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[src-draft/trunk]: src/sys Add x86 AES-NI support.
details: https://anonhg.NetBSD.org/src-all/rev/9b8cc827186b
branches: trunk
changeset: 934604:9b8cc827186b
user: Taylor R Campbell <riastradh%NetBSD.org@localhost>
date: Sun Jun 14 18:06:43 2020 +0000
description:
Add x86 AES-NI support.
Limited to amd64 for now. In principle, AES-NI should work in 32-bit
mode, and there may even be some 32-bit-only CPUs that support
AES-NI, but that requires work to adapt the assembly.
diffstat:
sys/arch/amd64/conf/files.amd64 | 3 +
sys/arch/x86/x86/identcpu.c | 6 +
sys/crypto/aes/aes.h | 8 +-
sys/crypto/aes/aes_impl.c | 58 +-
sys/crypto/aes/aes_rijndael.c | 14 +-
sys/crypto/aes/arch/x86_64/aes_ni.c | 252 +++++++
sys/crypto/aes/arch/x86_64/aes_ni.h | 68 +
sys/crypto/aes/arch/x86_64/aesnifunc.S | 1101 ++++++++++++++++++++++++++++++++
sys/crypto/aes/arch/x86_64/files.aesni | 4 +
sys/rump/kern/lib/libcrypto/Makefile | 14 +-
10 files changed, 1512 insertions(+), 16 deletions(-)
diffs (truncated from 1658 to 300 lines):
diff -r 7a7dbacb078e -r 9b8cc827186b sys/arch/amd64/conf/files.amd64
--- a/sys/arch/amd64/conf/files.amd64 Fri Jun 12 05:16:46 2020 +0000
+++ b/sys/arch/amd64/conf/files.amd64 Sun Jun 14 18:06:43 2020 +0000
@@ -193,4 +193,7 @@
attach vmbus at acpinodebus with vmbus_acpi
file dev/acpi/vmbus_acpi.c vmbus_acpi
+# AES-NI
+include "crypto/aes/arch/x86_64/files.aesni"
+
include "arch/amd64/conf/majors.amd64"
diff -r 7a7dbacb078e -r 9b8cc827186b sys/arch/x86/x86/identcpu.c
--- a/sys/arch/x86/x86/identcpu.c Fri Jun 12 05:16:46 2020 +0000
+++ b/sys/arch/x86/x86/identcpu.c Sun Jun 14 18:06:43 2020 +0000
@@ -39,6 +39,8 @@
#include <sys/device.h>
#include <sys/cpu.h>
+#include <crypto/aes/arch/x86_64/aes_ni.h>
+
#include <uvm/uvm_extern.h>
#include <machine/specialreg.h>
@@ -995,6 +997,10 @@
/* Early patch of text segment. */
x86_patch(true);
#endif
+#ifdef __x86_64__ /* not yet implemented on i386 */
+ if (cpu_feature[1] & CPUID2_AES)
+ aes_md_init(&aes_ni_impl);
+#endif
} else {
/*
* If not first. Warn about cpu_feature mismatch for
diff -r 7a7dbacb078e -r 9b8cc827186b sys/crypto/aes/aes.h
--- a/sys/crypto/aes/aes.h Fri Jun 12 05:16:46 2020 +0000
+++ b/sys/crypto/aes/aes.h Sun Jun 14 18:06:43 2020 +0000
@@ -74,8 +74,12 @@
int aes_selftest(const struct aes_impl *);
-void aes_setenckey(struct aesenc *, const uint8_t[static 16], uint32_t);
-void aes_setdeckey(struct aesdec *, const uint8_t[static 16], uint32_t);
+uint32_t aes_setenckey128(struct aesenc *, const uint8_t[static 16]);
+uint32_t aes_setenckey192(struct aesenc *, const uint8_t[static 24]);
+uint32_t aes_setenckey256(struct aesenc *, const uint8_t[static 32]);
+uint32_t aes_setdeckey128(struct aesdec *, const uint8_t[static 16]);
+uint32_t aes_setdeckey192(struct aesdec *, const uint8_t[static 24]);
+uint32_t aes_setdeckey256(struct aesdec *, const uint8_t[static 32]);
void aes_enc(const struct aesenc *, const uint8_t[static 16],
uint8_t[static 16], uint32_t);
diff -r 7a7dbacb078e -r 9b8cc827186b sys/crypto/aes/aes_impl.c
--- a/sys/crypto/aes/aes_impl.c Fri Jun 12 05:16:46 2020 +0000
+++ b/sys/crypto/aes/aes_impl.c Sun Jun 14 18:06:43 2020 +0000
@@ -125,7 +125,7 @@
aes_md_impl = impl;
}
-void
+static void
aes_setenckey(struct aesenc *enc, const uint8_t key[static 16],
uint32_t nrounds)
{
@@ -134,7 +134,34 @@
aes_impl->ai_setenckey(enc, key, nrounds);
}
-void
+uint32_t
+aes_setenckey128(struct aesenc *enc, const uint8_t key[static 16])
+{
+ uint32_t nrounds = AES_128_NROUNDS;
+
+ aes_setenckey(enc, key, nrounds);
+ return nrounds;
+}
+
+uint32_t
+aes_setenckey192(struct aesenc *enc, const uint8_t key[static 24])
+{
+ uint32_t nrounds = AES_192_NROUNDS;
+
+ aes_setenckey(enc, key, nrounds);
+ return nrounds;
+}
+
+uint32_t
+aes_setenckey256(struct aesenc *enc, const uint8_t key[static 32])
+{
+ uint32_t nrounds = AES_256_NROUNDS;
+
+ aes_setenckey(enc, key, nrounds);
+ return nrounds;
+}
+
+static void
aes_setdeckey(struct aesdec *dec, const uint8_t key[static 16],
uint32_t nrounds)
{
@@ -143,6 +170,33 @@
aes_impl->ai_setdeckey(dec, key, nrounds);
}
+uint32_t
+aes_setdeckey128(struct aesdec *dec, const uint8_t key[static 16])
+{
+ uint32_t nrounds = AES_128_NROUNDS;
+
+ aes_setdeckey(dec, key, nrounds);
+ return nrounds;
+}
+
+uint32_t
+aes_setdeckey192(struct aesdec *dec, const uint8_t key[static 24])
+{
+ uint32_t nrounds = AES_192_NROUNDS;
+
+ aes_setdeckey(dec, key, nrounds);
+ return nrounds;
+}
+
+uint32_t
+aes_setdeckey256(struct aesdec *dec, const uint8_t key[static 32])
+{
+ uint32_t nrounds = AES_256_NROUNDS;
+
+ aes_setdeckey(dec, key, nrounds);
+ return nrounds;
+}
+
void
aes_enc(const struct aesenc *enc, const uint8_t in[static 16],
uint8_t out[static 16], uint32_t nrounds)
diff -r 7a7dbacb078e -r 9b8cc827186b sys/crypto/aes/aes_rijndael.c
--- a/sys/crypto/aes/aes_rijndael.c Fri Jun 12 05:16:46 2020 +0000
+++ b/sys/crypto/aes/aes_rijndael.c Sun Jun 14 18:06:43 2020 +0000
@@ -84,19 +84,18 @@
switch (keybits) {
case 128:
- nrounds = AES_128_NROUNDS;
+ nrounds = aes_setenckey128(&enc, key);
break;
case 192:
- nrounds = AES_192_NROUNDS;
+ nrounds = aes_setenckey192(&enc, key);
break;
case 256:
- nrounds = AES_256_NROUNDS;
+ nrounds = aes_setenckey256(&enc, key);
break;
default:
panic("invalid AES key bits: %d", keybits);
}
- aes_setenckey(&enc, key, nrounds);
memcpy(rk, enc.aese_aes.aes_rk, 4*(nrounds + 1)*sizeof(rk[0]));
explicit_memset(&enc, 0, sizeof enc);
@@ -111,19 +110,18 @@
switch (keybits) {
case 128:
- nrounds = AES_128_NROUNDS;
+ nrounds = aes_setdeckey128(&dec, key);
break;
case 192:
- nrounds = AES_192_NROUNDS;
+ nrounds = aes_setdeckey192(&dec, key);
break;
case 256:
- nrounds = AES_256_NROUNDS;
+ nrounds = aes_setdeckey256(&dec, key);
break;
default:
panic("invalid AES key bits: %d", keybits);
}
- aes_setdeckey(&dec, key, nrounds);
memcpy(rk, dec.aesd_aes.aes_rk, 4*(nrounds + 1)*sizeof(rk[0]));
explicit_memset(&dec, 0, sizeof dec);
diff -r 7a7dbacb078e -r 9b8cc827186b sys/crypto/aes/arch/x86_64/aes_ni.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/crypto/aes/arch/x86_64/aes_ni.c Sun Jun 14 18:06:43 2020 +0000
@@ -0,0 +1,252 @@
+/* $NetBSD$ */
+
+/*-
+ * Copyright (c) 2020 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(1, "$NetBSD$");
+
+#include <sys/types.h>
+#include <sys/systm.h>
+
+#include <crypto/aes/aes.h>
+#include <crypto/aes/arch/x86_64/aes_ni.h>
+
+#include <x86/cpuvar.h>
+#include <x86/fpu.h>
+#include <x86/specialreg.h>
+
+static void
+aesni_setenckey(struct aesenc *enc, const uint8_t key[static 16],
+ uint32_t nrounds)
+{
+
+ switch (nrounds) {
+ case 10:
+ aesni_setenckey128(enc, key);
+ break;
+ case 12:
+ aesni_setenckey192(enc, key);
+ break;
+ case 14:
+ aesni_setenckey256(enc, key);
+ break;
+ default:
+ panic("invalid AES rounds: %u", nrounds);
+ }
+}
+
+static void
+aesni_setenckey_impl(struct aesenc *enc, const uint8_t key[static 16],
+ uint32_t nrounds)
+{
+
+ fpu_kern_enter();
+ aesni_setenckey(enc, key, nrounds);
+ fpu_kern_leave();
+}
+
+static void
+aesni_setdeckey_impl(struct aesdec *dec, const uint8_t key[static 16],
+ uint32_t nrounds)
+{
+ struct aesenc enc;
+
+ fpu_kern_enter();
+ aesni_setenckey(&enc, key, nrounds);
+ aesni_enctodec(&enc, dec, nrounds);
+ fpu_kern_leave();
+
+ explicit_memset(&enc, 0, sizeof enc);
+}
+
+static void
+aesni_enc_impl(const struct aesenc *enc, const uint8_t in[static 16],
+ uint8_t out[static 16], uint32_t nrounds)
+{
+
+ fpu_kern_enter();
+ aesni_enc(enc, in, out, nrounds);
+ fpu_kern_leave();
+}
+
+static void
+aesni_dec_impl(const struct aesdec *dec, const uint8_t in[static 16],
+ uint8_t out[static 16], uint32_t nrounds)
+{
+
+ fpu_kern_enter();
+ aesni_dec(dec, in, out, nrounds);
+ fpu_kern_leave();
+}
+
+static void
+aesni_cbc_enc_impl(const struct aesenc *enc, const uint8_t in[static 16],
+ uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16],
+ uint32_t nrounds)
+{
+
+ KASSERT(nbytes % 16 == 0);
+
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