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[209.132.180.67]) by mx.google.com with ESMTP id f66-v6si5264259pgc.391.2018.04.30.09.18.56; Mon, 30 Apr 2018 09:18:56 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=RE6ONQZF; spf=pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-crypto-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754579AbeD3QSz (ORCPT + 1 other); Mon, 30 Apr 2018 12:18:55 -0400 Received: from mail-wr0-f195.google.com ([209.85.128.195]:36670 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753334AbeD3QSy (ORCPT ); Mon, 30 Apr 2018 12:18:54 -0400 Received: by mail-wr0-f195.google.com with SMTP id u18-v6so8574831wrg.3 for ; Mon, 30 Apr 2018 09:18:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Pe63cUNr579Ty2lgL4Kr7lgKquOcfir69hHphKUp3og=; b=RE6ONQZF0pP8QpAPrgRqb4KoTtO6kizLEyxLmSGlmCELz8y3vFjrkAAbCMOUl3iXLC 5nwNgDS1fnaR1aJDYeKkL1npdoXaXUYXmi+1zCyGuajybDooSYocH8td5VONULIu0mZ0 WZufUtgcBvyZDZvjc2LU/hpvseBHFqGUn5+jM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Pe63cUNr579Ty2lgL4Kr7lgKquOcfir69hHphKUp3og=; b=UWKaE9Fc2N99YX7ia3aMmlmrbrabHZtx3jXlH8tsDhFmLi8+ZbkzEkxzl+k60VB9ap Kg+ECjOt8+raTB7z0FwEqj2nKt4IUI9R+5vOLe6V4sItompIkTLu4gYzDfBKy3fvbghN g8Dc02ZAwXbCg5RLedxLTtJWzM08xtKrm8D69xvkUugxzN6XR87zSpQVm30MEg0DNnUi 4b4feKWlhLV+CjtwRfwubL0qTSilNEFx2icdxnBUcpD8MuPB45YFFsjLjRBaRm8rHKOD HW/cEyA0au3MO0Qa1QePzSkCS3ojYdoU8ijbU+L60yD3YtOCLVj9PQfYzYic8EmyZ80B 6mDg== X-Gm-Message-State: ALQs6tCeCfNb2gXkdts3nGm/mEn55WCHB5KlZHdwSLSGtbT3z5kRlvL4 k9lWan1rlGCFvke6gpn1t4QvpoBFMbE= X-Received: by 2002:adf:82c4:: with SMTP id 62-v6mr10091218wrc.273.1525105132791; Mon, 30 Apr 2018 09:18:52 -0700 (PDT) Received: from localhost.localdomain ([2a01:e35:3995:5470:200:1aff:fe1b:b328]) by smtp.gmail.com with ESMTPSA id l1-v6sm5753845wre.54.2018.04.30.09.18.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Apr 2018 09:18:52 -0700 (PDT) From: Ard Biesheuvel To: linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au Cc: linux-arm-kernel@lists.infradead.org, dave.martin@arm.com, will.deacon@arm.com, Ard Biesheuvel Subject: [PATCH resend 05/10] crypto: arm64/aes-bs - yield NEON after every block of input Date: Mon, 30 Apr 2018 18:18:25 +0200 Message-Id: <20180430161830.14892-6-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180430161830.14892-1-ard.biesheuvel@linaro.org> References: <20180430161830.14892-1-ard.biesheuvel@linaro.org> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Avoid excessive scheduling delays under a preemptible kernel by yielding the NEON after every block of input. Signed-off-by: Ard Biesheuvel --- arch/arm64/crypto/aes-neonbs-core.S | 305 +++++++++++--------- 1 file changed, 170 insertions(+), 135 deletions(-) -- 2.17.0 diff --git a/arch/arm64/crypto/aes-neonbs-core.S b/arch/arm64/crypto/aes-neonbs-core.S index ca0472500433..e613a87f8b53 100644 --- a/arch/arm64/crypto/aes-neonbs-core.S +++ b/arch/arm64/crypto/aes-neonbs-core.S @@ -565,54 +565,61 @@ ENDPROC(aesbs_decrypt8) * int blocks) */ .macro __ecb_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7 - stp x29, x30, [sp, #-16]! - mov x29, sp + frame_push 5 + + mov x19, x0 + mov x20, x1 + mov x21, x2 + mov x22, x3 + mov x23, x4 99: mov x5, #1 - lsl x5, x5, x4 - subs w4, w4, #8 - csel x4, x4, xzr, pl + lsl x5, x5, x23 + subs w23, w23, #8 + csel x23, x23, xzr, pl csel x5, x5, xzr, mi - ld1 {v0.16b}, [x1], #16 + ld1 {v0.16b}, [x20], #16 tbnz x5, #1, 0f - ld1 {v1.16b}, [x1], #16 + ld1 {v1.16b}, [x20], #16 tbnz x5, #2, 0f - ld1 {v2.16b}, [x1], #16 + ld1 {v2.16b}, [x20], #16 tbnz x5, #3, 0f - ld1 {v3.16b}, [x1], #16 + ld1 {v3.16b}, [x20], #16 tbnz x5, #4, 0f - ld1 {v4.16b}, [x1], #16 + ld1 {v4.16b}, [x20], #16 tbnz x5, #5, 0f - ld1 {v5.16b}, [x1], #16 + ld1 {v5.16b}, [x20], #16 tbnz x5, #6, 0f - ld1 {v6.16b}, [x1], #16 + ld1 {v6.16b}, [x20], #16 tbnz x5, #7, 0f - ld1 {v7.16b}, [x1], #16 + ld1 {v7.16b}, [x20], #16 -0: mov bskey, x2 - mov rounds, x3 +0: mov bskey, x21 + mov rounds, x22 bl \do8 - st1 {\o0\().16b}, [x0], #16 + st1 {\o0\().16b}, [x19], #16 tbnz x5, #1, 1f - st1 {\o1\().16b}, [x0], #16 + st1 {\o1\().16b}, [x19], #16 tbnz x5, #2, 1f - st1 {\o2\().16b}, [x0], #16 + st1 {\o2\().16b}, [x19], #16 tbnz x5, #3, 1f - st1 {\o3\().16b}, [x0], #16 + st1 {\o3\().16b}, [x19], #16 tbnz x5, #4, 1f - st1 {\o4\().16b}, [x0], #16 + st1 {\o4\().16b}, [x19], #16 tbnz x5, #5, 1f - st1 {\o5\().16b}, [x0], #16 + st1 {\o5\().16b}, [x19], #16 tbnz x5, #6, 1f - st1 {\o6\().16b}, [x0], #16 + st1 {\o6\().16b}, [x19], #16 tbnz x5, #7, 1f - st1 {\o7\().16b}, [x0], #16 + st1 {\o7\().16b}, [x19], #16 - cbnz x4, 99b + cbz x23, 1f + cond_yield_neon + b 99b -1: ldp x29, x30, [sp], #16 +1: frame_pop ret .endm @@ -632,43 +639,49 @@ ENDPROC(aesbs_ecb_decrypt) */ .align 4 ENTRY(aesbs_cbc_decrypt) - stp x29, x30, [sp, #-16]! - mov x29, sp + frame_push 6 + + mov x19, x0 + mov x20, x1 + mov x21, x2 + mov x22, x3 + mov x23, x4 + mov x24, x5 99: mov x6, #1 - lsl x6, x6, x4 - subs w4, w4, #8 - csel x4, x4, xzr, pl + lsl x6, x6, x23 + subs w23, w23, #8 + csel x23, x23, xzr, pl csel x6, x6, xzr, mi - ld1 {v0.16b}, [x1], #16 + ld1 {v0.16b}, [x20], #16 mov v25.16b, v0.16b tbnz x6, #1, 0f - ld1 {v1.16b}, [x1], #16 + ld1 {v1.16b}, [x20], #16 mov v26.16b, v1.16b tbnz x6, #2, 0f - ld1 {v2.16b}, [x1], #16 + ld1 {v2.16b}, [x20], #16 mov v27.16b, v2.16b tbnz x6, #3, 0f - ld1 {v3.16b}, [x1], #16 + ld1 {v3.16b}, [x20], #16 mov v28.16b, v3.16b tbnz x6, #4, 0f - ld1 {v4.16b}, [x1], #16 + ld1 {v4.16b}, [x20], #16 mov v29.16b, v4.16b tbnz x6, #5, 0f - ld1 {v5.16b}, [x1], #16 + ld1 {v5.16b}, [x20], #16 mov v30.16b, v5.16b tbnz x6, #6, 0f - ld1 {v6.16b}, [x1], #16 + ld1 {v6.16b}, [x20], #16 mov v31.16b, v6.16b tbnz x6, #7, 0f - ld1 {v7.16b}, [x1] + ld1 {v7.16b}, [x20] -0: mov bskey, x2 - mov rounds, x3 +0: mov bskey, x21 + mov rounds, x22 bl aesbs_decrypt8 - ld1 {v24.16b}, [x5] // load IV + ld1 {v24.16b}, [x24] // load IV eor v1.16b, v1.16b, v25.16b eor v6.16b, v6.16b, v26.16b @@ -679,34 +692,36 @@ ENTRY(aesbs_cbc_decrypt) eor v3.16b, v3.16b, v30.16b eor v5.16b, v5.16b, v31.16b - st1 {v0.16b}, [x0], #16 + st1 {v0.16b}, [x19], #16 mov v24.16b, v25.16b tbnz x6, #1, 1f - st1 {v1.16b}, [x0], #16 + st1 {v1.16b}, [x19], #16 mov v24.16b, v26.16b tbnz x6, #2, 1f - st1 {v6.16b}, [x0], #16 + st1 {v6.16b}, [x19], #16 mov v24.16b, v27.16b tbnz x6, #3, 1f - st1 {v4.16b}, [x0], #16 + st1 {v4.16b}, [x19], #16 mov v24.16b, v28.16b tbnz x6, #4, 1f - st1 {v2.16b}, [x0], #16 + st1 {v2.16b}, [x19], #16 mov v24.16b, v29.16b tbnz x6, #5, 1f - st1 {v7.16b}, [x0], #16 + st1 {v7.16b}, [x19], #16 mov v24.16b, v30.16b tbnz x6, #6, 1f - st1 {v3.16b}, [x0], #16 + st1 {v3.16b}, [x19], #16 mov v24.16b, v31.16b tbnz x6, #7, 1f - ld1 {v24.16b}, [x1], #16 - st1 {v5.16b}, [x0], #16 -1: st1 {v24.16b}, [x5] // store IV + ld1 {v24.16b}, [x20], #16 + st1 {v5.16b}, [x19], #16 +1: st1 {v24.16b}, [x24] // store IV - cbnz x4, 99b + cbz x23, 2f + cond_yield_neon + b 99b - ldp x29, x30, [sp], #16 +2: frame_pop ret ENDPROC(aesbs_cbc_decrypt) @@ -731,87 +746,93 @@ CPU_BE( .quad 0x87, 1 ) */ __xts_crypt8: mov x6, #1 - lsl x6, x6, x4 - subs w4, w4, #8 - csel x4, x4, xzr, pl + lsl x6, x6, x23 + subs w23, w23, #8 + csel x23, x23, xzr, pl csel x6, x6, xzr, mi - ld1 {v0.16b}, [x1], #16 + ld1 {v0.16b}, [x20], #16 next_tweak v26, v25, v30, v31 eor v0.16b, v0.16b, v25.16b tbnz x6, #1, 0f - ld1 {v1.16b}, [x1], #16 + ld1 {v1.16b}, [x20], #16 next_tweak v27, v26, v30, v31 eor v1.16b, v1.16b, v26.16b tbnz x6, #2, 0f - ld1 {v2.16b}, [x1], #16 + ld1 {v2.16b}, [x20], #16 next_tweak v28, v27, v30, v31 eor v2.16b, v2.16b, v27.16b tbnz x6, #3, 0f - ld1 {v3.16b}, [x1], #16 + ld1 {v3.16b}, [x20], #16 next_tweak v29, v28, v30, v31 eor v3.16b, v3.16b, v28.16b tbnz x6, #4, 0f - ld1 {v4.16b}, [x1], #16 - str q29, [sp, #16] + ld1 {v4.16b}, [x20], #16 + str q29, [sp, #.Lframe_local_offset] eor v4.16b, v4.16b, v29.16b next_tweak v29, v29, v30, v31 tbnz x6, #5, 0f - ld1 {v5.16b}, [x1], #16 - str q29, [sp, #32] + ld1 {v5.16b}, [x20], #16 + str q29, [sp, #.Lframe_local_offset + 16] eor v5.16b, v5.16b, v29.16b next_tweak v29, v29, v30, v31 tbnz x6, #6, 0f - ld1 {v6.16b}, [x1], #16 - str q29, [sp, #48] + ld1 {v6.16b}, [x20], #16 + str q29, [sp, #.Lframe_local_offset + 32] eor v6.16b, v6.16b, v29.16b next_tweak v29, v29, v30, v31 tbnz x6, #7, 0f - ld1 {v7.16b}, [x1], #16 - str q29, [sp, #64] + ld1 {v7.16b}, [x20], #16 + str q29, [sp, #.Lframe_local_offset + 48] eor v7.16b, v7.16b, v29.16b next_tweak v29, v29, v30, v31 -0: mov bskey, x2 - mov rounds, x3 +0: mov bskey, x21 + mov rounds, x22 br x7 ENDPROC(__xts_crypt8) .macro __xts_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7 - stp x29, x30, [sp, #-80]! - mov x29, sp + frame_push 6, 64 - ldr q30, .Lxts_mul_x - ld1 {v25.16b}, [x5] + mov x19, x0 + mov x20, x1 + mov x21, x2 + mov x22, x3 + mov x23, x4 + mov x24, x5 + +0: ldr q30, .Lxts_mul_x + ld1 {v25.16b}, [x24] 99: adr x7, \do8 bl __xts_crypt8 - ldp q16, q17, [sp, #16] - ldp q18, q19, [sp, #48] + ldp q16, q17, [sp, #.Lframe_local_offset] + ldp q18, q19, [sp, #.Lframe_local_offset + 32] eor \o0\().16b, \o0\().16b, v25.16b eor \o1\().16b, \o1\().16b, v26.16b eor \o2\().16b, \o2\().16b, v27.16b eor \o3\().16b, \o3\().16b, v28.16b - st1 {\o0\().16b}, [x0], #16 + st1 {\o0\().16b}, [x19], #16 mov v25.16b, v26.16b tbnz x6, #1, 1f - st1 {\o1\().16b}, [x0], #16 + st1 {\o1\().16b}, [x19], #16 mov v25.16b, v27.16b tbnz x6, #2, 1f - st1 {\o2\().16b}, [x0], #16 + st1 {\o2\().16b}, [x19], #16 mov v25.16b, v28.16b tbnz x6, #3, 1f - st1 {\o3\().16b}, [x0], #16 + st1 {\o3\().16b}, [x19], #16 mov v25.16b, v29.16b tbnz x6, #4, 1f @@ -820,18 +841,22 @@ ENDPROC(__xts_crypt8) eor \o6\().16b, \o6\().16b, v18.16b eor \o7\().16b, \o7\().16b, v19.16b - st1 {\o4\().16b}, [x0], #16 + st1 {\o4\().16b}, [x19], #16 tbnz x6, #5, 1f - st1 {\o5\().16b}, [x0], #16 + st1 {\o5\().16b}, [x19], #16 tbnz x6, #6, 1f - st1 {\o6\().16b}, [x0], #16 + st1 {\o6\().16b}, [x19], #16 tbnz x6, #7, 1f - st1 {\o7\().16b}, [x0], #16 + st1 {\o7\().16b}, [x19], #16 + + cbz x23, 1f + st1 {v25.16b}, [x24] - cbnz x4, 99b + cond_yield_neon 0b + b 99b -1: st1 {v25.16b}, [x5] - ldp x29, x30, [sp], #80 +1: st1 {v25.16b}, [x24] + frame_pop ret .endm @@ -856,24 +881,31 @@ ENDPROC(aesbs_xts_decrypt) * int rounds, int blocks, u8 iv[], u8 final[]) */ ENTRY(aesbs_ctr_encrypt) - stp x29, x30, [sp, #-16]! - mov x29, sp - - cmp x6, #0 - cset x10, ne - add x4, x4, x10 // do one extra block if final - - ldp x7, x8, [x5] - ld1 {v0.16b}, [x5] + frame_push 8 + + mov x19, x0 + mov x20, x1 + mov x21, x2 + mov x22, x3 + mov x23, x4 + mov x24, x5 + mov x25, x6 + + cmp x25, #0 + cset x26, ne + add x23, x23, x26 // do one extra block if final + +98: ldp x7, x8, [x24] + ld1 {v0.16b}, [x24] CPU_LE( rev x7, x7 ) CPU_LE( rev x8, x8 ) adds x8, x8, #1 adc x7, x7, xzr 99: mov x9, #1 - lsl x9, x9, x4 - subs w4, w4, #8 - csel x4, x4, xzr, pl + lsl x9, x9, x23 + subs w23, w23, #8 + csel x23, x23, xzr, pl csel x9, x9, xzr, le tbnz x9, #1, 0f @@ -891,82 +923,85 @@ CPU_LE( rev x8, x8 ) tbnz x9, #7, 0f next_ctr v7 -0: mov bskey, x2 - mov rounds, x3 +0: mov bskey, x21 + mov rounds, x22 bl aesbs_encrypt8 - lsr x9, x9, x10 // disregard the extra block + lsr x9, x9, x26 // disregard the extra block tbnz x9, #0, 0f - ld1 {v8.16b}, [x1], #16 + 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 + + cond_yield_neon 98b + b 99b -0: st1 {v0.16b}, [x5] - ldp x29, x30, [sp], #16 +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)