From: Zhongfu Luo <zhongfu.luo@amlogic.com>
Date: Fri, 28 Dec 2018 08:16:28 +0000 (+0800)
Subject: defendkey: change defendkey reserved memory process [1/1]
X-Git-Tag: hardkernel-4.9.236-104~1931
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5e4a917274f47a8ee30dde66531f25b8b43db55e;p=platform%2Fkernel%2Flinux-amlogic.git

defendkey: change defendkey reserved memory process [1/1]

PD#SWPL-3706

Problem:
GXL: defenkey cause system crash

Solution:
1.change defendkey reserved memory process
2.limit reserved memory region

Verify:
GXL skt board verify pass

Change-Id: I23c6fe861803de96eccec9b643824eeae2c2e564
Signed-off-by: Zhongfu Luo <zhongfu.luo@amlogic.com>
---

diff --git a/drivers/amlogic/defendkey/defendkey.c b/drivers/amlogic/defendkey/defendkey.c
index 0a63c34..cb31ff9 100644
--- a/drivers/amlogic/defendkey/defendkey.c
+++ b/drivers/amlogic/defendkey/defendkey.c
@@ -52,6 +52,7 @@ struct defendkey_mem defendkey_rmem;
 
 #define CMD_SECURE_CHECK _IO('d', 0x01)
 #define CMD_DECRYPT_DTB  _IO('d', 0x02)
+#define DEFENDKEY_LIMIT_ADDR	0x0F000000
 
 enum e_defendkey_type {
 	e_upgrade_check = 0,
@@ -372,7 +373,6 @@ static struct class defendkey_class = {
 static int __init early_defendkey_para(char *buf)
 {
 	int ret;
-	struct page *page = NULL;
 
 	if (!buf)
 		return -EINVAL;
@@ -384,9 +384,8 @@ static int __init early_defendkey_para(char *buf)
 		return -EINVAL;
 	}
 
-	page = pfn_to_page(defendkey_rmem.base >> PAGE_SHIFT);
-	if (PageHighMem(page)) {
-		pr_err("invalid boot args \"defendkey\"\n");
+	if (defendkey_rmem.base > DEFENDKEY_LIMIT_ADDR) {
+		pr_err("defendkey reserved memory base overflow!\n");
 		return -EINVAL;
 	}