From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/drivers/crypto/vmx/aes_xts.c | 200 +++++++++++++++++++++----------------------------
1 files changed, 86 insertions(+), 114 deletions(-)
diff --git a/kernel/drivers/crypto/vmx/aes_xts.c b/kernel/drivers/crypto/vmx/aes_xts.c
index e9954a7..9fee1b1 100644
--- a/kernel/drivers/crypto/vmx/aes_xts.c
+++ b/kernel/drivers/crypto/vmx/aes_xts.c
@@ -1,34 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0-only
/**
* AES XTS routines supporting VMX In-core instructions on Power 8
*
* Copyright (C) 2015 International Business Machines Inc.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundations; version 2 only.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY of FITNESS FOR A PARTICUPAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
* Author: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
*/
-#include <linux/types.h>
-#include <linux/err.h>
-#include <linux/crypto.h>
-#include <linux/delay.h>
-#include <linux/hardirq.h>
+#include <asm/simd.h>
#include <asm/switch_to.h>
#include <crypto/aes.h>
-#include <crypto/scatterwalk.h>
+#include <crypto/internal/simd.h>
+#include <crypto/internal/skcipher.h>
#include <crypto/xts.h>
-#include <crypto/skcipher.h>
#include "aesp8-ppc.h"
@@ -39,46 +23,40 @@
struct aes_key tweak_key;
};
-static int p8_aes_xts_init(struct crypto_tfm *tfm)
+static int p8_aes_xts_init(struct crypto_skcipher *tfm)
{
- const char *alg = crypto_tfm_alg_name(tfm);
+ struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
struct crypto_skcipher *fallback;
- struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
- fallback = crypto_alloc_skcipher(alg, 0,
- CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
+ fallback = crypto_alloc_skcipher("xts(aes)", 0,
+ CRYPTO_ALG_NEED_FALLBACK |
+ CRYPTO_ALG_ASYNC);
if (IS_ERR(fallback)) {
- printk(KERN_ERR
- "Failed to allocate transformation for '%s': %ld\n",
- alg, PTR_ERR(fallback));
+ pr_err("Failed to allocate xts(aes) fallback: %ld\n",
+ PTR_ERR(fallback));
return PTR_ERR(fallback);
}
- crypto_skcipher_set_flags(
- fallback,
- crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
+ crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
+ crypto_skcipher_reqsize(fallback));
ctx->fallback = fallback;
-
return 0;
}
-static void p8_aes_xts_exit(struct crypto_tfm *tfm)
+static void p8_aes_xts_exit(struct crypto_skcipher *tfm)
{
- struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
- if (ctx->fallback) {
- crypto_free_skcipher(ctx->fallback);
- ctx->fallback = NULL;
- }
+ crypto_free_skcipher(ctx->fallback);
}
-static int p8_aes_xts_setkey(struct crypto_tfm *tfm, const u8 *key,
+static int p8_aes_xts_setkey(struct crypto_skcipher *tfm, const u8 *key,
unsigned int keylen)
{
+ struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
int ret;
- struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
- ret = xts_check_key(tfm, key, keylen);
+ ret = xts_verify_key(tfm, key, keylen);
if (ret)
return ret;
@@ -86,105 +64,99 @@
pagefault_disable();
enable_kernel_vsx();
ret = aes_p8_set_encrypt_key(key + keylen/2, (keylen/2) * 8, &ctx->tweak_key);
- ret += aes_p8_set_encrypt_key(key, (keylen/2) * 8, &ctx->enc_key);
- ret += aes_p8_set_decrypt_key(key, (keylen/2) * 8, &ctx->dec_key);
+ ret |= aes_p8_set_encrypt_key(key, (keylen/2) * 8, &ctx->enc_key);
+ ret |= aes_p8_set_decrypt_key(key, (keylen/2) * 8, &ctx->dec_key);
disable_kernel_vsx();
pagefault_enable();
preempt_enable();
- ret += crypto_skcipher_setkey(ctx->fallback, key, keylen);
- return ret;
+ ret |= crypto_skcipher_setkey(ctx->fallback, key, keylen);
+
+ return ret ? -EINVAL : 0;
}
-static int p8_aes_xts_crypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes, int enc)
+static int p8_aes_xts_crypt(struct skcipher_request *req, int enc)
{
- int ret;
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct p8_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ unsigned int nbytes;
u8 tweak[AES_BLOCK_SIZE];
- u8 *iv;
- struct blkcipher_walk walk;
- struct p8_aes_xts_ctx *ctx =
- crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
+ int ret;
- if (in_interrupt()) {
- SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
- skcipher_request_set_tfm(req, ctx->fallback);
- skcipher_request_set_callback(req, desc->flags, NULL, NULL);
- skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
- ret = enc? crypto_skcipher_encrypt(req) : crypto_skcipher_decrypt(req);
- skcipher_request_zero(req);
- } else {
- blkcipher_walk_init(&walk, dst, src, nbytes);
+ if (req->cryptlen < AES_BLOCK_SIZE)
+ return -EINVAL;
- ret = blkcipher_walk_virt(desc, &walk);
+ if (!crypto_simd_usable() || (req->cryptlen % XTS_BLOCK_SIZE) != 0) {
+ struct skcipher_request *subreq = skcipher_request_ctx(req);
+ *subreq = *req;
+ skcipher_request_set_tfm(subreq, ctx->fallback);
+ return enc ? crypto_skcipher_encrypt(subreq) :
+ crypto_skcipher_decrypt(subreq);
+ }
+
+ ret = skcipher_walk_virt(&walk, req, false);
+ if (ret)
+ return ret;
+
+ preempt_disable();
+ pagefault_disable();
+ enable_kernel_vsx();
+
+ aes_p8_encrypt(walk.iv, tweak, &ctx->tweak_key);
+
+ disable_kernel_vsx();
+ pagefault_enable();
+ preempt_enable();
+
+ while ((nbytes = walk.nbytes) != 0) {
preempt_disable();
pagefault_disable();
enable_kernel_vsx();
-
- iv = walk.iv;
- memset(tweak, 0, AES_BLOCK_SIZE);
- aes_p8_encrypt(iv, tweak, &ctx->tweak_key);
-
+ if (enc)
+ aes_p8_xts_encrypt(walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE),
+ &ctx->enc_key, NULL, tweak);
+ else
+ aes_p8_xts_decrypt(walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE),
+ &ctx->dec_key, NULL, tweak);
disable_kernel_vsx();
pagefault_enable();
preempt_enable();
- while ((nbytes = walk.nbytes)) {
- preempt_disable();
- pagefault_disable();
- enable_kernel_vsx();
- if (enc)
- aes_p8_xts_encrypt(walk.src.virt.addr, walk.dst.virt.addr,
- nbytes & AES_BLOCK_MASK, &ctx->enc_key, NULL, tweak);
- else
- aes_p8_xts_decrypt(walk.src.virt.addr, walk.dst.virt.addr,
- nbytes & AES_BLOCK_MASK, &ctx->dec_key, NULL, tweak);
- disable_kernel_vsx();
- pagefault_enable();
- preempt_enable();
-
- nbytes &= AES_BLOCK_SIZE - 1;
- ret = blkcipher_walk_done(desc, &walk, nbytes);
- }
+ ret = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
}
return ret;
}
-static int p8_aes_xts_encrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int p8_aes_xts_encrypt(struct skcipher_request *req)
{
- return p8_aes_xts_crypt(desc, dst, src, nbytes, 1);
+ return p8_aes_xts_crypt(req, 1);
}
-static int p8_aes_xts_decrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int p8_aes_xts_decrypt(struct skcipher_request *req)
{
- return p8_aes_xts_crypt(desc, dst, src, nbytes, 0);
+ return p8_aes_xts_crypt(req, 0);
}
-struct crypto_alg p8_aes_xts_alg = {
- .cra_name = "xts(aes)",
- .cra_driver_name = "p8_aes_xts",
- .cra_module = THIS_MODULE,
- .cra_priority = 2000,
- .cra_type = &crypto_blkcipher_type,
- .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_NEED_FALLBACK,
- .cra_alignmask = 0,
- .cra_blocksize = AES_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct p8_aes_xts_ctx),
- .cra_init = p8_aes_xts_init,
- .cra_exit = p8_aes_xts_exit,
- .cra_blkcipher = {
- .ivsize = AES_BLOCK_SIZE,
- .min_keysize = 2 * AES_MIN_KEY_SIZE,
- .max_keysize = 2 * AES_MAX_KEY_SIZE,
- .setkey = p8_aes_xts_setkey,
- .encrypt = p8_aes_xts_encrypt,
- .decrypt = p8_aes_xts_decrypt,
- }
+struct skcipher_alg p8_aes_xts_alg = {
+ .base.cra_name = "xts(aes)",
+ .base.cra_driver_name = "p8_aes_xts",
+ .base.cra_module = THIS_MODULE,
+ .base.cra_priority = 2000,
+ .base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
+ .base.cra_blocksize = AES_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct p8_aes_xts_ctx),
+ .setkey = p8_aes_xts_setkey,
+ .encrypt = p8_aes_xts_encrypt,
+ .decrypt = p8_aes_xts_decrypt,
+ .init = p8_aes_xts_init,
+ .exit = p8_aes_xts_exit,
+ .min_keysize = 2 * AES_MIN_KEY_SIZE,
+ .max_keysize = 2 * AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
};
--
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