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Date: Tue, 1 Oct 2019 14:42:01 +0200
From: Ard Biesheuvel <ard.biesheuvel@...aro.org>
To: kbuild test robot <lkp@...el.com>,
Herbert Xu <herbert@...dor.apana.org.au>
Cc: kbuild-all@...org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: arch/arm/crypto/aes-ce-core.S:467: Error: selected processor does
not support `movw ip,:lower16:.Lcts_permute_table' in ARM mode
On Tue, 1 Oct 2019 at 13:39, kbuild test robot <lkp@...el.com> wrote:
>
> Hi Ard,
>
> FYI, the error/warning still remains.
Should be fixed by
https://lore.kernel.org/linux-crypto/20190917085001.792-1-ard.biesheuvel@arm.com/
sent out ~2 weeks ago.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c
> commit: c61b1607ed4fbbf2ba7c86f29768cff44a1a88f8 crypto: arm/aes-ce - implement ciphertext stealing for XTS
> date: 3 weeks ago
> config: arm-allmodconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0
> reproduce:
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> git checkout c61b1607ed4fbbf2ba7c86f29768cff44a1a88f8
> # save the attached .config to linux build tree
> GCC_VERSION=7.4.0 make.cross ARCH=arm
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
> arch/arm/crypto/aes-ce-core.S: Assembler messages:
> >> arch/arm/crypto/aes-ce-core.S:467: Error: selected processor does not support `movw ip,:lower16:.Lcts_permute_table' in ARM mode
> >> arch/arm/crypto/aes-ce-core.S:468: Error: selected processor does not support `movt ip,:upper16:.Lcts_permute_table' in ARM mode
> arch/arm/crypto/aes-ce-core.S:553: Error: selected processor does not support `movw ip,:lower16:.Lcts_permute_table' in ARM mode
> arch/arm/crypto/aes-ce-core.S:554: Error: selected processor does not support `movt ip,:upper16:.Lcts_permute_table' in ARM mode
>
> vim +467 arch/arm/crypto/aes-ce-core.S
>
> 403
> 404 ENTRY(ce_aes_xts_encrypt)
> 405 push {r4-r6, lr}
> 406
> 407 bl ce_aes_xts_init @ run shared prologue
> 408 prepare_key r2, r3
> 409 vmov q4, q0
> 410
> 411 teq r6, #0 @ start of a block?
> 412 bne .Lxtsenc4x
> 413
> 414 .Lxtsencloop4x:
> 415 next_tweak q4, q4, q15, q10
> 416 .Lxtsenc4x:
> 417 subs r4, r4, #64
> 418 bmi .Lxtsenc1x
> 419 vld1.8 {q0-q1}, [r1]! @ get 4 pt blocks
> 420 vld1.8 {q2-q3}, [r1]!
> 421 next_tweak q5, q4, q15, q10
> 422 veor q0, q0, q4
> 423 next_tweak q6, q5, q15, q10
> 424 veor q1, q1, q5
> 425 next_tweak q7, q6, q15, q10
> 426 veor q2, q2, q6
> 427 veor q3, q3, q7
> 428 bl aes_encrypt_4x
> 429 veor q0, q0, q4
> 430 veor q1, q1, q5
> 431 veor q2, q2, q6
> 432 veor q3, q3, q7
> 433 vst1.8 {q0-q1}, [r0]! @ write 4 ct blocks
> 434 vst1.8 {q2-q3}, [r0]!
> 435 vmov q4, q7
> 436 teq r4, #0
> 437 beq .Lxtsencret
> 438 b .Lxtsencloop4x
> 439 .Lxtsenc1x:
> 440 adds r4, r4, #64
> 441 beq .Lxtsencout
> 442 subs r4, r4, #16
> 443 bmi .LxtsencctsNx
> 444 .Lxtsencloop:
> 445 vld1.8 {q0}, [r1]!
> 446 .Lxtsencctsout:
> 447 veor q0, q0, q4
> 448 bl aes_encrypt
> 449 veor q0, q0, q4
> 450 teq r4, #0
> 451 beq .Lxtsencout
> 452 subs r4, r4, #16
> 453 next_tweak q4, q4, q15, q6
> 454 bmi .Lxtsenccts
> 455 vst1.8 {q0}, [r0]!
> 456 b .Lxtsencloop
> 457 .Lxtsencout:
> 458 vst1.8 {q0}, [r0]
> 459 .Lxtsencret:
> 460 vst1.8 {q4}, [r5]
> 461 pop {r4-r6, pc}
> 462
> 463 .LxtsencctsNx:
> 464 vmov q0, q3
> 465 sub r0, r0, #16
> 466 .Lxtsenccts:
> > 467 movw ip, :lower16:.Lcts_permute_table
> > 468 movt ip, :upper16:.Lcts_permute_table
> 469
> 470 add r1, r1, r4 @ rewind input pointer
> 471 add r4, r4, #16 @ # bytes in final block
> 472 add lr, ip, #32
> 473 add ip, ip, r4
> 474 sub lr, lr, r4
> 475 add r4, r0, r4 @ output address of final block
> 476
> 477 vld1.8 {q1}, [r1] @ load final partial block
> 478 vld1.8 {q2}, [ip]
> 479 vld1.8 {q3}, [lr]
> 480
> 481 vtbl.8 d4, {d0-d1}, d4
> 482 vtbl.8 d5, {d0-d1}, d5
> 483 vtbx.8 d0, {d2-d3}, d6
> 484 vtbx.8 d1, {d2-d3}, d7
> 485
> 486 vst1.8 {q2}, [r4] @ overlapping stores
> 487 mov r4, #0
> 488 b .Lxtsencctsout
> 489 ENDPROC(ce_aes_xts_encrypt)
> 490
> 491
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
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