build: Bump MSRV to 1.87.0

rustc 1.90.0-beta.1 (788da80fc 2025-08-04) suggests using library
feature `unsigned_is_multiple_of`. It is stabled in Rust 1.87.0.

Update image to 20250807-0 since MSRV in Dockerfile is updated.

Signed-off-by: Songqian Li <sionli@tencent.com>
Signed-off-by: Bo Chen <bchen@crusoe.ai>

.github/workflows/build.yaml

@@ -15,7 +15,7 @@ jobs:
           - stable
           - beta
           - nightly
-          - "1.83.0"
+          - "1.87.0"
         target:
           - x86_64-unknown-linux-gnu
           - x86_64-unknown-linux-musl

.github/workflows/docker-image.yaml

@@ -41,7 +41,7 @@ jobs:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           # generate Docker tags based on the following events/attributes
           tags: |
-            type=raw,value=20250412-0
+            type=raw,value=20250807-0
             type=sha
 
       - name: Build and push

.github/workflows/preview-riscv64.yaml

@@ -24,7 +24,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install Rust toolchain
-        run: /opt/scripts/exec-in-qemu.sh rustup default 1.83.0
+        run: /opt/scripts/exec-in-qemu.sh rustup default 1.87.0
 
       - name: Build ${{ matrix.module }} Module (kvm)
         run: /opt/scripts/exec-in-qemu.sh cargo rustc --locked -p ${{ matrix.module }} --no-default-features --features "kvm" -- -D warnings -D clippy::undocumented_unsafe_blocks -W clippy::assertions_on_result_states

.github/workflows/release.yaml

@@ -45,7 +45,7 @@ jobs:
           target: ${{ matrix.platform.target }}
           args: ${{ matrix.platform.args  }}
           strip: true
-          toolchain: "1.83.0"
+          toolchain: "1.87.0"
       - name: Copy Release Binaries
         if: github.event_name == 'create' && github.event.ref_type == 'tag'
         shell: bash

Cargo.toml

@@ -15,7 +15,7 @@ version = "47.0.0"
 # a.) A dependency requires it,
 # b.) If we want to use a new feature and that MSRV is at least 6 months old,
 # c.) There is a security issue that is addressed by the toolchain update.
-rust-version = "1.83.0"
+rust-version = "1.87.0"
 
 [profile.release]
 codegen-units = 1

resources/Dockerfile

@@ -8,7 +8,7 @@
 FROM ubuntu:24.04 AS dev
 
 ARG TARGETARCH
-ARG RUST_TOOLCHAIN="1.83.0"
+ARG RUST_TOOLCHAIN="1.87.0"
 ARG CLH_SRC_DIR="/cloud-hypervisor"
 ARG CLH_BUILD_DIR="$CLH_SRC_DIR/build"
 ARG CARGO_REGISTRY_DIR="$CLH_BUILD_DIR/cargo_registry"

scripts/dev_cli.sh

@@ -9,7 +9,7 @@ CLI_NAME="Cloud Hypervisor"
 CTR_IMAGE_TAG="ghcr.io/cloud-hypervisor/cloud-hypervisor"
 
 # Needs to match explicit version in docker-image.yaml workflow
-CTR_IMAGE_VERSION="20250412-0"
+CTR_IMAGE_VERSION="20250807-0"
 : "${CTR_IMAGE:=${CTR_IMAGE_TAG}:${CTR_IMAGE_VERSION}}"
 
 DOCKER_RUNTIME="docker"