rust/pl011: Fix range checks for device ID accesses

The peripheral and PrimeCell identification registers of pl011 are located at
offset 0xFE0 - 0xFFC. To check if a read falls to such registers, the C
implementation checks if the offset-shifted-by-2 (not the offset itself) is in
the range 0x3F8 - 0x3FF.

Use the same check in the Rust implementation.

This fixes the timeout of the following avocado tests:

  * tests/avocado/boot_linux_console.py:BootLinuxConsole.test_arm_virt
  * tests/avocado/replay_kernel.py:ReplayKernelNormal.test_arm_virt
  * tests/avocado/replay_kernel.py:ReplayKernelNormal.test_arm_vexpressa9

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Junjie Mao <junjie.mao@hotmail.com>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <SY0P300MB102644C4AC34A3AAD75DC4D5955C2@SY0P300MB1026.AUSP300.PROD.OUTLOOK.COM>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20241121165806.476008-39-alex.bennee@linaro.org>

diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index 2a85960b81fa1f56b43f13c6bdb09a5b53d6c3fa..476cacc8449330707842f9c8bdcc1343331215d7 100644 (file)
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -182,7 +182,7 @@ impl PL011State {
         use RegisterOffset::*;
 
         std::ops::ControlFlow::Break(match RegisterOffset::try_from(offset) {
-            Err(v) if (0x3f8..0x400).contains(&v) => {
+            Err(v) if (0x3f8..0x400).contains(&(v >> 2)) => {
                 u64::from(self.device_id[(offset - 0xfe0) >> 2])
             }
             Err(_) => {