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Re: [Qemu-devel] [PATCH v2] exec.c: Fix subpage memory access to RAM Mem

From: Gleb Natapov
Subject: Re: [Qemu-devel] [PATCH v2] exec.c: Fix subpage memory access to RAM MemoryRegion
Date: Thu, 1 Dec 2011 11:47:10 +0200

On Thu, Dec 01, 2011 at 11:41:52AM +0200, Avi Kivity wrote:
> On 12/01/2011 11:37 AM, Gleb Natapov wrote:
> > > 
> > > Looks reasonable.  Should go into 1.1.  Should we backport it to
> > > 1.0.blah?  From 95c318f's description, it doesn't happen in normal
> > > circumstances.
> > > 
> > To reproduce that I mappped subpage PCI bar over RAM IIRC. 
> In qemu 1.0, you can no longer do that (the pci bridge will not let the
> BAR override the RAM).

Hmm, if this is how real HW work then problem solved :) (different HW can
behave differently, but it is reasonable to assume that on a PC memory
access below TOM will be redirected to memory controller no matter what)
So what is the motivation for Andreas patch than?


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