linux-kernel - Re: [PATCH 1/4] KVM: PPC: Add support for multiple-TCE hcalls

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Message-ID: <1371458225.21896.153.camel@pasglop>
Date:	Mon, 17 Jun 2013 18:37:05 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Alexey Kardashevskiy <aik@...abs.ru>
Cc:	Alexander Graf <agraf@...e.de>, linuxppc-dev@...ts.ozlabs.org,
	David Gibson <david@...son.dropbear.id.au>,
	Paul Mackerras <paulus@...ba.org>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, kvm-ppc@...r.kernel.org
Subject: Re: [PATCH 1/4] KVM: PPC: Add support for multiple-TCE hcalls

On Mon, 2013-06-17 at 17:55 +1000, Alexey Kardashevskiy wrote:
> David:
> ===
> So, in the case of MULTITCE, that's not quite right.  PR KVM can
> emulate a PAPR system on a BookE machine, and there's no reason not to
> allow TCE acceleration as well.  We can't make it dependent on PAPR
> mode being selected, because that's enabled per-vcpu, whereas these
> capabilities are queried on the VM before the vcpus are created.
> ===
> 
> Wrong?

The capability just tells qemu the kernel supports it, it doesn't have
to depend on PAPR mode, qemu can sort things out no ?

Cheers,
Ben.


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