{"id":2197713,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2197713/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260218114233.266178-33-anisinha@redhat.com>","date":"2026-02-18T11:42:25","name":"[v5,32/34] tests/functional/x86_64: add functional test to exercise vm fd change on reset","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"a1cc7f0a1474d9def1e9b4b77bb54b00676b8778","submitter":{"id":86030,"url":"http://patchwork.ozlabs.org/api/1.0/people/86030/?format=json","name":"Ani Sinha","email":"anisinha@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260218114233.266178-33-anisinha@redhat.com/mbox/","series":[{"id":492541,"url":"http://patchwork.ozlabs.org/api/1.0/series/492541/?format=json","date":"2026-02-18T11:41:56","name":"Introduce support for confidential guest reset (x86)","version":5,"mbox":"http://patchwork.ozlabs.org/series/492541/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2197713/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=RQ3IsEH7;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google 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Wed, 18 Feb 2026 03:44:25 -0800 (PST)","by 2002:a17:902:ea0a:b0:2a9:63de:b374 with SMTP id\n d9443c01a7336-2ab50521f0dmr150977465ad.3.1771415064954;\n Wed, 18 Feb 2026 03:44:24 -0800 (PST)"],"From":"Ani Sinha ","To":"Paolo Bonzini , Zhao Liu ,\n Ani Sinha ","Cc":"kraxel@redhat.com,\n\tqemu-devel@nongnu.org","Subject":"[PATCH v5 32/34] tests/functional/x86_64: add functional test to\n exercise vm fd change on reset","Date":"Wed, 18 Feb 2026 17:12:25 +0530","Message-ID":"<20260218114233.266178-33-anisinha@redhat.com>","X-Mailer":"git-send-email 2.42.0","In-Reply-To":"<20260218114233.266178-1-anisinha@redhat.com>","References":"<20260218114233.266178-1-anisinha@redhat.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=170.10.133.124;\n envelope-from=anisinha@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.043,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"A new functional test is added that exercises the code changes related to\nclosing of the old KVM VM file descriptor and opening a new one upon VM reset.\nThis normally happens when confidential guests are reset but for\nnon-confidential guests, we use a special machine specific debug/test parameter\n'x-change-vmfd-on-reset' to enable this behavior.\nOnly specific code changes related to re-initialisation of SEV-ES, SEV-SNP and\nTDX platforms are not exercised in this test as they require hardware that\nsupports running confidential guests.\n\nSigned-off-by: Ani Sinha \n---\n MAINTAINERS | 1 +\n tests/functional/x86_64/meson.build | 1 +\n tests/functional/x86_64/test_rebuild_vmfd.py | 136 +++++++++++++++++++\n 3 files changed, 138 insertions(+)\n create mode 100755 tests/functional/x86_64/test_rebuild_vmfd.py","diff":"diff --git a/MAINTAINERS b/MAINTAINERS\nindex b0eb77c08f..de74d568e9 100644\n--- a/MAINTAINERS\n+++ b/MAINTAINERS\n@@ -157,6 +157,7 @@ M: Ani Sinha \n M: Paolo Bonzini \n S: Maintained\n F: stubs/kvm.c\n+F: tests/functional/x86_64/test_rebuild_vmfd.py\n \n Guest CPU cores (TCG)\n ---------------------\ndiff --git a/tests/functional/x86_64/meson.build b/tests/functional/x86_64/meson.build\nindex f78eec5e6c..c6553d922d 100644\n--- a/tests/functional/x86_64/meson.build\n+++ b/tests/functional/x86_64/meson.build\n@@ -36,4 +36,5 @@ tests_x86_64_system_thorough = [\n 'vfio_user_client',\n 'virtio_balloon',\n 'virtio_gpu',\n+ 'rebuild_vmfd',\n ]\ndiff --git a/tests/functional/x86_64/test_rebuild_vmfd.py b/tests/functional/x86_64/test_rebuild_vmfd.py\nnew file mode 100755\nindex 0000000000..5a8e5fd89b\n--- /dev/null\n+++ b/tests/functional/x86_64/test_rebuild_vmfd.py\n@@ -0,0 +1,136 @@\n+#!/usr/bin/env python3\n+#\n+# Functional tests exercising guest KVM file descriptor change on reset.\n+#\n+# Copyright © 2026 Red Hat, Inc.\n+#\n+# Author:\n+# Ani Sinha \n+#\n+# SPDX-License-Identifier: GPL-2.0-or-later\n+\n+import os\n+from qemu.machine import machine\n+\n+from qemu_test import QemuSystemTest, Asset, exec_command_and_wait_for_pattern\n+from qemu_test import wait_for_console_pattern\n+\n+class KVMGuest(QemuSystemTest):\n+\n+ # ASSET UKI was generated using\n+ # https://gitlab.com/kraxel/edk2-tests/-/blob/unittest/tools/make-supermin.sh\n+ ASSET_UKI = Asset('https://gitlab.com/anisinha/misc-artifacts/'\n+ '-/raw/main/uki.x86-64.efi?ref_type=heads',\n+ 'e0f806bd1fa24111312e1fe849d2ee69808d4343930a5'\n+ 'dc8c1688da17c65f576')\n+ # ASSET_OVMF comes from /usr/share/edk2/ovmf/OVMF.stateless.fd of a\n+ # fedora core 43 distribution which in turn comes from the\n+ # edk2-ovmf-20251119-3.fc43.noarch rpm of that distribution.\n+ ASSET_OVMF = Asset('https://gitlab.com/anisinha/misc-artifacts/'\n+ '-/raw/main/OVMF.stateless.fd?ref_type=heads',\n+ '58a4275aafa8774bd6b1540adceae4ea434b8db75b476'\n+ '11839ff47be88cfcf22')\n+\n+ def common_vm_setup(self, kvm_args=None, cpu_args=None):\n+ self.set_machine('q35')\n+ self.require_accelerator(\"kvm\")\n+\n+ self.vm.set_console()\n+ if kvm_args:\n+ self.vm.add_args(\"-accel\", \"kvm,%s\" %kvm_args)\n+ else:\n+ self.vm.add_args(\"-accel\", \"kvm\")\n+ self.vm.add_args(\"-smp\", \"2\")\n+ if cpu_args:\n+ self.vm.add_args(\"-cpu\", \"host,%s\" %cpu_args)\n+ else:\n+ self.vm.add_args(\"-cpu\", \"host\")\n+ self.vm.add_args(\"-m\", \"2G\")\n+ self.vm.add_args(\"-nographic\", \"-nodefaults\")\n+\n+\n+ self.uki_path = self.ASSET_UKI.fetch()\n+ self.ovmf_path = self.ASSET_OVMF.fetch()\n+\n+ self.vm.add_args('-kernel', self.uki_path)\n+ self.vm.add_args(\"-bios\", self.ovmf_path)\n+ # enable KVM VMFD change on reset for a non-coco VM\n+ self.vm.add_args(\"-machine\", \"q35,x-change-vmfd-on-reset=on\")\n+\n+ # enable tracing of basic vmfd change function\n+ self.vm.add_args(\"--trace\", \"kvm_reset_vmfd\")\n+\n+ def launch_vm(self):\n+ try:\n+ self.vm.launch()\n+ except machine.VMLaunchFailure as e:\n+ if \"Xen HVM guest support not present\" in e.output:\n+ self.skipTest(\"KVM Xen support is not present \"\n+ \"(need v5.12+ kernel with CONFIG_KVM_XEN)\")\n+ elif \"Property 'kvm-accel.xen-version' not found\" in e.output:\n+ self.skipTest(\"QEMU not built with CONFIG_XEN_EMU support\")\n+ else:\n+ raise e\n+\n+ self.log.info('VM launched')\n+ console_pattern = 'bash-5.1#'\n+ wait_for_console_pattern(self, console_pattern)\n+ self.log.info('VM ready with a bash prompt')\n+\n+ def vm_console_reset(self):\n+ exec_command_and_wait_for_pattern(self, '/usr/sbin/reboot -f',\n+ 'reboot: machine restart')\n+ console_pattern = '# --- Hello world ---'\n+ wait_for_console_pattern(self, console_pattern)\n+ self.vm.shutdown()\n+\n+ def vm_qmp_reset(self):\n+ self.vm.qmp('system_reset')\n+ console_pattern = '# --- Hello world ---'\n+ wait_for_console_pattern(self, console_pattern)\n+ self.vm.shutdown()\n+\n+ def check_logs(self):\n+ self.assertRegex(self.vm.get_log(),\n+ r'kvm_reset_vmfd')\n+ self.assertRegex(self.vm.get_log(),\n+ r'virtual machine state has been rebuilt')\n+\n+ def test_reset_console(self):\n+ self.common_vm_setup()\n+ self.launch_vm()\n+ self.vm_console_reset()\n+ self.check_logs()\n+\n+ def test_reset_qmp(self):\n+ self.common_vm_setup()\n+ self.launch_vm()\n+ self.vm_qmp_reset()\n+ self.check_logs()\n+\n+ def test_reset_kvmpit(self):\n+ self.common_vm_setup()\n+ self.vm.add_args(\"--trace\", \"kvmpit_post_vmfd_change\")\n+ self.launch_vm()\n+ self.vm_console_reset()\n+ self.assertRegex(self.vm.get_log(),\n+ r'kvmpit_post_vmfd_change')\n+\n+ def test_reset_xen_emulation(self):\n+ self.common_vm_setup(\"xen-version=0x4000a,kernel-irqchip=split\")\n+ self.launch_vm()\n+ self.vm_console_reset()\n+ self.check_logs()\n+\n+ def test_reset_hyperv_vmbus(self):\n+ self.common_vm_setup(None, \"hv-syndbg,hv-relaxed,hv_time,hv-synic,\"\n+ \"hv-vpindex,hv-runtime,hv-stimer\")\n+ self.vm.add_args(\"-device\", \"vmbus-bridge,irq=15\")\n+ self.vm.add_args(\"-trace\", \"vmbus_handle_vmfd_change\")\n+ self.launch_vm()\n+ self.vm_console_reset()\n+ self.assertRegex(self.vm.get_log(),\n+ r'vmbus_handle_vmfd_change')\n+\n+if __name__ == '__main__':\n+ QemuSystemTest.main()\n","prefixes":["v5","32/34"]}