diff --git a/.github/workflows/doc-and-test.yml b/.github/workflows/doc-and-test.yml
index 26524710..91927a3d 100644
--- a/.github/workflows/doc-and-test.yml
+++ b/.github/workflows/doc-and-test.yml
@@ -9,37 +9,57 @@ jobs:
   build-doc:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly-2022-04-11
+          components: rust-src, llvm-tools-preview
+          target: riscv64gc-unknown-none-elf
       - name: Build doc
-        run: |
-          rustup target add riscv64gc-unknown-none-elf
-          rustup component add llvm-tools-preview
-          rustup component add rust-src
-          cd os
-          cargo doc --no-deps --verbose
+        run: cd os && cargo doc --no-deps --verbose
       - name: Deploy to Github Pages
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./os/target/riscv64gc-unknown-none-elf/doc
           destination_dir: ${{ github.ref_name }}
+
   run-tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly-2022-04-11
+          components: rust-src, llvm-tools-preview
+          target: riscv64gc-unknown-none-elf
+      - uses: actions-rs/install@v0.1
+        with:
+          crate: cargo-binutils
+          version: latest
+          use-tool-cache: true
+      - name: Cache QEMU
+        uses: actions/cache@v3
+        with:
+          path: qemu-7.0.0
+          key: qemu-7.0.0-x86_64-riscv64
       - name: Install QEMU
         run: |
           sudo apt-get update
           sudo apt-get install ninja-build -y
-          [ ! -d qemu-6.1.0 ] && wget https://download.qemu.org/qemu-6.1.0.tar.xz \
-            && tar xJf qemu-6.1.0.tar.xz > /dev/null \
-            && cd qemu-6.1.0 && ./configure --target-list=riscv64-softmmu && cd ..
-          cd qemu-6.1.0 && sudo make install -j
+          if [ ! -d qemu-7.0.0 ]; then
+            wget https://download.qemu.org/qemu-7.0.0.tar.xz
+            tar -xf qemu-7.0.0.tar.xz
+            cd qemu-7.0.0
+            ./configure --target-list=riscv64-softmmu
+            make -j
+          else
+            cd qemu-7.0.0
+          fi
+          sudo make install
           qemu-system-riscv64 --version
-      - name: Run usertests
-        run: |
-          cd os && make run TEST=1
-          
 
-          
-      
\ No newline at end of file
+      - name: Run usertests
+        run: cd os && make run TEST=1
diff --git a/.gitignore b/.gitignore
index 80614cf9..f411b223 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,18 +1,13 @@
-.idea/*
-os/target/*
-os/.idea/*
+.*/*
+!.github/*
+!.vscode/settings.json
+
+**/target/
+**/Cargo.lock
+
 os/src/link_app.S
 os/src/linker.ld
 os/last-*
-os/Cargo.lock
-os/last-*
 os/.gdb_history
-user/target/*
-user/.idea/*
-user/Cargo.lock
-easy-fs/Cargo.lock
-easy-fs/target/*
-easy-fs-fuse/Cargo.lock
-easy-fs-fuse/target/*
 tools/
 pushall.sh
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 00000000..11de1111
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,10 @@
+{
+    // Prevent "can't find crate for `test`" error on no_std
+    // Ref: https://github.com/rust-lang/vscode-rust/issues/729
+    // For vscode-rust plugin users:
+    "rust.target": "riscv64gc-unknown-none-elf",
+    "rust.all_targets": false,
+    // For Rust Analyzer plugin users:
+    "rust-analyzer.cargo.target": "riscv64gc-unknown-none-elf",
+    "rust-analyzer.checkOnSave.allTargets": false
+}