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Diffstat (limited to 'arch/powerpc/kvm/emulate.c')
-rw-r--r--arch/powerpc/kvm/emulate.c221
1 files changed, 121 insertions, 100 deletions
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index ee04abaefe23..b0855e5d8905 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -131,6 +131,125 @@ u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb)
131 return vcpu->arch.dec - jd; 131 return vcpu->arch.dec - jd;
132} 132}
133 133
134static int kvmppc_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
135{
136 enum emulation_result emulated = EMULATE_DONE;
137 ulong spr_val = kvmppc_get_gpr(vcpu, rs);
138
139 switch (sprn) {
140 case SPRN_SRR0:
141 vcpu->arch.shared->srr0 = spr_val;
142 break;
143 case SPRN_SRR1:
144 vcpu->arch.shared->srr1 = spr_val;
145 break;
146
147 /* XXX We need to context-switch the timebase for
148 * watchdog and FIT. */
149 case SPRN_TBWL: break;
150 case SPRN_TBWU: break;
151
152 case SPRN_MSSSR0: break;
153
154 case SPRN_DEC:
155 vcpu->arch.dec = spr_val;
156 kvmppc_emulate_dec(vcpu);
157 break;
158
159 case SPRN_SPRG0:
160 vcpu->arch.shared->sprg0 = spr_val;
161 break;
162 case SPRN_SPRG1:
163 vcpu->arch.shared->sprg1 = spr_val;
164 break;
165 case SPRN_SPRG2:
166 vcpu->arch.shared->sprg2 = spr_val;
167 break;
168 case SPRN_SPRG3:
169 vcpu->arch.shared->sprg3 = spr_val;
170 break;
171
172 default:
173 emulated = kvmppc_core_emulate_mtspr(vcpu, sprn,
174 spr_val);
175 if (emulated == EMULATE_FAIL)
176 printk(KERN_INFO "mtspr: unknown spr "
177 "0x%x\n", sprn);
178 break;
179 }
180
181 kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS);
182
183 return emulated;
184}
185
186static int kvmppc_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
187{
188 enum emulation_result emulated = EMULATE_DONE;
189 ulong spr_val = 0;
190
191 switch (sprn) {
192 case SPRN_SRR0:
193 spr_val = vcpu->arch.shared->srr0;
194 break;
195 case SPRN_SRR1:
196 spr_val = vcpu->arch.shared->srr1;
197 break;
198 case SPRN_PVR:
199 spr_val = vcpu->arch.pvr;
200 break;
201 case SPRN_PIR:
202 spr_val = vcpu->vcpu_id;
203 break;
204 case SPRN_MSSSR0:
205 spr_val = 0;
206 break;
207
208 /* Note: mftb and TBRL/TBWL are user-accessible, so
209 * the guest can always access the real TB anyways.
210 * In fact, we probably will never see these traps. */
211 case SPRN_TBWL:
212 spr_val = get_tb() >> 32;
213 break;
214 case SPRN_TBWU:
215 spr_val = get_tb();
216 break;
217
218 case SPRN_SPRG0:
219 spr_val = vcpu->arch.shared->sprg0;
220 break;
221 case SPRN_SPRG1:
222 spr_val = vcpu->arch.shared->sprg1;
223 break;
224 case SPRN_SPRG2:
225 spr_val = vcpu->arch.shared->sprg2;
226 break;
227 case SPRN_SPRG3:
228 spr_val = vcpu->arch.shared->sprg3;
229 break;
230 /* Note: SPRG4-7 are user-readable, so we don't get
231 * a trap. */
232
233 case SPRN_DEC:
234 spr_val = kvmppc_get_dec(vcpu, get_tb());
235 break;
236 default:
237 emulated = kvmppc_core_emulate_mfspr(vcpu, sprn,
238 &spr_val);
239 if (unlikely(emulated == EMULATE_FAIL)) {
240 printk(KERN_INFO "mfspr: unknown spr "
241 "0x%x\n", sprn);
242 }
243 break;
244 }
245
246 if (emulated == EMULATE_DONE)
247 kvmppc_set_gpr(vcpu, rt, spr_val);
248 kvmppc_set_exit_type(vcpu, EMULATED_MFSPR_EXITS);
249
250 return emulated;
251}
252
134/* XXX to do: 253/* XXX to do:
135 * lhax 254 * lhax
136 * lhaux 255 * lhaux
@@ -156,7 +275,6 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
156 int sprn = get_sprn(inst); 275 int sprn = get_sprn(inst);
157 enum emulation_result emulated = EMULATE_DONE; 276 enum emulation_result emulated = EMULATE_DONE;
158 int advance = 1; 277 int advance = 1;
159 ulong spr_val = 0;
160 278
161 /* this default type might be overwritten by subcategories */ 279 /* this default type might be overwritten by subcategories */
162 kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS); 280 kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS);
@@ -236,62 +354,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
236 break; 354 break;
237 355
238 case OP_31_XOP_MFSPR: 356 case OP_31_XOP_MFSPR:
239 switch (sprn) { 357 emulated = kvmppc_emulate_mfspr(vcpu, sprn, rt);
240 case SPRN_SRR0:
241 spr_val = vcpu->arch.shared->srr0;
242 break;
243 case SPRN_SRR1:
244 spr_val = vcpu->arch.shared->srr1;
245 break;
246 case SPRN_PVR:
247 spr_val = vcpu->arch.pvr;
248 break;
249 case SPRN_PIR:
250 spr_val = vcpu->vcpu_id;
251 break;
252 case SPRN_MSSSR0:
253 spr_val = 0;
254 break;
255
256 /* Note: mftb and TBRL/TBWL are user-accessible, so
257 * the guest can always access the real TB anyways.
258 * In fact, we probably will never see these traps. */
259 case SPRN_TBWL:
260 spr_val = get_tb() >> 32;
261 break;
262 case SPRN_TBWU:
263 spr_val = get_tb();
264 break;
265
266 case SPRN_SPRG0:
267 spr_val = vcpu->arch.shared->sprg0;
268 break;
269 case SPRN_SPRG1:
270 spr_val = vcpu->arch.shared->sprg1;
271 break;
272 case SPRN_SPRG2:
273 spr_val = vcpu->arch.shared->sprg2;
274 break;
275 case SPRN_SPRG3:
276 spr_val = vcpu->arch.shared->sprg3;
277 break;
278 /* Note: SPRG4-7 are user-readable, so we don't get
279 * a trap. */
280
281 case SPRN_DEC:
282 spr_val = kvmppc_get_dec(vcpu, get_tb());
283 break;
284 default:
285 emulated = kvmppc_core_emulate_mfspr(vcpu, sprn,
286 &spr_val);
287 if (unlikely(emulated == EMULATE_FAIL)) {
288 printk(KERN_INFO "mfspr: unknown spr "
289 "0x%x\n", sprn);
290 }
291 break;
292 }
293 kvmppc_set_gpr(vcpu, rt, spr_val);
294 kvmppc_set_exit_type(vcpu, EMULATED_MFSPR_EXITS);
295 break; 358 break;
296 359
297 case OP_31_XOP_STHX: 360 case OP_31_XOP_STHX:
@@ -308,49 +371,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
308 break; 371 break;
309 372
310 case OP_31_XOP_MTSPR: 373 case OP_31_XOP_MTSPR:
311 spr_val = kvmppc_get_gpr(vcpu, rs); 374 emulated = kvmppc_emulate_mtspr(vcpu, sprn, rs);
312 switch (sprn) {
313 case SPRN_SRR0:
314 vcpu->arch.shared->srr0 = spr_val;
315 break;
316 case SPRN_SRR1:
317 vcpu->arch.shared->srr1 = spr_val;
318 break;
319
320 /* XXX We need to context-switch the timebase for
321 * watchdog and FIT. */
322 case SPRN_TBWL: break;
323 case SPRN_TBWU: break;
324
325 case SPRN_MSSSR0: break;
326
327 case SPRN_DEC:
328 vcpu->arch.dec = spr_val;
329 kvmppc_emulate_dec(vcpu);
330 break;
331
332 case SPRN_SPRG0:
333 vcpu->arch.shared->sprg0 = spr_val;
334 break;
335 case SPRN_SPRG1:
336 vcpu->arch.shared->sprg1 = spr_val;
337 break;
338 case SPRN_SPRG2:
339 vcpu->arch.shared->sprg2 = spr_val;
340 break;
341 case SPRN_SPRG3:
342 vcpu->arch.shared->sprg3 = spr_val;
343 break;
344
345 default:
346 emulated = kvmppc_core_emulate_mtspr(vcpu, sprn,
347 spr_val);
348 if (emulated == EMULATE_FAIL)
349 printk(KERN_INFO "mtspr: unknown spr "
350 "0x%x\n", sprn);
351 break;
352 }
353 kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS);
354 break; 375 break;
355 376
356 case OP_31_XOP_DCBI: 377 case OP_31_XOP_DCBI:
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 19:48:00 -0500