diff options
| author | Ilya Lesokhin <ilyal@mellanox.com> | 2016-12-13 16:32:06 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-12-27 17:48:48 +0800 |
| commit | 50fb57042402c819d247ac4231b80b0da86e2fd7 (patch) | |
| tree | 218cf54abb1e25a238d18911823194c43b71be43 /arch/x86 | |
| parent | f262c770644fb7685f8e091b7070dfab286bfc5b (diff) | |
| download | linux-50fb57042402c819d247ac4231b80b0da86e2fd7.tar.gz linux-50fb57042402c819d247ac4231b80b0da86e2fd7.tar.xz | |
crypto: aesni-intel - RFC4106 can zero copy when !PageHighMem
In the common case of !PageHighMem we can do zero copy crypto
even if sg crosses a pages boundary.
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/crypto/aesni-intel_glue.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 31c34ee131f3..36ca1502630c 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -740,9 +740,11 @@ static int helper_rfc4106_encrypt(struct aead_request *req) *((__be32 *)(iv+12)) = counter; if (sg_is_last(req->src) && - req->src->offset + req->src->length <= PAGE_SIZE && + (!PageHighMem(sg_page(req->src)) || + req->src->offset + req->src->length <= PAGE_SIZE) && sg_is_last(req->dst) && - req->dst->offset + req->dst->length <= PAGE_SIZE) { + (!PageHighMem(sg_page(req->dst)) || + req->dst->offset + req->dst->length <= PAGE_SIZE)) { one_entry_in_sg = 1; scatterwalk_start(&src_sg_walk, req->src); assoc = scatterwalk_map(&src_sg_walk); @@ -822,9 +824,11 @@ static int helper_rfc4106_decrypt(struct aead_request *req) *((__be32 *)(iv+12)) = counter; if (sg_is_last(req->src) && - req->src->offset + req->src->length <= PAGE_SIZE && + (!PageHighMem(sg_page(req->src)) || + req->src->offset + req->src->length <= PAGE_SIZE) && sg_is_last(req->dst) && - req->dst->offset + req->dst->length <= PAGE_SIZE) { + (!PageHighMem(sg_page(req->dst)) || + req->dst->offset + req->dst->length <= PAGE_SIZE)) { one_entry_in_sg = 1; scatterwalk_start(&src_sg_walk, req->src); assoc = scatterwalk_map(&src_sg_walk); |