auto_patch/common15-6.6/common/05_boottime/0001-boottime-reduce-boot-time-1-1.patch

From 377fc09732057019f0436ea574e99491a680e01f Mon Sep 17 00:00:00 2001
From: "song.han" <song.han@amlogic.com>
Date: Wed, 23 Feb 2022 14:20:28 +0800
Subject: [PATCH] boottime: reduce boot time [1/1]

PD#SWPL-71744
PD#SWPL-52793

Problem:
1. jitter rng is doing 1024 rounds of tests and causing
long initialization time.
2. add sysfs params too slow, kernel bootup block 1 hour in pxp.

Solution:
1. change jent_mod_int to delaywork to reduce boot time.
2. use async add sysfs params to reduce boot time.

Verify:
c2_af400

Signed-off-by: song.han <song.han@amlogic.com>
Signed-off-by: yao zhang1 <yao.zhang1@amlogic.com>
Change-Id: I90e67854b213dd673077c72bb4830264d17f1f88
---
 crypto/jitterentropy-kcapi.c | 27 +++++++++++++++++++++++++++
 kernel/params.c              | 12 ++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/crypto/jitterentropy-kcapi.c b/crypto/jitterentropy-kcapi.c
index 7d1463a1562a..6098e8c80628 100644
--- a/crypto/jitterentropy-kcapi.c
+++ b/crypto/jitterentropy-kcapi.c
@@ -318,6 +318,32 @@ static struct rng_alg jent_alg = {
 	}
 };
 
+#if IS_ENABLED(CONFIG_AMLOGIC_BOOT_TIME)
+static struct delayed_work jent_work;
+static void __jent_mod_init(struct work_struct *work)
+{
+	int ret = 0;
+
+	ret = jent_entropy_init();
+	if (ret) {
+		pr_info("jitterentropy: Initialization failed with : %d\n", ret);
+		return;
+	}
+	ret = crypto_register_rng(&jent_alg);
+	if (ret) {
+		pr_err("registering jent_alg failed: %d\n", ret);
+		return;
+	}
+}
+
+static int __init jent_mod_init(void)
+{
+	INIT_DELAYED_WORK(&jent_work, __jent_mod_init);
+	schedule_delayed_work(&jent_work, msecs_to_jiffies(1000));
+
+	return 0;
+}
+#else
 static int __init jent_mod_init(void)
 {
 	SHASH_DESC_ON_STACK(desc, tfm);
@@ -348,6 +374,7 @@ static int __init jent_mod_init(void)
 	}
 	return crypto_register_rng(&jent_alg);
 }
+#endif
 
 static void __exit jent_mod_exit(void)
 {
diff --git a/kernel/params.c b/kernel/params.c
index 2d4a0564697e..deac97a77122 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -973,6 +973,14 @@ static int __init param_sysfs_init(void)
 }
 subsys_initcall(param_sysfs_init);
 
+#if IS_ENABLED(CONFIG_AMLOGIC_BOOT_TIME)
+static void __init async_param_sysfs_builtin(void *data, async_cookie_t cookie)
+{
+	version_sysfs_builtin();
+	param_sysfs_builtin();
+}
+#endif
+
 /*
  * param_sysfs_builtin_init - add sysfs version and parameter
  * attributes for built-in modules
@@ -982,8 +990,12 @@ static int __init param_sysfs_builtin_init(void)
 	if (!module_kset)
 		return -ENOMEM;
 
+#if IS_ENABLED(CONFIG_AMLOGIC_BOOT_TIME)
+	async_schedule(async_param_sysfs_builtin, NULL);
+#else
 	version_sysfs_builtin();
 	param_sysfs_builtin();
+#endif
 
 	return 0;
 }
-- 
2.42.0