diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 170 |
1 files changed, 169 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 60b7300568c..af862c30b70 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -124,6 +124,158 @@ void kvmppc_dump_regs(struct kvm_vcpu *vcpu) vcpu->arch.last_inst); } +struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) +{ + int r; + struct kvm_vcpu *v, *ret = NULL; + + mutex_lock(&kvm->lock); + kvm_for_each_vcpu(r, v, kvm) { + if (v->vcpu_id == id) { + ret = v; + break; + } + } + mutex_unlock(&kvm->lock); + return ret; +} + +static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) +{ + vpa->shared_proc = 1; + vpa->yield_count = 1; +} + +static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, + unsigned long flags, + unsigned long vcpuid, unsigned long vpa) +{ + struct kvm *kvm = vcpu->kvm; + unsigned long pg_index, ra, len; + unsigned long pg_offset; + void *va; + struct kvm_vcpu *tvcpu; + + tvcpu = kvmppc_find_vcpu(kvm, vcpuid); + if (!tvcpu) + return H_PARAMETER; + + flags >>= 63 - 18; + flags &= 7; + if (flags == 0 || flags == 4) + return H_PARAMETER; + if (flags < 4) { + if (vpa & 0x7f) + return H_PARAMETER; + /* registering new area; convert logical addr to real */ + pg_index = vpa >> kvm->arch.ram_porder; + pg_offset = vpa & (kvm->arch.ram_psize - 1); + if (pg_index >= kvm->arch.ram_npages) + return H_PARAMETER; + if (kvm->arch.ram_pginfo[pg_index].pfn == 0) + return H_PARAMETER; + ra = kvm->arch.ram_pginfo[pg_index].pfn << PAGE_SHIFT; + ra |= pg_offset; + va = __va(ra); + if (flags <= 1) + len = *(unsigned short *)(va + 4); + else + len = *(unsigned int *)(va + 4); + if (pg_offset + len > kvm->arch.ram_psize) + return H_PARAMETER; + switch (flags) { + case 1: /* register VPA */ + if (len < 640) + return H_PARAMETER; + tvcpu->arch.vpa = va; + init_vpa(vcpu, va); + break; + case 2: /* register DTL */ + if (len < 48) + return H_PARAMETER; + if (!tvcpu->arch.vpa) + return H_RESOURCE; + len -= len % 48; + tvcpu->arch.dtl = va; + tvcpu->arch.dtl_end = va + len; + break; + case 3: /* register SLB shadow buffer */ + if (len < 8) + return H_PARAMETER; + if (!tvcpu->arch.vpa) + return H_RESOURCE; + tvcpu->arch.slb_shadow = va; + len = (len - 16) / 16; + tvcpu->arch.slb_shadow = va; + break; + } + } else { + switch (flags) { + case 5: /* unregister VPA */ + if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl) + return H_RESOURCE; + tvcpu->arch.vpa = NULL; + break; + case 6: /* unregister DTL */ + tvcpu->arch.dtl = NULL; + break; + case 7: /* unregister SLB shadow buffer */ + tvcpu->arch.slb_shadow = NULL; + break; + } + } + return H_SUCCESS; +} + +int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) +{ + unsigned long req = kvmppc_get_gpr(vcpu, 3); + unsigned long target, ret = H_SUCCESS; + struct kvm_vcpu *tvcpu; + + switch (req) { + case H_CEDE: + vcpu->arch.shregs.msr |= MSR_EE; + vcpu->arch.ceded = 1; + smp_mb(); + if (!vcpu->arch.prodded) + kvmppc_vcpu_block(vcpu); + else + vcpu->arch.prodded = 0; + smp_mb(); + vcpu->arch.ceded = 0; + break; + case H_PROD: + target = kvmppc_get_gpr(vcpu, 4); + tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); + if (!tvcpu) { + ret = H_PARAMETER; + break; + } + tvcpu->arch.prodded = 1; + smp_mb(); + if (vcpu->arch.ceded) { + if (waitqueue_active(&vcpu->wq)) { + wake_up_interruptible(&vcpu->wq); + vcpu->stat.halt_wakeup++; + } + } + break; + case H_CONFER: + break; + case H_REGISTER_VPA: + ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), + kvmppc_get_gpr(vcpu, 5), + kvmppc_get_gpr(vcpu, 6)); + break; + default: + return RESUME_HOST; + } + kvmppc_set_gpr(vcpu, 3, ret); + vcpu->arch.hcall_needed = 0; + return RESUME_GUEST; +} + static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, struct task_struct *tsk) { @@ -318,7 +470,7 @@ void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); -int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) +static int kvmppc_run_vcpu(struct kvm_run *run, struct kvm_vcpu *vcpu) { u64 now; @@ -370,6 +522,22 @@ int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) return -EBUSY; } +int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) +{ + int r; + + do { + r = kvmppc_run_vcpu(run, vcpu); + + if (run->exit_reason == KVM_EXIT_PAPR_HCALL && + !(vcpu->arch.shregs.msr & MSR_PR)) { + r = kvmppc_pseries_do_hcall(vcpu); + kvmppc_core_deliver_interrupts(vcpu); + } + } while (r == RESUME_GUEST); + return r; +} + int kvmppc_core_prepare_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem) { |