From 1e8ad16b354bc3f8ee944803561d290a602db048 Mon Sep 17 00:00:00 2001
From: longjin <longjin@DragonOS.org>
Date: Thu, 5 Jun 2025 14:14:36 +0800
Subject: [PATCH 1/2] refactor(console): optimize buffer allocation with
 explicit type

Signed-off-by: longjin <longjin@DragonOS.org>
---
 src/device/console.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/device/console.rs b/src/device/console.rs
index fe1d996..a6e673f 100644
--- a/src/device/console.rs
+++ b/src/device/console.rs
@@ -7,6 +7,8 @@ use crate::volatile::{volread, ReadOnly, WriteOnly};
 use crate::{Result, PAGE_SIZE};
 use alloc::boxed::Box;
 use bitflags::bitflags;
+use alloc::vec;
+use core::convert::TryInto;
 use core::ptr::NonNull;
 
 const QUEUE_RECEIVEQ_PORT_0: u16 = 0;
@@ -83,7 +85,7 @@ impl<H: Hal, T: Transport> VirtIOConsole<H, T> {
         // Safe because no alignment or initialisation is required for [u8], the DMA buffer is
         // dereferenceable, and the lifetime of the reference matches the lifetime of the DMA buffer
         // (which we don't otherwise access).
-        let queue_buf_rx = Box::new([0; PAGE_SIZE]);
+        let queue_buf_rx: Box<[u8; 4096]> = vec![0u8; PAGE_SIZE].into_boxed_slice().try_into().unwrap();
 
         transport.finish_init();
         let mut console = VirtIOConsole {

From bd37bc20bbcd1ccf9b6d3fdbba9abef1fc14916a Mon Sep 17 00:00:00 2001
From: longjin <longjin@DragonOS.org>
Date: Thu, 5 Jun 2025 14:16:36 +0800
Subject: [PATCH 2/2] feat: add optional logging support with 'log' and
 'fake-log' features

Add optional logging dependencies and features to enable runtime logging.
Make 'fake-log' feature part of default build.

Signed-off-by: longjin <longjin@DragonOS.org>
---
 Cargo.toml | 7 +++++--
 src/lib.rs | 6 ++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index b12ddf8..8309246 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,12 +15,15 @@ keywords = ["virtio"]
 categories = ["hardware-support", "no-std"]
 
 [dependencies]
-log = "0.4"
+fake-log = { version = "0.1", optional = true }
+log = { version = "0.4", optional = true }
 bitflags = "2.3.0"
 zerocopy = { version = "0.7.5", features = ["derive"] }
 
 [features]
-default = ["alloc"]
+default = ["alloc", "fake-log"]
+log = ["dep:log"]
+fake-log = ["dep:fake-log"]
 alloc = ["zerocopy/alloc"]
 
 [dev-dependencies]
diff --git a/src/lib.rs b/src/lib.rs
index f2f2f12..42f1241 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -49,6 +49,12 @@
 #[cfg(any(feature = "alloc", test))]
 extern crate alloc;
 
+#[cfg(feature = "fake-log")]
+extern crate fake_log as log;
+
+#[cfg(feature = "log")]
+extern crate log;
+
 pub mod device;
 mod hal;
 mod queue;