• [虚拟化/云][全栈demo] 为qemu增加一个PCI的watchdog外设(四)


    通过前面的操作,我们已经可以创建一个带有我们自己的PCI的watchdog外设qemu 虚拟机了。

    目的:

    1. 了解我们的外设情况。

    2. 为在guest中开发我们自己的linux PCI驱动程序做准备。

     

    查看我们的watchdog设备

    考虑到ubuntu对于 spice的支持不好。我们采用VNC显示。

     -vnc 127.0.0.1:21 -vga cirrus -chardev stdio,id=mon0 -mon chardev=mon0,mode=readline

    启动qemu

    $ sudo x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -device cstl-watchdog -device virtio-blk-pci,scsi=off,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/home/shhfeng/iso/image/ubuntu.12.04.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none  -net bridge,br=virbr2,helper=/home/shhfeng/qemu/debug/qemu-bridge-helper -net nic,model=virtio  -vnc 127.0.0.1:21 -vga cirrus -chardev stdio,id=mon0 -mon chardev=mon0,mode=readline

    在qemu的monitor中查看watchdog的信息:

     (qemu) info qtree

      1 (qemu) info qtree
      2 bus: main-system-bus
      3   type System
      4   dev: hpet, id ""
      5     gpio-in 2
      6     gpio-out 1
      7     timers = 3 (0x3)
      8     msi = false
      9     hpet-intcap = 4 (0x4)
     10     irq 32
     11     mmio 00000000fed00000/0000000000000400
     12   dev: kvm-ioapic, id ""
     13     gpio-in 24
     14     gsi_base = 0 (0)
     15     irq 0
     16     mmio 00000000fec00000/0000000000001000
     17   dev: i440FX-pcihost, id ""
     18     pci-hole64-size = 18446744073709551615 (16 EiB)
     19     short_root_bus = 0 (0)
     20     irq 0
     21     bus: pci.0
     22       type PCI
     23       dev: cstl-watchdog, id ""
     24         expiration-ticks = 10 (0xa)
     25         addr = 05.0
     26         romfile = ""
     27         rombar = 1 (0x1)
     28         multifunction = false
     29         command_serr_enable = true
     30         class Class 0880, addr 00:05.0, pci id 1af4:0101 (sub 1af4:1100)
     31         bar 0: i/o at 0xc070 [0xc07f]
     32       dev: virtio-blk-pci, id "virtio-disk0"
     33         class = 0 (0)
     34         ioeventfd = true
     35         vectors = 2 (0x2)
     36         indirect_desc = true
     37         event_idx = true
     38         drive = "drive-virtio-disk0"
     39         logical_block_size = 512 (0x200)
     40         physical_block_size = 512 (0x200)
     41         min_io_size = 0 (0)
     42         opt_io_size = 0 (0)
     43         bootindex = 2 (0x2)
     44         discard_granularity = 4294967295 (0xffffffff)
     45         cyls = 0 (0)
     46         heads = 0 (0)
     47         secs = 0 (0)
     48         serial = ""
     49         config-wce = true
     50         scsi = false
     51         x-iothread = ""
     52         addr = 04.0
     53         romfile = ""
     54         rombar = 1 (0x1)
     55         multifunction = false
     56         command_serr_enable = true
     57         class SCSI controller, addr 00:04.0, pci id 1af4:1001 (sub 1af4:0002)
     58         bar 0: i/o at 0xc000 [0xc03f]
     59         bar 1: mem at 0xfebd2000 [0xfebd2fff]
     60         bus: virtio-bus
     61           type virtio-pci-bus
     62           dev: virtio-blk-device, id ""
     63             drive = "drive-virtio-disk0"
     64             logical_block_size = 512 (0x200)
     65             physical_block_size = 512 (0x200)
     66             min_io_size = 0 (0)
     67             opt_io_size = 0 (0)
     68             bootindex = 2 (0x2)
     69             discard_granularity = 4294967295 (0xffffffff)
     70             cyls = 16383 (0x3fff)
     71             heads = 16 (0x10)
     72             secs = 63 (0x3f)
     73             serial = ""
     74             config-wce = true
     75             scsi = false
     76             x-iothread = ""
     77       dev: PIIX4_PM, id ""
     78         smb_io_base = 45312 (0xb100)
     79         disable_s3 = 0 (0)
     80         disable_s4 = 0 (0)
     81         s4_val = 2 (0x2)
     82         acpi-pci-hotplug-with-bridge-support = true
     83         addr = 01.3
     84         romfile = ""
     85         rombar = 1 (0x1)
     86         multifunction = false
     87         command_serr_enable = true
     88         class Bridge, addr 00:01.3, pci id 8086:7113 (sub 1af4:1100)
     89         bus: i2c
     90           type i2c-bus
     91           dev: smbus-eeprom, id ""
     92             address = 87 (0x57)
     93           dev: smbus-eeprom, id ""
     94             address = 86 (0x56)
     95           dev: smbus-eeprom, id ""
     96             address = 85 (0x55)
     97           dev: smbus-eeprom, id ""
     98             address = 84 (0x54)
     99           dev: smbus-eeprom, id ""
    100             address = 83 (0x53)
    101           dev: smbus-eeprom, id ""
    102             address = 82 (0x52)
    103           dev: smbus-eeprom, id ""
    104             address = 81 (0x51)
    105           dev: smbus-eeprom, id ""
    106             address = 80 (0x50)
    107       dev: piix3-ide, id ""
    108         addr = 01.1
    109         romfile = ""
    110         rombar = 1 (0x1)
    111         multifunction = false
    112         command_serr_enable = true
    113         class IDE controller, addr 00:01.1, pci id 8086:7010 (sub 1af4:1100)
    114         bar 4: i/o at 0xc060 [0xc06f]
    115         bus: ide.1
    116           type IDE
    117           dev: ide-cd, id "ide0-1-0"
    118             drive = "drive-ide0-1-0"
    119             logical_block_size = 512 (0x200)
    120             physical_block_size = 512 (0x200)
    121             min_io_size = 0 (0)
    122             opt_io_size = 0 (0)
    123             bootindex = 1 (0x1)
    124             discard_granularity = 512 (0x200)
    125             ver = "1.7.90"
    126             wwn = 0 (0)
    127             serial = "QM00003"
    128             model = ""
    129             unit = 0 (0)
    130         bus: ide.0
    131           type IDE
    132       dev: virtio-net-pci, id ""
    133         ioeventfd = false
    134         vectors = 3 (0x3)
    135         indirect_desc = true
    136         event_idx = true
    137         any_layout = true
    138         csum = false
    139         guest_csum = false
    140         gso = true
    141         guest_tso4 = false
    142         guest_tso6 = false
    143         guest_ecn = false
    144         guest_ufo = false
    145         host_tso4 = false
    146         host_tso6 = false
    147         host_ecn = false
    148         host_ufo = false
    149         mrg_rxbuf = true
    150         status = true
    151         ctrl_vq = true
    152         ctrl_rx = true
    153         ctrl_vlan = true
    154         ctrl_rx_extra = true
    155         ctrl_mac_addr = true
    156         ctrl_guest_offloads = true
    157         mq = false
    158         mac = "52:54:00:12:34:56"
    159         vlan = 0
    160         netdev = "hub0port1"
    161         bootindex = -1 (0xffffffffffffffff)
    162         x-txtimer = 150000 (0x249f0)
    163         x-txburst = 256 (0x100)
    164         tx = ""
    165         addr = 03.0
    166         romfile = "efi-virtio.rom"
    167         rombar = 1 (0x1)
    168         multifunction = false
    169         command_serr_enable = true
    170         class Ethernet controller, addr 00:03.0, pci id 1af4:1000 (sub 1af4:0001)
    171         bar 0: i/o at 0xc040 [0xc05f]
    172         bar 1: mem at 0xfebd1000 [0xfebd1fff]
    173         bar 6: mem at 0xffffffffffffffff [0x3fffe]
    174         bus: virtio-bus
    175           type virtio-pci-bus
    176           dev: virtio-net-device, id ""
    177             mac = "52:54:00:12:34:56"
    178             vlan = 0
    179             netdev = "hub0port1"
    180             bootindex = -1 (0xffffffffffffffff)
    181             x-txtimer = 150000 (0x249f0)
    182             x-txburst = 256 (0x100)
    183             tx = ""
    184       dev: cirrus-vga, id ""
    185         vgamem_mb = 8 (0x8)
    186         addr = 02.0
    187         romfile = "vgabios-cirrus.bin"
    188         rombar = 1 (0x1)
    189         multifunction = false
    190         command_serr_enable = true
    191         class VGA controller, addr 00:02.0, pci id 1013:00b8 (sub 1af4:1100)
    192         bar 0: mem at 0xfc000000 [0xfdffffff]
    193         bar 1: mem at 0xfebd0000 [0xfebd0fff]
    194         bar 6: mem at 0xffffffffffffffff [0xfffe]
    195       dev: PIIX3, id ""
    196         addr = 01.0
    197         romfile = ""
    198         rombar = 1 (0x1)
    199         multifunction = true
    200         command_serr_enable = true
    201         class ISA bridge, addr 00:01.0, pci id 8086:7000 (sub 1af4:1100)
    202         bus: isa.0
    203           type ISA
    204           dev: isa-fdc, id ""
    205             iobase = 1008 (0x3f0)
    206             irq = 6 (0x6)
    207             dma = 2 (0x2)
    208             driveA = "floppy0"
    209             driveB = ""
    210             bootindexA = -1 (0xffffffffffffffff)
    211             bootindexB = -1 (0xffffffffffffffff)
    212             check_media_rate = true
    213             isa irq 6
    214           dev: port92, id ""
    215           dev: vmmouse, id ""
    216           dev: vmport, id ""
    217           dev: i8042, id ""
    218             isa irqs 1,12
    219           dev: isa-parallel, id ""
    220             index = 0 (0)
    221             iobase = 888 (0x378)
    222             irq = 7 (0x7)
    223             chardev = "parallel0"
    224             isa irq 7
    225           dev: isa-serial, id ""
    226             index = 0 (0)
    227             iobase = 1016 (0x3f8)
    228             irq = 4 (0x4)
    229             chardev = "serial0"
    230             wakeup = 0 (0)
    231             isa irq 4
    232           dev: isa-pcspk, id ""
    233             iobase = 97 (0x61)
    234           dev: kvm-pit, id ""
    235             gpio-in 1
    236             iobase = 64 (0x40)
    237             lost_tick_policy = "delay"
    238           dev: mc146818rtc, id ""
    239             base_year = 0 (0)
    240             lost_tick_policy = "discard"
    241           dev: kvm-i8259, id ""
    242             iobase = 160 (0xa0)
    243             elcr_addr = 1233 (0x4d1)
    244             elcr_mask = 222 (0xde)
    245             master = false
    246           dev: kvm-i8259, id ""
    247             iobase = 32 (0x20)
    248             elcr_addr = 1232 (0x4d0)
    249             elcr_mask = 248 (0xf8)
    250             master = true
    251       dev: i440FX, id ""
    252         addr = 00.0
    253         romfile = ""
    254         rombar = 1 (0x1)
    255         multifunction = false
    256         command_serr_enable = true
    257         class Host bridge, addr 00:00.0, pci id 8086:1237 (sub 1af4:1100)
    258   dev: fw_cfg, id ""
    259     ctl_iobase = 1296 (0x510)
    260     data_iobase = 1297 (0x511)
    261     irq 0
    262     mmio ffffffffffffffff/0000000000000002
    263     mmio ffffffffffffffff/0000000000000001
    264   dev: kvmclock, id ""
    265     irq 0
    266   dev: kvmvapic, id ""
    267     irq 0
    268   dev: icc-bridge, id ""
    269     irq 0
    270     mmio 00000000fee00000/0000000000100000
    271     bus: icc
    272       type icc-bus
    273       dev: kvm-apic, id ""
    274         id = 0 (0)
    275         vapic = true
    276       dev: qemu64-x86_64-cpu, id ""
    277         pmu = false
    278         hv-spinlocks = -1 (0xffffffffffffffff)
    279         hv-relaxed = false
    280         hv-vapic = false
    281         hv-time = false
    282         check = false
    283         enforce = false
    View Code

    可以找到我们的watchdog设备:

          dev: cstl-watchdog, id ""
            expiration-ticks = 10 (0xa)
            addr = 05.0
            romfile = ""
            rombar = 1 (0x1)
            multifunction = false
            command_serr_enable = true
            class Class 0880, addr 00:05.0, pci id 1af4:0101 (sub 1af4:1100)
            bar 0: i/o at 0xc090 [0xc09f]
    有些激动。

    在guest中查看watchdog的信息。

    $ lspci
    00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
    00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
    00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
    00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
    00:02.0 VGA compatible controller: Cirrus Logic GD 5446
    00:03.0 Ethernet controller: Red Hat, Inc Virtio network device
    00:04.0 Ethernet controller: Red Hat, Inc Virtio network device
    00:05.0 System peripheral: Red Hat, Inc Device 0101 (rev 01)
    00:06.0 SCSI storage controller: Red Hat, Inc Virtio block device

    可以看到我们的device设备, Red Hat, Inc Device 0101 (rev 01),这个我们的代码中定义的是一致的。

    static void cwd_class_init(ObjectClass *klass, void *data)
    {
        DeviceClass *dc = DEVICE_CLASS(klass);
        PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

        k->init = cwd_realize;
        k->exit = cwd_unrealize;
        k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
        k->device_id = 0x0101;
        k->revision = 0x01;
        k->class_id = PCI_CLASS_SYSTEM_OTHER;
        dc->reset = cwd_reset;
        dc->vmsd = &vmstate_cwd;
        dc->props = cwd_properties;
    }

    在guest中,查看watchdog的配置寄存器

    $ lspci -x
    00:05.0 System peripheral: Red Hat, Inc Device 0101 (rev 01)
    00: f4 1a 01 01 03 01 00 00 01 00 80 08 00 00 00 00
    10: 91 c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    20: 00 00 00 00 00 00 00 00 00 00 00 00 f4 1a 00 11
    30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

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  • 原文地址:https://www.cnblogs.com/shaohef/p/3803817.html
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