cloud-hypervisor/unsafe-device-attr.patch

From 838a8573115efc344648efac29e07ccaa2d008fa Mon Sep 17 00:00:00 2001
From: Ruoqing He <heruoqing@iscas.ac.cn>
Date: Mon, 4 Nov 2024 15:04:36 +0800
Subject: [PATCH] hypervisor: Wrap get_device_attr with unsafe

`get_device_attr` in 0.19.0 kvm-ioctls is marked as unsafe, wrap
invokation of `get_device_attr` with `unsafe` block.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>
---
 hypervisor/src/kvm/aarch64/gic/dist_regs.rs   | 6 ++----
 hypervisor/src/kvm/aarch64/gic/icc_regs.rs    | 3 +--
 hypervisor/src/kvm/aarch64/gic/mod.rs         | 9 +++------
 hypervisor/src/kvm/aarch64/gic/redist_regs.rs | 3 +--
 4 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/hypervisor/src/kvm/aarch64/gic/dist_regs.rs b/hypervisor/src/kvm/aarch64/gic/dist_regs.rs
index 8c4809476c..9135ad0031 100644
--- a/hypervisor/src/kvm/aarch64/gic/dist_regs.rs
+++ b/hypervisor/src/kvm/aarch64/gic/dist_regs.rs
@@ -103,9 +103,8 @@ fn dist_attr_get(gic: &DeviceFd, offset: u32) -> Result<u32> {
         flags: 0,
     };
 
-    // get_device_attr should be marked as unsafe, and will be in future.
     // SAFETY: gic_dist_attr.addr is safe to write to.
-    gic.get_device_attr(&mut gic_dist_attr).map_err(|e| {
+    unsafe { gic.get_device_attr(&mut gic_dist_attr) }.map_err(|e| {
         Error::GetDeviceAttribute(HypervisorDeviceError::GetDeviceAttribute(e.into()))
     })?;
 
@@ -131,9 +130,8 @@ fn get_interrupts_num(gic: &DeviceFd) -> Result<u32> {
         addr: &mut num_irq as *mut u32 as u64,
         flags: 0,
     };
-    // get_device_attr should be marked as unsafe, and will be in future.
     // SAFETY: nr_irqs_attr.addr is safe to write to.
-    gic.get_device_attr(&mut nr_irqs_attr).map_err(|e| {
+    unsafe { gic.get_device_attr(&mut nr_irqs_attr) }.map_err(|e| {
         Error::GetDeviceAttribute(HypervisorDeviceError::GetDeviceAttribute(e.into()))
     })?;
     Ok(num_irq)
diff --git a/hypervisor/src/kvm/aarch64/gic/icc_regs.rs b/hypervisor/src/kvm/aarch64/gic/icc_regs.rs
index 24fba17278..f993581840 100644
--- a/hypervisor/src/kvm/aarch64/gic/icc_regs.rs
+++ b/hypervisor/src/kvm/aarch64/gic/icc_regs.rs
@@ -105,9 +105,8 @@ fn icc_attr_get(gic: &DeviceFd, offset: u64, typer: u64) -> Result<u32> {
         flags: 0,
     };
 
-    // get_device_attr should be marked as unsafe, and will be in future.
     // SAFETY: gic_icc_attr.addr is safe to write to.
-    gic.get_device_attr(&mut gic_icc_attr).map_err(|e| {
+    unsafe { gic.get_device_attr(&mut gic_icc_attr) }.map_err(|e| {
         Error::GetDeviceAttribute(HypervisorDeviceError::GetDeviceAttribute(e.into()))
     })?;
 
diff --git a/hypervisor/src/kvm/aarch64/gic/mod.rs b/hypervisor/src/kvm/aarch64/gic/mod.rs
index eead0da7df..9b8b8668e3 100644
--- a/hypervisor/src/kvm/aarch64/gic/mod.rs
+++ b/hypervisor/src/kvm/aarch64/gic/mod.rs
@@ -49,13 +49,10 @@ fn gicv3_its_attr_get(its_device: &DeviceFd, group: u32, attr: u32) -> Result<u6
         flags: 0,
     };
 
-    // get_device_attr should be marked as unsafe, and will be in future.
     // SAFETY: gicv3_its_attr.addr is safe to write to.
-    its_device
-        .get_device_attr(&mut gicv3_its_attr)
-        .map_err(|e| {
-            Error::GetDeviceAttribute(HypervisorDeviceError::GetDeviceAttribute(e.into()))
-        })?;
+    unsafe { its_device.get_device_attr(&mut gicv3_its_attr) }.map_err(|e| {
+        Error::GetDeviceAttribute(HypervisorDeviceError::GetDeviceAttribute(e.into()))
+    })?;
 
     Ok(val)
 }
diff --git a/hypervisor/src/kvm/aarch64/gic/redist_regs.rs b/hypervisor/src/kvm/aarch64/gic/redist_regs.rs
index c1803a12fa..13f7cffc4d 100644
--- a/hypervisor/src/kvm/aarch64/gic/redist_regs.rs
+++ b/hypervisor/src/kvm/aarch64/gic/redist_regs.rs
@@ -121,9 +121,8 @@ fn redist_attr_get(gic: &DeviceFd, offset: u32, typer: u64) -> Result<u32> {
         flags: 0,
     };
 
-    // get_device_attr should be marked as unsafe, and will be in future.
     // SAFETY: gic_redist_attr.addr is safe to write to.
-    gic.get_device_attr(&mut gic_redist_attr).map_err(|e| {
+    unsafe { gic.get_device_attr(&mut gic_redist_attr) }.map_err(|e| {
         Error::GetDeviceAttribute(HypervisorDeviceError::GetDeviceAttribute(e.into()))
     })?;