122 lines
3.7 KiB
Diff
122 lines
3.7 KiB
Diff
From b78cffc4084058a9d449692c7464f86d3ff85e8d Mon Sep 17 00:00:00 2001
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Message-Id: <b78cffc4084058a9d449692c7464f86d3ff85e8d.1596234183.git.zanussi@kernel.org>
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In-Reply-To: <378ee68279f6a7631221f2670a9298620148690d.1596234183.git.zanussi@kernel.org>
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References: <378ee68279f6a7631221f2670a9298620148690d.1596234183.git.zanussi@kernel.org>
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From: Peter Zijlstra <peterz@infradead.org>
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Date: Mon, 14 Nov 2011 18:19:27 +0100
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Subject: [PATCH 220/329] x86: crypto: Reduce preempt disabled regions
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.135-rt60.tar.xz
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Restrict the preempt disabled regions to the actual floating point
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operations and enable preemption for the administrative actions.
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This is necessary on RT to avoid that kfree and other operations are
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called with preemption disabled.
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Reported-and-tested-by: Carsten Emde <cbe@osadl.org>
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Signed-off-by: Peter Zijlstra <peterz@infradead.org>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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arch/x86/crypto/aesni-intel_glue.c | 22 ++++++++++++----------
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1 file changed, 12 insertions(+), 10 deletions(-)
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diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
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index 917f25e4d0a8..58d8c03fc32d 100644
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--- a/arch/x86/crypto/aesni-intel_glue.c
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+++ b/arch/x86/crypto/aesni-intel_glue.c
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@@ -434,14 +434,14 @@ static int ecb_encrypt(struct skcipher_request *req)
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err = skcipher_walk_virt(&walk, req, true);
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- kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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+ kernel_fpu_begin();
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aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK);
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+ kernel_fpu_end();
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nbytes &= AES_BLOCK_SIZE - 1;
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err = skcipher_walk_done(&walk, nbytes);
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}
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- kernel_fpu_end();
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return err;
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}
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@@ -456,14 +456,14 @@ static int ecb_decrypt(struct skcipher_request *req)
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err = skcipher_walk_virt(&walk, req, true);
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- kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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+ kernel_fpu_begin();
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aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK);
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+ kernel_fpu_end();
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nbytes &= AES_BLOCK_SIZE - 1;
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err = skcipher_walk_done(&walk, nbytes);
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}
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- kernel_fpu_end();
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return err;
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}
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@@ -478,14 +478,14 @@ static int cbc_encrypt(struct skcipher_request *req)
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err = skcipher_walk_virt(&walk, req, true);
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- kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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+ kernel_fpu_begin();
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aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK, walk.iv);
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+ kernel_fpu_end();
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nbytes &= AES_BLOCK_SIZE - 1;
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err = skcipher_walk_done(&walk, nbytes);
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}
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- kernel_fpu_end();
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return err;
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}
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@@ -500,14 +500,14 @@ static int cbc_decrypt(struct skcipher_request *req)
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err = skcipher_walk_virt(&walk, req, true);
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- kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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+ kernel_fpu_begin();
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aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK, walk.iv);
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+ kernel_fpu_end();
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nbytes &= AES_BLOCK_SIZE - 1;
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err = skcipher_walk_done(&walk, nbytes);
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}
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- kernel_fpu_end();
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return err;
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}
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@@ -557,18 +557,20 @@ static int ctr_crypt(struct skcipher_request *req)
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err = skcipher_walk_virt(&walk, req, true);
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- kernel_fpu_begin();
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while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
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+ kernel_fpu_begin();
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aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK, walk.iv);
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+ kernel_fpu_end();
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nbytes &= AES_BLOCK_SIZE - 1;
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err = skcipher_walk_done(&walk, nbytes);
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}
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if (walk.nbytes) {
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+ kernel_fpu_begin();
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ctr_crypt_final(ctx, &walk);
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+ kernel_fpu_end();
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err = skcipher_walk_done(&walk, 0);
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}
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- kernel_fpu_end();
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return err;
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}
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--
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2.17.1
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