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"""
Check compatibility of virtio device types
"""
# Copyright (c) 2018 Red Hat, Inc.
#
# Author:
# Eduardo Habkost <ehabkost@redhat.com>
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
import sys
import os
from qemu.machine import QEMUMachine
from avocado_qemu import QemuSystemTest
# Virtio Device IDs:
VIRTIO_NET = 1
VIRTIO_BLOCK = 2
VIRTIO_CONSOLE = 3
VIRTIO_RNG = 4
VIRTIO_BALLOON = 5
VIRTIO_RPMSG = 7
VIRTIO_SCSI = 8
VIRTIO_9P = 9
VIRTIO_RPROC_SERIAL = 11
VIRTIO_CAIF = 12
VIRTIO_GPU = 16
VIRTIO_INPUT = 18
VIRTIO_VSOCK = 19
VIRTIO_CRYPTO = 20
PCI_VENDOR_ID_REDHAT_QUMRANET = 0x1af4
# Device IDs for legacy/transitional devices:
PCI_LEGACY_DEVICE_IDS = {
VIRTIO_NET: 0x1000,
VIRTIO_BLOCK: 0x1001,
VIRTIO_BALLOON: 0x1002,
VIRTIO_CONSOLE: 0x1003,
VIRTIO_SCSI: 0x1004,
VIRTIO_RNG: 0x1005,
VIRTIO_9P: 0x1009,
VIRTIO_VSOCK: 0x1012,
}
def pci_modern_device_id(virtio_devid):
return virtio_devid + 0x1040
def devtype_implements(vm, devtype, implements):
return devtype in [d['name'] for d in
vm.cmd('qom-list-types', implements=implements)]
def get_pci_interfaces(vm, devtype):
interfaces = ('pci-express-device', 'conventional-pci-device')
return [i for i in interfaces if devtype_implements(vm, devtype, i)]
class VirtioVersionCheck(QemuSystemTest):
"""
Check if virtio-version-specific device types result in the
same device tree created by `disable-modern` and
`disable-legacy`.
:avocado: tags=arch:x86_64
"""
# just in case there are failures, show larger diff:
maxDiff = 4096
def run_device(self, devtype, opts=None, machine='pc'):
"""
Run QEMU with `-device DEVTYPE`, return device info from `query-pci`
"""
with QEMUMachine(self.qemu_bin) as vm:
vm.set_machine(machine)
if opts:
devtype += ',' + opts
vm.add_args('-device', '%s,id=devfortest' % (devtype))
vm.add_args('-S')
vm.launch()
pcibuses = vm.cmd('query-pci')
alldevs = [dev for bus in pcibuses for dev in bus['devices']]
devfortest = [dev for dev in alldevs
if dev['qdev_id'] == 'devfortest']
return devfortest[0], get_pci_interfaces(vm, devtype)
def assert_devids(self, dev, devid, non_transitional=False):
self.assertEqual(dev['id']['vendor'], PCI_VENDOR_ID_REDHAT_QUMRANET)
self.assertEqual(dev['id']['device'], devid)
if non_transitional:
self.assertTrue(0x1040 <= dev['id']['device'] <= 0x107f)
self.assertGreaterEqual(dev['id']['subsystem'], 0x40)
def check_all_variants(self, qemu_devtype, virtio_devid):
"""Check if a virtio device type and its variants behave as expected"""
# Force modern mode:
dev_modern, _ = self.run_device(qemu_devtype,
'disable-modern=off,disable-legacy=on')
self.assert_devids(dev_modern, pci_modern_device_id(virtio_devid),
non_transitional=True)
# <prefix>-non-transitional device types should be 100% equivalent to
# <prefix>,disable-modern=off,disable-legacy=on
dev_1_0, nt_ifaces = self.run_device('%s-non-transitional' % (qemu_devtype))
self.assertEqual(dev_modern, dev_1_0)
# Force transitional mode:
dev_trans, _ = self.run_device(qemu_devtype,
'disable-modern=off,disable-legacy=off')
self.assert_devids(dev_trans, PCI_LEGACY_DEVICE_IDS[virtio_devid])
# Force legacy mode:
dev_legacy, _ = self.run_device(qemu_devtype,
'disable-modern=on,disable-legacy=off')
self.assert_devids(dev_legacy, PCI_LEGACY_DEVICE_IDS[virtio_devid])
# No options: default to transitional on PC machine-type:
no_opts_pc, generic_ifaces = self.run_device(qemu_devtype)
self.assertEqual(dev_trans, no_opts_pc)
#TODO: check if plugging on a PCI Express bus will make the
# device non-transitional
#no_opts_q35 = self.run_device(qemu_devtype, machine='q35')
#self.assertEqual(dev_modern, no_opts_q35)
# <prefix>-transitional device types should be 100% equivalent to
# <prefix>,disable-modern=off,disable-legacy=off
dev_trans, trans_ifaces = self.run_device('%s-transitional' % (qemu_devtype))
self.assertEqual(dev_trans, dev_trans)
# ensure the interface information is correct:
self.assertIn('conventional-pci-device', generic_ifaces)
self.assertIn('pci-express-device', generic_ifaces)
self.assertIn('conventional-pci-device', nt_ifaces)
self.assertIn('pci-express-device', nt_ifaces)
self.assertIn('conventional-pci-device', trans_ifaces)
self.assertNotIn('pci-express-device', trans_ifaces)
def test_conventional_devs(self):
self.check_all_variants('virtio-net-pci', VIRTIO_NET)
# virtio-blk requires 'driver' parameter
#self.check_all_variants('virtio-blk-pci', VIRTIO_BLOCK)
self.check_all_variants('virtio-serial-pci', VIRTIO_CONSOLE)
self.check_all_variants('virtio-rng-pci', VIRTIO_RNG)
self.check_all_variants('virtio-balloon-pci', VIRTIO_BALLOON)
self.check_all_variants('virtio-scsi-pci', VIRTIO_SCSI)
# virtio-9p requires 'fsdev' parameter
#self.check_all_variants('virtio-9p-pci', VIRTIO_9P)
def check_modern_only(self, qemu_devtype, virtio_devid):
"""Check if a modern-only virtio device type behaves as expected"""
# Force modern mode:
dev_modern, _ = self.run_device(qemu_devtype,
'disable-modern=off,disable-legacy=on')
self.assert_devids(dev_modern, pci_modern_device_id(virtio_devid),
non_transitional=True)
# No options: should be modern anyway
dev_no_opts, ifaces = self.run_device(qemu_devtype)
self.assertEqual(dev_modern, dev_no_opts)
self.assertIn('conventional-pci-device', ifaces)
self.assertIn('pci-express-device', ifaces)
def test_modern_only_devs(self):
self.check_modern_only('virtio-vga', VIRTIO_GPU)
self.check_modern_only('virtio-gpu-pci', VIRTIO_GPU)
self.check_modern_only('virtio-mouse-pci', VIRTIO_INPUT)
self.check_modern_only('virtio-tablet-pci', VIRTIO_INPUT)
self.check_modern_only('virtio-keyboard-pci', VIRTIO_INPUT)
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