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src,

	 *			  int blocks)

	 */

	.text

ENTRY(sha2_ce_transform)

	/* load round constants */

	adr		x8, .Lsha2_rcon

	adr_l		x8, .Lsha2_rcon

	ld1		{ v0.4s- v3.4s}, [x8], #64

	ld1		{ v4.4s- v7.4s}, [x8], #64

	ld1		{ v8.4s-v11.4s}, [x8], #64