On 06.08.2013, at 06:18, Paul Mackerras wrote: > This adds the code to interpret 64k HPTEs in the guest hashed page > table (HPT), 64k SLB entries, and to tell the guest about 64k pages > in kvm_vm_ioctl_get_smmu_info(). Guest 64k pages are still shadowed > by 4k pages. > > This also adds another hash table to the four we have already in > book3s_mmu_hpte.c to allow us to find all the PTEs that we have > instantiated that match a given 64k guest page. > > The tlbie instruction changed starting with POWER6 to use a bit in > the RB operand to indicate large page invalidations, and to use other > RB bits to indicate the base and actual page sizes and the segment > size. 64k pages came in slightly earlier, with POWER5++. At present > we use one bit in vcpu->arch.hflags to indicate that the emulated > cpu supports 64k pages and also has the new tlbie definition. If > we ever want to support emulation of POWER5++, we will need to use > another bit. > > Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx> > --- > arch/powerpc/include/asm/kvm_asm.h | 1 + > arch/powerpc/include/asm/kvm_book3s.h | 6 +++ > arch/powerpc/include/asm/kvm_host.h | 4 ++ > arch/powerpc/kvm/book3s_64_mmu.c | 92 +++++++++++++++++++++++++++++++---- > arch/powerpc/kvm/book3s_mmu_hpte.c | 50 +++++++++++++++++++ > arch/powerpc/kvm/book3s_pr.c | 30 +++++++++++- > 6 files changed, 173 insertions(+), 10 deletions(-) > > [...] > @@ -1127,8 +1144,13 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) > goto uninit_vcpu; > > #ifdef CONFIG_PPC_BOOK3S_64 > - /* default to book3s_64 (970fx) */ > + /* > + * Default to the same as the host if we're on a POWER7[+], > + * otherwise default to PPC970FX. > + */ > vcpu->arch.pvr = 0x3C0301; > + if (cpu_has_feature(CPU_FTR_ARCH_206)) > + vcpu->arch.pvr = mfspr(SPRN_PVR); Unrelated change? Also, why? Any reasonable user space these days should set PVR anyways. > #else > /* default to book3s_32 (750) */ > vcpu->arch.pvr = 0x84202; > @@ -1331,6 +1353,12 @@ int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info) > info->sps[1].enc[0].page_shift = 24; > info->sps[1].enc[0].pte_enc = 0; > > + /* 64k large page size */ > + info->sps[2].page_shift = 16; > + info->sps[2].slb_enc = SLB_VSID_L | SLB_VSID_LP_01; > + info->sps[2].enc[0].page_shift = 16; > + info->sps[2].enc[0].pte_enc = 1; We only support this with BOOK3S_HFLAG_MULTI_PGSIZE, no? Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
