Zhaoxin CPUs have implemented the SHA(Secure Hash Algorithm) as its CPU
instructions, including SHA1, SHA256, SHA384 and SHA512, which conform
to the Secure Hash Algorithms specified by FIPS 180-3.
Zhaoxin CPU's SHA1/SHA256 implementation is compatible with VIA's
SHA1/SHA256, so add Zhaoxin CPU's SHA384/SHA512 support in padlock-sha.c.
With the help of implementation of SHA in hardware instead of software,
can develop applications with higher performance, more security and more
flexibility.
Below table gives a summary of test using the driver tcrypt with different
crypt algorithm drivers on Zhaoxin KH-40000 platform:
---------------------------------------------------------------------------
tcrypt driver 16* 64 256 1024 2048 4096 8192
---------------------------------------------------------------------------
PadLock** 442.80 1309.21 3257.53 5221.56 5813.45 6136.39 6264.50***
403:SHA1 generic** 341.44 813.27 1458.98 1818.03 1896.60 1940.71 1939.06
ratio 1.30 1.61 2.23 2.87 3.07 3.16 3.23
---------------------------------------------------------------------------
Padlock 451.70 1313.65 2958.71 4658.55 5109.16 5359.08 5459.13
404:SHA256 generic 202.62 463.55 845.01 1070.50 1117.51 1144.79 1155.68
ratio 2.23 2.83 3.50 4.35 4.57 4.68 4.72
---------------------------------------------------------------------------
Padlock 350.90 1406.42 3166.16 5736.39 6627.77 7182.01 7429.18
405:SHA384 generic 161.76 654.88 979.06 1350.56 1423.08 1496.57 1513.12
ratio 2.17 2.15 3.23 4.25 4.66 4.80 4.91
---------------------------------------------------------------------------
Padlock 334.49 1394.71 3159.93 5728.86 6625.33 7169.23 7407.80
406:SHA512 generic 161.80 653.84 979.42 1351.41 1444.14 1495.35 1518.43
ratio 2.07 2.13 3.23 4.24 4.59 4.79 4.88
---------------------------------------------------------------------------
*: The length of each data block to be processed by one complete SHA
sequence, namely one INIT, multi UPDATEs and one FINAL.
**: Crypt algorithm driver used by tcrypt, "PadLock" represents padlock-sha
while "generic" represents the generic software SHA driver.
***: The speed of each crypt algorithm driver processing different length
of data blocks, unit is Mb/s.
The ratio in the table implies the performance of SHA implemented by
padlock-sha driver is much higher than the ones implemented by the generic
software driver of sha1/sha256/sha384/sha512.
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx>
---
drivers/crypto/Kconfig | 10 +-
drivers/crypto/padlock-sha.c | 200 ++++++++++++++++++++++++++++++++++-
2 files changed, 202 insertions(+), 8 deletions(-)
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 19ab145f912e..0e97be36e037 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -39,15 +39,19 @@ config CRYPTO_DEV_PADLOCK_AES
called padlock-aes.
config CRYPTO_DEV_PADLOCK_SHA
- tristate "PadLock driver for SHA1 and SHA256 algorithms"
+ tristate "PadLock driver for SHA1/SHA256/SHA384/SHA512 algorithms"
+ depends on X86 && !UML
depends on CRYPTO_DEV_PADLOCK
select CRYPTO_HASH
select CRYPTO_SHA1
select CRYPTO_SHA256
+ select CRYPTO_SHA512
help
- Use VIA PadLock for SHA1/SHA256 algorithms.
+ Use PadLock for SHA1/SHA256 algorithms.
+ Available in VIA C7 and newer processors, available in Zhaoxin processors.
- Available in VIA C7 and newer processors.
+ Use PadLock for SHA384/SHA512 algorithms.
+ Available in Zhaoxin processors.
If unsure say M. The compiled module will be
called padlock-sha.
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index 6865c7f1fc1a..80af906184e2 100644
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -5,6 +5,10 @@
* Support for VIA PadLock hardware crypto engine.
*
* Copyright (c) 2006 Michal Ludvig <michal@xxxxxxxx>
+ *
+ * Add SHA384/SHA512 support for Zhaoxin processors.
+ *
+ * Copyright (c) 2025 George Xue <georgexue@xxxxxxxxxxx>
*/
#include <crypto/internal/hash.h>
@@ -434,6 +438,123 @@ static int padlock_sha256_final_nano(struct shash_desc *desc, u8 *out)
return 0;
}
+static inline void padlock_output_block_512(uint64_t *src, uint64_t *dst, size_t count)
+{
+ while (count--)
+ *dst++ = swab64(*src++);
+}
+
+static int padlock_sha384_init(struct shash_desc *desc)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+
+ *sctx = (struct sha512_state){
+ .state = { SHA384_H0, SHA384_H1, SHA384_H2, SHA384_H3, SHA384_H4, SHA384_H5,
+ SHA384_H6, SHA384_H7 },
+ .count = { 0, 0 },
+ };
+
+ return 0;
+}
+
+static int padlock_sha512_init(struct shash_desc *desc)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+
+ *sctx = (struct sha512_state){
+ .state = { SHA512_H0, SHA512_H1, SHA512_H2, SHA512_H3, SHA512_H4, SHA512_H5,
+ SHA512_H6, SHA512_H7 },
+ .count = { 0, 0 },
+ };
+
+ return 0;
+}
+
+static int padlock_sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ unsigned int partial, done;
+ const u8 *src;
+ u8 buf[SHA512_BLOCK_SIZE];
+ u8 *dst = &buf[0];
+
+ partial = sctx->count[0] % SHA512_BLOCK_SIZE;
+
+ sctx->count[0] += len;
+ if (sctx->count[0] < len)
+ sctx->count[1]++;
+
+ done = 0;
+ src = data;
+ memcpy(dst, sctx->state, SHA512_DIGEST_SIZE);
+
+ if ((partial + len) >= SHA512_BLOCK_SIZE) {
+ /* Append the bytes in state's buffer to a block to handle */
+ if (partial) {
+ done = -partial;
+ memcpy(sctx->buf + partial, data, done + SHA512_BLOCK_SIZE);
+
+ src = sctx->buf;
+
+ asm volatile(".byte 0xf3, 0x0f, 0xa6, 0xe0"
+ : "+S"(src), "+D"(dst)
+ : "c"(1UL));
+
+ done += SHA512_BLOCK_SIZE;
+ src = data + done;
+ }
+
+ /* Process the left bytes from input data */
+ if (len - done >= SHA512_BLOCK_SIZE) {
+ asm volatile(".byte 0xf3, 0x0f, 0xa6, 0xe0"
+ : "+S"(src), "+D"(dst)
+ : "c"((unsigned long)((len - done) / SHA512_BLOCK_SIZE)));
+
+ done += ((len - done) - (len - done) % SHA512_BLOCK_SIZE);
+ src = data + done;
+ }
+ partial = 0;
+ }
+
+ memcpy(sctx->state, dst, SHA512_DIGEST_SIZE);
+ memcpy(sctx->buf + partial, src, len - done);
+
+ return 0;
+}
+
+static int padlock_sha512_final(struct shash_desc *desc, u8 *out)
+{
+ const int bit_offset = SHA512_BLOCK_SIZE - sizeof(__be64[2]);
+ struct sha512_state *state = shash_desc_ctx(desc);
+ unsigned int partial = state->count[0] % SHA512_BLOCK_SIZE, padlen;
+ __be64 bits[2];
+
+ /* Both SHA384 and SHA512 may be supported. */
+ int dgst_size = crypto_shash_digestsize(desc->tfm);
+
+ static u8 padding[SHA512_BLOCK_SIZE];
+
+ memset(padding, 0, SHA512_BLOCK_SIZE);
+ padding[0] = 0x80;
+
+ /* Convert byte count in little endian to bit count in big endian. */
+ bits[0] = cpu_to_be64(state->count[1] << 3 | state->count[0] >> 61);
+ bits[1] = cpu_to_be64(state->count[0] << 3);
+
+ padlen = (partial < bit_offset) ? (bit_offset - partial) :
+ ((SHA512_BLOCK_SIZE + bit_offset) - partial);
+
+ padlock_sha512_update(desc, padding, padlen);
+
+ /* Append length field bytes */
+ padlock_sha512_update(desc, (const u8 *)bits, sizeof(__be64[2]));
+
+ /* Swap to output */
+ padlock_output_block_512(state->state, (uint64_t *)out, dgst_size / sizeof(uint64_t));
+
+ return 0;
+}
+
static int padlock_sha_export_nano(struct shash_desc *desc,
void *out)
{
@@ -490,6 +611,42 @@ static struct shash_alg sha256_alg_nano = {
}
};
+static struct shash_alg sha384_alg = {
+ .digestsize = SHA384_DIGEST_SIZE,
+ .init = padlock_sha384_init,
+ .update = padlock_sha512_update,
+ .final = padlock_sha512_final,
+ .export = padlock_sha_export_nano,
+ .import = padlock_sha_import_nano,
+ .descsize = sizeof(struct sha512_state),
+ .statesize = sizeof(struct sha512_state),
+ .base = {
+ .cra_name = "sha384",
+ .cra_driver_name = "sha384-padlock-zhaoxin",
+ .cra_priority = PADLOCK_CRA_PRIORITY,
+ .cra_blocksize = SHA384_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static struct shash_alg sha512_alg = {
+ .digestsize = SHA512_DIGEST_SIZE,
+ .init = padlock_sha512_init,
+ .update = padlock_sha512_update,
+ .final = padlock_sha512_final,
+ .export = padlock_sha_export_nano,
+ .import = padlock_sha_import_nano,
+ .descsize = sizeof(struct sha512_state),
+ .statesize = sizeof(struct sha512_state),
+ .base = {
+ .cra_name = "sha512",
+ .cra_driver_name = "sha512-padlock-zhaoxin",
+ .cra_priority = PADLOCK_CRA_PRIORITY,
+ .cra_blocksize = SHA512_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
static const struct x86_cpu_id padlock_sha_ids[] = {
X86_MATCH_FEATURE(X86_FEATURE_PHE, NULL),
{}
@@ -502,12 +659,16 @@ static int __init padlock_init(void)
struct cpuinfo_x86 *c = &cpu_data(0);
struct shash_alg *sha1;
struct shash_alg *sha256;
+ struct shash_alg *sha384;
+ struct shash_alg *sha512;
if (!x86_match_cpu(padlock_sha_ids) || !boot_cpu_has(X86_FEATURE_PHE_EN))
return -ENODEV;
- /* Register the newly added algorithm module if on *
- * VIA Nano processor, or else just do as before */
+ /*
+ * Register the newly added algorithm module if on
+ * Zhaoxin/VIA Nano processor, or else just do as before
+ */
if (c->x86_model < 0x0f) {
sha1 = &sha1_alg;
sha256 = &sha256_alg;
@@ -524,15 +685,34 @@ static int __init padlock_init(void)
if (rc)
goto out_unreg1;
- printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");
+ printk(KERN_NOTICE PFX "Using PadLock ACE for SHA1/SHA256 algorithms.\n");
+
+ if (boot_cpu_has(X86_FEATURE_PHE2_EN)) {
+ sha384 = &sha384_alg;
+ sha512 = &sha512_alg;
+
+ rc = crypto_register_shash(sha384);
+ if (rc)
+ goto out_unreg2;
+
+ rc = crypto_register_shash(sha512);
+ if (rc)
+ goto out_unreg3;
+
+ printk(KERN_NOTICE PFX "Using PadLock ACE for SHA384/SHA512 algorithms.\n");
+ }
return 0;
+out_unreg3:
+ crypto_unregister_shash(sha384);
+out_unreg2:
+ crypto_unregister_shash(sha256);
out_unreg1:
crypto_unregister_shash(sha1);
out:
- printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
+ printk(KERN_ERR PFX "PadLock SHA1/SHA256/SHA384/SHA5112 initialization failed.\n");
return rc;
}
@@ -543,6 +723,11 @@ static void __exit padlock_fini(void)
if (c->x86_model >= 0x0f) {
crypto_unregister_shash(&sha1_alg_nano);
crypto_unregister_shash(&sha256_alg_nano);
+
+ if (boot_cpu_has(X86_FEATURE_PHE2_EN)) {
+ crypto_unregister_shash(&sha384_alg);
+ crypto_unregister_shash(&sha512_alg);
+ }
} else {
crypto_unregister_shash(&sha1_alg);
crypto_unregister_shash(&sha256_alg);
@@ -552,11 +737,16 @@ static void __exit padlock_fini(void)
module_init(padlock_init);
module_exit(padlock_fini);
-MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
+MODULE_DESCRIPTION("PadLock SHA1/SHA256/SHA384/SHA512 algorithms support.");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michal Ludvig");
+MODULE_AUTHOR("George Xue <georgexue@xxxxxxxxxxx>");
MODULE_ALIAS_CRYPTO("sha1-all");
MODULE_ALIAS_CRYPTO("sha256-all");
+MODULE_ALIAS_CRYPTO("sha384-all");
+MODULE_ALIAS_CRYPTO("sha512-all");
MODULE_ALIAS_CRYPTO("sha1-padlock");
MODULE_ALIAS_CRYPTO("sha256-padlock");
+MODULE_ALIAS_CRYPTO("sha384-padlock");
+MODULE_ALIAS_CRYPTO("sha512-padlock");
--
2.25.1
