1/* 2 * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved. 3 * 4 * Author: Yu Liu, <yu.liu@freescale.com> 5 * 6 * Description: 7 * This file is derived from arch/powerpc/kvm/44x.c, 8 * by Hollis Blanchard <hollisb@us.ibm.com>. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License, version 2, as 12 * published by the Free Software Foundation. 13 */ 14 15#include <linux/kvm_host.h> 16#include <linux/slab.h> 17#include <linux/err.h> 18 19#include <asm/reg.h> 20#include <asm/cputable.h> 21#include <asm/tlbflush.h> 22#include <asm/kvm_e500.h> 23#include <asm/kvm_ppc.h> 24 25#include "booke.h" 26#include "e500_tlb.h" 27 28void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu) 29{ 30} 31 32void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu) 33{ 34} 35 36void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 37{ 38 kvmppc_e500_tlb_load(vcpu, cpu); 39} 40 41void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 42{ 43 kvmppc_e500_tlb_put(vcpu); 44} 45 46int kvmppc_core_check_processor_compat(void) 47{ 48 int r; 49 50 if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0) 51 r = 0; 52 else 53 r = -ENOTSUPP; 54 55 return r; 56} 57 58int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) 59{ 60 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 61 62 kvmppc_e500_tlb_setup(vcpu_e500); 63 64 /* Registers init */ 65 vcpu->arch.pvr = mfspr(SPRN_PVR); 66 67 /* Since booke kvm only support one core, update all vcpus' PIR to 0 */ 68 vcpu->vcpu_id = 0; 69 70 return 0; 71} 72 73/* 'linear_address' is actually an encoding of AS|PID|EADDR . */ 74int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, 75 struct kvm_translation *tr) 76{ 77 int index; 78 gva_t eaddr; 79 u8 pid; 80 u8 as; 81 82 eaddr = tr->linear_address; 83 pid = (tr->linear_address >> 32) & 0xff; 84 as = (tr->linear_address >> 40) & 0x1; 85 86 index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as); 87 if (index < 0) { 88 tr->valid = 0; 89 return 0; 90 } 91 92 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); 93 tr->valid = 1; 94 95 return 0; 96} 97 98struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 99{ 100 struct kvmppc_vcpu_e500 *vcpu_e500; 101 struct kvm_vcpu *vcpu; 102 int err; 103 104 vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); 105 if (!vcpu_e500) { 106 err = -ENOMEM; 107 goto out; 108 } 109 110 vcpu = &vcpu_e500->vcpu; 111 err = kvm_vcpu_init(vcpu, kvm, id); 112 if (err) 113 goto free_vcpu; 114 115 err = kvmppc_e500_tlb_init(vcpu_e500); 116 if (err) 117 goto uninit_vcpu; 118 119 return vcpu; 120 121uninit_vcpu: 122 kvm_vcpu_uninit(vcpu); 123free_vcpu: 124 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 125out: 126 return ERR_PTR(err); 127} 128 129void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 130{ 131 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 132 133 kvmppc_e500_tlb_uninit(vcpu_e500); 134 kvm_vcpu_uninit(vcpu); 135 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 136} 137 138static int __init kvmppc_e500_init(void) 139{ 140 int r, i; 141 unsigned long ivor[3]; 142 unsigned long max_ivor = 0; 143 144 r = kvmppc_booke_init(); 145 if (r) 146 return r; 147 148 /* copy extra E500 exception handlers */ 149 ivor[0] = mfspr(SPRN_IVOR32); 150 ivor[1] = mfspr(SPRN_IVOR33); 151 ivor[2] = mfspr(SPRN_IVOR34); 152 for (i = 0; i < 3; i++) { 153 if (ivor[i] > max_ivor) 154 max_ivor = ivor[i]; 155 156 memcpy((void *)kvmppc_booke_handlers + ivor[i], 157 kvmppc_handlers_start + (i + 16) * kvmppc_handler_len, 158 kvmppc_handler_len); 159 } 160 flush_icache_range(kvmppc_booke_handlers, 161 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 162 163 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); 164} 165 166static void __exit kvmppc_e500_exit(void) 167{ 168 kvmppc_booke_exit(); 169} 170 171module_init(kvmppc_e500_init); 172module_exit(kvmppc_e500_exit); 173