diff options
| -rw-r--r-- | arch/powerpc/kvm/e500.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/kvm/e500_tlb.c | 88 |
2 files changed, 90 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/e500.h b/arch/powerpc/kvm/e500.h index 7967f3f10a16..aa8b81428bf4 100644 --- a/arch/powerpc/kvm/e500.h +++ b/arch/powerpc/kvm/e500.h @@ -89,6 +89,10 @@ struct kvmppc_vcpu_e500 { u64 *g2h_tlb1_map; unsigned int *h2g_tlb1_rmap; + /* Minimum and maximum address mapped my TLB1 */ + unsigned long tlb1_min_eaddr; + unsigned long tlb1_max_eaddr; + #ifdef CONFIG_KVM_E500V2 u32 pid[E500_PID_NUM]; diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index e05232b746ff..c510fc961302 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -261,6 +261,9 @@ static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500, set_base = gtlb0_set_base(vcpu_e500, eaddr); size = vcpu_e500->gtlb_params[0].ways; } else { + if (eaddr < vcpu_e500->tlb1_min_eaddr || + eaddr > vcpu_e500->tlb1_max_eaddr) + return -1; set_base = 0; } @@ -583,6 +586,65 @@ static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500, return victim; } +static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500) +{ + int size = vcpu_e500->gtlb_params[1].entries; + unsigned int offset; + gva_t eaddr; + int i; + + vcpu_e500->tlb1_min_eaddr = ~0UL; + vcpu_e500->tlb1_max_eaddr = 0; + offset = vcpu_e500->gtlb_offset[1]; + + for (i = 0; i < size; i++) { + struct kvm_book3e_206_tlb_entry *tlbe = + &vcpu_e500->gtlb_arch[offset + i]; + + if (!get_tlb_v(tlbe)) + continue; + + eaddr = get_tlb_eaddr(tlbe); + vcpu_e500->tlb1_min_eaddr = + min(vcpu_e500->tlb1_min_eaddr, eaddr); + + eaddr = get_tlb_end(tlbe); + vcpu_e500->tlb1_max_eaddr = + max(vcpu_e500->tlb1_max_eaddr, eaddr); + } +} + +static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500, + struct kvm_book3e_206_tlb_entry *gtlbe) +{ + unsigned long start, end, size; + + size = get_tlb_bytes(gtlbe); + start = get_tlb_eaddr(gtlbe) & ~(size - 1); + end = start + size - 1; + + return vcpu_e500->tlb1_min_eaddr == start || + vcpu_e500->tlb1_max_eaddr == end; +} + +/* This function is supposed to be called for a adding a new valid tlb entry */ +static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu, + struct kvm_book3e_206_tlb_entry *gtlbe) +{ + unsigned long start, end, size; + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + + if (!get_tlb_v(gtlbe)) + return; + + size = get_tlb_bytes(gtlbe); + start = get_tlb_eaddr(gtlbe) & ~(size - 1); + end = start + size - 1; + + vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start); + vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end); +} + static inline int kvmppc_e500_gtlbe_invalidate( struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int esel) @@ -593,6 +655,9 @@ static inline int kvmppc_e500_gtlbe_invalidate( if (unlikely(get_tlb_iprot(gtlbe))) return -1; + if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) + kvmppc_recalc_tlb1map_range(vcpu_e500); + gtlbe->mas1 = 0; return 0; @@ -792,14 +857,19 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); struct kvm_book3e_206_tlb_entry *gtlbe, stlbe; int tlbsel, esel, stlbsel, sesel; + int recal = 0; tlbsel = get_tlb_tlbsel(vcpu); esel = get_tlb_esel(vcpu, tlbsel); gtlbe = get_entry(vcpu_e500, tlbsel, esel); - if (get_tlb_v(gtlbe)) + if (get_tlb_v(gtlbe)) { inval_gtlbe_on_host(vcpu_e500, tlbsel, esel); + if ((tlbsel == 1) && + kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe)) + recal = 1; + } gtlbe->mas1 = vcpu->arch.shared->mas1; gtlbe->mas2 = vcpu->arch.shared->mas2; @@ -808,6 +878,18 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1, gtlbe->mas2, gtlbe->mas7_3); + if (tlbsel == 1) { + /* + * If a valid tlb1 entry is overwritten then recalculate the + * min/max TLB1 map address range otherwise no need to look + * in tlb1 array. + */ + if (recal) + kvmppc_recalc_tlb1map_range(vcpu_e500); + else + kvmppc_set_tlb1map_range(vcpu, gtlbe); + } + /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */ if (tlbe_is_host_safe(vcpu, gtlbe)) { u64 eaddr; @@ -1145,6 +1227,7 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1]; vcpu_e500->gtlb_params[1].sets = 1; + kvmppc_recalc_tlb1map_range(vcpu_e500); return 0; err_put_page: @@ -1163,7 +1246,7 @@ int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu, struct kvm_dirty_tlb *dirty) { struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); - + kvmppc_recalc_tlb1map_range(vcpu_e500); clear_tlb_refs(vcpu_e500); return 0; } @@ -1272,6 +1355,7 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT; + kvmppc_recalc_tlb1map_range(vcpu_e500); return 0; err: |