[PATCH 5.6 069/118] crypto: arch/nhpoly1305 - process in explicit 4k chunks

[Greg Kroah-Hartman]

From: Jason A. Donenfeld <ja...@zx2c4.com>

commit a9a8ba90fa5857c2c8a0e32eef2159cec717da11 upstream.

Rather than chunking via PAGE_SIZE, this commit changes the arch
implementations to chunk in explicit 4k parts, so that calculations on
maximum acceptable latency don't suddenly become invalid on platforms
where PAGE_SIZE isn't 4k, such as arm64.

Fixes: 0f961f9f670e ("crypto: x86/nhpoly1305 - add AVX2 accelerated NHPoly1305")
Fixes: 012c82388c03 ("crypto: x86/nhpoly1305 - add SSE2 accelerated NHPoly1305")
Fixes: a00fa0c88774 ("crypto: arm64/nhpoly1305 - add NEON-accelerated 
NHPoly1305")
Fixes: 16aae3595a9d ("crypto: arm/nhpoly1305 - add NEON-accelerated NHPoly1305")
Cc: sta...@vger.kernel.org
Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
Reviewed-by: Eric Biggers <ebigg...@google.com>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 arch/arm/crypto/nhpoly1305-neon-glue.c   |    2 +-
 arch/arm64/crypto/nhpoly1305-neon-glue.c |    2 +-
 arch/x86/crypto/nhpoly1305-avx2-glue.c   |    2 +-
 arch/x86/crypto/nhpoly1305-sse2-glue.c   |    2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

--- a/arch/arm/crypto/nhpoly1305-neon-glue.c
+++ b/arch/arm/crypto/nhpoly1305-neon-glue.c
@@ -30,7 +30,7 @@ static int nhpoly1305_neon_update(struct
                return crypto_nhpoly1305_update(desc, src, srclen);
 
        do {
-               unsigned int n = min_t(unsigned int, srclen, PAGE_SIZE);
+               unsigned int n = min_t(unsigned int, srclen, SZ_4K);
 
                kernel_neon_begin();
                crypto_nhpoly1305_update_helper(desc, src, n, _nh_neon);
--- a/arch/arm64/crypto/nhpoly1305-neon-glue.c
+++ b/arch/arm64/crypto/nhpoly1305-neon-glue.c
@@ -30,7 +30,7 @@ static int nhpoly1305_neon_update(struct
                return crypto_nhpoly1305_update(desc, src, srclen);
 
        do {
-               unsigned int n = min_t(unsigned int, srclen, PAGE_SIZE);
+               unsigned int n = min_t(unsigned int, srclen, SZ_4K);
 
                kernel_neon_begin();
                crypto_nhpoly1305_update_helper(desc, src, n, _nh_neon);
--- a/arch/x86/crypto/nhpoly1305-avx2-glue.c
+++ b/arch/x86/crypto/nhpoly1305-avx2-glue.c
@@ -29,7 +29,7 @@ static int nhpoly1305_avx2_update(struct
                return crypto_nhpoly1305_update(desc, src, srclen);
 
        do {
-               unsigned int n = min_t(unsigned int, srclen, PAGE_SIZE);
+               unsigned int n = min_t(unsigned int, srclen, SZ_4K);
 
                kernel_fpu_begin();
                crypto_nhpoly1305_update_helper(desc, src, n, _nh_avx2);
--- a/arch/x86/crypto/nhpoly1305-sse2-glue.c
+++ b/arch/x86/crypto/nhpoly1305-sse2-glue.c
@@ -29,7 +29,7 @@ static int nhpoly1305_sse2_update(struct
                return crypto_nhpoly1305_update(desc, src, srclen);
 
        do {
-               unsigned int n = min_t(unsigned int, srclen, PAGE_SIZE);
+               unsigned int n = min_t(unsigned int, srclen, SZ_4K);
 
                kernel_fpu_begin();
                crypto_nhpoly1305_update_helper(desc, src, n, _nh_sse2);