[PATCH 3/5] KVM: PPC: e500: Remove E.PT category from VCPUs
Alexander Graf
agraf at suse.de
Fri Feb 1 00:27:10 EST 2013
On 30.01.2013, at 14:29, Mihai Caraman wrote:
> Embedded.Page Table (E.PT) category in VMs requires indirect tlb entries
> emulation which is not supported yet. Configure TLBnCFG to remove E.PT
> category from VCPUs.
>
> Signed-off-by: Mihai Caraman <mihai.caraman at freescale.com>
Please do this in a separate function that you call from these locations. That way the code is self-documenting on what it actually does.
Also add a comment to this one function that removes E.PT related bits from TLBCFG that our _guest_ mmu emulation currently doesn't handle E.PT.
Alex
> ---
> arch/powerpc/kvm/e500_mmu.c | 10 ++++++----
> 1 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
> index 129299a..9a1f7b7 100644
> --- a/arch/powerpc/kvm/e500_mmu.c
> +++ b/arch/powerpc/kvm/e500_mmu.c
> @@ -692,12 +692,14 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
> vcpu_e500->gtlb_offset[0] = 0;
> vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];
>
> - vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
> + vcpu->arch.tlbcfg[0] &=
> + ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC | TLBnCFG_IND);
> if (params.tlb_sizes[0] <= 2048)
> vcpu->arch.tlbcfg[0] |= params.tlb_sizes[0];
> vcpu->arch.tlbcfg[0] |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
>
> - vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
> + vcpu->arch.tlbcfg[1] &=
> + ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC | TLBnCFG_IND);
> vcpu->arch.tlbcfg[1] |= params.tlb_sizes[1];
> vcpu->arch.tlbcfg[1] |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
>
> @@ -783,13 +785,13 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
>
> /* Init TLB configuration register */
> vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
> - ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
> + ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC | TLBnCFG_IND);
> vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries;
> vcpu->arch.tlbcfg[0] |=
> vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;
>
> vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
> - ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
> + ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC | TLBnCFG_IND);
> vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].entries;
> vcpu->arch.tlbcfg[1] |=
> vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;
> --
> 1.7.4.1
>
>
> --
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