[PATCH v3 4/4] selftests: liveupdate: Add riscv support

[Chen Pei <cp0613@linux.alibaba.com>]

Teach the live update vmtest runners about riscv64, so the LUO tests can
be run on this architecture.

LIVEUPDATE depends only on KEXEC_HANDOVER, enabled for riscv64 by the
previous commit, so nothing in the tests stood in the way.

Signed-off-by: Chen Pei <cp0613@linux.alibaba.com>
---

Test: qemu-system-riscv64 (virt, -cpu max, -m 1G, -smp 2, TCG), in-tree
runner "tools/testing/selftests/liveupdate/vmtest.sh -t riscv64 -T <suite>",
all four suites:

  ok 1 luo_kexec_simple succeeded
  ok 1 luo_multi_session succeeded
  ok 1 luo_stress_files succeeded
  ok 1 luo_stress_sessions succeeded

each with "# Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0". The
simple suite's serial log shows the handover round trip:

  KHO: found kexec handover data.
  luo: Retrieved live update data, liveupdate number: 1
  # [STAGE 2] Test data verified successfully.
  --- SIMPLE KEXEC TEST PASSED ---

 tools/testing/selftests/liveupdate/config.riscv64 | 3 +++
 tools/testing/selftests/liveupdate/run-vmtests.sh | 2 +-
 tools/testing/selftests/liveupdate/vmtest.sh      | 8 +++++++-
 3 files changed, 11 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/liveupdate/config.riscv64

diff --git a/tools/testing/selftests/liveupdate/config.riscv64 b/tools/testing/selftests/liveupdate/config.riscv64
new file mode 100644
index 000000000000..edbc551199b0
--- /dev/null
+++ b/tools/testing/selftests/liveupdate/config.riscv64
@@ -0,0 +1,3 @@
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
diff --git a/tools/testing/selftests/liveupdate/run-vmtests.sh b/tools/testing/selftests/liveupdate/run-vmtests.sh
index 6f592aec0f85..c3d828cfd63b 100755
--- a/tools/testing/selftests/liveupdate/run-vmtests.sh
+++ b/tools/testing/selftests/liveupdate/run-vmtests.sh
@@ -4,7 +4,7 @@
 SCRIPT_DIR=$(dirname "$(realpath "$0")")
 TEST_RUNNER="$SCRIPT_DIR/vmtest.sh"
 
-TARGETS=("x86_64" "aarch64")
+TARGETS=("x86_64" "aarch64" "riscv64")
 
 GREEN='\033[0;32m'
 RED='\033[0;31m'
diff --git a/tools/testing/selftests/liveupdate/vmtest.sh b/tools/testing/selftests/liveupdate/vmtest.sh
index dea5a6fb2abc..70a8d978077a 100755
--- a/tools/testing/selftests/liveupdate/vmtest.sh
+++ b/tools/testing/selftests/liveupdate/vmtest.sh
@@ -25,6 +25,10 @@ function get_arch_conf() {
 		QEMU_CMD="qemu-system-x86_64"
 		KERNEL_IMAGE="bzImage"
 		KERNEL_CMDLINE="console=ttyS0"
+	elif [[ "$arch" == "riscv" ]]; then
+		QEMU_CMD="qemu-system-riscv64 -M virt -cpu max"
+		KERNEL_IMAGE="Image"
+		KERNEL_CMDLINE="console=ttyS0"
 	else
 		echo "Unsupported architecture: $arch"
 		exit 1
@@ -37,7 +41,7 @@ $0 [-d build_dir] [-j jobs] [-t target_arch] [-T test_name] [-w workspace_dir] [
 Options:
 	-d)	path to the kernel build directory (default: .luo_test_build.<arch>)
 	-j)	number of jobs for compilation
-	-t)	run test for target_arch (aarch64, x86_64)
+	-t)	run test for target_arch (aarch64, x86_64, riscv64)
 	-T)	test name to run (default: luo_kexec_simple)
 	-w)	custom workspace directory (default: creates temp dir)
 	-k)	keep workspace directory
@@ -87,6 +91,7 @@ function detect_cross_compile() {
 	case "$target" in
 		aarch64) candidate="aarch64-linux-gnu-" ;;
 		x86_64)  candidate="x86_64-linux-gnu-" ;;
+		riscv64) candidate="riscv64-linux-gnu-" ;;
 		*)       skip "Auto-detection for target '$target' not supported. Please set CROSS_COMPILE manually." ;;
 	esac
 
@@ -194,6 +199,7 @@ function target_to_arch() {
 	case $target in
 	     aarch64) echo "arm64" ;;
 	     x86_64) echo "x86" ;;
+	     riscv64) echo "riscv" ;;
 	     *) skip "architecture $target is not supported"
 	esac
 }
-- 
2.50.1