[OpenBIOS] Qemu, OpenBIOS, and HostID

[Artyom Tarasenko]

Hi Oliver,

On Fri, Dec 27, 2013 at 10:56 PM, Olivier Danet <odanet at caramail.com> wrote:
> On 27/12/2013 20:42, Tarl Neustaedter wrote:
>>
>> On 2013-Dec-27, 14:10 , Nick Couchman wrote:
>>>
>>> First, thanks to everyone who has worked to get OpenBIOS up to its
>>> current functional level over the past couple of years.  I'm using Solaris 9
>>> on OpenBIOS with pretty good success these days, which is awesome.
>>>
>>> I do have a question about Qemu, OpenBIOS, and the Solaris hostid.  It
>>> seems that, currently, when booting Solaris with Qemu, the host ID is set to
>>> "80000000."  As far as I can tell, this isn't near correct - according to
>>> all of the documentation I've read, the host ID should be calculated based
>>> on the machine type, and some portion of the MAC address.  This may be the
>>> wrong forum in which to ask this, but I'm wondering if someone could shed
>>> light on why it shows up that way, and if there's a way in OpenBIOS via the
>>> PROM/NVRAM data to set the host ID to something a little bit closer to
>>> normal?
>>
>>
>> The HOSTID used to have embedded knowledge about the system type and other
>> details. As of (I recall) Sun4u, the hostid is 0x8000.0000 plus a serial
>> number. Openbios should pick a number other than "0" for the serial number
>> :-)
>>
>>
> [On 32bits SparcStations]
> The Host ID is made of the machine type and the serial number.
> the serial number is identical to three bytes of the Ethernet MAC address,
> shown as decimal during boot.
> All that stuff is written into the NVRAM
>
> For example, on a SparcStation 20 :
>   MAC Address   = 08:00:20:74:FB:DA
>   Host ID       = 7274FBDA (72 is the machine type of the SS20)
>   Serial number = #7666650 = 0x74FBDA
>
> (And the barcode on the NVRAM chip is also "74FBDA" )
>
> On a SparcStation5, the machine type is 0x80, everything else is identical.
>
> Maybe this small patch for QEMU could help :
> ------------------------------------------------------------------------
> diff --git a/include/hw/nvram/openbios_firmware_abi.h
> b/include/hw/nvram/openbios_firmware_abi.h
> index 5e6e5d4..492c8d5 100644
> --- a/include/hw/nvram/openbios_firmware_abi.h
> +++ b/include/hw/nvram/openbios_firmware_abi.h
> @@ -62,6 +62,8 @@ Sun_init_header(struct Sun_nvram *header, const uint8_t
> *macaddr, int machine_id
>      header->type = 1;
>      header->machine_id = machine_id & 0xff;
>      memcpy(&header->macaddr, macaddr, 6);
> +    memcpy(&header->hostid , &macaddr[3],3);
> +
>      /* Calculate checksum */
>      tmp = 0;
>      tmpptr = (uint8_t *)header;
> ------------------------------------------------------------------------

Can you please submit this patch (+ SoB) to the qemu-devel mailing list?
It's short and beautiful.

Artyom

-- 
Regards,
Artyom Tarasenko

linux/sparc and solaris/sparc under qemu blog:
http://tyom.blogspot.com/search/label/qemu