From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Rostedt Subject: [PATCH 3/5] x86: crypto: Reduce preempt disabled regions Date: Fri, 18 Nov 2011 23:45:13 -0500 Message-ID: <20111119044833.696636681@goodmis.org> References: <20111119044510.811163517@goodmis.org> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="00GvhwF7k39YY" Cc: Thomas Gleixner , Carsten Emde , John Kacur , Peter Zijlstra , stable-rt@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-rt-users Return-path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:51623 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757860Ab1KSEsg (ORCPT ); Fri, 18 Nov 2011 23:48:36 -0500 Content-Disposition: inline; filename=0003-x86-crypto-Reduce-preempt-disabled-regions.patch Sender: linux-rt-users-owner@vger.kernel.org List-ID: --00GvhwF7k39YY Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable From: Peter Zijlstra Restrict the preempt disabled regions to the actual floating point operations and enable preemption for the administrative actions. This is necessary on RT to avoid that kfree and other operations are called with preemption disabled. Reported-and-tested-by: Carsten Emde Signed-off-by: Peter Zijlstra Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner Signed-off-by: Steven Rostedt --- arch/x86/crypto/aesni-intel_glue.c | 24 +++++++++++++----------- 1 files changed, 13 insertions(+), 11 deletions(-) diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-int= el_glue.c index feee8ff..81ec77c 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -288,14 +288,14 @@ static int ecb_encrypt(struct blkcipher_desc *desc, err =3D blkcipher_walk_virt(desc, &walk); desc->flags &=3D ~CRYPTO_TFM_REQ_MAY_SLEEP; =20 - kernel_fpu_begin(); while ((nbytes =3D walk.nbytes)) { + kernel_fpu_begin(); aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, - nbytes & AES_BLOCK_MASK); + nbytes & AES_BLOCK_MASK); + kernel_fpu_end(); nbytes &=3D AES_BLOCK_SIZE - 1; err =3D blkcipher_walk_done(desc, &walk, nbytes); } - kernel_fpu_end(); =20 return err; } @@ -312,14 +312,14 @@ static int ecb_decrypt(struct blkcipher_desc *desc, err =3D blkcipher_walk_virt(desc, &walk); desc->flags &=3D ~CRYPTO_TFM_REQ_MAY_SLEEP; =20 - kernel_fpu_begin(); while ((nbytes =3D walk.nbytes)) { + kernel_fpu_begin(); aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK); + kernel_fpu_end(); nbytes &=3D AES_BLOCK_SIZE - 1; err =3D blkcipher_walk_done(desc, &walk, nbytes); } - kernel_fpu_end(); =20 return err; } @@ -358,14 +358,14 @@ static int cbc_encrypt(struct blkcipher_desc *desc, err =3D blkcipher_walk_virt(desc, &walk); desc->flags &=3D ~CRYPTO_TFM_REQ_MAY_SLEEP; =20 - kernel_fpu_begin(); while ((nbytes =3D walk.nbytes)) { + kernel_fpu_begin(); aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK, walk.iv); + kernel_fpu_end(); nbytes &=3D AES_BLOCK_SIZE - 1; err =3D blkcipher_walk_done(desc, &walk, nbytes); } - kernel_fpu_end(); =20 return err; } @@ -382,14 +382,14 @@ static int cbc_decrypt(struct blkcipher_desc *desc, err =3D blkcipher_walk_virt(desc, &walk); desc->flags &=3D ~CRYPTO_TFM_REQ_MAY_SLEEP; =20 - kernel_fpu_begin(); while ((nbytes =3D walk.nbytes)) { + kernel_fpu_begin(); aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK, walk.iv); + kernel_fpu_end(); nbytes &=3D AES_BLOCK_SIZE - 1; err =3D blkcipher_walk_done(desc, &walk, nbytes); } - kernel_fpu_end(); =20 return err; } @@ -444,18 +444,20 @@ static int ctr_crypt(struct blkcipher_desc *desc, err =3D blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); desc->flags &=3D ~CRYPTO_TFM_REQ_MAY_SLEEP; =20 - kernel_fpu_begin(); while ((nbytes =3D walk.nbytes) >=3D AES_BLOCK_SIZE) { + kernel_fpu_begin(); aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, nbytes & AES_BLOCK_MASK, walk.iv); + kernel_fpu_end(); nbytes &=3D AES_BLOCK_SIZE - 1; err =3D blkcipher_walk_done(desc, &walk, nbytes); } if (walk.nbytes) { + kernel_fpu_begin(); ctr_crypt_final(ctx, &walk); + kernel_fpu_end(); err =3D blkcipher_walk_done(desc, &walk, 0); } - kernel_fpu_end(); =20 return err; } --=20 1.7.7.1 --00GvhwF7k39YY Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJOxzUhAAoJEIy3vGnGbaoAhKsP/3w3pfq7HqF+YzalWvAAu9bG V6paI2BaRZKoicveJGNpszBliV0uTNIkM1ygLWKO7Q5BbHVOENRhPbQw3f1+vSiE viDJS6vner9yoCeMkPw8JMjuH4Yo6cAE02bDPs2Wz5GaTfzpMZAec4suLYAn6nDu +RNKuFKIszTExLvXkTsdk/maaYGit1q6ZzBW3KO1YMHwa1cncVcFaDGwPqTJjwty iTdgtckw44EHdBElqDkBF4iLwU8FA5F3pFOmgwBbEs3ththjyWLyuhjkmwlMz0fI BIs9wYlICNqSxvDQWAd+8qp/AVT8wcwQnwfwUuq3gUvggMOjLLb2R9lTGsCE3zIR iLAOPMCKzs1B9arEiyBw+uQu7/2IzrbZMerNxNsD9JlZREwm5u4Fg52FWq+fuBO1 ZiW3S/yn7rVAIuKZeVSY2xcFO0zKfa1NbaAqIQw3uXvllNeovXfENWombMlxIw/3 PQX1vUP3nBWFThSH8p7Nax6ZACC7Dp/KZS80xTNWUt0G9wWffmmoWXTASdzszw27 ZYtZXgv4ne/ubjyAodM8jfUBLc7DNrHTujS2KfrtFBhaU2At7Tt0+YI9BEwfYGS5 hgsNi+8/aizcqmZOLoOGmMmP+QOnenQZRCYvO9eKjQq1Xi6qMJLb1iqtRO/pf9VG 1lFFCNIes2q3Fc2wyrxu =JIwr -----END PGP SIGNATURE----- --00GvhwF7k39YY--