| #!/usr/bin/env python3 |
| # |
| # Functional tests exercising guest KVM file descriptor change on reset. |
| # |
| # Copyright © 2026 Red Hat, Inc. |
| # |
| # Author: |
| # Ani Sinha <anisinha@redhat.com> |
| # |
| # SPDX-License-Identifier: GPL-2.0-or-later |
| |
| import os |
| from qemu.machine import machine |
| |
| from qemu_test import QemuSystemTest, Asset, exec_command_and_wait_for_pattern |
| from qemu_test import wait_for_console_pattern |
| |
| class KVMGuest(QemuSystemTest): |
| |
| # ASSET UKI was generated using |
| # https://gitlab.com/kraxel/edk2-tests/-/blob/unittest/tools/make-supermin.sh |
| ASSET_UKI = Asset('https://gitlab.com/anisinha/misc-artifacts/' |
| '-/raw/main/uki.x86-64.efi?ref_type=heads', |
| 'e0f806bd1fa24111312e1fe849d2ee69808d4343930a5' |
| 'dc8c1688da17c65f576') |
| # ASSET_OVMF comes from /usr/share/edk2/ovmf/OVMF.stateless.fd of a |
| # fedora core 43 distribution which in turn comes from the |
| # edk2-ovmf-20251119-3.fc43.noarch rpm of that distribution. |
| ASSET_OVMF = Asset('https://gitlab.com/anisinha/misc-artifacts/' |
| '-/raw/main/OVMF.stateless.fd?ref_type=heads', |
| '58a4275aafa8774bd6b1540adceae4ea434b8db75b476' |
| '11839ff47be88cfcf22') |
| |
| def common_vm_setup(self, kvm_args=None, cpu_args=None): |
| self.set_machine('q35') |
| self.require_accelerator("kvm") |
| |
| self.vm.set_console() |
| if kvm_args: |
| self.vm.add_args("-accel", "kvm,%s" %kvm_args) |
| else: |
| self.vm.add_args("-accel", "kvm") |
| self.vm.add_args("-smp", "2") |
| if cpu_args: |
| self.vm.add_args("-cpu", "host,%s" %cpu_args) |
| else: |
| self.vm.add_args("-cpu", "host") |
| self.vm.add_args("-m", "2G") |
| self.vm.add_args("-nographic", "-nodefaults") |
| |
| |
| self.uki_path = self.ASSET_UKI.fetch() |
| self.ovmf_path = self.ASSET_OVMF.fetch() |
| |
| self.vm.add_args('-kernel', self.uki_path) |
| self.vm.add_args("-bios", self.ovmf_path) |
| # enable KVM VMFD change on reset for a non-coco VM |
| self.vm.add_args("-machine", "q35,x-change-vmfd-on-reset=on") |
| |
| # enable tracing of basic vmfd change function |
| self.vm.add_args("--trace", "kvm_reset_vmfd") |
| |
| def launch_vm(self): |
| try: |
| self.vm.launch() |
| except machine.VMLaunchFailure as e: |
| if "Xen HVM guest support not present" in e.output: |
| self.skipTest("KVM Xen support is not present " |
| "(need v5.12+ kernel with CONFIG_KVM_XEN)") |
| elif "Property 'kvm-accel.xen-version' not found" in e.output: |
| self.skipTest("QEMU not built with CONFIG_XEN_EMU support") |
| else: |
| raise e |
| |
| self.log.info('VM launched') |
| console_pattern = 'bash-5.1#' |
| wait_for_console_pattern(self, console_pattern) |
| self.log.info('VM ready with a bash prompt') |
| |
| def vm_console_reset(self): |
| exec_command_and_wait_for_pattern(self, '/usr/sbin/reboot -f', |
| 'reboot: machine restart') |
| console_pattern = '# --- Hello world ---' |
| wait_for_console_pattern(self, console_pattern) |
| self.vm.shutdown() |
| |
| def vm_qmp_reset(self): |
| self.vm.qmp('system_reset') |
| console_pattern = '# --- Hello world ---' |
| wait_for_console_pattern(self, console_pattern) |
| self.vm.shutdown() |
| |
| def check_logs(self): |
| self.assertRegex(self.vm.get_log(), |
| r'kvm_reset_vmfd') |
| self.assertRegex(self.vm.get_log(), |
| r'virtual machine state has been rebuilt') |
| |
| def test_reset_console(self): |
| self.common_vm_setup() |
| self.launch_vm() |
| self.vm_console_reset() |
| self.check_logs() |
| |
| def test_reset_qmp(self): |
| self.common_vm_setup() |
| self.launch_vm() |
| self.vm_qmp_reset() |
| self.check_logs() |
| |
| def test_reset_kvmpit(self): |
| self.common_vm_setup() |
| self.vm.add_args("--trace", "kvmpit_post_vmfd_change") |
| self.launch_vm() |
| self.vm_console_reset() |
| self.assertRegex(self.vm.get_log(), |
| r'kvmpit_post_vmfd_change') |
| |
| def test_reset_xen_emulation(self): |
| self.common_vm_setup("xen-version=0x4000a,kernel-irqchip=split") |
| self.launch_vm() |
| self.vm_console_reset() |
| self.check_logs() |
| |
| def test_reset_hyperv_vmbus(self): |
| self.common_vm_setup(None, "hv-syndbg,hv-relaxed,hv_time,hv-synic," |
| "hv-vpindex,hv-runtime,hv-stimer") |
| self.vm.add_args("-device", "vmbus-bridge,irq=15") |
| self.vm.add_args("-trace", "vmbus_handle_vmfd_change") |
| self.launch_vm() |
| self.vm_console_reset() |
| self.assertRegex(self.vm.get_log(), |
| r'vmbus_handle_vmfd_change') |
| |
| if __name__ == '__main__': |
| QemuSystemTest.main() |
