e500.c 6.5 KB

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  1. /*
  2. * Copyright (C) 2008-2011 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. #include <linux/kvm_host.h>
  15. #include <linux/slab.h>
  16. #include <linux/err.h>
  17. #include <linux/export.h>
  18. #include <asm/reg.h>
  19. #include <asm/cputable.h>
  20. #include <asm/tlbflush.h>
  21. #include <asm/kvm_e500.h>
  22. #include <asm/kvm_ppc.h>
  23. #include "booke.h"
  24. #include "e500.h"
  25. void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
  26. {
  27. }
  28. void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
  29. {
  30. }
  31. void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
  32. {
  33. kvmppc_booke_vcpu_load(vcpu, cpu);
  34. kvmppc_e500_tlb_load(vcpu, cpu);
  35. }
  36. void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
  37. {
  38. kvmppc_e500_tlb_put(vcpu);
  39. #ifdef CONFIG_SPE
  40. if (vcpu->arch.shadow_msr & MSR_SPE)
  41. kvmppc_vcpu_disable_spe(vcpu);
  42. #endif
  43. kvmppc_booke_vcpu_put(vcpu);
  44. }
  45. int kvmppc_core_check_processor_compat(void)
  46. {
  47. int r;
  48. if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
  49. r = 0;
  50. else
  51. r = -ENOTSUPP;
  52. return r;
  53. }
  54. int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
  55. {
  56. struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
  57. kvmppc_e500_tlb_setup(vcpu_e500);
  58. /* Registers init */
  59. vcpu->arch.pvr = mfspr(SPRN_PVR);
  60. vcpu_e500->svr = mfspr(SPRN_SVR);
  61. vcpu->arch.cpu_type = KVM_CPU_E500V2;
  62. return 0;
  63. }
  64. /* 'linear_address' is actually an encoding of AS|PID|EADDR . */
  65. int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
  66. struct kvm_translation *tr)
  67. {
  68. int index;
  69. gva_t eaddr;
  70. u8 pid;
  71. u8 as;
  72. eaddr = tr->linear_address;
  73. pid = (tr->linear_address >> 32) & 0xff;
  74. as = (tr->linear_address >> 40) & 0x1;
  75. index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
  76. if (index < 0) {
  77. tr->valid = 0;
  78. return 0;
  79. }
  80. tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
  81. /* XXX what does "writeable" and "usermode" even mean? */
  82. tr->valid = 1;
  83. return 0;
  84. }
  85. void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
  86. {
  87. struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
  88. sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_SPE |
  89. KVM_SREGS_E_PM;
  90. sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
  91. sregs->u.e.impl.fsl.features = 0;
  92. sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
  93. sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
  94. sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
  95. sregs->u.e.mas0 = vcpu->arch.shared->mas0;
  96. sregs->u.e.mas1 = vcpu->arch.shared->mas1;
  97. sregs->u.e.mas2 = vcpu->arch.shared->mas2;
  98. sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
  99. sregs->u.e.mas4 = vcpu->arch.shared->mas4;
  100. sregs->u.e.mas6 = vcpu->arch.shared->mas6;
  101. sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
  102. sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
  103. sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
  104. sregs->u.e.tlbcfg[2] = 0;
  105. sregs->u.e.tlbcfg[3] = 0;
  106. sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
  107. sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
  108. sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
  109. sregs->u.e.ivor_high[3] =
  110. vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
  111. kvmppc_get_sregs_ivor(vcpu, sregs);
  112. }
  113. int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
  114. {
  115. struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
  116. if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
  117. vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
  118. vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
  119. vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
  120. }
  121. if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
  122. vcpu->arch.shared->mas0 = sregs->u.e.mas0;
  123. vcpu->arch.shared->mas1 = sregs->u.e.mas1;
  124. vcpu->arch.shared->mas2 = sregs->u.e.mas2;
  125. vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
  126. vcpu->arch.shared->mas4 = sregs->u.e.mas4;
  127. vcpu->arch.shared->mas6 = sregs->u.e.mas6;
  128. }
  129. if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
  130. return 0;
  131. if (sregs->u.e.features & KVM_SREGS_E_SPE) {
  132. vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
  133. sregs->u.e.ivor_high[0];
  134. vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
  135. sregs->u.e.ivor_high[1];
  136. vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
  137. sregs->u.e.ivor_high[2];
  138. }
  139. if (sregs->u.e.features & KVM_SREGS_E_PM) {
  140. vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
  141. sregs->u.e.ivor_high[3];
  142. }
  143. return kvmppc_set_sregs_ivor(vcpu, sregs);
  144. }
  145. struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
  146. {
  147. struct kvmppc_vcpu_e500 *vcpu_e500;
  148. struct kvm_vcpu *vcpu;
  149. int err;
  150. vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
  151. if (!vcpu_e500) {
  152. err = -ENOMEM;
  153. goto out;
  154. }
  155. vcpu = &vcpu_e500->vcpu;
  156. err = kvm_vcpu_init(vcpu, kvm, id);
  157. if (err)
  158. goto free_vcpu;
  159. err = kvmppc_e500_tlb_init(vcpu_e500);
  160. if (err)
  161. goto uninit_vcpu;
  162. vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  163. if (!vcpu->arch.shared)
  164. goto uninit_tlb;
  165. return vcpu;
  166. uninit_tlb:
  167. kvmppc_e500_tlb_uninit(vcpu_e500);
  168. uninit_vcpu:
  169. kvm_vcpu_uninit(vcpu);
  170. free_vcpu:
  171. kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
  172. out:
  173. return ERR_PTR(err);
  174. }
  175. void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
  176. {
  177. struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
  178. free_page((unsigned long)vcpu->arch.shared);
  179. kvm_vcpu_uninit(vcpu);
  180. kvmppc_e500_tlb_uninit(vcpu_e500);
  181. kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
  182. }
  183. int kvmppc_core_init_vm(struct kvm *kvm)
  184. {
  185. return 0;
  186. }
  187. void kvmppc_core_destroy_vm(struct kvm *kvm)
  188. {
  189. }
  190. static int __init kvmppc_e500_init(void)
  191. {
  192. int r, i;
  193. unsigned long ivor[3];
  194. unsigned long max_ivor = 0;
  195. r = kvmppc_core_check_processor_compat();
  196. if (r)
  197. return r;
  198. r = kvmppc_booke_init();
  199. if (r)
  200. return r;
  201. /* copy extra E500 exception handlers */
  202. ivor[0] = mfspr(SPRN_IVOR32);
  203. ivor[1] = mfspr(SPRN_IVOR33);
  204. ivor[2] = mfspr(SPRN_IVOR34);
  205. for (i = 0; i < 3; i++) {
  206. if (ivor[i] > max_ivor)
  207. max_ivor = ivor[i];
  208. memcpy((void *)kvmppc_booke_handlers + ivor[i],
  209. kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
  210. kvmppc_handler_len);
  211. }
  212. flush_icache_range(kvmppc_booke_handlers,
  213. kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
  214. return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
  215. }
  216. static void __exit kvmppc_e500_exit(void)
  217. {
  218. kvmppc_booke_exit();
  219. }
  220. module_init(kvmppc_e500_init);
  221. module_exit(kvmppc_e500_exit);