From patchwork Wed Sep 16 01:34:08 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Ellerman X-Patchwork-Id: 7190261 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E9FDA9F336 for ; Wed, 16 Sep 2015 01:34:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D7579207D2 for ; Wed, 16 Sep 2015 01:34:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 92352207E1 for ; Wed, 16 Sep 2015 01:34:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752023AbbIPBeX (ORCPT ); Tue, 15 Sep 2015 21:34:23 -0400 Received: from ozlabs.org ([103.22.144.67]:47738 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751480AbbIPBeX (ORCPT ); Tue, 15 Sep 2015 21:34:23 -0400 Received: by ozlabs.org (Postfix, from userid 1034) id 921B51401B5; Wed, 16 Sep 2015 11:34:21 +1000 (AEST) From: Michael Ellerman To: stable@vger.kernel.org Cc: , linux-crypto@vger.kernel.org, Leonidas Da Silva Barbosa , Herbert Xu Subject: [PATCH stable 2/2] crypto: vmx - Adding enable_kernel_vsx() to access VSX instructions Date: Wed, 16 Sep 2015 11:34:08 +1000 Message-Id: <1442367251-9319-2-git-send-email-mpe@ellerman.id.au> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1442367251-9319-1-git-send-email-mpe@ellerman.id.au> References: <1442367251-9319-1-git-send-email-mpe@ellerman.id.au> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Leonidas Da Silva Barbosa commit 2d6f0600b2cd755959527230ef5a6fba97bb762a upstream. vmx-crypto driver make use of some VSX instructions which are only available if VSX is enabled. Running in cases where VSX are not enabled vmx-crypto fails in a VSX exception. In order to fix this enable_kernel_vsx() was added to turn on VSX instructions for vmx-crypto. Signed-off-by: Leonidas S. Barbosa Signed-off-by: Herbert Xu Fixes: 8676590a1593 ("crypto: vmx - Adding AES routines for VMX module") Cc: stable@vger.kernel.org # 4.2 Signed-off-by: Michael Ellerman --- drivers/crypto/vmx/aes.c | 3 +++ drivers/crypto/vmx/aes_cbc.c | 3 +++ drivers/crypto/vmx/aes_ctr.c | 3 +++ drivers/crypto/vmx/ghash.c | 4 ++++ 4 files changed, 13 insertions(+) This fixes a kernel crash at boot. diff --git a/drivers/crypto/vmx/aes.c b/drivers/crypto/vmx/aes.c index e79e567e43aa..263af709e536 100644 --- a/drivers/crypto/vmx/aes.c +++ b/drivers/crypto/vmx/aes.c @@ -84,6 +84,7 @@ static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key); ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key); pagefault_enable(); @@ -103,6 +104,7 @@ static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); aes_p8_encrypt(src, dst, &ctx->enc_key); pagefault_enable(); preempt_enable(); @@ -119,6 +121,7 @@ static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); aes_p8_decrypt(src, dst, &ctx->dec_key); pagefault_enable(); preempt_enable(); diff --git a/drivers/crypto/vmx/aes_cbc.c b/drivers/crypto/vmx/aes_cbc.c index 7299995c78ec..0b8fe2ec5315 100644 --- a/drivers/crypto/vmx/aes_cbc.c +++ b/drivers/crypto/vmx/aes_cbc.c @@ -85,6 +85,7 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key); ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key); pagefault_enable(); @@ -115,6 +116,7 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); blkcipher_walk_init(&walk, dst, src, nbytes); ret = blkcipher_walk_virt(desc, &walk); @@ -155,6 +157,7 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); blkcipher_walk_init(&walk, dst, src, nbytes); ret = blkcipher_walk_virt(desc, &walk); diff --git a/drivers/crypto/vmx/aes_ctr.c b/drivers/crypto/vmx/aes_ctr.c index 7adae42a7b79..1e754ae4e850 100644 --- a/drivers/crypto/vmx/aes_ctr.c +++ b/drivers/crypto/vmx/aes_ctr.c @@ -82,6 +82,7 @@ static int p8_aes_ctr_setkey(struct crypto_tfm *tfm, const u8 *key, pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key); pagefault_enable(); @@ -100,6 +101,7 @@ static void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx, pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); aes_p8_encrypt(ctrblk, keystream, &ctx->enc_key); pagefault_enable(); @@ -131,6 +133,7 @@ static int p8_aes_ctr_crypt(struct blkcipher_desc *desc, while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr, walk.dst.virt.addr, (nbytes & diff --git a/drivers/crypto/vmx/ghash.c b/drivers/crypto/vmx/ghash.c index b5e29002b666..2183a2e77641 100644 --- a/drivers/crypto/vmx/ghash.c +++ b/drivers/crypto/vmx/ghash.c @@ -119,6 +119,7 @@ static int p8_ghash_setkey(struct crypto_shash *tfm, const u8 *key, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); enable_kernel_fp(); gcm_init_p8(ctx->htable, (const u64 *) key); pagefault_enable(); @@ -149,6 +150,7 @@ static int p8_ghash_update(struct shash_desc *desc, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); enable_kernel_fp(); gcm_ghash_p8(dctx->shash, ctx->htable, dctx->buffer, GHASH_DIGEST_SIZE); @@ -163,6 +165,7 @@ static int p8_ghash_update(struct shash_desc *desc, preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); enable_kernel_fp(); gcm_ghash_p8(dctx->shash, ctx->htable, src, len); pagefault_enable(); @@ -193,6 +196,7 @@ static int p8_ghash_final(struct shash_desc *desc, u8 *out) preempt_disable(); pagefault_disable(); enable_kernel_altivec(); + enable_kernel_vsx(); enable_kernel_fp(); gcm_ghash_p8(dctx->shash, ctx->htable, dctx->buffer, GHASH_DIGEST_SIZE);