From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [RFC PATCH 02/10] KVM: PPC: BOOK3S: PR: Emulate virtual
 timebase register
Date: Thu, 30 Jan 2014 09:54:41 +1100
Message-ID: <1391036081.8524.80.camel@pasglop>
References: <1390927455-3312-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
	 <1390927455-3312-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
	 <52E92EC6.2030607@suse.de>
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Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	paulus@samba.org, linuxppc-dev@lists.ozlabs.org,
	kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
To: Alexander Graf <agraf@suse.de>
Return-path: <kvm-ppc-owner@vger.kernel.org>
In-Reply-To: <52E92EC6.2030607@suse.de>
Sender: kvm-ppc-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

On Wed, 2014-01-29 at 17:39 +0100, Alexander Graf wrote:
> static inline mfvtb(unsigned long)
> {
> #ifdef CONFIG_PPC_BOOK3S_64
>      return mfspr(SPRN_VTB);
> #else
>      BUG();
> #endif
> }
> 
> is a lot easier to read and get right. But reg.h is Ben's call.

Agreed.

> Also could you please give me a pointer to the specification for it? I 
> tried to look up vtb in the 2.06 ISA and couldn't find it. Is it a CPU 
> specific register?