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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 | /* * Copyright (C) 2011. Freescale Inc. All rights reserved. * * Authors: * Alexander Graf <agraf@suse.de> * Paul Mackerras <paulus@samba.org> * * Description: * * Hypercall handling for running PAPR guests in PR KVM on Book 3S * processors. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as * published by the Free Software Foundation. */ #include <linux/anon_inodes.h> #include <asm/uaccess.h> #include <asm/kvm_ppc.h> #include <asm/kvm_book3s.h> static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index) { struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu); unsigned long pteg_addr; pte_index <<= 4; pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70; pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL; pteg_addr |= pte_index; return pteg_addr; } static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu) { long flags = kvmppc_get_gpr(vcpu, 4); long pte_index = kvmppc_get_gpr(vcpu, 5); unsigned long pteg[2 * 8]; unsigned long pteg_addr, i, *hpte; pte_index &= ~7UL; pteg_addr = get_pteg_addr(vcpu, pte_index); copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg)); hpte = pteg; if (likely((flags & H_EXACT) == 0)) { pte_index &= ~7UL; for (i = 0; ; ++i) { if (i == 8) return H_PTEG_FULL; if ((*hpte & HPTE_V_VALID) == 0) break; hpte += 2; } } else { i = kvmppc_get_gpr(vcpu, 5) & 7UL; hpte += i * 2; } hpte[0] = kvmppc_get_gpr(vcpu, 6); hpte[1] = kvmppc_get_gpr(vcpu, 7); copy_to_user((void __user *)pteg_addr, pteg, sizeof(pteg)); kvmppc_set_gpr(vcpu, 3, H_SUCCESS); kvmppc_set_gpr(vcpu, 4, pte_index | i); return EMULATE_DONE; } static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu) { unsigned long flags= kvmppc_get_gpr(vcpu, 4); unsigned long pte_index = kvmppc_get_gpr(vcpu, 5); unsigned long avpn = kvmppc_get_gpr(vcpu, 6); unsigned long v = 0, pteg, rb; unsigned long pte[2]; pteg = get_pteg_addr(vcpu, pte_index); copy_from_user(pte, (void __user *)pteg, sizeof(pte)); if ((pte[0] & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) || ((flags & H_ANDCOND) && (pte[0] & avpn) != 0)) { kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND); return EMULATE_DONE; } copy_to_user((void __user *)pteg, &v, sizeof(v)); rb = compute_tlbie_rb(pte[0], pte[1], pte_index); vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); kvmppc_set_gpr(vcpu, 3, H_SUCCESS); kvmppc_set_gpr(vcpu, 4, pte[0]); kvmppc_set_gpr(vcpu, 5, pte[1]); return EMULATE_DONE; } /* Request defs for kvmppc_h_pr_bulk_remove() */ #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL #define H_BULK_REMOVE_END 0xc000000000000000ULL #define H_BULK_REMOVE_CODE 0x3000000000000000ULL #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL #define H_BULK_REMOVE_PARM 0x2000000000000000ULL #define H_BULK_REMOVE_HW 0x3000000000000000ULL #define H_BULK_REMOVE_RC 0x0c00000000000000ULL #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL #define H_BULK_REMOVE_MAX_BATCH 4 static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu) { int i; int paramnr = 4; int ret = H_SUCCESS; for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) { unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i)); unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1); unsigned long pteg, rb, flags; unsigned long pte[2]; unsigned long v = 0; if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) { break; /* Exit success */ } else if ((tsh & H_BULK_REMOVE_TYPE) != H_BULK_REMOVE_REQUEST) { ret = H_PARAMETER; break; /* Exit fail */ } tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS; tsh |= H_BULK_REMOVE_RESPONSE; if ((tsh & H_BULK_REMOVE_ANDCOND) && (tsh & H_BULK_REMOVE_AVPN)) { tsh |= H_BULK_REMOVE_PARM; kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh); ret = H_PARAMETER; break; /* Exit fail */ } pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX); copy_from_user(pte, (void __user *)pteg, sizeof(pte)); /* tsl = AVPN */ flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26; if ((pte[0] & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) || ((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) { tsh |= H_BULK_REMOVE_NOT_FOUND; } else { /* Splat the pteg in (userland) hpt */ copy_to_user((void __user *)pteg, &v, sizeof(v)); rb = compute_tlbie_rb(pte[0], pte[1], tsh & H_BULK_REMOVE_PTEX); vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); tsh |= H_BULK_REMOVE_SUCCESS; tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43; } kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh); } kvmppc_set_gpr(vcpu, 3, ret); return EMULATE_DONE; } static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu) { unsigned long flags = kvmppc_get_gpr(vcpu, 4); unsigned long pte_index = kvmppc_get_gpr(vcpu, 5); unsigned long avpn = kvmppc_get_gpr(vcpu, 6); unsigned long rb, pteg, r, v; unsigned long pte[2]; pteg = get_pteg_addr(vcpu, pte_index); copy_from_user(pte, (void __user *)pteg, sizeof(pte)); if ((pte[0] & HPTE_V_VALID) == 0 || ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn)) { kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND); return EMULATE_DONE; } v = pte[0]; r = pte[1]; r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI | HPTE_R_KEY_LO); r |= (flags << 55) & HPTE_R_PP0; r |= (flags << 48) & HPTE_R_KEY_HI; r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO); pte[1] = r; rb = compute_tlbie_rb(v, r, pte_index); vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); copy_to_user((void __user *)pteg, pte, sizeof(pte)); kvmppc_set_gpr(vcpu, 3, H_SUCCESS); return EMULATE_DONE; } static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu) { unsigned long liobn = kvmppc_get_gpr(vcpu, 4); unsigned long ioba = kvmppc_get_gpr(vcpu, 5); unsigned long tce = kvmppc_get_gpr(vcpu, 6); long rc; rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce); if (rc == H_TOO_HARD) return EMULATE_FAIL; kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd) { long rc = kvmppc_xics_hcall(vcpu, cmd); kvmppc_set_gpr(vcpu, 3, rc); return EMULATE_DONE; } int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) { switch (cmd) { case H_ENTER: return kvmppc_h_pr_enter(vcpu); case H_REMOVE: return kvmppc_h_pr_remove(vcpu); case H_PROTECT: return kvmppc_h_pr_protect(vcpu); case H_BULK_REMOVE: return kvmppc_h_pr_bulk_remove(vcpu); case H_PUT_TCE: return kvmppc_h_pr_put_tce(vcpu); case H_CEDE: vcpu->arch.shared->msr |= MSR_EE; kvm_vcpu_block(vcpu); clear_bit(KVM_REQ_UNHALT, &vcpu->requests); vcpu->stat.halt_wakeup++; return EMULATE_DONE; case H_XIRR: case H_CPPR: case H_EOI: case H_IPI: case H_IPOLL: case H_XIRR_X: if (kvmppc_xics_enabled(vcpu)) return kvmppc_h_pr_xics_hcall(vcpu, cmd); break; case H_RTAS: if (list_empty(&vcpu->kvm->arch.rtas_tokens)) return RESUME_HOST; if (kvmppc_rtas_hcall(vcpu)) break; kvmppc_set_gpr(vcpu, 3, 0); return EMULATE_DONE; } return EMULATE_FAIL; } |