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Re: [Qemu-devel] [Qemu-ppc] [PATCH] target-ppc: Change default machine f

From: Scott Wood
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH] target-ppc: Change default machine for 64-bit
Date: Thu, 13 Jun 2013 13:44:21 -0500

On 06/13/2013 01:31:48 PM, Anthony Liguori wrote:
Alexander Graf <address@hidden> writes:

> On 17.05.2013, at 09:42, Andreas Färber wrote:
>> Am 17.05.2013 06:25, schrieb David Gibson:
>>> Currently, for qemu-system-ppc64, the default machine type is 'mac99'. >>> Since the mac99 machine is not being actively maintained, and shows quite
>>> a few signs of bitrot,
>> Please be more specific than making such general claims in a commit
>> message! As the default machine it certainly compiles, so where are you
>> seeing bitrot? The DEC bridge cleanup that I once started kind of
>> depends on the PCI cleanup you recently looked into.
> The mac99 machine for 64bit is actually worse than anything bitrot
> could give you. It emulates a machine that in its form never possibly
> could have existed in real hardware, which makes it very fragile and
> dependent on the guest's mercy to handle this gracefully.

I'll note that we have a CONFIG_PSERIES today. I'd suggest getting rid
of it first before making pseries the default.

Why? As long as it's present in the default ppc64 build, you'll have a default machine. If a user makes a custom config without it, presumably they know they want to run some other machine, so why do you need a default?

QEMU has too much mandatory stuff as is.


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