vm_hugetlb_selftests: hugetlb kernel selftests execution in guest

Creates a new test case that executes the hugetlb selftests from
the kernel selftests package that has been previously downloaded
and extracted, to ensure the correct behavior of this feature
at the VM level.

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

qemu/tests/cfg/vm_hugetlb_selftests.cfg

@@ -0,0 +1,8 @@
+- vm_hugetlb_selftests:
+    only Linux
+    no s390x
+    type = vm_hugetlb_selftests
+    virt_test_type = qemu
+    setup_hugepages = yes
+    kernel_path = "/home/kernel"
+    depends_pkgs = rsync libcap-devel numactl-devel glibc-devel

qemu/tests/vm_hugetlb_selftests.py

@@ -0,0 +1,44 @@
+from virttest import error_context
+from virttest import utils_package
+
+
+@error_context.context_aware
+def run(test, params, env):
+    """
+    vm_hugetlb_selftests test
+    1) Download the current kernel selftests RPM
+    2) Extract the RPM files
+    3) Execute the hugetlb 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.objects("depends_pkgs")
+    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/mm")
+
+    error_context.base_context("Execute the hugetlb selftests", test.log.info)
+    s, o = session.cmd_status_output("sh run_vmtests.sh -t hugetlb", 180)
+    if s != 0:
+        test.fail("Error during hugetlb selftests execution: %s" % o)
+
+    error_context.context("The hugeltb tests results: %s" % o, test.log.debug)