crypto: arm64/aes-bs - yield NEON after every block of input
Avoid excessive scheduling delays under a preemptible kernel by yielding the NEON after every block of input. 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
Herbert Xu
Родитель
0c8f838a52
Коммит
20ab633258
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@ -565,54 +565,61 @@ ENDPROC(aesbs_decrypt8)
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* int blocks)
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*/
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.macro __ecb_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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frame_push 5
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mov x19, x0
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mov x20, x1
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mov x21, x2
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mov x22, x3
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mov x23, x4
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99: mov x5, #1
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lsl x5, x5, x4
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subs w4, w4, #8
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csel x4, x4, xzr, pl
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lsl x5, x5, x23
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subs w23, w23, #8
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csel x23, x23, xzr, pl
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csel x5, x5, xzr, mi
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ld1 {v0.16b}, [x1], #16
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ld1 {v0.16b}, [x20], #16
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tbnz x5, #1, 0f
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ld1 {v1.16b}, [x1], #16
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ld1 {v1.16b}, [x20], #16
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tbnz x5, #2, 0f
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ld1 {v2.16b}, [x1], #16
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ld1 {v2.16b}, [x20], #16
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tbnz x5, #3, 0f
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ld1 {v3.16b}, [x1], #16
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ld1 {v3.16b}, [x20], #16
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tbnz x5, #4, 0f
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ld1 {v4.16b}, [x1], #16
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ld1 {v4.16b}, [x20], #16
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tbnz x5, #5, 0f
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ld1 {v5.16b}, [x1], #16
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ld1 {v5.16b}, [x20], #16
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tbnz x5, #6, 0f
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ld1 {v6.16b}, [x1], #16
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ld1 {v6.16b}, [x20], #16
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tbnz x5, #7, 0f
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ld1 {v7.16b}, [x1], #16
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ld1 {v7.16b}, [x20], #16
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0: mov bskey, x2
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mov rounds, x3
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0: mov bskey, x21
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mov rounds, x22
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bl \do8
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st1 {\o0\().16b}, [x0], #16
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st1 {\o0\().16b}, [x19], #16
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tbnz x5, #1, 1f
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st1 {\o1\().16b}, [x0], #16
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st1 {\o1\().16b}, [x19], #16
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tbnz x5, #2, 1f
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st1 {\o2\().16b}, [x0], #16
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st1 {\o2\().16b}, [x19], #16
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tbnz x5, #3, 1f
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st1 {\o3\().16b}, [x0], #16
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st1 {\o3\().16b}, [x19], #16
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tbnz x5, #4, 1f
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st1 {\o4\().16b}, [x0], #16
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st1 {\o4\().16b}, [x19], #16
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tbnz x5, #5, 1f
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st1 {\o5\().16b}, [x0], #16
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st1 {\o5\().16b}, [x19], #16
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tbnz x5, #6, 1f
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st1 {\o6\().16b}, [x0], #16
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st1 {\o6\().16b}, [x19], #16
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tbnz x5, #7, 1f
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st1 {\o7\().16b}, [x0], #16
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st1 {\o7\().16b}, [x19], #16
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cbnz x4, 99b
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cbz x23, 1f
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cond_yield_neon
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b 99b
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1: ldp x29, x30, [sp], #16
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1: frame_pop
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ret
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.endm
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@ -632,43 +639,49 @@ ENDPROC(aesbs_ecb_decrypt)
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*/
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.align 4
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ENTRY(aesbs_cbc_decrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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frame_push 6
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mov x19, x0
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mov x20, x1
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mov x21, x2
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mov x22, x3
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mov x23, x4
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mov x24, x5
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99: mov x6, #1
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lsl x6, x6, x4
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subs w4, w4, #8
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csel x4, x4, xzr, pl
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lsl x6, x6, x23
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subs w23, w23, #8
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csel x23, x23, xzr, pl
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csel x6, x6, xzr, mi
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ld1 {v0.16b}, [x1], #16
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ld1 {v0.16b}, [x20], #16
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mov v25.16b, v0.16b
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tbnz x6, #1, 0f
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ld1 {v1.16b}, [x1], #16
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ld1 {v1.16b}, [x20], #16
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mov v26.16b, v1.16b
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tbnz x6, #2, 0f
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ld1 {v2.16b}, [x1], #16
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ld1 {v2.16b}, [x20], #16
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mov v27.16b, v2.16b
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tbnz x6, #3, 0f
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ld1 {v3.16b}, [x1], #16
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ld1 {v3.16b}, [x20], #16
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mov v28.16b, v3.16b
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tbnz x6, #4, 0f
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ld1 {v4.16b}, [x1], #16
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ld1 {v4.16b}, [x20], #16
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mov v29.16b, v4.16b
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tbnz x6, #5, 0f
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ld1 {v5.16b}, [x1], #16
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ld1 {v5.16b}, [x20], #16
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mov v30.16b, v5.16b
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tbnz x6, #6, 0f
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ld1 {v6.16b}, [x1], #16
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ld1 {v6.16b}, [x20], #16
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mov v31.16b, v6.16b
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tbnz x6, #7, 0f
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ld1 {v7.16b}, [x1]
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ld1 {v7.16b}, [x20]
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0: mov bskey, x2
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mov rounds, x3
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0: mov bskey, x21
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mov rounds, x22
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bl aesbs_decrypt8
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ld1 {v24.16b}, [x5] // load IV
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ld1 {v24.16b}, [x24] // load IV
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eor v1.16b, v1.16b, v25.16b
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eor v6.16b, v6.16b, v26.16b
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@ -679,34 +692,36 @@ ENTRY(aesbs_cbc_decrypt)
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eor v3.16b, v3.16b, v30.16b
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eor v5.16b, v5.16b, v31.16b
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st1 {v0.16b}, [x0], #16
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st1 {v0.16b}, [x19], #16
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mov v24.16b, v25.16b
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tbnz x6, #1, 1f
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st1 {v1.16b}, [x0], #16
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st1 {v1.16b}, [x19], #16
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mov v24.16b, v26.16b
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tbnz x6, #2, 1f
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st1 {v6.16b}, [x0], #16
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st1 {v6.16b}, [x19], #16
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mov v24.16b, v27.16b
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tbnz x6, #3, 1f
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st1 {v4.16b}, [x0], #16
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st1 {v4.16b}, [x19], #16
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mov v24.16b, v28.16b
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tbnz x6, #4, 1f
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st1 {v2.16b}, [x0], #16
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st1 {v2.16b}, [x19], #16
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mov v24.16b, v29.16b
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tbnz x6, #5, 1f
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st1 {v7.16b}, [x0], #16
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st1 {v7.16b}, [x19], #16
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mov v24.16b, v30.16b
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tbnz x6, #6, 1f
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st1 {v3.16b}, [x0], #16
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st1 {v3.16b}, [x19], #16
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mov v24.16b, v31.16b
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tbnz x6, #7, 1f
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ld1 {v24.16b}, [x1], #16
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st1 {v5.16b}, [x0], #16
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1: st1 {v24.16b}, [x5] // store IV
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ld1 {v24.16b}, [x20], #16
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st1 {v5.16b}, [x19], #16
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1: st1 {v24.16b}, [x24] // store IV
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cbnz x4, 99b
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cbz x23, 2f
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cond_yield_neon
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b 99b
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ldp x29, x30, [sp], #16
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2: frame_pop
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ret
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ENDPROC(aesbs_cbc_decrypt)
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@ -731,87 +746,93 @@ CPU_BE( .quad 0x87, 1 )
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*/
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__xts_crypt8:
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mov x6, #1
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lsl x6, x6, x4
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subs w4, w4, #8
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csel x4, x4, xzr, pl
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lsl x6, x6, x23
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subs w23, w23, #8
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csel x23, x23, xzr, pl
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csel x6, x6, xzr, mi
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ld1 {v0.16b}, [x1], #16
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ld1 {v0.16b}, [x20], #16
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next_tweak v26, v25, v30, v31
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eor v0.16b, v0.16b, v25.16b
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tbnz x6, #1, 0f
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ld1 {v1.16b}, [x1], #16
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ld1 {v1.16b}, [x20], #16
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next_tweak v27, v26, v30, v31
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eor v1.16b, v1.16b, v26.16b
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tbnz x6, #2, 0f
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ld1 {v2.16b}, [x1], #16
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ld1 {v2.16b}, [x20], #16
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next_tweak v28, v27, v30, v31
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eor v2.16b, v2.16b, v27.16b
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tbnz x6, #3, 0f
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ld1 {v3.16b}, [x1], #16
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ld1 {v3.16b}, [x20], #16
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next_tweak v29, v28, v30, v31
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eor v3.16b, v3.16b, v28.16b
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tbnz x6, #4, 0f
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ld1 {v4.16b}, [x1], #16
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str q29, [sp, #16]
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ld1 {v4.16b}, [x20], #16
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str q29, [sp, #.Lframe_local_offset]
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eor v4.16b, v4.16b, v29.16b
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next_tweak v29, v29, v30, v31
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tbnz x6, #5, 0f
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ld1 {v5.16b}, [x1], #16
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str q29, [sp, #32]
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ld1 {v5.16b}, [x20], #16
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str q29, [sp, #.Lframe_local_offset + 16]
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eor v5.16b, v5.16b, v29.16b
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next_tweak v29, v29, v30, v31
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tbnz x6, #6, 0f
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ld1 {v6.16b}, [x1], #16
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str q29, [sp, #48]
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ld1 {v6.16b}, [x20], #16
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str q29, [sp, #.Lframe_local_offset + 32]
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eor v6.16b, v6.16b, v29.16b
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next_tweak v29, v29, v30, v31
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tbnz x6, #7, 0f
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ld1 {v7.16b}, [x1], #16
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str q29, [sp, #64]
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ld1 {v7.16b}, [x20], #16
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str q29, [sp, #.Lframe_local_offset + 48]
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eor v7.16b, v7.16b, v29.16b
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next_tweak v29, v29, v30, v31
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0: mov bskey, x2
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mov rounds, x3
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0: mov bskey, x21
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mov rounds, x22
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br x7
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ENDPROC(__xts_crypt8)
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.macro __xts_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7
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stp x29, x30, [sp, #-80]!
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mov x29, sp
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frame_push 6, 64
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ldr q30, .Lxts_mul_x
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ld1 {v25.16b}, [x5]
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mov x19, x0
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mov x20, x1
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mov x21, x2
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mov x22, x3
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mov x23, x4
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mov x24, x5
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0: ldr q30, .Lxts_mul_x
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ld1 {v25.16b}, [x24]
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99: adr x7, \do8
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bl __xts_crypt8
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ldp q16, q17, [sp, #16]
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ldp q18, q19, [sp, #48]
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ldp q16, q17, [sp, #.Lframe_local_offset]
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ldp q18, q19, [sp, #.Lframe_local_offset + 32]
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eor \o0\().16b, \o0\().16b, v25.16b
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eor \o1\().16b, \o1\().16b, v26.16b
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eor \o2\().16b, \o2\().16b, v27.16b
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eor \o3\().16b, \o3\().16b, v28.16b
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st1 {\o0\().16b}, [x0], #16
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st1 {\o0\().16b}, [x19], #16
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mov v25.16b, v26.16b
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tbnz x6, #1, 1f
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st1 {\o1\().16b}, [x0], #16
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st1 {\o1\().16b}, [x19], #16
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mov v25.16b, v27.16b
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tbnz x6, #2, 1f
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st1 {\o2\().16b}, [x0], #16
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st1 {\o2\().16b}, [x19], #16
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mov v25.16b, v28.16b
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tbnz x6, #3, 1f
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st1 {\o3\().16b}, [x0], #16
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st1 {\o3\().16b}, [x19], #16
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mov v25.16b, v29.16b
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tbnz x6, #4, 1f
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@ -820,18 +841,22 @@ ENDPROC(__xts_crypt8)
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eor \o6\().16b, \o6\().16b, v18.16b
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eor \o7\().16b, \o7\().16b, v19.16b
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st1 {\o4\().16b}, [x0], #16
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st1 {\o4\().16b}, [x19], #16
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tbnz x6, #5, 1f
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st1 {\o5\().16b}, [x0], #16
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st1 {\o5\().16b}, [x19], #16
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tbnz x6, #6, 1f
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st1 {\o6\().16b}, [x0], #16
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st1 {\o6\().16b}, [x19], #16
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tbnz x6, #7, 1f
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st1 {\o7\().16b}, [x0], #16
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st1 {\o7\().16b}, [x19], #16
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cbnz x4, 99b
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cbz x23, 1f
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st1 {v25.16b}, [x24]
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1: st1 {v25.16b}, [x5]
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ldp x29, x30, [sp], #80
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cond_yield_neon 0b
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b 99b
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1: st1 {v25.16b}, [x24]
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frame_pop
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ret
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.endm
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@ -856,24 +881,31 @@ ENDPROC(aesbs_xts_decrypt)
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* int rounds, int blocks, u8 iv[], u8 final[])
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*/
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ENTRY(aesbs_ctr_encrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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frame_push 8
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cmp x6, #0
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cset x10, ne
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add x4, x4, x10 // do one extra block if final
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mov x19, x0
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mov x20, x1
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mov x21, x2
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mov x22, x3
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mov x23, x4
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mov x24, x5
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mov x25, x6
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ldp x7, x8, [x5]
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ld1 {v0.16b}, [x5]
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cmp x25, #0
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cset x26, ne
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add x23, x23, x26 // do one extra block if final
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98: ldp x7, x8, [x24]
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ld1 {v0.16b}, [x24]
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CPU_LE( rev x7, x7 )
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CPU_LE( rev x8, x8 )
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adds x8, x8, #1
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adc x7, x7, xzr
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99: mov x9, #1
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lsl x9, x9, x4
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subs w4, w4, #8
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csel x4, x4, xzr, pl
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lsl x9, x9, x23
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subs w23, w23, #8
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csel x23, x23, xzr, pl
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csel x9, x9, xzr, le
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tbnz x9, #1, 0f
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@ -891,82 +923,85 @@ CPU_LE( rev x8, x8 )
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tbnz x9, #7, 0f
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next_ctr v7
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0: mov bskey, x2
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mov rounds, x3
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0: mov bskey, x21
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mov rounds, x22
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bl aesbs_encrypt8
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lsr x9, x9, x10 // disregard the extra block
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lsr x9, x9, x26 // disregard the extra block
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tbnz x9, #0, 0f
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ld1 {v8.16b}, [x1], #16
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ld1 {v8.16b}, [x20], #16
|
||||
eor v0.16b, v0.16b, v8.16b
|
||||
st1 {v0.16b}, [x0], #16
|
||||
st1 {v0.16b}, [x19], #16
|
||||
tbnz x9, #1, 1f
|
||||
|
||||
ld1 {v9.16b}, [x1], #16
|
||||
ld1 {v9.16b}, [x20], #16
|
||||
eor v1.16b, v1.16b, v9.16b
|
||||
st1 {v1.16b}, [x0], #16
|
||||
st1 {v1.16b}, [x19], #16
|
||||
tbnz x9, #2, 2f
|
||||
|
||||
ld1 {v10.16b}, [x1], #16
|
||||
ld1 {v10.16b}, [x20], #16
|
||||
eor v4.16b, v4.16b, v10.16b
|
||||
st1 {v4.16b}, [x0], #16
|
||||
st1 {v4.16b}, [x19], #16
|
||||
tbnz x9, #3, 3f
|
||||
|
||||
ld1 {v11.16b}, [x1], #16
|
||||
ld1 {v11.16b}, [x20], #16
|
||||
eor v6.16b, v6.16b, v11.16b
|
||||
st1 {v6.16b}, [x0], #16
|
||||
st1 {v6.16b}, [x19], #16
|
||||
tbnz x9, #4, 4f
|
||||
|
||||
ld1 {v12.16b}, [x1], #16
|
||||
ld1 {v12.16b}, [x20], #16
|
||||
eor v3.16b, v3.16b, v12.16b
|
||||
st1 {v3.16b}, [x0], #16
|
||||
st1 {v3.16b}, [x19], #16
|
||||
tbnz x9, #5, 5f
|
||||
|
||||
ld1 {v13.16b}, [x1], #16
|
||||
ld1 {v13.16b}, [x20], #16
|
||||
eor v7.16b, v7.16b, v13.16b
|
||||
st1 {v7.16b}, [x0], #16
|
||||
st1 {v7.16b}, [x19], #16
|
||||
tbnz x9, #6, 6f
|
||||
|
||||
ld1 {v14.16b}, [x1], #16
|
||||
ld1 {v14.16b}, [x20], #16
|
||||
eor v2.16b, v2.16b, v14.16b
|
||||
st1 {v2.16b}, [x0], #16
|
||||
st1 {v2.16b}, [x19], #16
|
||||
tbnz x9, #7, 7f
|
||||
|
||||
ld1 {v15.16b}, [x1], #16
|
||||
ld1 {v15.16b}, [x20], #16
|
||||
eor v5.16b, v5.16b, v15.16b
|
||||
st1 {v5.16b}, [x0], #16
|
||||
st1 {v5.16b}, [x19], #16
|
||||
|
||||
8: next_ctr v0
|
||||
cbnz x4, 99b
|
||||
st1 {v0.16b}, [x24]
|
||||
cbz x23, 0f
|
||||
|
||||
0: st1 {v0.16b}, [x5]
|
||||
ldp x29, x30, [sp], #16
|
||||
cond_yield_neon 98b
|
||||
b 99b
|
||||
|
||||
0: frame_pop
|
||||
ret
|
||||
|
||||
/*
|
||||
* If we are handling the tail of the input (x6 != NULL), return the
|
||||
* final keystream block back to the caller.
|
||||
*/
|
||||
1: cbz x6, 8b
|
||||
st1 {v1.16b}, [x6]
|
||||
1: cbz x25, 8b
|
||||
st1 {v1.16b}, [x25]
|
||||
b 8b
|
||||
2: cbz x6, 8b
|
||||
st1 {v4.16b}, [x6]
|
||||
2: cbz x25, 8b
|
||||
st1 {v4.16b}, [x25]
|
||||
b 8b
|
||||
3: cbz x6, 8b
|
||||
st1 {v6.16b}, [x6]
|
||||
3: cbz x25, 8b
|
||||
st1 {v6.16b}, [x25]
|
||||
b 8b
|
||||
4: cbz x6, 8b
|
||||
st1 {v3.16b}, [x6]
|
||||
4: cbz x25, 8b
|
||||
st1 {v3.16b}, [x25]
|
||||
b 8b
|
||||
5: cbz x6, 8b
|
||||
st1 {v7.16b}, [x6]
|
||||
5: cbz x25, 8b
|
||||
st1 {v7.16b}, [x25]
|
||||
b 8b
|
||||
6: cbz x6, 8b
|
||||
st1 {v2.16b}, [x6]
|
||||
6: cbz x25, 8b
|
||||
st1 {v2.16b}, [x25]
|
||||
b 8b
|
||||
7: cbz x6, 8b
|
||||
st1 {v5.16b}, [x6]
|
||||
7: cbz x25, 8b
|
||||
st1 {v5.16b}, [x25]
|
||||
b 8b
|
||||
ENDPROC(aesbs_ctr_encrypt)
|
||||
|
|
|
|||
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