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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: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-01-10 12:11:39 +00:00 committed by Herbert Xu
parent 62c2470876
commit eec7d4593a
1 changed files with 4 additions and 3 deletions
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7
arch/arm64/crypto/crc32-ce-core.S
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@ -50,7 +50,7 @@
#include <linux/linkage.h> #include <linux/linkage.h>
#include <asm/assembler.h> #include <asm/assembler.h>
.text .section ".rodata", "a"
.align 6 .align 6
.cpu generic+crypto+crc .cpu generic+crypto+crc
@ -115,12 +115,13 @@
* uint crc32_pmull_le(unsigned char const *buffer, * uint crc32_pmull_le(unsigned char const *buffer,
* size_t len, uint crc32) * size_t len, uint crc32)
*/ */
.text
ENTRY(crc32_pmull_le) ENTRY(crc32_pmull_le)
adr x3, .Lcrc32_constants adr_l x3, .Lcrc32_constants
b 0f b 0f
ENTRY(crc32c_pmull_le) ENTRY(crc32c_pmull_le)
adr x3, .Lcrc32c_constants adr_l x3, .Lcrc32c_constants
0: bic LEN, LEN, #15 0: bic LEN, LEN, #15
ld1 {v1.16b-v4.16b}, [BUF], #0x40 ld1 {v1.16b-v4.16b}, [BUF], #0x40