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Re: [Qemu-devel] [Qemu-discuss] error - Guest has not initialized the di

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [Qemu-discuss] error - Guest has not initialized the display yet.
Date: Thu, 26 Mar 2015 22:00:31 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0

On 26/03/2015 21:55, Peter Maydell wrote:
> I feel like we're recapitulating history here -- is
> c3c1bb99d undoing the fix that a87f39543a made for when we
> tried this a year ago in 360e607, or is there something
> more subtle going on ?

It's more subtle.  The patch should only make a difference when
address_space_translate_internal modifies *plen.

The crux of the change is the first operand of this MIN:

-        len = MIN(len, (addr | iotlb.addr_mask) - addr + 1);
+        *plen = MIN(*plen, (addr | iotlb.addr_mask) - addr + 1);

changing from len to *plen.


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