Re: [Qemu-devel] [PING] [PATCH v2 1/1] -machine vmport=off: Allow disabling of VMWare ioport emulation

[Paolo Bonzini <pbonzini@redhat.com>]

Il 15/10/2014 23:20, Slutz, Donald Christopher ha scritto:
> Do I need to repost with the 2 Reviewed-by ?

No, I'll attend to this as soon as I get back home.

Paolo

> On 10/06/14 05:26, Richard W.M. Jones wrote:
>> On Fri, Oct 03, 2014 at 05:33:37PM -0400, Don Slutz wrote:
>>> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
>>>
>>> This is a pc & q35 only machine opt.
>>>
>>> VMWare apparently doesn't like running under QEMU due to our
>>> incomplete emulation of it's special IO Port.  This adds a
>>> pc & q35 property to allow it to be turned off.
>>>
>>> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
>>> Signed-off-by: Don Slutz <dslutz@verizon.com>
>>> ---
>>>   hw/i386/pc.c         | 19 +++++++++++++++++++
>>>   hw/i386/pc_piix.c    |  4 ++--
>>>   hw/i386/pc_q35.c     |  3 ++-
>>>   include/hw/i386/pc.h |  2 ++
>>>   qemu-options.hx      |  3 +++
>>>   vl.c                 |  4 ++++
>>>   6 files changed, 32 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
>>> index 82a7daa..8e37a99 100644
>>> --- a/hw/i386/pc.c
>>> +++ b/hw/i386/pc.c
>>> @@ -1687,6 +1687,20 @@ static void pc_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
>>>       pcms->max_ram_below_4g = value;
>>>   }
>>>   
>>> +static bool pc_machine_get_vmport(Object *obj, Error **errp)
>>> +{
>>> +    PCMachineState *pcms = PC_MACHINE(obj);
>>> +
>>> +    return pcms->vmport;
>>> +}
>>> +
>>> +static void pc_machine_set_vmport(Object *obj, bool value, Error **errp)
>>> +{
>>> +    PCMachineState *pcms = PC_MACHINE(obj);
>>> +
>>> +    pcms->vmport = value;
>>> +}
>>> +
>>>   static void pc_machine_initfn(Object *obj)
>>>   {
>>>       PCMachineState *pcms = PC_MACHINE(obj);
>>> @@ -1699,6 +1713,11 @@ static void pc_machine_initfn(Object *obj)
>>>                           pc_machine_get_max_ram_below_4g,
>>>                           pc_machine_set_max_ram_below_4g,
>>>                           NULL, NULL, NULL);
>>> +    pcms->vmport = !xen_enabled();
>>> +    object_property_add_bool(obj, PC_MACHINE_VMPORT,
>>> +                             pc_machine_get_vmport,
>>> +                             pc_machine_set_vmport,
>>> +                             NULL);
>>>   }
>>>   
>>>   static void pc_machine_class_init(ObjectClass *oc, void *data)
>>> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
>>> index 103d756..03a73ce 100644
>>> --- a/hw/i386/pc_piix.c
>>> +++ b/hw/i386/pc_piix.c
>>> @@ -234,8 +234,8 @@ static void pc_init1(MachineState *machine,
>>>       pc_vga_init(isa_bus, pci_enabled ? pci_bus : NULL);
>>>   
>>>       /* init basic PC hardware */
>>> -    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, xen_enabled(),
>>> -        0x4);
>>> +    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy,
>>> +                         !pc_machine->vmport, 0x4);
>>>   
>>>       pc_nic_init(isa_bus, pci_bus);
>>>   
>>> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
>>> index d4a907c..c5ba93d 100644
>>> --- a/hw/i386/pc_q35.c
>>> +++ b/hw/i386/pc_q35.c
>>> @@ -241,7 +241,8 @@ static void pc_q35_init(MachineState *machine)
>>>       pc_register_ferr_irq(gsi[13]);
>>>   
>>>       /* init basic PC hardware */
>>> -    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, false, 0xff0104);
>>> +    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy,
>>> +                         !pc_machine->vmport, 0xff0104);
>>>   
>>>       /* connect pm stuff to lpc */
>>>       ich9_lpc_pm_init(lpc);
>>> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
>>> index 77316d5..96febb9 100644
>>> --- a/include/hw/i386/pc.h
>>> +++ b/include/hw/i386/pc.h
>>> @@ -35,11 +35,13 @@ struct PCMachineState {
>>>       HotplugHandler *acpi_dev;
>>>   
>>>       uint64_t max_ram_below_4g;
>>> +    bool vmport;
>>>   };
>>>   
>>>   #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
>>>   #define PC_MACHINE_MEMHP_REGION_SIZE "hotplug-memory-region-size"
>>>   #define PC_MACHINE_MAX_RAM_BELOW_4G "max-ram-below-4g"
>>> +#define PC_MACHINE_VMPORT           "vmport"
>>>   
>>>   /**
>>>    * PCMachineClass:
>>> diff --git a/qemu-options.hx b/qemu-options.hx
>>> index 365b56c..fe6b6e5 100644
>>> --- a/qemu-options.hx
>>> +++ b/qemu-options.hx
>>> @@ -33,6 +33,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
>>>       "                property accel=accel1[:accel2[:...]] selects accelerator\n"
>>>       "                supported accelerators are kvm, xen, tcg (default: tcg)\n"
>>>       "                kernel_irqchip=on|off controls accelerated irqchip support\n"
>>> +    "                vmport=on|off controls emulation of vmport (default: on)\n"
>>>       "                kvm_shadow_mem=size of KVM shadow MMU\n"
>>>       "                dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
>>>       "                mem-merge=on|off controls memory merge support (default: on)\n"
>>> @@ -51,6 +52,8 @@ than one accelerator specified, the next one is used if the previous one fails
>>>   to initialize.
>>>   @item kernel_irqchip=on|off
>>>   Enables in-kernel irqchip support for the chosen accelerator when available.
>>> +@item vmport=on|off
>>> +Enables emulation of VMWare IO port, for vmmouse etc. (enabled by default)
>>>   @item kvm_shadow_mem=size
>>>   Defines the size of the KVM shadow MMU.
>>>   @item dump-guest-core=on|off
>>> diff --git a/vl.c b/vl.c
>>> index 9d2aaaf..26fa864 100644
>>> --- a/vl.c
>>> +++ b/vl.c
>>> @@ -389,6 +389,10 @@ static QemuOptsList qemu_machine_opts = {
>>>               .name = PC_MACHINE_MAX_RAM_BELOW_4G,
>>>               .type = QEMU_OPT_SIZE,
>>>               .help = "maximum ram below the 4G boundary (32bit boundary)",
>>> +        }, {
>>> +            .name = PC_MACHINE_VMPORT,
>>> +            .type = QEMU_OPT_BOOL,
>>> +            .help = "Enable vmport (pc & q35)",
>>>           },{
>>>               .name = "iommu",
>>>               .type = QEMU_OPT_BOOL,
>>> -- 
>>> 1.8.4
>> I reviewed the code and compiled-tested it, but didn't run it since
>> I've moved my ESXi server to baremetal *.  You can add:
>>
>>    Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
>>
>> Rich.
>>
>> * For other reasons: QEMU emulates vmxnet3, but it's quite unreliable
>> when used with an ESXi hypervisor guest.  I saw frequent random
>> network disconnections.
>>