This patch adds routines supporting VMX instructions on the
Power 8.
Signed-off-by: Leonidas S. Barbosa <leosilva@xxxxxxxxxxxxxxxxxx>
---
drivers/crypto/vmx/vmx.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
create mode 100644 drivers/crypto/vmx/vmx.c
diff --git a/drivers/crypto/vmx/vmx.c b/drivers/crypto/vmx/vmx.c
new file mode 100644
index 0000000..44d8d5c
--- /dev/null
+++ b/drivers/crypto/vmx/vmx.c
@@ -0,0 +1,88 @@
+/**
+ * Routines supporting VMX instructions on the 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 Foundation; 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 or FITNESS FOR A PARTICULAR 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: Marcelo Henrique Cerri <mhcerri@xxxxxxxxxx>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/crypto.h>
+#include <asm/cputable.h>
+#include <crypto/internal/hash.h>
+
+extern struct shash_alg p8_ghash_alg;
+extern struct crypto_alg p8_aes_alg;
+extern struct crypto_alg p8_aes_cbc_alg;
+extern struct crypto_alg p8_aes_ctr_alg;
+static struct crypto_alg *algs[] = {
+ &p8_aes_alg,
+ &p8_aes_cbc_alg,
+ &p8_aes_ctr_alg,
+ NULL,
+};
+
+int __init p8_init(void)
+{
+ int ret = 0;
+ struct crypto_alg **alg_it;
+
+ if (!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO))
+ return -ENODEV;
+
+ for (alg_it = algs; *alg_it; alg_it++) {
+ ret = crypto_register_alg(*alg_it);
+ printk(KERN_INFO "crypto_register_alg '%s' = %d\n",
+ (*alg_it)->cra_name, ret);
+ if (ret) {
+ for (alg_it--; alg_it >= algs; alg_it--)
+ crypto_unregister_alg(*alg_it);
+ break;
+ }
+ }
+ if (ret)
+ return ret;
+
+ ret = crypto_register_shash(&p8_ghash_alg);
+ if (ret) {
+ for (alg_it = algs; *alg_it; alg_it++)
+ crypto_unregister_alg(*alg_it);
+ }
+ return ret;
+}
+
+void __exit p8_exit(void)
+{
+ struct crypto_alg **alg_it;
+
+ for (alg_it = algs; *alg_it; alg_it++) {
+ printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name);
+ crypto_unregister_alg(*alg_it);
+ }
+ crypto_unregister_shash(&p8_ghash_alg);
+}
+
+module_init(p8_init);
+module_exit(p8_exit);
+
+MODULE_AUTHOR("Marcelo Cerri<mhcerri@xxxxxxxxxx>");
+MODULE_DESCRIPTION("IBM VMX cryptogaphic acceleration instructions support on Power 8");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0.0");
+
--
2.1.0
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