| Message ID | 1364335512-28426-6-git-send-email-mihai.caraman@freescale.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 26.03.2013, at 23:05, 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 > and E.HV.LRAT categories from VCPUs. > > Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> > --- > v2: > - Remove E.HV.LRAT from vcpus > > arch/powerpc/kvm/e500_mmu.c | 6 ++++++ > 1 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c > index cf60db1..0d2a293 100644 > --- a/arch/powerpc/kvm/e500_mmu.c > +++ b/arch/powerpc/kvm/e500_mmu.c > @@ -867,11 +867,17 @@ static int vcpu_mmu_init(struct kvm_vcpu *vcpu, > vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT; > > if (has_feature(vcpu, VCPU_FTR_MMU_V2)) { > + vcpu->arch.mmucfg &= ~MMUCFG_LRAT; > + > if (has_feature(vcpu, VCPU_FTR_E_PT)) > vcpu->arch.eptcfg = mfspr(SPRN_EPTCFG); > else > vcpu->arch.eptcfg = 0; > > + /* Guest mmu emulation currently doesn't handle E.PT */ > + vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT; > + vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND; Can we make this conditional on bits in EPTCFG? Then by initializing it to 0 today, we always mask PT/IND out, but later when we support EPT, we only have to set the bit in EPTCFG and everyone's happy? Alex > + > vcpu->arch.tlbps[0] = mfspr(SPRN_TLB0PS); > vcpu->arch.tlbps[1] = mfspr(SPRN_TLB1PS); > } > -- > 1.7.4.1 > > > -- > To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 03/26/2013 05:05:10 PM, 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 > and E.HV.LRAT categories from VCPUs. > > Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> > --- > v2: > - Remove E.HV.LRAT from vcpus > > arch/powerpc/kvm/e500_mmu.c | 6 ++++++ > 1 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c > index cf60db1..0d2a293 100644 > --- a/arch/powerpc/kvm/e500_mmu.c > +++ b/arch/powerpc/kvm/e500_mmu.c > @@ -867,11 +867,17 @@ static int vcpu_mmu_init(struct kvm_vcpu *vcpu, > vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT; > > if (has_feature(vcpu, VCPU_FTR_MMU_V2)) { > + vcpu->arch.mmucfg &= ~MMUCFG_LRAT; > + > if (has_feature(vcpu, VCPU_FTR_E_PT)) > vcpu->arch.eptcfg = mfspr(SPRN_EPTCFG); > else > vcpu->arch.eptcfg = 0; > > + /* Guest mmu emulation currently doesn't handle E.PT */ > + vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT; > + vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND; You're clearing these bits *after* calling has_feature() -- doesn't has_feature() depend on those bits being cleared to not advertise E_PT support? -Scott -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c index cf60db1..0d2a293 100644 --- a/arch/powerpc/kvm/e500_mmu.c +++ b/arch/powerpc/kvm/e500_mmu.c @@ -867,11 +867,17 @@ static int vcpu_mmu_init(struct kvm_vcpu *vcpu, vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT; if (has_feature(vcpu, VCPU_FTR_MMU_V2)) { + vcpu->arch.mmucfg &= ~MMUCFG_LRAT; + if (has_feature(vcpu, VCPU_FTR_E_PT)) vcpu->arch.eptcfg = mfspr(SPRN_EPTCFG); else vcpu->arch.eptcfg = 0; + /* Guest mmu emulation currently doesn't handle E.PT */ + vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT; + vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND; + vcpu->arch.tlbps[0] = mfspr(SPRN_TLB0PS); vcpu->arch.tlbps[1] = mfspr(SPRN_TLB1PS); }
Embedded.Page Table (E.PT) category in VMs requires indirect tlb entries emulation which is not supported yet. Configure TLBnCFG to remove E.PT and E.HV.LRAT categories from VCPUs. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> --- v2: - Remove E.HV.LRAT from vcpus arch/powerpc/kvm/e500_mmu.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)