vm_hugetlb_selftests: hugetlb kernel selftests execution in guest

Creates a new test case that downloads the current kernel source RPM,
extracts the files, compiles the mm selftests and executes the
hugetlb selftests 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
+    only x86_64
+    type = vm_hugetlb_selftests
+    virt_test_type = qemu
+    setup_hugepages = yes
+    depends_pkgs = rsync libcap-devel numactl-devel glibc-devel
+    kernel_path = "/home/kernel"

qemu/tests/vm_hugetlb_selftests.py

@@ -0,0 +1,49 @@
+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 source RPM
+    2) Extract the RPM files
+    3) Extract the linux package and compile the mm selftests
+    4) Execute the higetlb 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")
+    vm_arch = params["vm_arch_name"]
+    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").split(vm_arch)[0]
+    error_context.base_context("The kernel version: %s" % kernel_version, test.log.info)
+
+    error_context.context("Download the kernel source RPM", test.log.debug)
+    session.cmd("cd %s" % kernel_path)
+    session.cmd("brew download-build --rpm kernel-%ssrc.rpm" % kernel_version, 180)
+
+    error_context.context("Extract the RPM files", test.log.debug)
+    session.cmd("rpm2cpio kernel-*.rpm | cpio -div")
+    session.cmd("tar -xvf linux-*.tar.xz")
+    session.cmd("cd linux-*/tools/testing/selftests/mm")
+
+    error_context.base_context("Compile the mm selftests", test.log.info)
+    s, o = session.cmd_status_output("make")
+    if s != 0:
+        test.fail("Error during mm selftests compilation: %s" % o)
+
+    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)