From patchwork Thu Feb 6 01:20:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eneas U de Queiroz X-Patchwork-Id: 11367461 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E43781820 for ; Thu, 6 Feb 2020 01:21:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C31B420838 for ; Thu, 6 Feb 2020 01:21:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nNbHC8rb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727541AbgBFBVO (ORCPT ); Wed, 5 Feb 2020 20:21:14 -0500 Received: from mail-qv1-f68.google.com ([209.85.219.68]:43743 "EHLO mail-qv1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727415AbgBFBVO (ORCPT ); Wed, 5 Feb 2020 20:21:14 -0500 Received: by mail-qv1-f68.google.com with SMTP id p2so2092697qvo.10 for ; Wed, 05 Feb 2020 17:21:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=oFkkNUdzzqqQ4BTE/G04D5Na0zNjD/ys0WvHWqp3S+E=; b=nNbHC8rbkXPC7vISXtiMpMF84W43tHt1qrovbjw0GGckFfu0BURiHuP7jVAQkqRKnT HEQ+uYgS1XqpD2ybyX6Y8G8/nskG0yHbw41iOQtTPCZ8gId+ZF8x1c31+TQOZ783ays4 jiiAHlCKUcZMIEh4F5lsHrPfdllX8ZTYNWdXHXLctoCR/tbmVgk/0SNJ//3CFGQYwm6l KE1rtZcgdCOE2lOxlejk4NjIm7ksy/3zv6ybGmt4LZ+eJcoJOxKamBfTOayXrAqgLnnf kFJXBtarlP7FUZtmwBU2KxSMURRHJoowBJEgUtDP8ZbtWYjS1sb2/1w9tbn6FA2zRMyr yGmw== 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:mime-version:content-transfer-encoding; bh=oFkkNUdzzqqQ4BTE/G04D5Na0zNjD/ys0WvHWqp3S+E=; b=Q/HuNM58mvG1CFjV68hqBV2eIHenMX0C77mMwkK7diW1oxptxm8lkNWaX10+27uHMi iz2m0jNe/HhBkWHV+T0i7+3BKFQwiMBGhc2ce7/3mMy2M0lkqcLamY57tBJ1mPBfCevD kIP73fQcYcW+9pYi6Ed3dcHA4AdcZyJ0PwsSbVmL8x3CD/oYcVNTuw5kGCI1FICDdWM1 jCMKEOefiVdESR32/4K3BFRc+ArK3K6q5Jzn3SdP5evLXtAWNYwmAbpbsSxtkHNSg/Pg c6QjbbdftZ80viwwKrmEpCRVIClcsQwslH6ISJ3TEF+GkayRAxdf99bOeCJZ9707JeS5 dBTw== X-Gm-Message-State: APjAAAXi4fpd7rGH2Hbx5D1QNGYFxx0ZfFH5RglQbxHAPR/zi0emMHy4 0nNCqUe0uM7oBTpqNSokVcIGGgbB X-Google-Smtp-Source: APXvYqzilE6Ptxx9uZJJxzYQDb6Uw+R1zGmum/bzC3zx64XdIR8XkLSY0UnWc8rc70zK+h08sNOQXg== X-Received: by 2002:a05:6214:17cd:: with SMTP id cu13mr407550qvb.192.1580952072740; Wed, 05 Feb 2020 17:21:12 -0800 (PST) Received: from gateway.troianet.com.br (ipv6.troianet.com.br. [2804:688:21:4::2]) by smtp.gmail.com with ESMTPSA id c18sm719729qkk.5.2020.02.05.17.21.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Feb 2020 17:21:12 -0800 (PST) From: Eneas U de Queiroz To: linux-crypto@vger.kernel.org, Herbert Xu , "David S. Miller" Cc: Ard Biesheuvel , Eneas U de Queiroz Subject: [PATCH v2 1/3] crypto: qce - use cryptlen when adding extra sgl Date: Wed, 5 Feb 2020 22:20:34 -0300 Message-Id: <20200206012036.25614-2-cotequeiroz@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200206012036.25614-1-cotequeiroz@gmail.com> References: <20200203165334.6185-1-cotequeiroz@gmail.com> <20200206012036.25614-1-cotequeiroz@gmail.com> MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org The qce crypto driver appends an extra entry to the dst sgl, to maintain private state information. When the gcm driver sends requests to the ctr skcipher, it passes the authentication tag after the actual crypto payload, but it must not be touched. Commit 1336c2221bee ("crypto: qce - save a sg table slot for result buf") limited the destination sgl to avoid overwriting the authentication tag but it assumed the tag would be in a separate sgl entry. This is not always the case, so it is better to limit the length of the destination buffer to req->cryptlen before appending the result buf. Signed-off-by: Eneas U de Queiroz diff --git a/drivers/crypto/qce/dma.c b/drivers/crypto/qce/dma.c index 7da893dc00e7..46db5bf366b4 100644 --- a/drivers/crypto/qce/dma.c +++ b/drivers/crypto/qce/dma.c @@ -48,9 +48,10 @@ void qce_dma_release(struct qce_dma_data *dma) struct scatterlist * qce_sgtable_add(struct sg_table *sgt, struct scatterlist *new_sgl, - int max_ents) + unsigned int max_len) { struct scatterlist *sg = sgt->sgl, *sg_last = NULL; + unsigned int new_len; while (sg) { if (!sg_page(sg)) @@ -61,13 +62,13 @@ qce_sgtable_add(struct sg_table *sgt, struct scatterlist *new_sgl, if (!sg) return ERR_PTR(-EINVAL); - while (new_sgl && sg && max_ents) { - sg_set_page(sg, sg_page(new_sgl), new_sgl->length, - new_sgl->offset); + while (new_sgl && sg && max_len) { + new_len = new_sgl->length > max_len ? max_len : new_sgl->length; + sg_set_page(sg, sg_page(new_sgl), new_len, new_sgl->offset); sg_last = sg; sg = sg_next(sg); new_sgl = sg_next(new_sgl); - max_ents--; + max_len -= new_len; } return sg_last; diff --git a/drivers/crypto/qce/dma.h b/drivers/crypto/qce/dma.h index ed25a0d9829e..786402169360 100644 --- a/drivers/crypto/qce/dma.h +++ b/drivers/crypto/qce/dma.h @@ -43,6 +43,6 @@ void qce_dma_issue_pending(struct qce_dma_data *dma); int qce_dma_terminate_all(struct qce_dma_data *dma); struct scatterlist * qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add, - int max_ents); + unsigned int max_len); #endif /* _DMA_H_ */ diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c index 4217b745f124..63ae75809cb7 100644 --- a/drivers/crypto/qce/skcipher.c +++ b/drivers/crypto/qce/skcipher.c @@ -97,13 +97,14 @@ qce_skcipher_async_req_handle(struct crypto_async_request *async_req) sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ); - sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, rctx->dst_nents - 1); + sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, req->cryptlen); if (IS_ERR(sg)) { ret = PTR_ERR(sg); goto error_free; } - sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg, 1); + sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg, + QCE_RESULT_BUF_SZ); if (IS_ERR(sg)) { ret = PTR_ERR(sg); goto error_free; From patchwork Thu Feb 6 01:20:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eneas U de Queiroz X-Patchwork-Id: 11367465 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 98DB2112B for ; Thu, 6 Feb 2020 01:21:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DF4520838 for ; Thu, 6 Feb 2020 01:21:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PH+MhRUg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727415AbgBFBVR (ORCPT ); Wed, 5 Feb 2020 20:21:17 -0500 Received: from mail-qt1-f194.google.com ([209.85.160.194]:43904 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727170AbgBFBVQ (ORCPT ); Wed, 5 Feb 2020 20:21:16 -0500 Received: by mail-qt1-f194.google.com with SMTP id d18so3223219qtj.10 for ; Wed, 05 Feb 2020 17:21:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=m9EEloNQL6eZ3dm91bJ9GK6LSsi6Ei6R6xgKjvhZ/fg=; b=PH+MhRUg4SpXTAVHjTDnJGaiGNnOivSq0kOv2J4x46mYknS+BNueX8vC4YmmsHcpXe uRAgAoVILZ/HOy6fvup5LjMWTzcmUMqZFnxBArc55xX0QcURDTXGM+bGYz4SF6wSvajU IY/9ui3wV8lkamZg2yxz9j2uilLnPZn01tykcacppipNXzXTDFl99u372FLt53iZmLFp 67EYNwoXoebOzaZIEQv/dWoP+C/ofVcw1vdrdLQ+lg+IJNmLEma9myeCo15eFW7LxWL1 JeIHMJ3nyQ/W2kC5CFSzZbbi3kEFgO5qQG82xZLN2OSo1bQyksWtpmZFQjnx5a99tGA/ 6eIA== 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:mime-version:content-transfer-encoding; bh=m9EEloNQL6eZ3dm91bJ9GK6LSsi6Ei6R6xgKjvhZ/fg=; b=H2KhXvEewyjo18b8uKL3DEzN7BKMhFc3/HGEPpr7TbuR/+ZAyl1qrhLpp6b2pFCDw3 Z/L7/Yf2jwUOXQ/Ol4h0VgeWsR4sjvHyGmyemBHmviU/X2LHreMxlt2dl7hRYXjiSeDU 3T33KJZbQmZblYefBN8sGZZKwATSo2xIeBJ82/KFV/Gu4KPJHWxn6ax6PewWxMrY3jm4 mv8ziWYBmoXXf1QoRQ3krFlVDfbKPJEyp+1kF27kpWFNmFSZMT+pzchTGOheCrkEA+6k pWLhv+WQC9nTNt/svOGoYHlDYyjwmc2YrhmwUROHBf7NUpe9U25kwim0pItoT7WWh9gs dMPw== X-Gm-Message-State: APjAAAXKFSYLvcgcsg8lWnEhMgQalrdHAeAsLQXz0P0OCk33SpZwn7J0 ORiiHK0R+bINr4DtJAmqwFrmc2eY X-Google-Smtp-Source: APXvYqyBxbj7mn7KmTYGUKaMuMMGMBq7Paz599jWEL25SGeXSEp6mxiB/6PDX6j64PDbG1itlWjp9g== X-Received: by 2002:ac8:6b98:: with SMTP id z24mr547718qts.392.1580952074932; Wed, 05 Feb 2020 17:21:14 -0800 (PST) Received: from gateway.troianet.com.br (ipv6.troianet.com.br. [2804:688:21:4::2]) by smtp.gmail.com with ESMTPSA id c18sm719729qkk.5.2020.02.05.17.21.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Feb 2020 17:21:14 -0800 (PST) From: Eneas U de Queiroz To: linux-crypto@vger.kernel.org, Herbert Xu , "David S. Miller" Cc: Ard Biesheuvel , Eneas U de Queiroz Subject: [PATCH v2 2/3] crypto: qce - use AES fallback for small requests Date: Wed, 5 Feb 2020 22:20:35 -0300 Message-Id: <20200206012036.25614-3-cotequeiroz@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200206012036.25614-1-cotequeiroz@gmail.com> References: <20200203165334.6185-1-cotequeiroz@gmail.com> <20200206012036.25614-1-cotequeiroz@gmail.com> MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Process small blocks using the fallback cipher, as a workaround for an observed failure (DMA-related, apparently) when computing the GCM ghash key. This brings a speed gain as well, since it avoids the latency of using the hardware engine to process small blocks. Using software for all 16-byte requests would be enough to make GCM work, but to increase performance, a larger threshold would be better. Measuring the performance of supported ciphers with openssl speed, software matches hardware at around 768-1024 bytes. Considering the 256-bit ciphers, software is 2-3 times faster than qce at 256-bytes, 30% faster at 512, and about even at 768-bytes. With 128-bit keys, the break-even point would be around 1024-bytes. This adds the 'aes_sw_max_len' parameter, to set the largest request length processed by the software fallback. Its default is being set to 512 bytes, a little lower than the break-even point, to balance the cost in CPU usage. Signed-off-by: Eneas U de Queiroz crypto: qce - add aes_sw_max_len parameter This adds the AES fallback threshold as a parameter, so it can be changed by the user. Signed-off-by: Eneas U de Queiroz diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index c2767ed54dfe..052d3ff7fb20 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -685,6 +685,29 @@ choice endchoice +config CRYPTO_DEV_QCE_SW_MAX_LEN + int "Default maximum request size to use software for AES" + depends on CRYPTO_DEV_QCE && CRYPTO_DEV_QCE_SKCIPHER + default 512 + help + This sets the default maximum request size to perform AES requests + using software instead of the crypto engine. It can be changed by + setting the aes_sw_max_len parameter. + + Small blocks are processed faster in software than hardware. + Considering the 256-bit ciphers, software is 2-3 times faster than + qce at 256-bytes, 30% faster at 512, and about even at 768-bytes. + With 128-bit keys, the break-even point would be around 1024-bytes. + + The default is set a little lower, to 512 bytes, to balance the + cost in CPU usage. The minimum recommended setting is 16-bytes + (1 AES block), since AES-GCM will fail if you set it lower. + Setting this to zero will send all requests to the hardware. + + Note that 192-bit keys are not supported by the hardware and are + always processed by the software fallback, and all DES requests + are done by the hardware. + config CRYPTO_DEV_QCOM_RNG tristate "Qualcomm Random Number Generator Driver" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c index 63ae75809cb7..a3536495b6b0 100644 --- a/drivers/crypto/qce/skcipher.c +++ b/drivers/crypto/qce/skcipher.c @@ -5,6 +5,7 @@ #include #include +#include #include #include #include @@ -12,6 +13,13 @@ #include "cipher.h" +unsigned int aes_sw_max_len = CONFIG_CRYPTO_DEV_QCE_SW_MAX_LEN; +module_param(aes_sw_max_len, uint, 0644); +MODULE_PARM_DESC(aes_sw_max_len, + "Only use hardware for AES requests larger than this " + "[0=always use hardware; anything <16 breaks AES-GCM; default=" + __stringify(CONFIG_CRYPTO_DEV_QCE_SOFT_THRESHOLD)"]"); + static LIST_HEAD(skcipher_algs); static void qce_skcipher_done(void *data) @@ -166,15 +174,10 @@ static int qce_skcipher_setkey(struct crypto_skcipher *ablk, const u8 *key, switch (IS_XTS(flags) ? keylen >> 1 : keylen) { case AES_KEYSIZE_128: case AES_KEYSIZE_256: + memcpy(ctx->enc_key, key, keylen); break; - default: - goto fallback; } - ctx->enc_keylen = keylen; - memcpy(ctx->enc_key, key, keylen); - return 0; -fallback: ret = crypto_sync_skcipher_setkey(ctx->fallback, key, keylen); if (!ret) ctx->enc_keylen = keylen; @@ -224,8 +227,9 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt) rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT; keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen; - if (IS_AES(rctx->flags) && keylen != AES_KEYSIZE_128 && - keylen != AES_KEYSIZE_256) { + if (IS_AES(rctx->flags) && + ((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) + || req->cryptlen <= aes_sw_max_len)) { SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback); skcipher_request_set_sync_tfm(subreq, ctx->fallback); From patchwork Thu Feb 6 01:20:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eneas U de Queiroz X-Patchwork-Id: 11367467 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 16DA1112B for ; Thu, 6 Feb 2020 01:21:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E94FE20730 for ; Thu, 6 Feb 2020 01:21:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Yzoy27x5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727550AbgBFBVS (ORCPT ); Wed, 5 Feb 2020 20:21:18 -0500 Received: from mail-qv1-f66.google.com ([209.85.219.66]:33443 "EHLO mail-qv1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727170AbgBFBVS (ORCPT ); Wed, 5 Feb 2020 20:21:18 -0500 Received: by mail-qv1-f66.google.com with SMTP id z3so2125605qvn.0 for ; Wed, 05 Feb 2020 17:21:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7/1ESwDUhgAeafD/n9eQRw0vfxop8NhHhhipL993I18=; b=Yzoy27x5oB7SlIsr9zJTlbGsD97xzfzNH7pWz7xHtEFlg93rge+hgbp1jmkCqZtyzc SMp6dzgWH7I82GRt4CN28BTxdAaMlTVkk+AwEz5JLZuX07jzz9GR1i0uJGvRGsS3u1KE f31tya7JTg+VWh7MAsYQ4Ka97exDPjO13KphLT0bem3I/UD5Y7I/YCsisT255+j59yoY TNrA+EPYc9yg4lXQS73GuUPeImnS1qGr/DxFHrmooEEFTjv3K5P5hiSISKl9K+nQhHxK f6ysZMpUOSO6JjVs3hrszpg6HxLBR9N0zctHGZKhqt4nQ9UEeigBow8Ok2ZhCpE/IR2f Z4QQ== 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:mime-version:content-transfer-encoding; bh=7/1ESwDUhgAeafD/n9eQRw0vfxop8NhHhhipL993I18=; b=XhRLWwTQv9U9hK7SFEziq4/tW+R5naUTNM9/P80F9bQmuFX2fbM1VI2HehfacxzAH2 WO0AGpzy3ls/UG7qZMUByOB0ujgj1oKoGB8Lt3dub/CJn54ZJ8SHuQaOLNMlig4WpiSx Uz06Z0e4Q/8PwFt3+fzmipJSewzRlXoiIYnJj1H+QuWXae4TzReC/D8HW4Hv0yfftrcx pPUGUuwcaDGj44jC6XW5OfNejUpOEASegusjgSYX/dgA4qjifnTFK0IcT2auI6xmwU4o xZAxRTY2XyVVDQ4Kr7pgSjLWpvFo+UaiMTxGSMr8EeyypdsMSEZV5KJBEy0XnJhAXuB5 WK0Q== X-Gm-Message-State: APjAAAUfxnvPc6gp05wYQn/0krAjykMne9Zj8mx9t82lPdZk+knXVsFf YUn5nVP7sWEF94+O9xVyYtXNlcAT X-Google-Smtp-Source: APXvYqzL8nfOo4sTh2ApTRJEul1egqV3793D2YGxn98hRolmj2RJGr+YYwVP1zsw9FJAfGHg4RK6/g== X-Received: by 2002:ad4:464e:: with SMTP id y14mr401993qvv.143.1580952077117; Wed, 05 Feb 2020 17:21:17 -0800 (PST) Received: from gateway.troianet.com.br (ipv6.troianet.com.br. [2804:688:21:4::2]) by smtp.gmail.com with ESMTPSA id c18sm719729qkk.5.2020.02.05.17.21.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Feb 2020 17:21:16 -0800 (PST) From: Eneas U de Queiroz To: linux-crypto@vger.kernel.org, Herbert Xu , "David S. Miller" Cc: Ard Biesheuvel , Eneas U de Queiroz Subject: [PATCH v2 3/3] crypto: qce - handle AES-XTS cases that qce fails Date: Wed, 5 Feb 2020 22:20:36 -0300 Message-Id: <20200206012036.25614-4-cotequeiroz@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200206012036.25614-1-cotequeiroz@gmail.com> References: <20200203165334.6185-1-cotequeiroz@gmail.com> <20200206012036.25614-1-cotequeiroz@gmail.com> MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org QCE hangs when presented with an AES-XTS request whose length is larger than QCE_SECTOR_SIZE (512-bytes), and is not a multiple of it. Let the fallback cipher handle them. Signed-off-by: Eneas U de Queiroz Reported-by: kbuild test robot diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c index 629e7f34dc09..5006e74c40cd 100644 --- a/drivers/crypto/qce/common.c +++ b/drivers/crypto/qce/common.c @@ -15,8 +15,6 @@ #include "regs-v5.h" #include "sha.h" -#define QCE_SECTOR_SIZE 512 - static inline u32 qce_read(struct qce_device *qce, u32 offset) { return readl(qce->base + offset); diff --git a/drivers/crypto/qce/common.h b/drivers/crypto/qce/common.h index 282d4317470d..9f989cba0f1b 100644 --- a/drivers/crypto/qce/common.h +++ b/drivers/crypto/qce/common.h @@ -12,6 +12,9 @@ #include #include +/* xts du size */ +#define QCE_SECTOR_SIZE 512 + /* key size in bytes */ #define QCE_SHA_HMAC_KEY_SIZE 64 #define QCE_MAX_CIPHER_KEY_SIZE AES_KEYSIZE_256 diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c index a3536495b6b0..b7c0aaddd7d9 100644 --- a/drivers/crypto/qce/skcipher.c +++ b/drivers/crypto/qce/skcipher.c @@ -227,9 +227,13 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt) rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT; keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen; + /* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and + * is not a multiple of it; pass such requests to the fallback */ if (IS_AES(rctx->flags) && ((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) - || req->cryptlen <= aes_sw_max_len)) { + || req->cryptlen <= aes_sw_max_len) + || (IS_XTS(rctx->flags) && req->cryptlen > QCE_SECTOR_SIZE && + req->cryptlen % QCE_SECTOR_SIZE)) { SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback); skcipher_request_set_sync_tfm(subreq, ctx->fallback);