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Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulati
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4] |
Date: |
Fri, 15 May 2009 10:50:59 +0100 |
User-agent: |
KMail/1.11.2 (Linux/2.6.29-2-amd64; KDE/4.2.2; x86_64; ; ) |
> > I'm pretty sure it's still broken for large offsets.
> >
> Is big offsets the intention of this patch? As far as I understood its
> for small offsets (typical 64k - on debian, ubuntu, suse, fedora and all
> the others - i checked it because it tested this), so address 0 will not
> be used in typical linux configs today to grab null pointer exceptions.
The intent of the patch is to move the guest virtual address space to a void
conflicts with the host VM. For a 32-bit guest n a 64-bit host it makes a lot
of sense to pick a completely unused 4G region (and probably even reserve it
so the host doesn't start using it), which is almost certainly going to be at
a high address.
Paul
- [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v3], Riku Voipio, 2009/05/05
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v3], Paul Brook, 2009/05/05
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v3], Riku Voipio, 2009/05/05
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v3], Paul Brook, 2009/05/05
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v3], malc, 2009/05/05
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Riku Voipio, 2009/05/05
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Paul Brook, 2009/05/14
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Martin Mohring, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4],
Paul Brook <=
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Riku Voipio, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Paul Brook, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Paul Brook, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], malc, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Martin Mohring, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Riku Voipio, 2009/05/15
- Re: [Qemu-devel] [PATCH] Revived GUEST_BASE support for usermode emulation targets [v4], Martin Mohring, 2009/05/15