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authorAndy Lutomirski <luto@kernel.org>2016-10-31 15:18:44 -0700
committerIngo Molnar <mingo@kernel.org>2016-11-01 07:47:54 +0100
commit5a83d60c074ddf4f6364be25654a643d0e941824 (patch)
treeb4fea81759dc1bca3ba7eab08027d5ed7f243ffa /drivers/crypto
parentfc560a80bac91e512fc37cdfe03a982ef4543c6b (diff)
downloadlinux-5a83d60c074ddf4f6364be25654a643d0e941824.tar.gz
x86/fpu: Remove irq_ts_save() and irq_ts_restore()
Now that lazy FPU is gone, we don't use CR0.TS (except possibly in KVM guest mode). Remove irq_ts_save(), irq_ts_restore(), and all of their callers. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Rik van Riel <riel@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kvm list <kvm@vger.kernel.org> Link: http://lkml.kernel.org/r/70b9b9e7ba70659bedcb08aba63d0f9214f338f2.1477951965.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/padlock-aes.c23
-rw-r--r--drivers/crypto/padlock-sha.c18
2 files changed, 2 insertions, 39 deletions
diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 441e86b23571..b3869748cc6b 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -183,8 +183,8 @@ static inline void padlock_store_cword(struct cword *cword)
/*
* While the padlock instructions don't use FP/SSE registers, they
- * generate a spurious DNA fault when cr0.ts is '1'. These instructions
- * should be used only inside the irq_ts_save/restore() context
+ * generate a spurious DNA fault when CR0.TS is '1'. Fortunately,
+ * the kernel doesn't use CR0.TS.
*/
static inline void rep_xcrypt_ecb(const u8 *input, u8 *output, void *key,
@@ -298,24 +298,18 @@ static inline u8 *padlock_xcrypt_cbc(const u8 *input, u8 *output, void *key,
static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
struct aes_ctx *ctx = aes_ctx(tfm);
- int ts_state;
padlock_reset_key(&ctx->cword.encrypt);
- ts_state = irq_ts_save();
ecb_crypt(in, out, ctx->E, &ctx->cword.encrypt, 1);
- irq_ts_restore(ts_state);
padlock_store_cword(&ctx->cword.encrypt);
}
static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
struct aes_ctx *ctx = aes_ctx(tfm);
- int ts_state;
padlock_reset_key(&ctx->cword.encrypt);
- ts_state = irq_ts_save();
ecb_crypt(in, out, ctx->D, &ctx->cword.decrypt, 1);
- irq_ts_restore(ts_state);
padlock_store_cword(&ctx->cword.encrypt);
}
@@ -346,14 +340,12 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
int err;
- int ts_state;
padlock_reset_key(&ctx->cword.encrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
- ts_state = irq_ts_save();
while ((nbytes = walk.nbytes)) {
padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
ctx->E, &ctx->cword.encrypt,
@@ -361,7 +353,6 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- irq_ts_restore(ts_state);
padlock_store_cword(&ctx->cword.encrypt);
@@ -375,14 +366,12 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
int err;
- int ts_state;
padlock_reset_key(&ctx->cword.decrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
- ts_state = irq_ts_save();
while ((nbytes = walk.nbytes)) {
padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
ctx->D, &ctx->cword.decrypt,
@@ -390,7 +379,6 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- irq_ts_restore(ts_state);
padlock_store_cword(&ctx->cword.encrypt);
@@ -425,14 +413,12 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
int err;
- int ts_state;
padlock_reset_key(&ctx->cword.encrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
- ts_state = irq_ts_save();
while ((nbytes = walk.nbytes)) {
u8 *iv = padlock_xcrypt_cbc(walk.src.virt.addr,
walk.dst.virt.addr, ctx->E,
@@ -442,7 +428,6 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- irq_ts_restore(ts_state);
padlock_store_cword(&ctx->cword.decrypt);
@@ -456,14 +441,12 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
struct blkcipher_walk walk;
int err;
- int ts_state;
padlock_reset_key(&ctx->cword.encrypt);
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
- ts_state = irq_ts_save();
while ((nbytes = walk.nbytes)) {
padlock_xcrypt_cbc(walk.src.virt.addr, walk.dst.virt.addr,
ctx->D, walk.iv, &ctx->cword.decrypt,
@@ -472,8 +455,6 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- irq_ts_restore(ts_state);
-
padlock_store_cword(&ctx->cword.encrypt);
return err;
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index 8c5f90647b7a..bc72d20c32c3 100644
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -89,7 +89,6 @@ static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in,
struct sha1_state state;
unsigned int space;
unsigned int leftover;
- int ts_state;
int err;
dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
@@ -120,14 +119,11 @@ static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in,
memcpy(result, &state.state, SHA1_DIGEST_SIZE);
- /* prevent taking the spurious DNA fault with padlock. */
- ts_state = irq_ts_save();
asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
: \
: "c"((unsigned long)state.count + count), \
"a"((unsigned long)state.count), \
"S"(in), "D"(result));
- irq_ts_restore(ts_state);
padlock_output_block((uint32_t *)result, (uint32_t *)out, 5);
@@ -155,7 +151,6 @@ static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in,
struct sha256_state state;
unsigned int space;
unsigned int leftover;
- int ts_state;
int err;
dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
@@ -186,14 +181,11 @@ static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in,
memcpy(result, &state.state, SHA256_DIGEST_SIZE);
- /* prevent taking the spurious DNA fault with padlock. */
- ts_state = irq_ts_save();
asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
: \
: "c"((unsigned long)state.count + count), \
"a"((unsigned long)state.count), \
"S"(in), "D"(result));
- irq_ts_restore(ts_state);
padlock_output_block((uint32_t *)result, (uint32_t *)out, 8);
@@ -312,7 +304,6 @@ static int padlock_sha1_update_nano(struct shash_desc *desc,
u8 buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
((aligned(STACK_ALIGN)));
u8 *dst = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
- int ts_state;
partial = sctx->count & 0x3f;
sctx->count += len;
@@ -328,23 +319,19 @@ static int padlock_sha1_update_nano(struct shash_desc *desc,
memcpy(sctx->buffer + partial, data,
done + SHA1_BLOCK_SIZE);
src = sctx->buffer;
- ts_state = irq_ts_save();
asm volatile (".byte 0xf3,0x0f,0xa6,0xc8"
: "+S"(src), "+D"(dst) \
: "a"((long)-1), "c"((unsigned long)1));
- irq_ts_restore(ts_state);
done += SHA1_BLOCK_SIZE;
src = data + done;
}
/* Process the left bytes from the input data */
if (len - done >= SHA1_BLOCK_SIZE) {
- ts_state = irq_ts_save();
asm volatile (".byte 0xf3,0x0f,0xa6,0xc8"
: "+S"(src), "+D"(dst)
: "a"((long)-1),
"c"((unsigned long)((len - done) / SHA1_BLOCK_SIZE)));
- irq_ts_restore(ts_state);
done += ((len - done) - (len - done) % SHA1_BLOCK_SIZE);
src = data + done;
}
@@ -401,7 +388,6 @@ static int padlock_sha256_update_nano(struct shash_desc *desc, const u8 *data,
u8 buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
((aligned(STACK_ALIGN)));
u8 *dst = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
- int ts_state;
partial = sctx->count & 0x3f;
sctx->count += len;
@@ -417,23 +403,19 @@ static int padlock_sha256_update_nano(struct shash_desc *desc, const u8 *data,
memcpy(sctx->buf + partial, data,
done + SHA256_BLOCK_SIZE);
src = sctx->buf;
- ts_state = irq_ts_save();
asm volatile (".byte 0xf3,0x0f,0xa6,0xd0"
: "+S"(src), "+D"(dst)
: "a"((long)-1), "c"((unsigned long)1));
- irq_ts_restore(ts_state);
done += SHA256_BLOCK_SIZE;
src = data + done;
}
/* Process the left bytes from input data*/
if (len - done >= SHA256_BLOCK_SIZE) {
- ts_state = irq_ts_save();
asm volatile (".byte 0xf3,0x0f,0xa6,0xd0"
: "+S"(src), "+D"(dst)
: "a"((long)-1),
"c"((unsigned long)((len - done) / 64)));
- irq_ts_restore(ts_state);
done += ((len - done) - (len - done) % 64);
src = data + done;
}