rh_kselftests_vm: kernel selftests execution in guest

Creates a new test case that executes the kernel selftests
inside the VM through the RPM that has been previously downloaded
and installed. Could be expanded with more tests in the future.

Signed-off-by: mcasquer <[email protected]>

qemu/tests/cfg/rh_kselftests_vm.cfg

@@ -0,0 +1,11 @@
+- rh_kselftests_vm:
+    only RHEL
+    type = rh_kselftests_vm
+    virt_test_type = qemu
+    kernel_path = "/home/kernel"
+    variants:
+        - mm:
+            no s390x
+            setup_hugepages = yes
+            depends_pkgs = rsync libcap-devel numactl-devel glibc-devel
+            tests_execution_cmd = "cd mm && sh run_vmtests.sh -t hugetlb"

qemu/tests/rh_kselftests_vm.py

@@ -0,0 +1,45 @@
+from virttest import error_context
+from virttest import utils_package
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    rh_kselftests_vm test
+    1) Download the current kernel selftests RPM
+    2) Extract the RPM files
+    3) Execute the kernel selftests
+    :param test: QEMU test object
+    :param params: Dictionary with the test parameters
+    :param env: Dictionary with test environment
+    """
+    vm = env.get_vm(params["main_vm"])
+    vm.verify_alive()
+    session = vm.wait_for_login()
+    kernel_path = params.get("kernel_path", "/home/kernel")
+    pkgs = params.get("depends_pkgs").split()
+    tests_execution_cmd = params.get("tests_execution_cmd")
+    if not utils_package.package_install(pkgs, session):
+        test.cancel("Install dependency packages failed")
+
+    session.cmd("mkdir -p %s" % kernel_path)
+    kernel_version = session.cmd_output("uname -r").strip().split("+")[0]
+    error_context.base_context("The kernel version: %s" % kernel_version, test.log.info)
+
+    error_context.context("Download the kernel selftests RPM", test.log.debug)
+    session.cmd("cd %s" % kernel_path)
+    session.cmd(
+        "brew download-build --rpm kernel-selftests-internal-%s.rpm" % kernel_version,
+        180,
+    )
+
+    error_context.context("Install the RPM", test.log.debug)
+    session.cmd("dnf install -y ./kernel-*")
+    session.cmd("cd /usr/libexec/kselftests")
+
+    error_context.base_context("Execute the selftests", test.log.info)
+    s, o = session.cmd_status_output(tests_execution_cmd, 180)
+    if s != 0:
+        test.fail("Error during selftests execution: %s" % o)
+
+    test.log.info("The selftests results: %s" % o)