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Re: [Qemu-devel] [PATCH 15/35] tcg-s390: Query instruction extensions th


From: Alexander Graf
Subject: Re: [Qemu-devel] [PATCH 15/35] tcg-s390: Query instruction extensions that are installed.
Date: Mon, 14 Jun 2010 19:39:41 +0200


Am 14.06.2010 um 18:20 schrieb Richard Henderson <address@hidden>:

On 06/13/2010 03:23 PM, Alexander Graf wrote:
On 13.06.2010, at 18:44, Aurelien Jarno wrote:
Is KVM in 31-bit mode actually functional?

I'm not aware of anything preventing it to be. But I honestly haven't
tried. As long as all hypercall parameters stay within the first
32/31 bits, things should be safe.

On the other hand, is there any point in supporting it?
This does seem to be a case for which it does seem like
having the extra VM space (KVM+TCG) and the extra register
size (TCG) is extremely helpful.

I'd be just as happy to adjust the configury to actively
prevent compilation in 31-bit mode, rather than pretend
it might work and never bother to test it...

Yeah, I agree. 31-bit is really deprecated by now anyways. Aurelien was the one interested in it.

Alex





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