From 430846df59cd521f4a294cc79084307b490a636b Mon Sep 17 00:00:00 2001
From: Brian Smith <brian@briansmith.org>
Date: Wed, 19 Jun 2024 16:22:26 -0700
Subject: [PATCH] Use QEMU to test CPUs without AES-NI.

---
 .github/workflows/ci.yml  | 14 +++++++++++++-
 mk/cargo.sh               | 10 ++++++++++
 mk/install-build-tools.sh |  8 ++++++++
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7ca2079aa0..d617dbc3b1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -601,6 +601,12 @@ jobs:
           - target: i686-unknown-linux-gnu
             host_os: ubuntu-22.04
 
+          - target: i686-unknown-linux-gnu
+            mode: # debug
+            rust_channel: nightly
+            host_os: ubuntu-22.04
+            cpu_model: Conroe-v1
+
           - target: powerpc-unknown-linux-gnu
             host_os: ubuntu-22.04
 
@@ -619,6 +625,12 @@ jobs:
           - target: x86_64-apple-darwin
             host_os: macos-13
 
+          - target: x86_64-unknown-linux-gnu
+            mode: # debug
+            rust_channel: nightly
+            host_os: ubuntu-22.04
+            cpu_model: Conroe-v1
+
           - target: x86_64-unknown-linux-musl
             host_os: ubuntu-22.04
 
@@ -638,7 +650,7 @@ jobs:
 
       - if: ${{ !contains(matrix.host_os, 'windows') }}
         run: |
-          RING_COVERAGE=1 mk/cargo.sh +${{ matrix.rust_channel }} test -vv --target=${{ matrix.target }} ${{ matrix.cargo_options }} ${{ matrix.features }} ${{ matrix.mode }}
+          RING_CPU_MODEL=${{ matrix.cpu_model }} RING_COVERAGE=1 mk/cargo.sh +${{ matrix.rust_channel }} test -vv --target=${{ matrix.target }} ${{ matrix.cargo_options }} ${{ matrix.features }} ${{ matrix.mode }}
 
       - uses: briansmith/codecov-codecov-action@v4
         with:
diff --git a/mk/cargo.sh b/mk/cargo.sh
index e259171a1b..ab3f9f05ee 100755
--- a/mk/cargo.sh
+++ b/mk/cargo.sh
@@ -31,6 +31,8 @@ qemu_powerpc64le="qemu-ppc64le -L /usr/powerpc64le-linux-gnu"
 qemu_riscv64="qemu-riscv64 -L /usr/riscv64-linux-gnu"
 qemu_s390x="qemu-s390x -L /usr/s390x-linux-gnu"
 qemu_sparc64="qemu-sparc64 -L /usr/sparc64-linux-gnu"
+qemu_x86="qemu-i386"
+qemu_x86_64="qemu-x86_64"
 
 # Avoid putting the Android tools in `$PATH` because there are tools in this
 # directory like `clang` that would conflict with the same-named tools that may
@@ -110,6 +112,9 @@ case $target in
   i686-unknown-linux-gnu)
     use_clang=1
     export CARGO_TARGET_I686_UNKNOWN_LINUX_GNU_LINKER=clang-$llvm_version
+    if [ -n "${RING_CPU_MODEL-}" ]; then
+      export CARGO_TARGET_I686_UNKNOWN_LINUX_GNU_RUNNER="$qemu_x86 -cpu ${RING_CPU_MODEL}"
+    fi
     ;;
   i686-unknown-linux-musl)
     use_clang=1
@@ -176,6 +181,11 @@ case $target in
     export CARGO_TARGET_SPARC64_UNKNOWN_LINUX_GNU_LINKER=sparc64-linux-gnu-gcc
     export CARGO_TARGET_SPARC64_UNKNOWN_LINUX_GNU_RUNNER="$qemu_sparc64"
     ;;
+  x86_64-unknown-linux-gnu)
+    if [ -n "${RING_CPU_MODEL-}" ]; then
+      export CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER="$qemu_x86_64 -cpu ${RING_CPU_MODEL}"
+    fi
+    ;;
   x86_64-unknown-linux-musl)
     use_clang=1
     # XXX: Work around https://github.com/rust-lang/rust/issues/79555.
diff --git a/mk/install-build-tools.sh b/mk/install-build-tools.sh
index bbe6104c88..81fd9ed1ba 100755
--- a/mk/install-build-tools.sh
+++ b/mk/install-build-tools.sh
@@ -98,6 +98,9 @@ i686-unknown-linux-gnu)
   install_packages \
     gcc-multilib \
     libc6-dev-i386
+  if [ -n "${RING_CPU_MODEL-}" ]; then
+    install_packages qemu-user
+  fi
   ;;
 i686-unknown-linux-musl|x86_64-unknown-linux-musl)
   use_clang=1
@@ -183,6 +186,11 @@ wasm32-wasi)
       https://github.com/briansmith/ring-toolchain \
       target/tools/linux-x86_64
   ;;
+x86_64-unknown-linux-gnu)
+  if [ -n "${RING_CPU_MODEL-}" ]; then
+    install_packages qemu-user
+  fi
+  ;;
 *)
   ;;
 esac