[PATCH 14/27] KVM: PPC: Magic Page BookE support

[Liu Yu-B13201]

> -----Original Message-----
> From: kvm-owner at vger.kernel.org 
> [mailto:kvm-owner at vger.kernel.org] On Behalf Of Alexander Graf
> Sent: Thursday, July 01, 2010 6:43 PM
> To: kvm-ppc at vger.kernel.org
> Cc: KVM list; linuxppc-dev
> Subject: [PATCH 14/27] KVM: PPC: Magic Page BookE support
> 
> As we now have Book3s support for the magic page, we also 
> need BookE to
> join in on the party.
> 
> This patch implements generic magic page logic for BookE and specific
> TLB logic for e500. I didn't have any 440 around, so I didn't dare to
> blindly try and write up broken code.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>
> ---
>  arch/powerpc/kvm/booke.c    |   29 +++++++++++++++++++++++++++++
>  arch/powerpc/kvm/e500_tlb.c |   19 +++++++++++++++++--
>  2 files changed, 46 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
> index 0f8ff9d..9609207 100644
> --- a/arch/powerpc/kvm/booke.c
> +++ b/arch/powerpc/kvm/booke.c

> @@ -380,6 +406,9 @@ int kvmppc_handle_exit(struct kvm_run 
> *run, struct kvm_vcpu *vcpu,
>  		gpa_t gpaddr;
>  		gfn_t gfn;
>  
> +		if (kvmppc_dtlb_magic_page(vcpu, eaddr))
> +			break;
> +
>  		/* Check the guest TLB. */
>  		gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
>  		if (gtlb_index < 0) {

How about moving this part into tlb search fail path?