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Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM |
Date: |
Thu, 10 Oct 2013 14:42:07 +0200 |
Hi,
> > > I think the issue is with legacy guests.
> > > E.g. if VCPU claims to support 50 bit of memory
> > > do we put high PCI memory at 1 << 50?
> > > If yes old guests which expect at most 40 bit
> > > will not be able to use it.
> >
> > Hmm. Sure such guests exist?
>
> I wouldn't be surprised. At least some windows
> guests crash if you try to tell them your system
> has too much physical memory (e.g. 2^48).
Ok, so there is not really a way around making the location
configurable. The size isn't needed, qemu can handle this on it's own.
Guess we can just go with Igor's approach then. "etc/mem64-end" is a
pretty bad name to say "please map 64bit pci bars here" though.
cheers,
Gerd
- [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Igor Mammedov, 2013/10/09
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Gerd Hoffmann, 2013/10/09
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Igor Mammedov, 2013/10/09
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Gerd Hoffmann, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Michael S. Tsirkin, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Gerd Hoffmann, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Michael S. Tsirkin, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM,
Gerd Hoffmann <=
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Igor Mammedov, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Gerd Hoffmann, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Igor Mammedov, 2013/10/10
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Gerd Hoffmann, 2013/10/11
- Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Igor Mammedov, 2013/10/10
Re: [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM, Michael S. Tsirkin, 2013/10/10