From 75bd6fc2947e1235cbc4da679f11859d2f85ce4c Mon Sep 17 00:00:00 2001
From: Yesh <yesh@aliyun.com>
Date: Mon, 3 Oct 2022 12:40:04 +0800
Subject: [PATCH] Fix page faults on QEMU

---
 src/paging/page_table.rs | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/src/paging/page_table.rs b/src/paging/page_table.rs
index 56896fe2..f52f53cc 100644
--- a/src/paging/page_table.rs
+++ b/src/paging/page_table.rs
@@ -125,9 +125,7 @@ impl PTE for PageTableEntryX32 {
     fn frame<T: PhysicalAddress>(&self) -> FrameWith<T> {
         FrameWith::of_addr(self.addr())
     }
-    fn set<T: PhysicalAddress>(&mut self, frame: FrameWith<T>, mut flags: PageTableFlags) {
-        // U540 will raise page fault when accessing page with A=0 or D=0
-        flags |= EF::ACCESSED | EF::DIRTY;
+    fn set<T: PhysicalAddress>(&mut self, frame: FrameWith<T>, flags: PageTableFlags) {
         self.0 = ((frame.number() << 10) | flags.bits()) as u32;
     }
     fn flags_mut(&mut self) -> &mut PageTableFlags {
@@ -169,9 +167,7 @@ impl PTE for PageTableEntryX64 {
     fn frame<T: PhysicalAddress>(&self) -> FrameWith<T> {
         FrameWith::of_addr(self.addr())
     }
-    fn set<T: PhysicalAddress>(&mut self, frame: FrameWith<T>, mut flags: PageTableFlags) {
-        // U540 will raise page fault when accessing page with A=0 or D=0
-        flags |= EF::ACCESSED | EF::DIRTY;
+    fn set<T: PhysicalAddress>(&mut self, frame: FrameWith<T>, flags: PageTableFlags) {
         self.0 = ((frame.number() << 10) | flags.bits()) as u64;
     }
     fn flags_mut(&mut self) -> &mut PageTableFlags {
@@ -248,5 +244,3 @@ bitflags! {
         const RESERVED2 =   1 << 9;
     }
 }
-
-type EF = PageTableFlags;