Re: [Qemu-devel] [PATCH v4 17/17] ipmi: Add a force off function

[Corey Minyard <cminyard@mvista.com>]

On 11/13/2015 07:23 AM, Paolo Bonzini wrote:
>
> On 13/11/2015 14:22, Corey Minyard wrote:
>> On 11/13/2015 03:15 AM, Daniel P. Berrange wrote:
>>> On Thu, Nov 12, 2015 at 01:02:33PM -0600, minyard@acm.org wrote:
>>>> From: Corey Minyard <cminyard@mvista.com>
>>>>
>>>> Allow the IPMI interface to request a forced power off.
>>>>
>>>> Signed-off-by: Corey Minyard <cminyard@mvista.com>
>>>> ---
>>>>  hw/ipmi/ipmi_bmc_extern.c | 5 +++++
>>>>  1 file changed, 5 insertions(+)
>>>>
>>>> diff --git a/hw/ipmi/ipmi_bmc_extern.c b/hw/ipmi/ipmi_bmc_extern.c
>>>> index 05b9121..7ae6294 100644
>>>> --- a/hw/ipmi/ipmi_bmc_extern.c
>>>> +++ b/hw/ipmi/ipmi_bmc_extern.c
>>>> @@ -52,6 +52,7 @@
>>>>  #define   VM_CAPABILITIES_IRQ      0x04
>>>>  #define   VM_CAPABILITIES_NMI      0x08
>>>>  #define   VM_CAPABILITIES_ATTN     0x10
>>>> +#define VM_CMD_FORCEOFF            0x09
>>>>  
>>>>  #define TYPE_IPMI_BMC_EXTERN "ipmi-bmc-extern"
>>>>  #define IPMI_BMC_EXTERN(obj) OBJECT_CHECK(IPMIBmcExtern, (obj), \
>>>> @@ -268,6 +269,10 @@ static void handle_hw_op(IPMIBmcExtern *ibe, unsigned char hw_op)
>>>>      case VM_CMD_SEND_NMI:
>>>>          k->do_hw_op(s, IPMI_SEND_NMI, 0);
>>>>          break;
>>>> +
>>>> +    case VM_CMD_FORCEOFF:
>>>> +        exit(0);
>>>> +        break;
>>> You should really be calling qemu_system_shutdown_request() rather than
>>> exit() so that you run normal QEMU shutdown logic.
>> qemu_system_shutdown_request() would generally have already been called using
>> VM_CMD_POWEROFF.  If I understand correctly, qemu_system_shutdown_request() does
>> a graceful shutdown and may not complete if the OS has failed.
> No, that's qemu_system_powerdown_request.
>
> Paolo

Ah, ok, got it.

Thanks Daniel and Paulo,

-corey

>
>> The CMD_FORCEOFF is a "power off and don't ask me any questions" operation.  It's
>> used as a last resort if VM_CMD_POWEROFF fails.
>>
>> -corey
>>
>>