Commit | Line | Data |
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de56a948 PM |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License, version 2, as | |
4 | * published by the Free Software Foundation. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, | |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | * | |
11 | * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> | |
12 | * | |
13 | * Derived from book3s_rmhandlers.S and other files, which are: | |
14 | * | |
15 | * Copyright SUSE Linux Products GmbH 2009 | |
16 | * | |
17 | * Authors: Alexander Graf <agraf@suse.de> | |
18 | */ | |
19 | ||
20 | #include <asm/ppc_asm.h> | |
21 | #include <asm/kvm_asm.h> | |
22 | #include <asm/reg.h> | |
177339d7 | 23 | #include <asm/mmu.h> |
de56a948 | 24 | #include <asm/page.h> |
177339d7 PM |
25 | #include <asm/ptrace.h> |
26 | #include <asm/hvcall.h> | |
de56a948 PM |
27 | #include <asm/asm-offsets.h> |
28 | #include <asm/exception-64s.h> | |
f0888f70 | 29 | #include <asm/kvm_book3s_asm.h> |
b4072df4 | 30 | #include <asm/mmu-hash64.h> |
e4e38121 MN |
31 | #include <asm/tm.h> |
32 | ||
33 | #define VCPU_GPRS_TM(reg) (((reg) * ULONG_SIZE) + VCPU_GPR_TM) | |
de56a948 | 34 | |
e0b7ec05 PM |
35 | /* Values in HSTATE_NAPPING(r13) */ |
36 | #define NAPPING_CEDE 1 | |
37 | #define NAPPING_NOVCPU 2 | |
38 | ||
de56a948 | 39 | /* |
19ccb76a | 40 | * Call kvmppc_hv_entry in real mode. |
de56a948 PM |
41 | * Must be called with interrupts hard-disabled. |
42 | * | |
43 | * Input Registers: | |
44 | * | |
45 | * LR = return address to continue at after eventually re-enabling MMU | |
46 | */ | |
6ed179b6 | 47 | _GLOBAL_TOC(kvmppc_hv_entry_trampoline) |
218309b7 PM |
48 | mflr r0 |
49 | std r0, PPC_LR_STKOFF(r1) | |
50 | stdu r1, -112(r1) | |
de56a948 | 51 | mfmsr r10 |
218309b7 | 52 | LOAD_REG_ADDR(r5, kvmppc_call_hv_entry) |
de56a948 PM |
53 | li r0,MSR_RI |
54 | andc r0,r10,r0 | |
55 | li r6,MSR_IR | MSR_DR | |
56 | andc r6,r10,r6 | |
57 | mtmsrd r0,1 /* clear RI in MSR */ | |
58 | mtsrr0 r5 | |
59 | mtsrr1 r6 | |
60 | RFI | |
61 | ||
218309b7 | 62 | kvmppc_call_hv_entry: |
e0b7ec05 | 63 | ld r4, HSTATE_KVM_VCPU(r13) |
218309b7 PM |
64 | bl kvmppc_hv_entry |
65 | ||
66 | /* Back from guest - restore host state and return to caller */ | |
67 | ||
eee7ff9d | 68 | BEGIN_FTR_SECTION |
218309b7 PM |
69 | /* Restore host DABR and DABRX */ |
70 | ld r5,HSTATE_DABR(r13) | |
71 | li r6,7 | |
72 | mtspr SPRN_DABR,r5 | |
73 | mtspr SPRN_DABRX,r6 | |
eee7ff9d | 74 | END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) |
218309b7 PM |
75 | |
76 | /* Restore SPRG3 */ | |
9d378dfa SW |
77 | ld r3,PACA_SPRG_VDSO(r13) |
78 | mtspr SPRN_SPRG_VDSO_WRITE,r3 | |
218309b7 | 79 | |
218309b7 PM |
80 | /* Reload the host's PMU registers */ |
81 | ld r3, PACALPPACAPTR(r13) /* is the host using the PMU? */ | |
82 | lbz r4, LPPACA_PMCINUSE(r3) | |
83 | cmpwi r4, 0 | |
84 | beq 23f /* skip if not */ | |
9bc01a9b | 85 | BEGIN_FTR_SECTION |
9a4fc4ea | 86 | ld r3, HSTATE_MMCR0(r13) |
9bc01a9b PM |
87 | andi. r4, r3, MMCR0_PMAO_SYNC | MMCR0_PMAO |
88 | cmpwi r4, MMCR0_PMAO | |
89 | beql kvmppc_fix_pmao | |
90 | END_FTR_SECTION_IFSET(CPU_FTR_PMAO_BUG) | |
9a4fc4ea ME |
91 | lwz r3, HSTATE_PMC1(r13) |
92 | lwz r4, HSTATE_PMC2(r13) | |
93 | lwz r5, HSTATE_PMC3(r13) | |
94 | lwz r6, HSTATE_PMC4(r13) | |
95 | lwz r8, HSTATE_PMC5(r13) | |
96 | lwz r9, HSTATE_PMC6(r13) | |
218309b7 PM |
97 | mtspr SPRN_PMC1, r3 |
98 | mtspr SPRN_PMC2, r4 | |
99 | mtspr SPRN_PMC3, r5 | |
100 | mtspr SPRN_PMC4, r6 | |
101 | mtspr SPRN_PMC5, r8 | |
102 | mtspr SPRN_PMC6, r9 | |
9a4fc4ea ME |
103 | ld r3, HSTATE_MMCR0(r13) |
104 | ld r4, HSTATE_MMCR1(r13) | |
105 | ld r5, HSTATE_MMCRA(r13) | |
106 | ld r6, HSTATE_SIAR(r13) | |
107 | ld r7, HSTATE_SDAR(r13) | |
218309b7 PM |
108 | mtspr SPRN_MMCR1, r4 |
109 | mtspr SPRN_MMCRA, r5 | |
72cde5a8 PM |
110 | mtspr SPRN_SIAR, r6 |
111 | mtspr SPRN_SDAR, r7 | |
112 | BEGIN_FTR_SECTION | |
9a4fc4ea ME |
113 | ld r8, HSTATE_MMCR2(r13) |
114 | ld r9, HSTATE_SIER(r13) | |
72cde5a8 PM |
115 | mtspr SPRN_MMCR2, r8 |
116 | mtspr SPRN_SIER, r9 | |
117 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
218309b7 PM |
118 | mtspr SPRN_MMCR0, r3 |
119 | isync | |
120 | 23: | |
121 | ||
e0b7ec05 PM |
122 | /* |
123 | * Reload DEC. HDEC interrupts were disabled when | |
124 | * we reloaded the host's LPCR value. | |
125 | */ | |
126 | ld r3, HSTATE_DECEXP(r13) | |
127 | mftb r4 | |
128 | subf r4, r4, r3 | |
129 | mtspr SPRN_DEC, r4 | |
130 | ||
218309b7 PM |
131 | /* |
132 | * For external and machine check interrupts, we need | |
133 | * to call the Linux handler to process the interrupt. | |
134 | * We do that by jumping to absolute address 0x500 for | |
135 | * external interrupts, or the machine_check_fwnmi label | |
136 | * for machine checks (since firmware might have patched | |
137 | * the vector area at 0x200). The [h]rfid at the end of the | |
138 | * handler will return to the book3s_hv_interrupts.S code. | |
139 | * For other interrupts we do the rfid to get back | |
140 | * to the book3s_hv_interrupts.S code here. | |
141 | */ | |
142 | ld r8, 112+PPC_LR_STKOFF(r1) | |
143 | addi r1, r1, 112 | |
144 | ld r7, HSTATE_HOST_MSR(r13) | |
145 | ||
146 | cmpwi cr1, r12, BOOK3S_INTERRUPT_MACHINE_CHECK | |
147 | cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL | |
218309b7 | 148 | beq 11f |
0869b6fd MS |
149 | cmpwi cr2, r12, BOOK3S_INTERRUPT_HMI |
150 | beq cr2, 14f /* HMI check */ | |
218309b7 PM |
151 | |
152 | /* RFI into the highmem handler, or branch to interrupt handler */ | |
153 | mfmsr r6 | |
154 | li r0, MSR_RI | |
155 | andc r6, r6, r0 | |
156 | mtmsrd r6, 1 /* Clear RI in MSR */ | |
157 | mtsrr0 r8 | |
158 | mtsrr1 r7 | |
218309b7 PM |
159 | beq cr1, 13f /* machine check */ |
160 | RFI | |
161 | ||
162 | /* On POWER7, we have external interrupts set to use HSRR0/1 */ | |
163 | 11: mtspr SPRN_HSRR0, r8 | |
164 | mtspr SPRN_HSRR1, r7 | |
165 | ba 0x500 | |
166 | ||
167 | 13: b machine_check_fwnmi | |
168 | ||
0869b6fd MS |
169 | 14: mtspr SPRN_HSRR0, r8 |
170 | mtspr SPRN_HSRR1, r7 | |
171 | b hmi_exception_after_realmode | |
172 | ||
e0b7ec05 PM |
173 | kvmppc_primary_no_guest: |
174 | /* We handle this much like a ceded vcpu */ | |
fd6d53b1 PM |
175 | /* put the HDEC into the DEC, since HDEC interrupts don't wake us */ |
176 | mfspr r3, SPRN_HDEC | |
177 | mtspr SPRN_DEC, r3 | |
6af27c84 PM |
178 | /* |
179 | * Make sure the primary has finished the MMU switch. | |
180 | * We should never get here on a secondary thread, but | |
181 | * check it for robustness' sake. | |
182 | */ | |
183 | ld r5, HSTATE_KVM_VCORE(r13) | |
184 | 65: lbz r0, VCORE_IN_GUEST(r5) | |
185 | cmpwi r0, 0 | |
186 | beq 65b | |
187 | /* Set LPCR. */ | |
188 | ld r8,VCORE_LPCR(r5) | |
189 | mtspr SPRN_LPCR,r8 | |
190 | isync | |
e0b7ec05 PM |
191 | /* set our bit in napping_threads */ |
192 | ld r5, HSTATE_KVM_VCORE(r13) | |
193 | lbz r7, HSTATE_PTID(r13) | |
194 | li r0, 1 | |
195 | sld r0, r0, r7 | |
196 | addi r6, r5, VCORE_NAPPING_THREADS | |
197 | 1: lwarx r3, 0, r6 | |
198 | or r3, r3, r0 | |
199 | stwcx. r3, 0, r6 | |
200 | bne 1b | |
7d6c40da | 201 | /* order napping_threads update vs testing entry_exit_map */ |
e0b7ec05 PM |
202 | isync |
203 | li r12, 0 | |
204 | lwz r7, VCORE_ENTRY_EXIT(r5) | |
205 | cmpwi r7, 0x100 | |
206 | bge kvm_novcpu_exit /* another thread already exiting */ | |
207 | li r3, NAPPING_NOVCPU | |
208 | stb r3, HSTATE_NAPPING(r13) | |
e0b7ec05 | 209 | |
ccc07772 | 210 | li r3, 0 /* Don't wake on privileged (OS) doorbell */ |
e0b7ec05 PM |
211 | b kvm_do_nap |
212 | ||
213 | kvm_novcpu_wakeup: | |
214 | ld r1, HSTATE_HOST_R1(r13) | |
215 | ld r5, HSTATE_KVM_VCORE(r13) | |
216 | li r0, 0 | |
217 | stb r0, HSTATE_NAPPING(r13) | |
218 | stb r0, HSTATE_HWTHREAD_REQ(r13) | |
219 | ||
e3bbbbfa PM |
220 | /* check the wake reason */ |
221 | bl kvmppc_check_wake_reason | |
6af27c84 | 222 | |
e0b7ec05 | 223 | /* see if any other thread is already exiting */ |
e0b7ec05 PM |
224 | lwz r0, VCORE_ENTRY_EXIT(r5) |
225 | cmpwi r0, 0x100 | |
226 | bge kvm_novcpu_exit | |
227 | ||
228 | /* clear our bit in napping_threads */ | |
229 | lbz r7, HSTATE_PTID(r13) | |
230 | li r0, 1 | |
231 | sld r0, r0, r7 | |
232 | addi r6, r5, VCORE_NAPPING_THREADS | |
e3bbbbfa PM |
233 | 4: lwarx r7, 0, r6 |
234 | andc r7, r7, r0 | |
235 | stwcx. r7, 0, r6 | |
e0b7ec05 PM |
236 | bne 4b |
237 | ||
e3bbbbfa | 238 | /* See if the wake reason means we need to exit */ |
e0b7ec05 PM |
239 | cmpdi r3, 0 |
240 | bge kvm_novcpu_exit | |
e0b7ec05 | 241 | |
fd6d53b1 PM |
242 | /* See if our timeslice has expired (HDEC is negative) */ |
243 | mfspr r0, SPRN_HDEC | |
244 | li r12, BOOK3S_INTERRUPT_HV_DECREMENTER | |
245 | cmpwi r0, 0 | |
246 | blt kvm_novcpu_exit | |
247 | ||
e0b7ec05 PM |
248 | /* Got an IPI but other vcpus aren't yet exiting, must be a latecomer */ |
249 | ld r4, HSTATE_KVM_VCPU(r13) | |
250 | cmpdi r4, 0 | |
b6c295df PM |
251 | beq kvmppc_primary_no_guest |
252 | ||
253 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING | |
254 | addi r3, r4, VCPU_TB_RMENTRY | |
255 | bl kvmhv_start_timing | |
256 | #endif | |
257 | b kvmppc_got_guest | |
e0b7ec05 PM |
258 | |
259 | kvm_novcpu_exit: | |
6af27c84 PM |
260 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
261 | ld r4, HSTATE_KVM_VCPU(r13) | |
262 | cmpdi r4, 0 | |
263 | beq 13f | |
264 | addi r3, r4, VCPU_TB_RMEXIT | |
265 | bl kvmhv_accumulate_time | |
266 | #endif | |
eddb60fb PM |
267 | 13: mr r3, r12 |
268 | stw r12, 112-4(r1) | |
269 | bl kvmhv_commence_exit | |
270 | nop | |
271 | lwz r12, 112-4(r1) | |
6af27c84 | 272 | b kvmhv_switch_to_host |
e0b7ec05 | 273 | |
371fefd6 | 274 | /* |
e0b7ec05 | 275 | * We come in here when wakened from nap mode. |
371fefd6 PM |
276 | * Relocation is off and most register values are lost. |
277 | * r13 points to the PACA. | |
278 | */ | |
279 | .globl kvm_start_guest | |
280 | kvm_start_guest: | |
fd17dc7b PM |
281 | |
282 | /* Set runlatch bit the minute you wake up from nap */ | |
1f09c3ed PM |
283 | mfspr r0, SPRN_CTRLF |
284 | ori r0, r0, 1 | |
285 | mtspr SPRN_CTRLT, r0 | |
fd17dc7b | 286 | |
19ccb76a PM |
287 | ld r2,PACATOC(r13) |
288 | ||
f0888f70 PM |
289 | li r0,KVM_HWTHREAD_IN_KVM |
290 | stb r0,HSTATE_HWTHREAD_STATE(r13) | |
371fefd6 | 291 | |
f0888f70 PM |
292 | /* NV GPR values from power7_idle() will no longer be valid */ |
293 | li r0,1 | |
294 | stb r0,PACA_NAPSTATELOST(r13) | |
371fefd6 | 295 | |
4619ac88 PM |
296 | /* were we napping due to cede? */ |
297 | lbz r0,HSTATE_NAPPING(r13) | |
e0b7ec05 PM |
298 | cmpwi r0,NAPPING_CEDE |
299 | beq kvm_end_cede | |
300 | cmpwi r0,NAPPING_NOVCPU | |
301 | beq kvm_novcpu_wakeup | |
302 | ||
303 | ld r1,PACAEMERGSP(r13) | |
304 | subi r1,r1,STACK_FRAME_OVERHEAD | |
4619ac88 PM |
305 | |
306 | /* | |
307 | * We weren't napping due to cede, so this must be a secondary | |
308 | * thread being woken up to run a guest, or being woken up due | |
309 | * to a stray IPI. (Or due to some machine check or hypervisor | |
310 | * maintenance interrupt while the core is in KVM.) | |
311 | */ | |
f0888f70 PM |
312 | |
313 | /* Check the wake reason in SRR1 to see why we got here */ | |
e3bbbbfa PM |
314 | bl kvmppc_check_wake_reason |
315 | cmpdi r3, 0 | |
316 | bge kvm_no_guest | |
371fefd6 | 317 | |
4619ac88 | 318 | /* get vcpu pointer, NULL if we have no vcpu to run */ |
7b444c67 PM |
319 | ld r4,HSTATE_KVM_VCPU(r13) |
320 | cmpdi r4,0 | |
f0888f70 | 321 | /* if we have no vcpu to run, go back to sleep */ |
7b444c67 | 322 | beq kvm_no_guest |
f0888f70 | 323 | |
56548fc0 PM |
324 | kvm_secondary_got_guest: |
325 | ||
e0b7ec05 | 326 | /* Set HSTATE_DSCR(r13) to something sensible */ |
1739ea9e | 327 | ld r6, PACA_DSCR(r13) |
e0b7ec05 | 328 | std r6, HSTATE_DSCR(r13) |
2fde6d20 | 329 | |
5d5b99cd PM |
330 | /* Order load of vcore, ptid etc. after load of vcpu */ |
331 | lwsync | |
e0b7ec05 | 332 | bl kvmppc_hv_entry |
218309b7 PM |
333 | |
334 | /* Back from the guest, go back to nap */ | |
335 | /* Clear our vcpu pointer so we don't come back in early */ | |
336 | li r0, 0 | |
f019b7ad | 337 | /* |
5d5b99cd PM |
338 | * Once we clear HSTATE_KVM_VCPU(r13), the code in |
339 | * kvmppc_run_core() is going to assume that all our vcpu | |
340 | * state is visible in memory. This lwsync makes sure | |
341 | * that that is true. | |
f019b7ad | 342 | */ |
218309b7 | 343 | lwsync |
5d5b99cd | 344 | std r0, HSTATE_KVM_VCPU(r13) |
218309b7 | 345 | |
56548fc0 PM |
346 | /* |
347 | * At this point we have finished executing in the guest. | |
348 | * We need to wait for hwthread_req to become zero, since | |
349 | * we may not turn on the MMU while hwthread_req is non-zero. | |
350 | * While waiting we also need to check if we get given a vcpu to run. | |
351 | */ | |
218309b7 | 352 | kvm_no_guest: |
56548fc0 PM |
353 | lbz r3, HSTATE_HWTHREAD_REQ(r13) |
354 | cmpwi r3, 0 | |
355 | bne 53f | |
356 | HMT_MEDIUM | |
357 | li r0, KVM_HWTHREAD_IN_KERNEL | |
218309b7 | 358 | stb r0, HSTATE_HWTHREAD_STATE(r13) |
56548fc0 PM |
359 | /* need to recheck hwthread_req after a barrier, to avoid race */ |
360 | sync | |
361 | lbz r3, HSTATE_HWTHREAD_REQ(r13) | |
362 | cmpwi r3, 0 | |
363 | bne 54f | |
364 | /* | |
365 | * We jump to power7_wakeup_loss, which will return to the caller | |
366 | * of power7_nap in the powernv cpu offline loop. The value we | |
367 | * put in r3 becomes the return value for power7_nap. | |
368 | */ | |
218309b7 PM |
369 | li r3, LPCR_PECE0 |
370 | mfspr r4, SPRN_LPCR | |
371 | rlwimi r4, r3, 0, LPCR_PECE0 | LPCR_PECE1 | |
372 | mtspr SPRN_LPCR, r4 | |
56548fc0 PM |
373 | li r3, 0 |
374 | b power7_wakeup_loss | |
375 | ||
376 | 53: HMT_LOW | |
377 | ld r4, HSTATE_KVM_VCPU(r13) | |
378 | cmpdi r4, 0 | |
379 | beq kvm_no_guest | |
380 | HMT_MEDIUM | |
381 | b kvm_secondary_got_guest | |
382 | ||
383 | 54: li r0, KVM_HWTHREAD_IN_KVM | |
384 | stb r0, HSTATE_HWTHREAD_STATE(r13) | |
385 | b kvm_no_guest | |
218309b7 PM |
386 | |
387 | /****************************************************************************** | |
388 | * * | |
389 | * Entry code * | |
390 | * * | |
391 | *****************************************************************************/ | |
392 | ||
de56a948 PM |
393 | .global kvmppc_hv_entry |
394 | kvmppc_hv_entry: | |
395 | ||
396 | /* Required state: | |
397 | * | |
e0b7ec05 | 398 | * R4 = vcpu pointer (or NULL) |
de56a948 PM |
399 | * MSR = ~IR|DR |
400 | * R13 = PACA | |
401 | * R1 = host R1 | |
06a29e42 | 402 | * R2 = TOC |
de56a948 PM |
403 | * all other volatile GPRS = free |
404 | */ | |
405 | mflr r0 | |
218309b7 PM |
406 | std r0, PPC_LR_STKOFF(r1) |
407 | stdu r1, -112(r1) | |
de56a948 | 408 | |
de56a948 PM |
409 | /* Save R1 in the PACA */ |
410 | std r1, HSTATE_HOST_R1(r13) | |
411 | ||
44a3add8 PM |
412 | li r6, KVM_GUEST_MODE_HOST_HV |
413 | stb r6, HSTATE_IN_GUEST(r13) | |
414 | ||
b6c295df PM |
415 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
416 | /* Store initial timestamp */ | |
417 | cmpdi r4, 0 | |
418 | beq 1f | |
419 | addi r3, r4, VCPU_TB_RMENTRY | |
420 | bl kvmhv_start_timing | |
421 | 1: | |
422 | #endif | |
de56a948 PM |
423 | /* Clear out SLB */ |
424 | li r6,0 | |
425 | slbmte r6,r6 | |
426 | slbia | |
427 | ptesync | |
428 | ||
9e368f29 | 429 | /* |
c17b98cf | 430 | * POWER7/POWER8 host -> guest partition switch code. |
9e368f29 PM |
431 | * We don't have to lock against concurrent tlbies, |
432 | * but we do have to coordinate across hardware threads. | |
433 | */ | |
7d6c40da PM |
434 | /* Set bit in entry map iff exit map is zero. */ |
435 | ld r5, HSTATE_KVM_VCORE(r13) | |
436 | li r7, 1 | |
437 | lbz r6, HSTATE_PTID(r13) | |
438 | sld r7, r7, r6 | |
439 | addi r9, r5, VCORE_ENTRY_EXIT | |
440 | 21: lwarx r3, 0, r9 | |
441 | cmpwi r3, 0x100 /* any threads starting to exit? */ | |
371fefd6 | 442 | bge secondary_too_late /* if so we're too late to the party */ |
7d6c40da PM |
443 | or r3, r3, r7 |
444 | stwcx. r3, 0, r9 | |
371fefd6 PM |
445 | bne 21b |
446 | ||
447 | /* Primary thread switches to guest partition. */ | |
e0b7ec05 | 448 | ld r9,VCORE_KVM(r5) /* pointer to struct kvm */ |
371fefd6 | 449 | cmpwi r6,0 |
6af27c84 | 450 | bne 10f |
de56a948 PM |
451 | ld r6,KVM_SDR1(r9) |
452 | lwz r7,KVM_LPID(r9) | |
453 | li r0,LPID_RSVD /* switch to reserved LPID */ | |
454 | mtspr SPRN_LPID,r0 | |
455 | ptesync | |
456 | mtspr SPRN_SDR1,r6 /* switch to partition page table */ | |
457 | mtspr SPRN_LPID,r7 | |
458 | isync | |
1b400ba0 PM |
459 | |
460 | /* See if we need to flush the TLB */ | |
461 | lhz r6,PACAPACAINDEX(r13) /* test_bit(cpu, need_tlb_flush) */ | |
462 | clrldi r7,r6,64-6 /* extract bit number (6 bits) */ | |
463 | srdi r6,r6,6 /* doubleword number */ | |
464 | sldi r6,r6,3 /* address offset */ | |
465 | add r6,r6,r9 | |
466 | addi r6,r6,KVM_NEED_FLUSH /* dword in kvm->arch.need_tlb_flush */ | |
371fefd6 | 467 | li r0,1 |
1b400ba0 PM |
468 | sld r0,r0,r7 |
469 | ld r7,0(r6) | |
470 | and. r7,r7,r0 | |
471 | beq 22f | |
472 | 23: ldarx r7,0,r6 /* if set, clear the bit */ | |
473 | andc r7,r7,r0 | |
474 | stdcx. r7,0,r6 | |
475 | bne 23b | |
ca252055 PM |
476 | /* Flush the TLB of any entries for this LPID */ |
477 | /* use arch 2.07S as a proxy for POWER8 */ | |
478 | BEGIN_FTR_SECTION | |
479 | li r6,512 /* POWER8 has 512 sets */ | |
480 | FTR_SECTION_ELSE | |
481 | li r6,128 /* POWER7 has 128 sets */ | |
482 | ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_207S) | |
1b400ba0 PM |
483 | mtctr r6 |
484 | li r7,0x800 /* IS field = 0b10 */ | |
485 | ptesync | |
486 | 28: tlbiel r7 | |
487 | addi r7,r7,0x1000 | |
488 | bdnz 28b | |
489 | ptesync | |
490 | ||
93b0f4dc PM |
491 | /* Add timebase offset onto timebase */ |
492 | 22: ld r8,VCORE_TB_OFFSET(r5) | |
493 | cmpdi r8,0 | |
494 | beq 37f | |
495 | mftb r6 /* current host timebase */ | |
496 | add r8,r8,r6 | |
497 | mtspr SPRN_TBU40,r8 /* update upper 40 bits */ | |
498 | mftb r7 /* check if lower 24 bits overflowed */ | |
499 | clrldi r6,r6,40 | |
500 | clrldi r7,r7,40 | |
501 | cmpld r7,r6 | |
502 | bge 37f | |
503 | addis r8,r8,0x100 /* if so, increment upper 40 bits */ | |
504 | mtspr SPRN_TBU40,r8 | |
505 | ||
388cc6e1 PM |
506 | /* Load guest PCR value to select appropriate compat mode */ |
507 | 37: ld r7, VCORE_PCR(r5) | |
508 | cmpdi r7, 0 | |
509 | beq 38f | |
510 | mtspr SPRN_PCR, r7 | |
511 | 38: | |
b005255e MN |
512 | |
513 | BEGIN_FTR_SECTION | |
514 | /* DPDES is shared between threads */ | |
515 | ld r8, VCORE_DPDES(r5) | |
516 | mtspr SPRN_DPDES, r8 | |
517 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
518 | ||
388cc6e1 | 519 | li r0,1 |
371fefd6 | 520 | stb r0,VCORE_IN_GUEST(r5) /* signal secondaries to continue */ |
9e368f29 | 521 | |
e0b7ec05 | 522 | /* Do we have a guest vcpu to run? */ |
6af27c84 | 523 | 10: cmpdi r4, 0 |
e0b7ec05 PM |
524 | beq kvmppc_primary_no_guest |
525 | kvmppc_got_guest: | |
de56a948 PM |
526 | |
527 | /* Load up guest SLB entries */ | |
e0b7ec05 | 528 | lwz r5,VCPU_SLB_MAX(r4) |
de56a948 PM |
529 | cmpwi r5,0 |
530 | beq 9f | |
531 | mtctr r5 | |
532 | addi r6,r4,VCPU_SLB | |
533 | 1: ld r8,VCPU_SLB_E(r6) | |
534 | ld r9,VCPU_SLB_V(r6) | |
535 | slbmte r9,r8 | |
536 | addi r6,r6,VCPU_SLB_SIZE | |
537 | bdnz 1b | |
538 | 9: | |
e0b7ec05 PM |
539 | /* Increment yield count if they have a VPA */ |
540 | ld r3, VCPU_VPA(r4) | |
541 | cmpdi r3, 0 | |
542 | beq 25f | |
0865a583 AG |
543 | li r6, LPPACA_YIELDCOUNT |
544 | LWZX_BE r5, r3, r6 | |
e0b7ec05 | 545 | addi r5, r5, 1 |
0865a583 | 546 | STWX_BE r5, r3, r6 |
e0b7ec05 PM |
547 | li r6, 1 |
548 | stb r6, VCPU_VPA_DIRTY(r4) | |
549 | 25: | |
550 | ||
e0b7ec05 PM |
551 | /* Save purr/spurr */ |
552 | mfspr r5,SPRN_PURR | |
553 | mfspr r6,SPRN_SPURR | |
554 | std r5,HSTATE_PURR(r13) | |
555 | std r6,HSTATE_SPURR(r13) | |
556 | ld r7,VCPU_PURR(r4) | |
557 | ld r8,VCPU_SPURR(r4) | |
558 | mtspr SPRN_PURR,r7 | |
559 | mtspr SPRN_SPURR,r8 | |
e0b7ec05 PM |
560 | |
561 | BEGIN_FTR_SECTION | |
562 | /* Set partition DABR */ | |
563 | /* Do this before re-enabling PMU to avoid P7 DABR corruption bug */ | |
8563bf52 | 564 | lwz r5,VCPU_DABRX(r4) |
e0b7ec05 PM |
565 | ld r6,VCPU_DABR(r4) |
566 | mtspr SPRN_DABRX,r5 | |
567 | mtspr SPRN_DABR,r6 | |
e0b7ec05 | 568 | isync |
e0b7ec05 PM |
569 | END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) |
570 | ||
e4e38121 MN |
571 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
572 | BEGIN_FTR_SECTION | |
573 | b skip_tm | |
574 | END_FTR_SECTION_IFCLR(CPU_FTR_TM) | |
575 | ||
576 | /* Turn on TM/FP/VSX/VMX so we can restore them. */ | |
577 | mfmsr r5 | |
578 | li r6, MSR_TM >> 32 | |
579 | sldi r6, r6, 32 | |
580 | or r5, r5, r6 | |
581 | ori r5, r5, MSR_FP | |
582 | oris r5, r5, (MSR_VEC | MSR_VSX)@h | |
583 | mtmsrd r5 | |
584 | ||
585 | /* | |
586 | * The user may change these outside of a transaction, so they must | |
587 | * always be context switched. | |
588 | */ | |
589 | ld r5, VCPU_TFHAR(r4) | |
590 | ld r6, VCPU_TFIAR(r4) | |
591 | ld r7, VCPU_TEXASR(r4) | |
592 | mtspr SPRN_TFHAR, r5 | |
593 | mtspr SPRN_TFIAR, r6 | |
594 | mtspr SPRN_TEXASR, r7 | |
595 | ||
596 | ld r5, VCPU_MSR(r4) | |
597 | rldicl. r5, r5, 64 - MSR_TS_S_LG, 62 | |
598 | beq skip_tm /* TM not active in guest */ | |
599 | ||
600 | /* Make sure the failure summary is set, otherwise we'll program check | |
601 | * when we trechkpt. It's possible that this might have been not set | |
602 | * on a kvmppc_set_one_reg() call but we shouldn't let this crash the | |
603 | * host. | |
604 | */ | |
605 | oris r7, r7, (TEXASR_FS)@h | |
606 | mtspr SPRN_TEXASR, r7 | |
607 | ||
608 | /* | |
609 | * We need to load up the checkpointed state for the guest. | |
610 | * We need to do this early as it will blow away any GPRs, VSRs and | |
611 | * some SPRs. | |
612 | */ | |
613 | ||
614 | mr r31, r4 | |
615 | addi r3, r31, VCPU_FPRS_TM | |
9bf163f8 | 616 | bl load_fp_state |
e4e38121 | 617 | addi r3, r31, VCPU_VRS_TM |
9bf163f8 | 618 | bl load_vr_state |
e4e38121 MN |
619 | mr r4, r31 |
620 | lwz r7, VCPU_VRSAVE_TM(r4) | |
621 | mtspr SPRN_VRSAVE, r7 | |
622 | ||
623 | ld r5, VCPU_LR_TM(r4) | |
624 | lwz r6, VCPU_CR_TM(r4) | |
625 | ld r7, VCPU_CTR_TM(r4) | |
626 | ld r8, VCPU_AMR_TM(r4) | |
627 | ld r9, VCPU_TAR_TM(r4) | |
628 | mtlr r5 | |
629 | mtcr r6 | |
630 | mtctr r7 | |
631 | mtspr SPRN_AMR, r8 | |
632 | mtspr SPRN_TAR, r9 | |
633 | ||
634 | /* | |
635 | * Load up PPR and DSCR values but don't put them in the actual SPRs | |
636 | * till the last moment to avoid running with userspace PPR and DSCR for | |
637 | * too long. | |
638 | */ | |
639 | ld r29, VCPU_DSCR_TM(r4) | |
640 | ld r30, VCPU_PPR_TM(r4) | |
641 | ||
642 | std r2, PACATMSCRATCH(r13) /* Save TOC */ | |
643 | ||
644 | /* Clear the MSR RI since r1, r13 are all going to be foobar. */ | |
645 | li r5, 0 | |
646 | mtmsrd r5, 1 | |
647 | ||
648 | /* Load GPRs r0-r28 */ | |
649 | reg = 0 | |
650 | .rept 29 | |
651 | ld reg, VCPU_GPRS_TM(reg)(r31) | |
652 | reg = reg + 1 | |
653 | .endr | |
654 | ||
655 | mtspr SPRN_DSCR, r29 | |
656 | mtspr SPRN_PPR, r30 | |
657 | ||
658 | /* Load final GPRs */ | |
659 | ld 29, VCPU_GPRS_TM(29)(r31) | |
660 | ld 30, VCPU_GPRS_TM(30)(r31) | |
661 | ld 31, VCPU_GPRS_TM(31)(r31) | |
662 | ||
663 | /* TM checkpointed state is now setup. All GPRs are now volatile. */ | |
664 | TRECHKPT | |
665 | ||
666 | /* Now let's get back the state we need. */ | |
667 | HMT_MEDIUM | |
668 | GET_PACA(r13) | |
669 | ld r29, HSTATE_DSCR(r13) | |
670 | mtspr SPRN_DSCR, r29 | |
671 | ld r4, HSTATE_KVM_VCPU(r13) | |
672 | ld r1, HSTATE_HOST_R1(r13) | |
673 | ld r2, PACATMSCRATCH(r13) | |
674 | ||
675 | /* Set the MSR RI since we have our registers back. */ | |
676 | li r5, MSR_RI | |
677 | mtmsrd r5, 1 | |
678 | skip_tm: | |
679 | #endif | |
680 | ||
e0b7ec05 PM |
681 | /* Load guest PMU registers */ |
682 | /* R4 is live here (vcpu pointer) */ | |
683 | li r3, 1 | |
684 | sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */ | |
685 | mtspr SPRN_MMCR0, r3 /* freeze all counters, disable ints */ | |
686 | isync | |
9bc01a9b PM |
687 | BEGIN_FTR_SECTION |
688 | ld r3, VCPU_MMCR(r4) | |
689 | andi. r5, r3, MMCR0_PMAO_SYNC | MMCR0_PMAO | |
690 | cmpwi r5, MMCR0_PMAO | |
691 | beql kvmppc_fix_pmao | |
692 | END_FTR_SECTION_IFSET(CPU_FTR_PMAO_BUG) | |
e0b7ec05 PM |
693 | lwz r3, VCPU_PMC(r4) /* always load up guest PMU registers */ |
694 | lwz r5, VCPU_PMC + 4(r4) /* to prevent information leak */ | |
695 | lwz r6, VCPU_PMC + 8(r4) | |
696 | lwz r7, VCPU_PMC + 12(r4) | |
697 | lwz r8, VCPU_PMC + 16(r4) | |
698 | lwz r9, VCPU_PMC + 20(r4) | |
e0b7ec05 PM |
699 | mtspr SPRN_PMC1, r3 |
700 | mtspr SPRN_PMC2, r5 | |
701 | mtspr SPRN_PMC3, r6 | |
702 | mtspr SPRN_PMC4, r7 | |
703 | mtspr SPRN_PMC5, r8 | |
704 | mtspr SPRN_PMC6, r9 | |
e0b7ec05 PM |
705 | ld r3, VCPU_MMCR(r4) |
706 | ld r5, VCPU_MMCR + 8(r4) | |
707 | ld r6, VCPU_MMCR + 16(r4) | |
708 | ld r7, VCPU_SIAR(r4) | |
709 | ld r8, VCPU_SDAR(r4) | |
710 | mtspr SPRN_MMCR1, r5 | |
711 | mtspr SPRN_MMCRA, r6 | |
712 | mtspr SPRN_SIAR, r7 | |
713 | mtspr SPRN_SDAR, r8 | |
b005255e MN |
714 | BEGIN_FTR_SECTION |
715 | ld r5, VCPU_MMCR + 24(r4) | |
716 | ld r6, VCPU_SIER(r4) | |
717 | lwz r7, VCPU_PMC + 24(r4) | |
718 | lwz r8, VCPU_PMC + 28(r4) | |
719 | ld r9, VCPU_MMCR + 32(r4) | |
720 | mtspr SPRN_MMCR2, r5 | |
721 | mtspr SPRN_SIER, r6 | |
722 | mtspr SPRN_SPMC1, r7 | |
723 | mtspr SPRN_SPMC2, r8 | |
724 | mtspr SPRN_MMCRS, r9 | |
725 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
e0b7ec05 PM |
726 | mtspr SPRN_MMCR0, r3 |
727 | isync | |
728 | ||
729 | /* Load up FP, VMX and VSX registers */ | |
730 | bl kvmppc_load_fp | |
731 | ||
732 | ld r14, VCPU_GPR(R14)(r4) | |
733 | ld r15, VCPU_GPR(R15)(r4) | |
734 | ld r16, VCPU_GPR(R16)(r4) | |
735 | ld r17, VCPU_GPR(R17)(r4) | |
736 | ld r18, VCPU_GPR(R18)(r4) | |
737 | ld r19, VCPU_GPR(R19)(r4) | |
738 | ld r20, VCPU_GPR(R20)(r4) | |
739 | ld r21, VCPU_GPR(R21)(r4) | |
740 | ld r22, VCPU_GPR(R22)(r4) | |
741 | ld r23, VCPU_GPR(R23)(r4) | |
742 | ld r24, VCPU_GPR(R24)(r4) | |
743 | ld r25, VCPU_GPR(R25)(r4) | |
744 | ld r26, VCPU_GPR(R26)(r4) | |
745 | ld r27, VCPU_GPR(R27)(r4) | |
746 | ld r28, VCPU_GPR(R28)(r4) | |
747 | ld r29, VCPU_GPR(R29)(r4) | |
748 | ld r30, VCPU_GPR(R30)(r4) | |
749 | ld r31, VCPU_GPR(R31)(r4) | |
750 | ||
e0b7ec05 PM |
751 | /* Switch DSCR to guest value */ |
752 | ld r5, VCPU_DSCR(r4) | |
753 | mtspr SPRN_DSCR, r5 | |
e0b7ec05 | 754 | |
b005255e | 755 | BEGIN_FTR_SECTION |
c17b98cf | 756 | /* Skip next section on POWER7 */ |
b005255e MN |
757 | b 8f |
758 | END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) | |
759 | /* Turn on TM so we can access TFHAR/TFIAR/TEXASR */ | |
760 | mfmsr r8 | |
761 | li r0, 1 | |
762 | rldimi r8, r0, MSR_TM_LG, 63-MSR_TM_LG | |
763 | mtmsrd r8 | |
764 | ||
765 | /* Load up POWER8-specific registers */ | |
766 | ld r5, VCPU_IAMR(r4) | |
767 | lwz r6, VCPU_PSPB(r4) | |
768 | ld r7, VCPU_FSCR(r4) | |
769 | mtspr SPRN_IAMR, r5 | |
770 | mtspr SPRN_PSPB, r6 | |
771 | mtspr SPRN_FSCR, r7 | |
772 | ld r5, VCPU_DAWR(r4) | |
773 | ld r6, VCPU_DAWRX(r4) | |
774 | ld r7, VCPU_CIABR(r4) | |
775 | ld r8, VCPU_TAR(r4) | |
776 | mtspr SPRN_DAWR, r5 | |
777 | mtspr SPRN_DAWRX, r6 | |
778 | mtspr SPRN_CIABR, r7 | |
779 | mtspr SPRN_TAR, r8 | |
780 | ld r5, VCPU_IC(r4) | |
781 | ld r6, VCPU_VTB(r4) | |
782 | mtspr SPRN_IC, r5 | |
783 | mtspr SPRN_VTB, r6 | |
7b490411 | 784 | ld r8, VCPU_EBBHR(r4) |
b005255e MN |
785 | mtspr SPRN_EBBHR, r8 |
786 | ld r5, VCPU_EBBRR(r4) | |
787 | ld r6, VCPU_BESCR(r4) | |
788 | ld r7, VCPU_CSIGR(r4) | |
789 | ld r8, VCPU_TACR(r4) | |
790 | mtspr SPRN_EBBRR, r5 | |
791 | mtspr SPRN_BESCR, r6 | |
792 | mtspr SPRN_CSIGR, r7 | |
793 | mtspr SPRN_TACR, r8 | |
794 | ld r5, VCPU_TCSCR(r4) | |
795 | ld r6, VCPU_ACOP(r4) | |
796 | lwz r7, VCPU_GUEST_PID(r4) | |
797 | ld r8, VCPU_WORT(r4) | |
798 | mtspr SPRN_TCSCR, r5 | |
799 | mtspr SPRN_ACOP, r6 | |
800 | mtspr SPRN_PID, r7 | |
801 | mtspr SPRN_WORT, r8 | |
802 | 8: | |
803 | ||
e0b7ec05 PM |
804 | /* |
805 | * Set the decrementer to the guest decrementer. | |
806 | */ | |
807 | ld r8,VCPU_DEC_EXPIRES(r4) | |
c5fb80d3 PM |
808 | /* r8 is a host timebase value here, convert to guest TB */ |
809 | ld r5,HSTATE_KVM_VCORE(r13) | |
810 | ld r6,VCORE_TB_OFFSET(r5) | |
811 | add r8,r8,r6 | |
e0b7ec05 PM |
812 | mftb r7 |
813 | subf r3,r7,r8 | |
814 | mtspr SPRN_DEC,r3 | |
815 | stw r3,VCPU_DEC(r4) | |
816 | ||
817 | ld r5, VCPU_SPRG0(r4) | |
818 | ld r6, VCPU_SPRG1(r4) | |
819 | ld r7, VCPU_SPRG2(r4) | |
820 | ld r8, VCPU_SPRG3(r4) | |
821 | mtspr SPRN_SPRG0, r5 | |
822 | mtspr SPRN_SPRG1, r6 | |
823 | mtspr SPRN_SPRG2, r7 | |
824 | mtspr SPRN_SPRG3, r8 | |
825 | ||
826 | /* Load up DAR and DSISR */ | |
827 | ld r5, VCPU_DAR(r4) | |
828 | lwz r6, VCPU_DSISR(r4) | |
829 | mtspr SPRN_DAR, r5 | |
830 | mtspr SPRN_DSISR, r6 | |
831 | ||
e0b7ec05 PM |
832 | /* Restore AMR and UAMOR, set AMOR to all 1s */ |
833 | ld r5,VCPU_AMR(r4) | |
834 | ld r6,VCPU_UAMOR(r4) | |
835 | li r7,-1 | |
836 | mtspr SPRN_AMR,r5 | |
837 | mtspr SPRN_UAMOR,r6 | |
838 | mtspr SPRN_AMOR,r7 | |
de56a948 PM |
839 | |
840 | /* Restore state of CTRL run bit; assume 1 on entry */ | |
841 | lwz r5,VCPU_CTRL(r4) | |
842 | andi. r5,r5,1 | |
843 | bne 4f | |
844 | mfspr r6,SPRN_CTRLF | |
845 | clrrdi r6,r6,1 | |
846 | mtspr SPRN_CTRLT,r6 | |
847 | 4: | |
6af27c84 PM |
848 | /* Secondary threads wait for primary to have done partition switch */ |
849 | ld r5, HSTATE_KVM_VCORE(r13) | |
850 | lbz r6, HSTATE_PTID(r13) | |
851 | cmpwi r6, 0 | |
852 | beq 21f | |
853 | lbz r0, VCORE_IN_GUEST(r5) | |
854 | cmpwi r0, 0 | |
855 | bne 21f | |
856 | HMT_LOW | |
857 | 20: lbz r0, VCORE_IN_GUEST(r5) | |
858 | cmpwi r0, 0 | |
859 | beq 20b | |
860 | HMT_MEDIUM | |
861 | 21: | |
862 | /* Set LPCR. */ | |
863 | ld r8,VCORE_LPCR(r5) | |
864 | mtspr SPRN_LPCR,r8 | |
865 | isync | |
866 | ||
867 | /* Check if HDEC expires soon */ | |
868 | mfspr r3, SPRN_HDEC | |
869 | cmpwi r3, 512 /* 1 microsecond */ | |
870 | blt hdec_soon | |
871 | ||
de56a948 PM |
872 | ld r6, VCPU_CTR(r4) |
873 | lwz r7, VCPU_XER(r4) | |
874 | ||
875 | mtctr r6 | |
876 | mtxer r7 | |
877 | ||
e3bbbbfa | 878 | kvmppc_cede_reentry: /* r4 = vcpu, r13 = paca */ |
4619ac88 PM |
879 | ld r10, VCPU_PC(r4) |
880 | ld r11, VCPU_MSR(r4) | |
de56a948 PM |
881 | ld r6, VCPU_SRR0(r4) |
882 | ld r7, VCPU_SRR1(r4) | |
e3bbbbfa PM |
883 | mtspr SPRN_SRR0, r6 |
884 | mtspr SPRN_SRR1, r7 | |
de56a948 | 885 | |
e3bbbbfa | 886 | deliver_guest_interrupt: |
4619ac88 | 887 | /* r11 = vcpu->arch.msr & ~MSR_HV */ |
de56a948 PM |
888 | rldicl r11, r11, 63 - MSR_HV_LG, 1 |
889 | rotldi r11, r11, 1 + MSR_HV_LG | |
890 | ori r11, r11, MSR_ME | |
891 | ||
19ccb76a | 892 | /* Check if we can deliver an external or decrementer interrupt now */ |
e3bbbbfa PM |
893 | ld r0, VCPU_PENDING_EXC(r4) |
894 | rldicl r0, r0, 64 - BOOK3S_IRQPRIO_EXTERNAL_LEVEL, 63 | |
895 | cmpdi cr1, r0, 0 | |
896 | andi. r8, r11, MSR_EE | |
e3bbbbfa PM |
897 | mfspr r8, SPRN_LPCR |
898 | /* Insert EXTERNAL_LEVEL bit into LPCR at the MER bit position */ | |
899 | rldimi r8, r0, LPCR_MER_SH, 63 - LPCR_MER_SH | |
900 | mtspr SPRN_LPCR, r8 | |
19ccb76a | 901 | isync |
19ccb76a | 902 | beq 5f |
e3bbbbfa PM |
903 | li r0, BOOK3S_INTERRUPT_EXTERNAL |
904 | bne cr1, 12f | |
905 | mfspr r0, SPRN_DEC | |
906 | cmpwi r0, 0 | |
907 | li r0, BOOK3S_INTERRUPT_DECREMENTER | |
908 | bge 5f | |
19ccb76a | 909 | |
e3bbbbfa | 910 | 12: mtspr SPRN_SRR0, r10 |
19ccb76a | 911 | mr r10,r0 |
e3bbbbfa | 912 | mtspr SPRN_SRR1, r11 |
e4e38121 MN |
913 | mr r9, r4 |
914 | bl kvmppc_msr_interrupt | |
e3bbbbfa | 915 | 5: |
19ccb76a | 916 | |
27025a60 LPF |
917 | /* |
918 | * Required state: | |
919 | * R4 = vcpu | |
920 | * R10: value for HSRR0 | |
921 | * R11: value for HSRR1 | |
922 | * R13 = PACA | |
923 | */ | |
de56a948 | 924 | fast_guest_return: |
4619ac88 PM |
925 | li r0,0 |
926 | stb r0,VCPU_CEDED(r4) /* cancel cede */ | |
de56a948 PM |
927 | mtspr SPRN_HSRR0,r10 |
928 | mtspr SPRN_HSRR1,r11 | |
929 | ||
930 | /* Activate guest mode, so faults get handled by KVM */ | |
44a3add8 | 931 | li r9, KVM_GUEST_MODE_GUEST_HV |
de56a948 PM |
932 | stb r9, HSTATE_IN_GUEST(r13) |
933 | ||
b6c295df PM |
934 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
935 | /* Accumulate timing */ | |
936 | addi r3, r4, VCPU_TB_GUEST | |
937 | bl kvmhv_accumulate_time | |
938 | #endif | |
939 | ||
de56a948 PM |
940 | /* Enter guest */ |
941 | ||
0acb9111 PM |
942 | BEGIN_FTR_SECTION |
943 | ld r5, VCPU_CFAR(r4) | |
944 | mtspr SPRN_CFAR, r5 | |
945 | END_FTR_SECTION_IFSET(CPU_FTR_CFAR) | |
4b8473c9 PM |
946 | BEGIN_FTR_SECTION |
947 | ld r0, VCPU_PPR(r4) | |
948 | END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) | |
0acb9111 | 949 | |
de56a948 PM |
950 | ld r5, VCPU_LR(r4) |
951 | lwz r6, VCPU_CR(r4) | |
952 | mtlr r5 | |
953 | mtcr r6 | |
954 | ||
c75df6f9 MN |
955 | ld r1, VCPU_GPR(R1)(r4) |
956 | ld r2, VCPU_GPR(R2)(r4) | |
957 | ld r3, VCPU_GPR(R3)(r4) | |
958 | ld r5, VCPU_GPR(R5)(r4) | |
959 | ld r6, VCPU_GPR(R6)(r4) | |
960 | ld r7, VCPU_GPR(R7)(r4) | |
961 | ld r8, VCPU_GPR(R8)(r4) | |
962 | ld r9, VCPU_GPR(R9)(r4) | |
963 | ld r10, VCPU_GPR(R10)(r4) | |
964 | ld r11, VCPU_GPR(R11)(r4) | |
965 | ld r12, VCPU_GPR(R12)(r4) | |
966 | ld r13, VCPU_GPR(R13)(r4) | |
967 | ||
4b8473c9 PM |
968 | BEGIN_FTR_SECTION |
969 | mtspr SPRN_PPR, r0 | |
970 | END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) | |
971 | ld r0, VCPU_GPR(R0)(r4) | |
c75df6f9 | 972 | ld r4, VCPU_GPR(R4)(r4) |
de56a948 PM |
973 | |
974 | hrfid | |
975 | b . | |
976 | ||
b6c295df | 977 | secondary_too_late: |
6af27c84 | 978 | li r12, 0 |
b6c295df PM |
979 | cmpdi r4, 0 |
980 | beq 11f | |
6af27c84 PM |
981 | stw r12, VCPU_TRAP(r4) |
982 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING | |
b6c295df PM |
983 | addi r3, r4, VCPU_TB_RMEXIT |
984 | bl kvmhv_accumulate_time | |
6af27c84 | 985 | #endif |
b6c295df PM |
986 | 11: b kvmhv_switch_to_host |
987 | ||
988 | hdec_soon: | |
6af27c84 PM |
989 | li r12, BOOK3S_INTERRUPT_HV_DECREMENTER |
990 | stw r12, VCPU_TRAP(r4) | |
991 | mr r9, r4 | |
992 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING | |
b6c295df PM |
993 | addi r3, r4, VCPU_TB_RMEXIT |
994 | bl kvmhv_accumulate_time | |
b6c295df | 995 | #endif |
6af27c84 | 996 | b guest_exit_cont |
b6c295df | 997 | |
de56a948 PM |
998 | /****************************************************************************** |
999 | * * | |
1000 | * Exit code * | |
1001 | * * | |
1002 | *****************************************************************************/ | |
1003 | ||
1004 | /* | |
1005 | * We come here from the first-level interrupt handlers. | |
1006 | */ | |
dd96b2c2 AK |
1007 | .globl kvmppc_interrupt_hv |
1008 | kvmppc_interrupt_hv: | |
de56a948 PM |
1009 | /* |
1010 | * Register contents: | |
1011 | * R12 = interrupt vector | |
1012 | * R13 = PACA | |
1013 | * guest CR, R12 saved in shadow VCPU SCRATCH1/0 | |
1014 | * guest R13 saved in SPRN_SCRATCH0 | |
1015 | */ | |
36e7bb38 | 1016 | std r9, HSTATE_SCRATCH2(r13) |
44a3add8 PM |
1017 | |
1018 | lbz r9, HSTATE_IN_GUEST(r13) | |
1019 | cmpwi r9, KVM_GUEST_MODE_HOST_HV | |
1020 | beq kvmppc_bad_host_intr | |
dd96b2c2 AK |
1021 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
1022 | cmpwi r9, KVM_GUEST_MODE_GUEST | |
36e7bb38 | 1023 | ld r9, HSTATE_SCRATCH2(r13) |
dd96b2c2 AK |
1024 | beq kvmppc_interrupt_pr |
1025 | #endif | |
44a3add8 PM |
1026 | /* We're now back in the host but in guest MMU context */ |
1027 | li r9, KVM_GUEST_MODE_HOST_HV | |
1028 | stb r9, HSTATE_IN_GUEST(r13) | |
1029 | ||
de56a948 PM |
1030 | ld r9, HSTATE_KVM_VCPU(r13) |
1031 | ||
1032 | /* Save registers */ | |
1033 | ||
c75df6f9 MN |
1034 | std r0, VCPU_GPR(R0)(r9) |
1035 | std r1, VCPU_GPR(R1)(r9) | |
1036 | std r2, VCPU_GPR(R2)(r9) | |
1037 | std r3, VCPU_GPR(R3)(r9) | |
1038 | std r4, VCPU_GPR(R4)(r9) | |
1039 | std r5, VCPU_GPR(R5)(r9) | |
1040 | std r6, VCPU_GPR(R6)(r9) | |
1041 | std r7, VCPU_GPR(R7)(r9) | |
1042 | std r8, VCPU_GPR(R8)(r9) | |
36e7bb38 | 1043 | ld r0, HSTATE_SCRATCH2(r13) |
c75df6f9 MN |
1044 | std r0, VCPU_GPR(R9)(r9) |
1045 | std r10, VCPU_GPR(R10)(r9) | |
1046 | std r11, VCPU_GPR(R11)(r9) | |
de56a948 PM |
1047 | ld r3, HSTATE_SCRATCH0(r13) |
1048 | lwz r4, HSTATE_SCRATCH1(r13) | |
c75df6f9 | 1049 | std r3, VCPU_GPR(R12)(r9) |
de56a948 | 1050 | stw r4, VCPU_CR(r9) |
0acb9111 PM |
1051 | BEGIN_FTR_SECTION |
1052 | ld r3, HSTATE_CFAR(r13) | |
1053 | std r3, VCPU_CFAR(r9) | |
1054 | END_FTR_SECTION_IFSET(CPU_FTR_CFAR) | |
4b8473c9 PM |
1055 | BEGIN_FTR_SECTION |
1056 | ld r4, HSTATE_PPR(r13) | |
1057 | std r4, VCPU_PPR(r9) | |
1058 | END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) | |
de56a948 PM |
1059 | |
1060 | /* Restore R1/R2 so we can handle faults */ | |
1061 | ld r1, HSTATE_HOST_R1(r13) | |
1062 | ld r2, PACATOC(r13) | |
1063 | ||
1064 | mfspr r10, SPRN_SRR0 | |
1065 | mfspr r11, SPRN_SRR1 | |
1066 | std r10, VCPU_SRR0(r9) | |
1067 | std r11, VCPU_SRR1(r9) | |
1068 | andi. r0, r12, 2 /* need to read HSRR0/1? */ | |
1069 | beq 1f | |
1070 | mfspr r10, SPRN_HSRR0 | |
1071 | mfspr r11, SPRN_HSRR1 | |
1072 | clrrdi r12, r12, 2 | |
1073 | 1: std r10, VCPU_PC(r9) | |
1074 | std r11, VCPU_MSR(r9) | |
1075 | ||
1076 | GET_SCRATCH0(r3) | |
1077 | mflr r4 | |
c75df6f9 | 1078 | std r3, VCPU_GPR(R13)(r9) |
de56a948 PM |
1079 | std r4, VCPU_LR(r9) |
1080 | ||
de56a948 PM |
1081 | stw r12,VCPU_TRAP(r9) |
1082 | ||
b6c295df PM |
1083 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1084 | addi r3, r9, VCPU_TB_RMINTR | |
1085 | mr r4, r9 | |
1086 | bl kvmhv_accumulate_time | |
1087 | ld r5, VCPU_GPR(R5)(r9) | |
1088 | ld r6, VCPU_GPR(R6)(r9) | |
1089 | ld r7, VCPU_GPR(R7)(r9) | |
1090 | ld r8, VCPU_GPR(R8)(r9) | |
1091 | #endif | |
1092 | ||
4a157d61 | 1093 | /* Save HEIR (HV emulation assist reg) in emul_inst |
697d3899 PM |
1094 | if this is an HEI (HV emulation interrupt, e40) */ |
1095 | li r3,KVM_INST_FETCH_FAILED | |
2bf27601 | 1096 | stw r3,VCPU_LAST_INST(r9) |
697d3899 PM |
1097 | cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST |
1098 | bne 11f | |
1099 | mfspr r3,SPRN_HEIR | |
4a157d61 | 1100 | 11: stw r3,VCPU_HEIR(r9) |
697d3899 PM |
1101 | |
1102 | /* these are volatile across C function calls */ | |
1103 | mfctr r3 | |
1104 | mfxer r4 | |
1105 | std r3, VCPU_CTR(r9) | |
1106 | stw r4, VCPU_XER(r9) | |
1107 | ||
697d3899 PM |
1108 | /* If this is a page table miss then see if it's theirs or ours */ |
1109 | cmpwi r12, BOOK3S_INTERRUPT_H_DATA_STORAGE | |
1110 | beq kvmppc_hdsi | |
342d3db7 PM |
1111 | cmpwi r12, BOOK3S_INTERRUPT_H_INST_STORAGE |
1112 | beq kvmppc_hisi | |
697d3899 | 1113 | |
de56a948 PM |
1114 | /* See if this is a leftover HDEC interrupt */ |
1115 | cmpwi r12,BOOK3S_INTERRUPT_HV_DECREMENTER | |
1116 | bne 2f | |
1117 | mfspr r3,SPRN_HDEC | |
1118 | cmpwi r3,0 | |
1f09c3ed PM |
1119 | mr r4,r9 |
1120 | bge fast_guest_return | |
de56a948 | 1121 | 2: |
697d3899 | 1122 | /* See if this is an hcall we can handle in real mode */ |
a8606e20 PM |
1123 | cmpwi r12,BOOK3S_INTERRUPT_SYSCALL |
1124 | beq hcall_try_real_mode | |
de56a948 | 1125 | |
66feed61 PM |
1126 | /* Hypervisor doorbell - exit only if host IPI flag set */ |
1127 | cmpwi r12, BOOK3S_INTERRUPT_H_DOORBELL | |
1128 | bne 3f | |
1129 | lbz r0, HSTATE_HOST_IPI(r13) | |
1130 | beq 4f | |
1131 | b guest_exit_cont | |
1132 | 3: | |
54695c30 BH |
1133 | /* External interrupt ? */ |
1134 | cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL | |
1f09c3ed | 1135 | bne+ guest_exit_cont |
54695c30 BH |
1136 | |
1137 | /* External interrupt, first check for host_ipi. If this is | |
1138 | * set, we know the host wants us out so let's do it now | |
1139 | */ | |
c934243c PM |
1140 | bl kvmppc_read_intr |
1141 | cmpdi r3, 0 | |
1f09c3ed | 1142 | bgt guest_exit_cont |
54695c30 | 1143 | |
4619ac88 | 1144 | /* Check if any CPU is heading out to the host, if so head out too */ |
66feed61 | 1145 | 4: ld r5, HSTATE_KVM_VCORE(r13) |
4619ac88 PM |
1146 | lwz r0, VCORE_ENTRY_EXIT(r5) |
1147 | cmpwi r0, 0x100 | |
e3bbbbfa | 1148 | mr r4, r9 |
1f09c3ed | 1149 | blt deliver_guest_interrupt |
de56a948 | 1150 | |
b4072df4 | 1151 | guest_exit_cont: /* r9 = vcpu, r12 = trap, r13 = paca */ |
de56a948 | 1152 | /* Save more register state */ |
de56a948 PM |
1153 | mfdar r6 |
1154 | mfdsisr r7 | |
de56a948 PM |
1155 | std r6, VCPU_DAR(r9) |
1156 | stw r7, VCPU_DSISR(r9) | |
697d3899 | 1157 | /* don't overwrite fault_dar/fault_dsisr if HDSI */ |
de56a948 | 1158 | cmpwi r12,BOOK3S_INTERRUPT_H_DATA_STORAGE |
6af27c84 | 1159 | beq mc_cont |
697d3899 | 1160 | std r6, VCPU_FAULT_DAR(r9) |
de56a948 PM |
1161 | stw r7, VCPU_FAULT_DSISR(r9) |
1162 | ||
b4072df4 PM |
1163 | /* See if it is a machine check */ |
1164 | cmpwi r12, BOOK3S_INTERRUPT_MACHINE_CHECK | |
1165 | beq machine_check_realmode | |
1166 | mc_cont: | |
b6c295df PM |
1167 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1168 | addi r3, r9, VCPU_TB_RMEXIT | |
1169 | mr r4, r9 | |
1170 | bl kvmhv_accumulate_time | |
1171 | #endif | |
b4072df4 | 1172 | |
6af27c84 PM |
1173 | /* Increment exit count, poke other threads to exit */ |
1174 | bl kvmhv_commence_exit | |
eddb60fb PM |
1175 | nop |
1176 | ld r9, HSTATE_KVM_VCPU(r13) | |
1177 | lwz r12, VCPU_TRAP(r9) | |
6af27c84 | 1178 | |
de56a948 | 1179 | /* Save guest CTRL register, set runlatch to 1 */ |
6af27c84 | 1180 | mfspr r6,SPRN_CTRLF |
de56a948 PM |
1181 | stw r6,VCPU_CTRL(r9) |
1182 | andi. r0,r6,1 | |
1183 | bne 4f | |
1184 | ori r6,r6,1 | |
1185 | mtspr SPRN_CTRLT,r6 | |
1186 | 4: | |
1187 | /* Read the guest SLB and save it away */ | |
1188 | lwz r0,VCPU_SLB_NR(r9) /* number of entries in SLB */ | |
1189 | mtctr r0 | |
1190 | li r6,0 | |
1191 | addi r7,r9,VCPU_SLB | |
1192 | li r5,0 | |
1193 | 1: slbmfee r8,r6 | |
1194 | andis. r0,r8,SLB_ESID_V@h | |
1195 | beq 2f | |
1196 | add r8,r8,r6 /* put index in */ | |
1197 | slbmfev r3,r6 | |
1198 | std r8,VCPU_SLB_E(r7) | |
1199 | std r3,VCPU_SLB_V(r7) | |
1200 | addi r7,r7,VCPU_SLB_SIZE | |
1201 | addi r5,r5,1 | |
1202 | 2: addi r6,r6,1 | |
1203 | bdnz 1b | |
1204 | stw r5,VCPU_SLB_MAX(r9) | |
1205 | ||
1206 | /* | |
1207 | * Save the guest PURR/SPURR | |
1208 | */ | |
1209 | mfspr r5,SPRN_PURR | |
1210 | mfspr r6,SPRN_SPURR | |
1211 | ld r7,VCPU_PURR(r9) | |
1212 | ld r8,VCPU_SPURR(r9) | |
1213 | std r5,VCPU_PURR(r9) | |
1214 | std r6,VCPU_SPURR(r9) | |
1215 | subf r5,r7,r5 | |
1216 | subf r6,r8,r6 | |
1217 | ||
1218 | /* | |
1219 | * Restore host PURR/SPURR and add guest times | |
1220 | * so that the time in the guest gets accounted. | |
1221 | */ | |
1222 | ld r3,HSTATE_PURR(r13) | |
1223 | ld r4,HSTATE_SPURR(r13) | |
1224 | add r3,r3,r5 | |
1225 | add r4,r4,r6 | |
1226 | mtspr SPRN_PURR,r3 | |
1227 | mtspr SPRN_SPURR,r4 | |
1228 | ||
e0b7ec05 PM |
1229 | /* Save DEC */ |
1230 | mfspr r5,SPRN_DEC | |
1231 | mftb r6 | |
1232 | extsw r5,r5 | |
1233 | add r5,r5,r6 | |
c5fb80d3 PM |
1234 | /* r5 is a guest timebase value here, convert to host TB */ |
1235 | ld r3,HSTATE_KVM_VCORE(r13) | |
1236 | ld r4,VCORE_TB_OFFSET(r3) | |
1237 | subf r5,r4,r5 | |
e0b7ec05 PM |
1238 | std r5,VCPU_DEC_EXPIRES(r9) |
1239 | ||
b005255e MN |
1240 | BEGIN_FTR_SECTION |
1241 | b 8f | |
1242 | END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) | |
b005255e MN |
1243 | /* Save POWER8-specific registers */ |
1244 | mfspr r5, SPRN_IAMR | |
1245 | mfspr r6, SPRN_PSPB | |
1246 | mfspr r7, SPRN_FSCR | |
1247 | std r5, VCPU_IAMR(r9) | |
1248 | stw r6, VCPU_PSPB(r9) | |
1249 | std r7, VCPU_FSCR(r9) | |
1250 | mfspr r5, SPRN_IC | |
1251 | mfspr r6, SPRN_VTB | |
1252 | mfspr r7, SPRN_TAR | |
1253 | std r5, VCPU_IC(r9) | |
1254 | std r6, VCPU_VTB(r9) | |
1255 | std r7, VCPU_TAR(r9) | |
7b490411 | 1256 | mfspr r8, SPRN_EBBHR |
b005255e MN |
1257 | std r8, VCPU_EBBHR(r9) |
1258 | mfspr r5, SPRN_EBBRR | |
1259 | mfspr r6, SPRN_BESCR | |
1260 | mfspr r7, SPRN_CSIGR | |
1261 | mfspr r8, SPRN_TACR | |
1262 | std r5, VCPU_EBBRR(r9) | |
1263 | std r6, VCPU_BESCR(r9) | |
1264 | std r7, VCPU_CSIGR(r9) | |
1265 | std r8, VCPU_TACR(r9) | |
1266 | mfspr r5, SPRN_TCSCR | |
1267 | mfspr r6, SPRN_ACOP | |
1268 | mfspr r7, SPRN_PID | |
1269 | mfspr r8, SPRN_WORT | |
1270 | std r5, VCPU_TCSCR(r9) | |
1271 | std r6, VCPU_ACOP(r9) | |
1272 | stw r7, VCPU_GUEST_PID(r9) | |
1273 | std r8, VCPU_WORT(r9) | |
1274 | 8: | |
1275 | ||
e0b7ec05 | 1276 | /* Save and reset AMR and UAMOR before turning on the MMU */ |
e0b7ec05 PM |
1277 | mfspr r5,SPRN_AMR |
1278 | mfspr r6,SPRN_UAMOR | |
1279 | std r5,VCPU_AMR(r9) | |
1280 | std r6,VCPU_UAMOR(r9) | |
1281 | li r6,0 | |
1282 | mtspr SPRN_AMR,r6 | |
e0b7ec05 PM |
1283 | |
1284 | /* Switch DSCR back to host value */ | |
e0b7ec05 PM |
1285 | mfspr r8, SPRN_DSCR |
1286 | ld r7, HSTATE_DSCR(r13) | |
1287 | std r8, VCPU_DSCR(r9) | |
1288 | mtspr SPRN_DSCR, r7 | |
e0b7ec05 PM |
1289 | |
1290 | /* Save non-volatile GPRs */ | |
1291 | std r14, VCPU_GPR(R14)(r9) | |
1292 | std r15, VCPU_GPR(R15)(r9) | |
1293 | std r16, VCPU_GPR(R16)(r9) | |
1294 | std r17, VCPU_GPR(R17)(r9) | |
1295 | std r18, VCPU_GPR(R18)(r9) | |
1296 | std r19, VCPU_GPR(R19)(r9) | |
1297 | std r20, VCPU_GPR(R20)(r9) | |
1298 | std r21, VCPU_GPR(R21)(r9) | |
1299 | std r22, VCPU_GPR(R22)(r9) | |
1300 | std r23, VCPU_GPR(R23)(r9) | |
1301 | std r24, VCPU_GPR(R24)(r9) | |
1302 | std r25, VCPU_GPR(R25)(r9) | |
1303 | std r26, VCPU_GPR(R26)(r9) | |
1304 | std r27, VCPU_GPR(R27)(r9) | |
1305 | std r28, VCPU_GPR(R28)(r9) | |
1306 | std r29, VCPU_GPR(R29)(r9) | |
1307 | std r30, VCPU_GPR(R30)(r9) | |
1308 | std r31, VCPU_GPR(R31)(r9) | |
1309 | ||
1310 | /* Save SPRGs */ | |
1311 | mfspr r3, SPRN_SPRG0 | |
1312 | mfspr r4, SPRN_SPRG1 | |
1313 | mfspr r5, SPRN_SPRG2 | |
1314 | mfspr r6, SPRN_SPRG3 | |
1315 | std r3, VCPU_SPRG0(r9) | |
1316 | std r4, VCPU_SPRG1(r9) | |
1317 | std r5, VCPU_SPRG2(r9) | |
1318 | std r6, VCPU_SPRG3(r9) | |
1319 | ||
1320 | /* save FP state */ | |
1321 | mr r3, r9 | |
1322 | bl kvmppc_save_fp | |
de56a948 | 1323 | |
0a8eccef PM |
1324 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1325 | BEGIN_FTR_SECTION | |
1326 | b 2f | |
1327 | END_FTR_SECTION_IFCLR(CPU_FTR_TM) | |
1328 | /* Turn on TM. */ | |
1329 | mfmsr r8 | |
1330 | li r0, 1 | |
1331 | rldimi r8, r0, MSR_TM_LG, 63-MSR_TM_LG | |
1332 | mtmsrd r8 | |
1333 | ||
1334 | ld r5, VCPU_MSR(r9) | |
1335 | rldicl. r5, r5, 64 - MSR_TS_S_LG, 62 | |
1336 | beq 1f /* TM not active in guest. */ | |
1337 | ||
1338 | li r3, TM_CAUSE_KVM_RESCHED | |
1339 | ||
1340 | /* Clear the MSR RI since r1, r13 are all going to be foobar. */ | |
1341 | li r5, 0 | |
1342 | mtmsrd r5, 1 | |
1343 | ||
1344 | /* All GPRs are volatile at this point. */ | |
1345 | TRECLAIM(R3) | |
1346 | ||
1347 | /* Temporarily store r13 and r9 so we have some regs to play with */ | |
1348 | SET_SCRATCH0(r13) | |
1349 | GET_PACA(r13) | |
1350 | std r9, PACATMSCRATCH(r13) | |
1351 | ld r9, HSTATE_KVM_VCPU(r13) | |
1352 | ||
1353 | /* Get a few more GPRs free. */ | |
1354 | std r29, VCPU_GPRS_TM(29)(r9) | |
1355 | std r30, VCPU_GPRS_TM(30)(r9) | |
1356 | std r31, VCPU_GPRS_TM(31)(r9) | |
1357 | ||
1358 | /* Save away PPR and DSCR soon so don't run with user values. */ | |
1359 | mfspr r31, SPRN_PPR | |
1360 | HMT_MEDIUM | |
1361 | mfspr r30, SPRN_DSCR | |
1362 | ld r29, HSTATE_DSCR(r13) | |
1363 | mtspr SPRN_DSCR, r29 | |
1364 | ||
1365 | /* Save all but r9, r13 & r29-r31 */ | |
1366 | reg = 0 | |
1367 | .rept 29 | |
1368 | .if (reg != 9) && (reg != 13) | |
1369 | std reg, VCPU_GPRS_TM(reg)(r9) | |
1370 | .endif | |
1371 | reg = reg + 1 | |
1372 | .endr | |
1373 | /* ... now save r13 */ | |
1374 | GET_SCRATCH0(r4) | |
1375 | std r4, VCPU_GPRS_TM(13)(r9) | |
1376 | /* ... and save r9 */ | |
1377 | ld r4, PACATMSCRATCH(r13) | |
1378 | std r4, VCPU_GPRS_TM(9)(r9) | |
1379 | ||
1380 | /* Reload stack pointer and TOC. */ | |
1381 | ld r1, HSTATE_HOST_R1(r13) | |
1382 | ld r2, PACATOC(r13) | |
1383 | ||
1384 | /* Set MSR RI now we have r1 and r13 back. */ | |
1385 | li r5, MSR_RI | |
1386 | mtmsrd r5, 1 | |
1387 | ||
1388 | /* Save away checkpinted SPRs. */ | |
1389 | std r31, VCPU_PPR_TM(r9) | |
1390 | std r30, VCPU_DSCR_TM(r9) | |
1391 | mflr r5 | |
1392 | mfcr r6 | |
1393 | mfctr r7 | |
1394 | mfspr r8, SPRN_AMR | |
1395 | mfspr r10, SPRN_TAR | |
1396 | std r5, VCPU_LR_TM(r9) | |
1397 | stw r6, VCPU_CR_TM(r9) | |
1398 | std r7, VCPU_CTR_TM(r9) | |
1399 | std r8, VCPU_AMR_TM(r9) | |
1400 | std r10, VCPU_TAR_TM(r9) | |
1401 | ||
1402 | /* Restore r12 as trap number. */ | |
1403 | lwz r12, VCPU_TRAP(r9) | |
1404 | ||
1405 | /* Save FP/VSX. */ | |
1406 | addi r3, r9, VCPU_FPRS_TM | |
9bf163f8 | 1407 | bl store_fp_state |
0a8eccef | 1408 | addi r3, r9, VCPU_VRS_TM |
9bf163f8 | 1409 | bl store_vr_state |
0a8eccef PM |
1410 | mfspr r6, SPRN_VRSAVE |
1411 | stw r6, VCPU_VRSAVE_TM(r9) | |
1412 | 1: | |
1413 | /* | |
1414 | * We need to save these SPRs after the treclaim so that the software | |
1415 | * error code is recorded correctly in the TEXASR. Also the user may | |
1416 | * change these outside of a transaction, so they must always be | |
1417 | * context switched. | |
1418 | */ | |
1419 | mfspr r5, SPRN_TFHAR | |
1420 | mfspr r6, SPRN_TFIAR | |
1421 | mfspr r7, SPRN_TEXASR | |
1422 | std r5, VCPU_TFHAR(r9) | |
1423 | std r6, VCPU_TFIAR(r9) | |
1424 | std r7, VCPU_TEXASR(r9) | |
1425 | 2: | |
1426 | #endif | |
1427 | ||
e0b7ec05 PM |
1428 | /* Increment yield count if they have a VPA */ |
1429 | ld r8, VCPU_VPA(r9) /* do they have a VPA? */ | |
1430 | cmpdi r8, 0 | |
1431 | beq 25f | |
0865a583 AG |
1432 | li r4, LPPACA_YIELDCOUNT |
1433 | LWZX_BE r3, r8, r4 | |
e0b7ec05 | 1434 | addi r3, r3, 1 |
0865a583 | 1435 | STWX_BE r3, r8, r4 |
e0b7ec05 PM |
1436 | li r3, 1 |
1437 | stb r3, VCPU_VPA_DIRTY(r9) | |
1438 | 25: | |
1439 | /* Save PMU registers if requested */ | |
1440 | /* r8 and cr0.eq are live here */ | |
9bc01a9b PM |
1441 | BEGIN_FTR_SECTION |
1442 | /* | |
1443 | * POWER8 seems to have a hardware bug where setting | |
1444 | * MMCR0[PMAE] along with MMCR0[PMC1CE] and/or MMCR0[PMCjCE] | |
1445 | * when some counters are already negative doesn't seem | |
1446 | * to cause a performance monitor alert (and hence interrupt). | |
1447 | * The effect of this is that when saving the PMU state, | |
1448 | * if there is no PMU alert pending when we read MMCR0 | |
1449 | * before freezing the counters, but one becomes pending | |
1450 | * before we read the counters, we lose it. | |
1451 | * To work around this, we need a way to freeze the counters | |
1452 | * before reading MMCR0. Normally, freezing the counters | |
1453 | * is done by writing MMCR0 (to set MMCR0[FC]) which | |
1454 | * unavoidably writes MMCR0[PMA0] as well. On POWER8, | |
1455 | * we can also freeze the counters using MMCR2, by writing | |
1456 | * 1s to all the counter freeze condition bits (there are | |
1457 | * 9 bits each for 6 counters). | |
1458 | */ | |
1459 | li r3, -1 /* set all freeze bits */ | |
1460 | clrrdi r3, r3, 10 | |
1461 | mfspr r10, SPRN_MMCR2 | |
1462 | mtspr SPRN_MMCR2, r3 | |
1463 | isync | |
1464 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
e0b7ec05 PM |
1465 | li r3, 1 |
1466 | sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */ | |
1467 | mfspr r4, SPRN_MMCR0 /* save MMCR0 */ | |
1468 | mtspr SPRN_MMCR0, r3 /* freeze all counters, disable ints */ | |
1469 | mfspr r6, SPRN_MMCRA | |
c17b98cf | 1470 | /* Clear MMCRA in order to disable SDAR updates */ |
e0b7ec05 PM |
1471 | li r7, 0 |
1472 | mtspr SPRN_MMCRA, r7 | |
e0b7ec05 PM |
1473 | isync |
1474 | beq 21f /* if no VPA, save PMU stuff anyway */ | |
1475 | lbz r7, LPPACA_PMCINUSE(r8) | |
1476 | cmpwi r7, 0 /* did they ask for PMU stuff to be saved? */ | |
1477 | bne 21f | |
1478 | std r3, VCPU_MMCR(r9) /* if not, set saved MMCR0 to FC */ | |
1479 | b 22f | |
1480 | 21: mfspr r5, SPRN_MMCR1 | |
1481 | mfspr r7, SPRN_SIAR | |
1482 | mfspr r8, SPRN_SDAR | |
1483 | std r4, VCPU_MMCR(r9) | |
1484 | std r5, VCPU_MMCR + 8(r9) | |
1485 | std r6, VCPU_MMCR + 16(r9) | |
9bc01a9b PM |
1486 | BEGIN_FTR_SECTION |
1487 | std r10, VCPU_MMCR + 24(r9) | |
1488 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
e0b7ec05 PM |
1489 | std r7, VCPU_SIAR(r9) |
1490 | std r8, VCPU_SDAR(r9) | |
1491 | mfspr r3, SPRN_PMC1 | |
1492 | mfspr r4, SPRN_PMC2 | |
1493 | mfspr r5, SPRN_PMC3 | |
1494 | mfspr r6, SPRN_PMC4 | |
1495 | mfspr r7, SPRN_PMC5 | |
1496 | mfspr r8, SPRN_PMC6 | |
e0b7ec05 PM |
1497 | stw r3, VCPU_PMC(r9) |
1498 | stw r4, VCPU_PMC + 4(r9) | |
1499 | stw r5, VCPU_PMC + 8(r9) | |
1500 | stw r6, VCPU_PMC + 12(r9) | |
1501 | stw r7, VCPU_PMC + 16(r9) | |
1502 | stw r8, VCPU_PMC + 20(r9) | |
b005255e | 1503 | BEGIN_FTR_SECTION |
b005255e MN |
1504 | mfspr r5, SPRN_SIER |
1505 | mfspr r6, SPRN_SPMC1 | |
1506 | mfspr r7, SPRN_SPMC2 | |
1507 | mfspr r8, SPRN_MMCRS | |
b005255e MN |
1508 | std r5, VCPU_SIER(r9) |
1509 | stw r6, VCPU_PMC + 24(r9) | |
1510 | stw r7, VCPU_PMC + 28(r9) | |
1511 | std r8, VCPU_MMCR + 32(r9) | |
1512 | lis r4, 0x8000 | |
1513 | mtspr SPRN_MMCRS, r4 | |
1514 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
e0b7ec05 | 1515 | 22: |
de56a948 PM |
1516 | /* Clear out SLB */ |
1517 | li r5,0 | |
1518 | slbmte r5,r5 | |
1519 | slbia | |
1520 | ptesync | |
1521 | ||
9e368f29 | 1522 | /* |
c17b98cf | 1523 | * POWER7/POWER8 guest -> host partition switch code. |
9e368f29 PM |
1524 | * We don't have to lock against tlbies but we do |
1525 | * have to coordinate the hardware threads. | |
1526 | */ | |
b6c295df | 1527 | kvmhv_switch_to_host: |
371fefd6 | 1528 | /* Secondary threads wait for primary to do partition switch */ |
6af27c84 | 1529 | ld r5,HSTATE_KVM_VCORE(r13) |
e0b7ec05 PM |
1530 | ld r4,VCORE_KVM(r5) /* pointer to struct kvm */ |
1531 | lbz r3,HSTATE_PTID(r13) | |
371fefd6 PM |
1532 | cmpwi r3,0 |
1533 | beq 15f | |
1534 | HMT_LOW | |
1535 | 13: lbz r3,VCORE_IN_GUEST(r5) | |
1536 | cmpwi r3,0 | |
1537 | bne 13b | |
1538 | HMT_MEDIUM | |
1539 | b 16f | |
1540 | ||
1541 | /* Primary thread waits for all the secondaries to exit guest */ | |
1542 | 15: lwz r3,VCORE_ENTRY_EXIT(r5) | |
1543 | srwi r0,r3,8 | |
1544 | clrldi r3,r3,56 | |
1545 | cmpw r3,r0 | |
1546 | bne 15b | |
1547 | isync | |
1548 | ||
1549 | /* Primary thread switches back to host partition */ | |
de56a948 PM |
1550 | ld r6,KVM_HOST_SDR1(r4) |
1551 | lwz r7,KVM_HOST_LPID(r4) | |
1552 | li r8,LPID_RSVD /* switch to reserved LPID */ | |
1553 | mtspr SPRN_LPID,r8 | |
1554 | ptesync | |
1555 | mtspr SPRN_SDR1,r6 /* switch to partition page table */ | |
1556 | mtspr SPRN_LPID,r7 | |
1557 | isync | |
93b0f4dc | 1558 | |
b005255e MN |
1559 | BEGIN_FTR_SECTION |
1560 | /* DPDES is shared between threads */ | |
1561 | mfspr r7, SPRN_DPDES | |
1562 | std r7, VCORE_DPDES(r5) | |
1563 | /* clear DPDES so we don't get guest doorbells in the host */ | |
1564 | li r8, 0 | |
1565 | mtspr SPRN_DPDES, r8 | |
1566 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
1567 | ||
93b0f4dc PM |
1568 | /* Subtract timebase offset from timebase */ |
1569 | ld r8,VCORE_TB_OFFSET(r5) | |
1570 | cmpdi r8,0 | |
1571 | beq 17f | |
c5fb80d3 | 1572 | mftb r6 /* current guest timebase */ |
93b0f4dc PM |
1573 | subf r8,r8,r6 |
1574 | mtspr SPRN_TBU40,r8 /* update upper 40 bits */ | |
1575 | mftb r7 /* check if lower 24 bits overflowed */ | |
1576 | clrldi r6,r6,40 | |
1577 | clrldi r7,r7,40 | |
1578 | cmpld r7,r6 | |
1579 | bge 17f | |
1580 | addis r8,r8,0x100 /* if so, increment upper 40 bits */ | |
1581 | mtspr SPRN_TBU40,r8 | |
1582 | ||
388cc6e1 PM |
1583 | /* Reset PCR */ |
1584 | 17: ld r0, VCORE_PCR(r5) | |
1585 | cmpdi r0, 0 | |
1586 | beq 18f | |
1587 | li r0, 0 | |
1588 | mtspr SPRN_PCR, r0 | |
1589 | 18: | |
93b0f4dc | 1590 | /* Signal secondary CPUs to continue */ |
371fefd6 | 1591 | stb r0,VCORE_IN_GUEST(r5) |
de56a948 PM |
1592 | lis r8,0x7fff /* MAX_INT@h */ |
1593 | mtspr SPRN_HDEC,r8 | |
1594 | ||
371fefd6 | 1595 | 16: ld r8,KVM_HOST_LPCR(r4) |
de56a948 PM |
1596 | mtspr SPRN_LPCR,r8 |
1597 | isync | |
1598 | ||
1599 | /* load host SLB entries */ | |
c17b98cf | 1600 | ld r8,PACA_SLBSHADOWPTR(r13) |
de56a948 PM |
1601 | |
1602 | .rept SLB_NUM_BOLTED | |
0865a583 AG |
1603 | li r3, SLBSHADOW_SAVEAREA |
1604 | LDX_BE r5, r8, r3 | |
1605 | addi r3, r3, 8 | |
1606 | LDX_BE r6, r8, r3 | |
de56a948 PM |
1607 | andis. r7,r5,SLB_ESID_V@h |
1608 | beq 1f | |
1609 | slbmte r6,r5 | |
1610 | 1: addi r8,r8,16 | |
1611 | .endr | |
1612 | ||
b6c295df PM |
1613 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1614 | /* Finish timing, if we have a vcpu */ | |
1615 | ld r4, HSTATE_KVM_VCPU(r13) | |
1616 | cmpdi r4, 0 | |
1617 | li r3, 0 | |
1618 | beq 2f | |
1619 | bl kvmhv_accumulate_time | |
1620 | 2: | |
1621 | #endif | |
44a3add8 PM |
1622 | /* Unset guest mode */ |
1623 | li r0, KVM_GUEST_MODE_NONE | |
1624 | stb r0, HSTATE_IN_GUEST(r13) | |
1625 | ||
218309b7 PM |
1626 | ld r0, 112+PPC_LR_STKOFF(r1) |
1627 | addi r1, r1, 112 | |
1628 | mtlr r0 | |
1629 | blr | |
b4072df4 | 1630 | |
697d3899 PM |
1631 | /* |
1632 | * Check whether an HDSI is an HPTE not found fault or something else. | |
1633 | * If it is an HPTE not found fault that is due to the guest accessing | |
1634 | * a page that they have mapped but which we have paged out, then | |
1635 | * we continue on with the guest exit path. In all other cases, | |
1636 | * reflect the HDSI to the guest as a DSI. | |
1637 | */ | |
1638 | kvmppc_hdsi: | |
1639 | mfspr r4, SPRN_HDAR | |
1640 | mfspr r6, SPRN_HDSISR | |
4cf302bc PM |
1641 | /* HPTE not found fault or protection fault? */ |
1642 | andis. r0, r6, (DSISR_NOHPTE | DSISR_PROTFAULT)@h | |
697d3899 PM |
1643 | beq 1f /* if not, send it to the guest */ |
1644 | andi. r0, r11, MSR_DR /* data relocation enabled? */ | |
1645 | beq 3f | |
1646 | clrrdi r0, r4, 28 | |
c75df6f9 | 1647 | PPC_SLBFEE_DOT(R5, R0) /* if so, look up SLB */ |
697d3899 PM |
1648 | bne 1f /* if no SLB entry found */ |
1649 | 4: std r4, VCPU_FAULT_DAR(r9) | |
1650 | stw r6, VCPU_FAULT_DSISR(r9) | |
1651 | ||
1652 | /* Search the hash table. */ | |
1653 | mr r3, r9 /* vcpu pointer */ | |
342d3db7 | 1654 | li r7, 1 /* data fault */ |
b1576fec | 1655 | bl kvmppc_hpte_hv_fault |
697d3899 PM |
1656 | ld r9, HSTATE_KVM_VCPU(r13) |
1657 | ld r10, VCPU_PC(r9) | |
1658 | ld r11, VCPU_MSR(r9) | |
1659 | li r12, BOOK3S_INTERRUPT_H_DATA_STORAGE | |
1660 | cmpdi r3, 0 /* retry the instruction */ | |
1661 | beq 6f | |
1662 | cmpdi r3, -1 /* handle in kernel mode */ | |
b4072df4 | 1663 | beq guest_exit_cont |
697d3899 PM |
1664 | cmpdi r3, -2 /* MMIO emulation; need instr word */ |
1665 | beq 2f | |
1666 | ||
1667 | /* Synthesize a DSI for the guest */ | |
1668 | ld r4, VCPU_FAULT_DAR(r9) | |
1669 | mr r6, r3 | |
1670 | 1: mtspr SPRN_DAR, r4 | |
1671 | mtspr SPRN_DSISR, r6 | |
1672 | mtspr SPRN_SRR0, r10 | |
1673 | mtspr SPRN_SRR1, r11 | |
1674 | li r10, BOOK3S_INTERRUPT_DATA_STORAGE | |
e4e38121 | 1675 | bl kvmppc_msr_interrupt |
b4072df4 | 1676 | fast_interrupt_c_return: |
697d3899 PM |
1677 | 6: ld r7, VCPU_CTR(r9) |
1678 | lwz r8, VCPU_XER(r9) | |
1679 | mtctr r7 | |
1680 | mtxer r8 | |
1681 | mr r4, r9 | |
1682 | b fast_guest_return | |
1683 | ||
1684 | 3: ld r5, VCPU_KVM(r9) /* not relocated, use VRMA */ | |
1685 | ld r5, KVM_VRMA_SLB_V(r5) | |
1686 | b 4b | |
1687 | ||
1688 | /* If this is for emulated MMIO, load the instruction word */ | |
1689 | 2: li r8, KVM_INST_FETCH_FAILED /* In case lwz faults */ | |
1690 | ||
1691 | /* Set guest mode to 'jump over instruction' so if lwz faults | |
1692 | * we'll just continue at the next IP. */ | |
1693 | li r0, KVM_GUEST_MODE_SKIP | |
1694 | stb r0, HSTATE_IN_GUEST(r13) | |
1695 | ||
1696 | /* Do the access with MSR:DR enabled */ | |
1697 | mfmsr r3 | |
1698 | ori r4, r3, MSR_DR /* Enable paging for data */ | |
1699 | mtmsrd r4 | |
1700 | lwz r8, 0(r10) | |
1701 | mtmsrd r3 | |
1702 | ||
1703 | /* Store the result */ | |
1704 | stw r8, VCPU_LAST_INST(r9) | |
1705 | ||
1706 | /* Unset guest mode. */ | |
44a3add8 | 1707 | li r0, KVM_GUEST_MODE_HOST_HV |
697d3899 | 1708 | stb r0, HSTATE_IN_GUEST(r13) |
b4072df4 | 1709 | b guest_exit_cont |
de56a948 | 1710 | |
342d3db7 PM |
1711 | /* |
1712 | * Similarly for an HISI, reflect it to the guest as an ISI unless | |
1713 | * it is an HPTE not found fault for a page that we have paged out. | |
1714 | */ | |
1715 | kvmppc_hisi: | |
1716 | andis. r0, r11, SRR1_ISI_NOPT@h | |
1717 | beq 1f | |
1718 | andi. r0, r11, MSR_IR /* instruction relocation enabled? */ | |
1719 | beq 3f | |
1720 | clrrdi r0, r10, 28 | |
c75df6f9 | 1721 | PPC_SLBFEE_DOT(R5, R0) /* if so, look up SLB */ |
342d3db7 PM |
1722 | bne 1f /* if no SLB entry found */ |
1723 | 4: | |
1724 | /* Search the hash table. */ | |
1725 | mr r3, r9 /* vcpu pointer */ | |
1726 | mr r4, r10 | |
1727 | mr r6, r11 | |
1728 | li r7, 0 /* instruction fault */ | |
b1576fec | 1729 | bl kvmppc_hpte_hv_fault |
342d3db7 PM |
1730 | ld r9, HSTATE_KVM_VCPU(r13) |
1731 | ld r10, VCPU_PC(r9) | |
1732 | ld r11, VCPU_MSR(r9) | |
1733 | li r12, BOOK3S_INTERRUPT_H_INST_STORAGE | |
1734 | cmpdi r3, 0 /* retry the instruction */ | |
b4072df4 | 1735 | beq fast_interrupt_c_return |
342d3db7 | 1736 | cmpdi r3, -1 /* handle in kernel mode */ |
b4072df4 | 1737 | beq guest_exit_cont |
342d3db7 PM |
1738 | |
1739 | /* Synthesize an ISI for the guest */ | |
1740 | mr r11, r3 | |
1741 | 1: mtspr SPRN_SRR0, r10 | |
1742 | mtspr SPRN_SRR1, r11 | |
1743 | li r10, BOOK3S_INTERRUPT_INST_STORAGE | |
e4e38121 | 1744 | bl kvmppc_msr_interrupt |
b4072df4 | 1745 | b fast_interrupt_c_return |
342d3db7 PM |
1746 | |
1747 | 3: ld r6, VCPU_KVM(r9) /* not relocated, use VRMA */ | |
1748 | ld r5, KVM_VRMA_SLB_V(r6) | |
1749 | b 4b | |
1750 | ||
a8606e20 PM |
1751 | /* |
1752 | * Try to handle an hcall in real mode. | |
1753 | * Returns to the guest if we handle it, or continues on up to | |
1754 | * the kernel if we can't (i.e. if we don't have a handler for | |
1755 | * it, or if the handler returns H_TOO_HARD). | |
1f09c3ed PM |
1756 | * |
1757 | * r5 - r8 contain hcall args, | |
1758 | * r9 = vcpu, r10 = pc, r11 = msr, r12 = trap, r13 = paca | |
a8606e20 | 1759 | */ |
a8606e20 | 1760 | hcall_try_real_mode: |
c75df6f9 | 1761 | ld r3,VCPU_GPR(R3)(r9) |
a8606e20 | 1762 | andi. r0,r11,MSR_PR |
27025a60 LPF |
1763 | /* sc 1 from userspace - reflect to guest syscall */ |
1764 | bne sc_1_fast_return | |
a8606e20 PM |
1765 | clrrdi r3,r3,2 |
1766 | cmpldi r3,hcall_real_table_end - hcall_real_table | |
b4072df4 | 1767 | bge guest_exit_cont |
699a0ea0 PM |
1768 | /* See if this hcall is enabled for in-kernel handling */ |
1769 | ld r4, VCPU_KVM(r9) | |
1770 | srdi r0, r3, 8 /* r0 = (r3 / 4) >> 6 */ | |
1771 | sldi r0, r0, 3 /* index into kvm->arch.enabled_hcalls[] */ | |
1772 | add r4, r4, r0 | |
1773 | ld r0, KVM_ENABLED_HCALLS(r4) | |
1774 | rlwinm r4, r3, 32-2, 0x3f /* r4 = (r3 / 4) & 0x3f */ | |
1775 | srd r0, r0, r4 | |
1776 | andi. r0, r0, 1 | |
1777 | beq guest_exit_cont | |
1778 | /* Get pointer to handler, if any, and call it */ | |
a8606e20 | 1779 | LOAD_REG_ADDR(r4, hcall_real_table) |
4baa1d87 | 1780 | lwax r3,r3,r4 |
a8606e20 | 1781 | cmpwi r3,0 |
b4072df4 | 1782 | beq guest_exit_cont |
05a308c7 AB |
1783 | add r12,r3,r4 |
1784 | mtctr r12 | |
a8606e20 | 1785 | mr r3,r9 /* get vcpu pointer */ |
c75df6f9 | 1786 | ld r4,VCPU_GPR(R4)(r9) |
a8606e20 PM |
1787 | bctrl |
1788 | cmpdi r3,H_TOO_HARD | |
1789 | beq hcall_real_fallback | |
1790 | ld r4,HSTATE_KVM_VCPU(r13) | |
c75df6f9 | 1791 | std r3,VCPU_GPR(R3)(r4) |
a8606e20 PM |
1792 | ld r10,VCPU_PC(r4) |
1793 | ld r11,VCPU_MSR(r4) | |
1794 | b fast_guest_return | |
1795 | ||
27025a60 LPF |
1796 | sc_1_fast_return: |
1797 | mtspr SPRN_SRR0,r10 | |
1798 | mtspr SPRN_SRR1,r11 | |
1799 | li r10, BOOK3S_INTERRUPT_SYSCALL | |
e4e38121 | 1800 | bl kvmppc_msr_interrupt |
27025a60 LPF |
1801 | mr r4,r9 |
1802 | b fast_guest_return | |
1803 | ||
a8606e20 PM |
1804 | /* We've attempted a real mode hcall, but it's punted it back |
1805 | * to userspace. We need to restore some clobbered volatiles | |
1806 | * before resuming the pass-it-to-qemu path */ | |
1807 | hcall_real_fallback: | |
1808 | li r12,BOOK3S_INTERRUPT_SYSCALL | |
1809 | ld r9, HSTATE_KVM_VCPU(r13) | |
a8606e20 | 1810 | |
b4072df4 | 1811 | b guest_exit_cont |
a8606e20 PM |
1812 | |
1813 | .globl hcall_real_table | |
1814 | hcall_real_table: | |
1815 | .long 0 /* 0 - unused */ | |
c1fb0194 AB |
1816 | .long DOTSYM(kvmppc_h_remove) - hcall_real_table |
1817 | .long DOTSYM(kvmppc_h_enter) - hcall_real_table | |
1818 | .long DOTSYM(kvmppc_h_read) - hcall_real_table | |
a8606e20 PM |
1819 | .long 0 /* 0x10 - H_CLEAR_MOD */ |
1820 | .long 0 /* 0x14 - H_CLEAR_REF */ | |
c1fb0194 AB |
1821 | .long DOTSYM(kvmppc_h_protect) - hcall_real_table |
1822 | .long DOTSYM(kvmppc_h_get_tce) - hcall_real_table | |
1823 | .long DOTSYM(kvmppc_h_put_tce) - hcall_real_table | |
a8606e20 | 1824 | .long 0 /* 0x24 - H_SET_SPRG0 */ |
c1fb0194 | 1825 | .long DOTSYM(kvmppc_h_set_dabr) - hcall_real_table |
a8606e20 PM |
1826 | .long 0 /* 0x2c */ |
1827 | .long 0 /* 0x30 */ | |
1828 | .long 0 /* 0x34 */ | |
1829 | .long 0 /* 0x38 */ | |
1830 | .long 0 /* 0x3c */ | |
1831 | .long 0 /* 0x40 */ | |
1832 | .long 0 /* 0x44 */ | |
1833 | .long 0 /* 0x48 */ | |
1834 | .long 0 /* 0x4c */ | |
1835 | .long 0 /* 0x50 */ | |
1836 | .long 0 /* 0x54 */ | |
1837 | .long 0 /* 0x58 */ | |
1838 | .long 0 /* 0x5c */ | |
1839 | .long 0 /* 0x60 */ | |
e7d26f28 | 1840 | #ifdef CONFIG_KVM_XICS |
c1fb0194 AB |
1841 | .long DOTSYM(kvmppc_rm_h_eoi) - hcall_real_table |
1842 | .long DOTSYM(kvmppc_rm_h_cppr) - hcall_real_table | |
1843 | .long DOTSYM(kvmppc_rm_h_ipi) - hcall_real_table | |
e7d26f28 | 1844 | .long 0 /* 0x70 - H_IPOLL */ |
c1fb0194 | 1845 | .long DOTSYM(kvmppc_rm_h_xirr) - hcall_real_table |
e7d26f28 BH |
1846 | #else |
1847 | .long 0 /* 0x64 - H_EOI */ | |
1848 | .long 0 /* 0x68 - H_CPPR */ | |
1849 | .long 0 /* 0x6c - H_IPI */ | |
1850 | .long 0 /* 0x70 - H_IPOLL */ | |
1851 | .long 0 /* 0x74 - H_XIRR */ | |
1852 | #endif | |
a8606e20 PM |
1853 | .long 0 /* 0x78 */ |
1854 | .long 0 /* 0x7c */ | |
1855 | .long 0 /* 0x80 */ | |
1856 | .long 0 /* 0x84 */ | |
1857 | .long 0 /* 0x88 */ | |
1858 | .long 0 /* 0x8c */ | |
1859 | .long 0 /* 0x90 */ | |
1860 | .long 0 /* 0x94 */ | |
1861 | .long 0 /* 0x98 */ | |
1862 | .long 0 /* 0x9c */ | |
1863 | .long 0 /* 0xa0 */ | |
1864 | .long 0 /* 0xa4 */ | |
1865 | .long 0 /* 0xa8 */ | |
1866 | .long 0 /* 0xac */ | |
1867 | .long 0 /* 0xb0 */ | |
1868 | .long 0 /* 0xb4 */ | |
1869 | .long 0 /* 0xb8 */ | |
1870 | .long 0 /* 0xbc */ | |
1871 | .long 0 /* 0xc0 */ | |
1872 | .long 0 /* 0xc4 */ | |
1873 | .long 0 /* 0xc8 */ | |
1874 | .long 0 /* 0xcc */ | |
1875 | .long 0 /* 0xd0 */ | |
1876 | .long 0 /* 0xd4 */ | |
1877 | .long 0 /* 0xd8 */ | |
1878 | .long 0 /* 0xdc */ | |
c1fb0194 | 1879 | .long DOTSYM(kvmppc_h_cede) - hcall_real_table |
90fd09f8 | 1880 | .long DOTSYM(kvmppc_rm_h_confer) - hcall_real_table |
a8606e20 PM |
1881 | .long 0 /* 0xe8 */ |
1882 | .long 0 /* 0xec */ | |
1883 | .long 0 /* 0xf0 */ | |
1884 | .long 0 /* 0xf4 */ | |
1885 | .long 0 /* 0xf8 */ | |
1886 | .long 0 /* 0xfc */ | |
1887 | .long 0 /* 0x100 */ | |
1888 | .long 0 /* 0x104 */ | |
1889 | .long 0 /* 0x108 */ | |
1890 | .long 0 /* 0x10c */ | |
1891 | .long 0 /* 0x110 */ | |
1892 | .long 0 /* 0x114 */ | |
1893 | .long 0 /* 0x118 */ | |
1894 | .long 0 /* 0x11c */ | |
1895 | .long 0 /* 0x120 */ | |
c1fb0194 | 1896 | .long DOTSYM(kvmppc_h_bulk_remove) - hcall_real_table |
8563bf52 PM |
1897 | .long 0 /* 0x128 */ |
1898 | .long 0 /* 0x12c */ | |
1899 | .long 0 /* 0x130 */ | |
c1fb0194 | 1900 | .long DOTSYM(kvmppc_h_set_xdabr) - hcall_real_table |
e928e9cb ME |
1901 | .long 0 /* 0x138 */ |
1902 | .long 0 /* 0x13c */ | |
1903 | .long 0 /* 0x140 */ | |
1904 | .long 0 /* 0x144 */ | |
1905 | .long 0 /* 0x148 */ | |
1906 | .long 0 /* 0x14c */ | |
1907 | .long 0 /* 0x150 */ | |
1908 | .long 0 /* 0x154 */ | |
1909 | .long 0 /* 0x158 */ | |
1910 | .long 0 /* 0x15c */ | |
1911 | .long 0 /* 0x160 */ | |
1912 | .long 0 /* 0x164 */ | |
1913 | .long 0 /* 0x168 */ | |
1914 | .long 0 /* 0x16c */ | |
1915 | .long 0 /* 0x170 */ | |
1916 | .long 0 /* 0x174 */ | |
1917 | .long 0 /* 0x178 */ | |
1918 | .long 0 /* 0x17c */ | |
1919 | .long 0 /* 0x180 */ | |
1920 | .long 0 /* 0x184 */ | |
1921 | .long 0 /* 0x188 */ | |
1922 | .long 0 /* 0x18c */ | |
1923 | .long 0 /* 0x190 */ | |
1924 | .long 0 /* 0x194 */ | |
1925 | .long 0 /* 0x198 */ | |
1926 | .long 0 /* 0x19c */ | |
1927 | .long 0 /* 0x1a0 */ | |
1928 | .long 0 /* 0x1a4 */ | |
1929 | .long 0 /* 0x1a8 */ | |
1930 | .long 0 /* 0x1ac */ | |
1931 | .long 0 /* 0x1b0 */ | |
1932 | .long 0 /* 0x1b4 */ | |
1933 | .long 0 /* 0x1b8 */ | |
1934 | .long 0 /* 0x1bc */ | |
1935 | .long 0 /* 0x1c0 */ | |
1936 | .long 0 /* 0x1c4 */ | |
1937 | .long 0 /* 0x1c8 */ | |
1938 | .long 0 /* 0x1cc */ | |
1939 | .long 0 /* 0x1d0 */ | |
1940 | .long 0 /* 0x1d4 */ | |
1941 | .long 0 /* 0x1d8 */ | |
1942 | .long 0 /* 0x1dc */ | |
1943 | .long 0 /* 0x1e0 */ | |
1944 | .long 0 /* 0x1e4 */ | |
1945 | .long 0 /* 0x1e8 */ | |
1946 | .long 0 /* 0x1ec */ | |
1947 | .long 0 /* 0x1f0 */ | |
1948 | .long 0 /* 0x1f4 */ | |
1949 | .long 0 /* 0x1f8 */ | |
1950 | .long 0 /* 0x1fc */ | |
1951 | .long 0 /* 0x200 */ | |
1952 | .long 0 /* 0x204 */ | |
1953 | .long 0 /* 0x208 */ | |
1954 | .long 0 /* 0x20c */ | |
1955 | .long 0 /* 0x210 */ | |
1956 | .long 0 /* 0x214 */ | |
1957 | .long 0 /* 0x218 */ | |
1958 | .long 0 /* 0x21c */ | |
1959 | .long 0 /* 0x220 */ | |
1960 | .long 0 /* 0x224 */ | |
1961 | .long 0 /* 0x228 */ | |
1962 | .long 0 /* 0x22c */ | |
1963 | .long 0 /* 0x230 */ | |
1964 | .long 0 /* 0x234 */ | |
1965 | .long 0 /* 0x238 */ | |
1966 | .long 0 /* 0x23c */ | |
1967 | .long 0 /* 0x240 */ | |
1968 | .long 0 /* 0x244 */ | |
1969 | .long 0 /* 0x248 */ | |
1970 | .long 0 /* 0x24c */ | |
1971 | .long 0 /* 0x250 */ | |
1972 | .long 0 /* 0x254 */ | |
1973 | .long 0 /* 0x258 */ | |
1974 | .long 0 /* 0x25c */ | |
1975 | .long 0 /* 0x260 */ | |
1976 | .long 0 /* 0x264 */ | |
1977 | .long 0 /* 0x268 */ | |
1978 | .long 0 /* 0x26c */ | |
1979 | .long 0 /* 0x270 */ | |
1980 | .long 0 /* 0x274 */ | |
1981 | .long 0 /* 0x278 */ | |
1982 | .long 0 /* 0x27c */ | |
1983 | .long 0 /* 0x280 */ | |
1984 | .long 0 /* 0x284 */ | |
1985 | .long 0 /* 0x288 */ | |
1986 | .long 0 /* 0x28c */ | |
1987 | .long 0 /* 0x290 */ | |
1988 | .long 0 /* 0x294 */ | |
1989 | .long 0 /* 0x298 */ | |
1990 | .long 0 /* 0x29c */ | |
1991 | .long 0 /* 0x2a0 */ | |
1992 | .long 0 /* 0x2a4 */ | |
1993 | .long 0 /* 0x2a8 */ | |
1994 | .long 0 /* 0x2ac */ | |
1995 | .long 0 /* 0x2b0 */ | |
1996 | .long 0 /* 0x2b4 */ | |
1997 | .long 0 /* 0x2b8 */ | |
1998 | .long 0 /* 0x2bc */ | |
1999 | .long 0 /* 0x2c0 */ | |
2000 | .long 0 /* 0x2c4 */ | |
2001 | .long 0 /* 0x2c8 */ | |
2002 | .long 0 /* 0x2cc */ | |
2003 | .long 0 /* 0x2d0 */ | |
2004 | .long 0 /* 0x2d4 */ | |
2005 | .long 0 /* 0x2d8 */ | |
2006 | .long 0 /* 0x2dc */ | |
2007 | .long 0 /* 0x2e0 */ | |
2008 | .long 0 /* 0x2e4 */ | |
2009 | .long 0 /* 0x2e8 */ | |
2010 | .long 0 /* 0x2ec */ | |
2011 | .long 0 /* 0x2f0 */ | |
2012 | .long 0 /* 0x2f4 */ | |
2013 | .long 0 /* 0x2f8 */ | |
2014 | .long 0 /* 0x2fc */ | |
2015 | .long DOTSYM(kvmppc_h_random) - hcall_real_table | |
ae2113a4 | 2016 | .globl hcall_real_table_end |
a8606e20 PM |
2017 | hcall_real_table_end: |
2018 | ||
8563bf52 PM |
2019 | _GLOBAL(kvmppc_h_set_xdabr) |
2020 | andi. r0, r5, DABRX_USER | DABRX_KERNEL | |
2021 | beq 6f | |
2022 | li r0, DABRX_USER | DABRX_KERNEL | DABRX_BTI | |
2023 | andc. r0, r5, r0 | |
2024 | beq 3f | |
2025 | 6: li r3, H_PARAMETER | |
2026 | blr | |
2027 | ||
a8606e20 | 2028 | _GLOBAL(kvmppc_h_set_dabr) |
8563bf52 PM |
2029 | li r5, DABRX_USER | DABRX_KERNEL |
2030 | 3: | |
eee7ff9d MN |
2031 | BEGIN_FTR_SECTION |
2032 | b 2f | |
2033 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) | |
a8606e20 | 2034 | std r4,VCPU_DABR(r3) |
8563bf52 PM |
2035 | stw r5, VCPU_DABRX(r3) |
2036 | mtspr SPRN_DABRX, r5 | |
8943633c PM |
2037 | /* Work around P7 bug where DABR can get corrupted on mtspr */ |
2038 | 1: mtspr SPRN_DABR,r4 | |
2039 | mfspr r5, SPRN_DABR | |
2040 | cmpd r4, r5 | |
2041 | bne 1b | |
2042 | isync | |
a8606e20 PM |
2043 | li r3,0 |
2044 | blr | |
2045 | ||
8563bf52 PM |
2046 | /* Emulate H_SET_DABR/X on P8 for the sake of compat mode guests */ |
2047 | 2: rlwimi r5, r4, 5, DAWRX_DR | DAWRX_DW | |
2048 | rlwimi r5, r4, 1, DAWRX_WT | |
2049 | clrrdi r4, r4, 3 | |
2050 | std r4, VCPU_DAWR(r3) | |
2051 | std r5, VCPU_DAWRX(r3) | |
2052 | mtspr SPRN_DAWR, r4 | |
2053 | mtspr SPRN_DAWRX, r5 | |
2054 | li r3, 0 | |
a8606e20 PM |
2055 | blr |
2056 | ||
1f09c3ed | 2057 | _GLOBAL(kvmppc_h_cede) /* r3 = vcpu pointer, r11 = msr, r13 = paca */ |
19ccb76a PM |
2058 | ori r11,r11,MSR_EE |
2059 | std r11,VCPU_MSR(r3) | |
2060 | li r0,1 | |
2061 | stb r0,VCPU_CEDED(r3) | |
2062 | sync /* order setting ceded vs. testing prodded */ | |
2063 | lbz r5,VCPU_PRODDED(r3) | |
2064 | cmpwi r5,0 | |
04f995a5 | 2065 | bne kvm_cede_prodded |
6af27c84 PM |
2066 | li r12,0 /* set trap to 0 to say hcall is handled */ |
2067 | stw r12,VCPU_TRAP(r3) | |
19ccb76a | 2068 | li r0,H_SUCCESS |
c75df6f9 | 2069 | std r0,VCPU_GPR(R3)(r3) |
19ccb76a PM |
2070 | |
2071 | /* | |
2072 | * Set our bit in the bitmask of napping threads unless all the | |
2073 | * other threads are already napping, in which case we send this | |
2074 | * up to the host. | |
2075 | */ | |
2076 | ld r5,HSTATE_KVM_VCORE(r13) | |
e0b7ec05 | 2077 | lbz r6,HSTATE_PTID(r13) |
19ccb76a PM |
2078 | lwz r8,VCORE_ENTRY_EXIT(r5) |
2079 | clrldi r8,r8,56 | |
2080 | li r0,1 | |
2081 | sld r0,r0,r6 | |
2082 | addi r6,r5,VCORE_NAPPING_THREADS | |
2083 | 31: lwarx r4,0,r6 | |
2084 | or r4,r4,r0 | |
7d6c40da PM |
2085 | cmpw r4,r8 |
2086 | beq kvm_cede_exit | |
19ccb76a PM |
2087 | stwcx. r4,0,r6 |
2088 | bne 31b | |
7d6c40da | 2089 | /* order napping_threads update vs testing entry_exit_map */ |
f019b7ad | 2090 | isync |
e0b7ec05 | 2091 | li r0,NAPPING_CEDE |
19ccb76a | 2092 | stb r0,HSTATE_NAPPING(r13) |
19ccb76a PM |
2093 | lwz r7,VCORE_ENTRY_EXIT(r5) |
2094 | cmpwi r7,0x100 | |
2095 | bge 33f /* another thread already exiting */ | |
2096 | ||
2097 | /* | |
2098 | * Although not specifically required by the architecture, POWER7 | |
2099 | * preserves the following registers in nap mode, even if an SMT mode | |
2100 | * switch occurs: SLB entries, PURR, SPURR, AMOR, UAMOR, AMR, SPRG0-3, | |
2101 | * DAR, DSISR, DABR, DABRX, DSCR, PMCx, MMCRx, SIAR, SDAR. | |
2102 | */ | |
2103 | /* Save non-volatile GPRs */ | |
c75df6f9 MN |
2104 | std r14, VCPU_GPR(R14)(r3) |
2105 | std r15, VCPU_GPR(R15)(r3) | |
2106 | std r16, VCPU_GPR(R16)(r3) | |
2107 | std r17, VCPU_GPR(R17)(r3) | |
2108 | std r18, VCPU_GPR(R18)(r3) | |
2109 | std r19, VCPU_GPR(R19)(r3) | |
2110 | std r20, VCPU_GPR(R20)(r3) | |
2111 | std r21, VCPU_GPR(R21)(r3) | |
2112 | std r22, VCPU_GPR(R22)(r3) | |
2113 | std r23, VCPU_GPR(R23)(r3) | |
2114 | std r24, VCPU_GPR(R24)(r3) | |
2115 | std r25, VCPU_GPR(R25)(r3) | |
2116 | std r26, VCPU_GPR(R26)(r3) | |
2117 | std r27, VCPU_GPR(R27)(r3) | |
2118 | std r28, VCPU_GPR(R28)(r3) | |
2119 | std r29, VCPU_GPR(R29)(r3) | |
2120 | std r30, VCPU_GPR(R30)(r3) | |
2121 | std r31, VCPU_GPR(R31)(r3) | |
19ccb76a PM |
2122 | |
2123 | /* save FP state */ | |
595e4f7e | 2124 | bl kvmppc_save_fp |
19ccb76a | 2125 | |
fd6d53b1 PM |
2126 | /* |
2127 | * Set DEC to the smaller of DEC and HDEC, so that we wake | |
2128 | * no later than the end of our timeslice (HDEC interrupts | |
2129 | * don't wake us from nap). | |
2130 | */ | |
2131 | mfspr r3, SPRN_DEC | |
2132 | mfspr r4, SPRN_HDEC | |
2133 | mftb r5 | |
2134 | cmpw r3, r4 | |
2135 | ble 67f | |
2136 | mtspr SPRN_DEC, r4 | |
2137 | 67: | |
2138 | /* save expiry time of guest decrementer */ | |
2139 | extsw r3, r3 | |
2140 | add r3, r3, r5 | |
2141 | ld r4, HSTATE_KVM_VCPU(r13) | |
2142 | ld r5, HSTATE_KVM_VCORE(r13) | |
2143 | ld r6, VCORE_TB_OFFSET(r5) | |
2144 | subf r3, r6, r3 /* convert to host TB value */ | |
2145 | std r3, VCPU_DEC_EXPIRES(r4) | |
2146 | ||
b6c295df PM |
2147 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
2148 | ld r4, HSTATE_KVM_VCPU(r13) | |
2149 | addi r3, r4, VCPU_TB_CEDE | |
2150 | bl kvmhv_accumulate_time | |
2151 | #endif | |
2152 | ||
ccc07772 PM |
2153 | lis r3, LPCR_PECEDP@h /* Do wake on privileged doorbell */ |
2154 | ||
19ccb76a | 2155 | /* |
aa31e843 | 2156 | * Take a nap until a decrementer or external or doobell interrupt |
ccc07772 | 2157 | * occurs, with PECE1 and PECE0 set in LPCR. |
66feed61 | 2158 | * On POWER8, set PECEDH, and if we are ceding, also set PECEDP. |
ccc07772 | 2159 | * Also clear the runlatch bit before napping. |
19ccb76a | 2160 | */ |
56548fc0 | 2161 | kvm_do_nap: |
1f09c3ed PM |
2162 | mfspr r0, SPRN_CTRLF |
2163 | clrrdi r0, r0, 1 | |
2164 | mtspr SPRN_CTRLT, r0 | |
582b910e | 2165 | |
f0888f70 PM |
2166 | li r0,1 |
2167 | stb r0,HSTATE_HWTHREAD_REQ(r13) | |
19ccb76a PM |
2168 | mfspr r5,SPRN_LPCR |
2169 | ori r5,r5,LPCR_PECE0 | LPCR_PECE1 | |
aa31e843 | 2170 | BEGIN_FTR_SECTION |
66feed61 | 2171 | ori r5, r5, LPCR_PECEDH |
ccc07772 | 2172 | rlwimi r5, r3, 0, LPCR_PECEDP |
aa31e843 | 2173 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) |
19ccb76a PM |
2174 | mtspr SPRN_LPCR,r5 |
2175 | isync | |
2176 | li r0, 0 | |
2177 | std r0, HSTATE_SCRATCH0(r13) | |
2178 | ptesync | |
2179 | ld r0, HSTATE_SCRATCH0(r13) | |
2180 | 1: cmpd r0, r0 | |
2181 | bne 1b | |
2182 | nap | |
2183 | b . | |
2184 | ||
e3bbbbfa PM |
2185 | 33: mr r4, r3 |
2186 | li r3, 0 | |
2187 | li r12, 0 | |
2188 | b 34f | |
2189 | ||
19ccb76a | 2190 | kvm_end_cede: |
4619ac88 PM |
2191 | /* get vcpu pointer */ |
2192 | ld r4, HSTATE_KVM_VCPU(r13) | |
2193 | ||
19ccb76a PM |
2194 | /* Woken by external or decrementer interrupt */ |
2195 | ld r1, HSTATE_HOST_R1(r13) | |
19ccb76a | 2196 | |
b6c295df PM |
2197 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
2198 | addi r3, r4, VCPU_TB_RMINTR | |
2199 | bl kvmhv_accumulate_time | |
2200 | #endif | |
2201 | ||
19ccb76a PM |
2202 | /* load up FP state */ |
2203 | bl kvmppc_load_fp | |
2204 | ||
fd6d53b1 PM |
2205 | /* Restore guest decrementer */ |
2206 | ld r3, VCPU_DEC_EXPIRES(r4) | |
2207 | ld r5, HSTATE_KVM_VCORE(r13) | |
2208 | ld r6, VCORE_TB_OFFSET(r5) | |
2209 | add r3, r3, r6 /* convert host TB to guest TB value */ | |
2210 | mftb r7 | |
2211 | subf r3, r7, r3 | |
2212 | mtspr SPRN_DEC, r3 | |
2213 | ||
19ccb76a | 2214 | /* Load NV GPRS */ |
c75df6f9 MN |
2215 | ld r14, VCPU_GPR(R14)(r4) |
2216 | ld r15, VCPU_GPR(R15)(r4) | |
2217 | ld r16, VCPU_GPR(R16)(r4) | |
2218 | ld r17, VCPU_GPR(R17)(r4) | |
2219 | ld r18, VCPU_GPR(R18)(r4) | |
2220 | ld r19, VCPU_GPR(R19)(r4) | |
2221 | ld r20, VCPU_GPR(R20)(r4) | |
2222 | ld r21, VCPU_GPR(R21)(r4) | |
2223 | ld r22, VCPU_GPR(R22)(r4) | |
2224 | ld r23, VCPU_GPR(R23)(r4) | |
2225 | ld r24, VCPU_GPR(R24)(r4) | |
2226 | ld r25, VCPU_GPR(R25)(r4) | |
2227 | ld r26, VCPU_GPR(R26)(r4) | |
2228 | ld r27, VCPU_GPR(R27)(r4) | |
2229 | ld r28, VCPU_GPR(R28)(r4) | |
2230 | ld r29, VCPU_GPR(R29)(r4) | |
2231 | ld r30, VCPU_GPR(R30)(r4) | |
2232 | ld r31, VCPU_GPR(R31)(r4) | |
e3bbbbfa PM |
2233 | |
2234 | /* Check the wake reason in SRR1 to see why we got here */ | |
2235 | bl kvmppc_check_wake_reason | |
19ccb76a PM |
2236 | |
2237 | /* clear our bit in vcore->napping_threads */ | |
e3bbbbfa PM |
2238 | 34: ld r5,HSTATE_KVM_VCORE(r13) |
2239 | lbz r7,HSTATE_PTID(r13) | |
19ccb76a | 2240 | li r0,1 |
e3bbbbfa | 2241 | sld r0,r0,r7 |
19ccb76a PM |
2242 | addi r6,r5,VCORE_NAPPING_THREADS |
2243 | 32: lwarx r7,0,r6 | |
2244 | andc r7,r7,r0 | |
2245 | stwcx. r7,0,r6 | |
2246 | bne 32b | |
2247 | li r0,0 | |
2248 | stb r0,HSTATE_NAPPING(r13) | |
2249 | ||
e3bbbbfa PM |
2250 | /* See if the wake reason means we need to exit */ |
2251 | stw r12, VCPU_TRAP(r4) | |
4619ac88 | 2252 | mr r9, r4 |
e3bbbbfa PM |
2253 | cmpdi r3, 0 |
2254 | bgt guest_exit_cont | |
4619ac88 | 2255 | |
19ccb76a PM |
2256 | /* see if any other thread is already exiting */ |
2257 | lwz r0,VCORE_ENTRY_EXIT(r5) | |
2258 | cmpwi r0,0x100 | |
e3bbbbfa | 2259 | bge guest_exit_cont |
19ccb76a | 2260 | |
e3bbbbfa | 2261 | b kvmppc_cede_reentry /* if not go back to guest */ |
19ccb76a PM |
2262 | |
2263 | /* cede when already previously prodded case */ | |
04f995a5 PM |
2264 | kvm_cede_prodded: |
2265 | li r0,0 | |
19ccb76a PM |
2266 | stb r0,VCPU_PRODDED(r3) |
2267 | sync /* order testing prodded vs. clearing ceded */ | |
2268 | stb r0,VCPU_CEDED(r3) | |
2269 | li r3,H_SUCCESS | |
2270 | blr | |
2271 | ||
2272 | /* we've ceded but we want to give control to the host */ | |
04f995a5 | 2273 | kvm_cede_exit: |
6af27c84 PM |
2274 | ld r9, HSTATE_KVM_VCPU(r13) |
2275 | b guest_exit_cont | |
19ccb76a | 2276 | |
b4072df4 PM |
2277 | /* Try to handle a machine check in real mode */ |
2278 | machine_check_realmode: | |
2279 | mr r3, r9 /* get vcpu pointer */ | |
b1576fec | 2280 | bl kvmppc_realmode_machine_check |
b4072df4 | 2281 | nop |
74845bc2 | 2282 | cmpdi r3, 0 /* Did we handle MCE ? */ |
b4072df4 PM |
2283 | ld r9, HSTATE_KVM_VCPU(r13) |
2284 | li r12, BOOK3S_INTERRUPT_MACHINE_CHECK | |
74845bc2 MS |
2285 | /* |
2286 | * Deliver unhandled/fatal (e.g. UE) MCE errors to guest through | |
2287 | * machine check interrupt (set HSRR0 to 0x200). And for handled | |
2288 | * errors (no-fatal), just go back to guest execution with current | |
2289 | * HSRR0 instead of exiting guest. This new approach will inject | |
2290 | * machine check to guest for fatal error causing guest to crash. | |
2291 | * | |
2292 | * The old code used to return to host for unhandled errors which | |
2293 | * was causing guest to hang with soft lockups inside guest and | |
2294 | * makes it difficult to recover guest instance. | |
2295 | */ | |
2296 | ld r10, VCPU_PC(r9) | |
2297 | ld r11, VCPU_MSR(r9) | |
2298 | bne 2f /* Continue guest execution. */ | |
b4072df4 PM |
2299 | /* If not, deliver a machine check. SRR0/1 are already set */ |
2300 | li r10, BOOK3S_INTERRUPT_MACHINE_CHECK | |
000a25dd | 2301 | ld r11, VCPU_MSR(r9) |
e4e38121 | 2302 | bl kvmppc_msr_interrupt |
74845bc2 | 2303 | 2: b fast_interrupt_c_return |
b4072df4 | 2304 | |
e3bbbbfa PM |
2305 | /* |
2306 | * Check the reason we woke from nap, and take appropriate action. | |
1f09c3ed | 2307 | * Returns (in r3): |
e3bbbbfa PM |
2308 | * 0 if nothing needs to be done |
2309 | * 1 if something happened that needs to be handled by the host | |
66feed61 | 2310 | * -1 if there was a guest wakeup (IPI or msgsnd) |
e3bbbbfa PM |
2311 | * |
2312 | * Also sets r12 to the interrupt vector for any interrupt that needs | |
2313 | * to be handled now by the host (0x500 for external interrupt), or zero. | |
1f09c3ed | 2314 | * Modifies r0, r6, r7, r8. |
e3bbbbfa PM |
2315 | */ |
2316 | kvmppc_check_wake_reason: | |
2317 | mfspr r6, SPRN_SRR1 | |
aa31e843 PM |
2318 | BEGIN_FTR_SECTION |
2319 | rlwinm r6, r6, 45-31, 0xf /* extract wake reason field (P8) */ | |
2320 | FTR_SECTION_ELSE | |
2321 | rlwinm r6, r6, 45-31, 0xe /* P7 wake reason field is 3 bits */ | |
2322 | ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_207S) | |
2323 | cmpwi r6, 8 /* was it an external interrupt? */ | |
e3bbbbfa PM |
2324 | li r12, BOOK3S_INTERRUPT_EXTERNAL |
2325 | beq kvmppc_read_intr /* if so, see what it was */ | |
2326 | li r3, 0 | |
2327 | li r12, 0 | |
2328 | cmpwi r6, 6 /* was it the decrementer? */ | |
2329 | beq 0f | |
aa31e843 PM |
2330 | BEGIN_FTR_SECTION |
2331 | cmpwi r6, 5 /* privileged doorbell? */ | |
2332 | beq 0f | |
5d00f66b PM |
2333 | cmpwi r6, 3 /* hypervisor doorbell? */ |
2334 | beq 3f | |
aa31e843 | 2335 | END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) |
e3bbbbfa PM |
2336 | li r3, 1 /* anything else, return 1 */ |
2337 | 0: blr | |
2338 | ||
5d00f66b PM |
2339 | /* hypervisor doorbell */ |
2340 | 3: li r12, BOOK3S_INTERRUPT_H_DOORBELL | |
66feed61 | 2341 | /* see if it's a host IPI */ |
5d00f66b | 2342 | li r3, 1 |
66feed61 PM |
2343 | lbz r0, HSTATE_HOST_IPI(r13) |
2344 | cmpwi r0, 0 | |
2345 | bnelr | |
2346 | /* if not, clear it and return -1 */ | |
2347 | lis r6, (PPC_DBELL_SERVER << (63-36))@h | |
2348 | PPC_MSGCLR(6) | |
2349 | li r3, -1 | |
5d00f66b PM |
2350 | blr |
2351 | ||
c934243c PM |
2352 | /* |
2353 | * Determine what sort of external interrupt is pending (if any). | |
2354 | * Returns: | |
2355 | * 0 if no interrupt is pending | |
2356 | * 1 if an interrupt is pending that needs to be handled by the host | |
2357 | * -1 if there was a guest wakeup IPI (which has now been cleared) | |
1f09c3ed | 2358 | * Modifies r0, r6, r7, r8, returns value in r3. |
c934243c PM |
2359 | */ |
2360 | kvmppc_read_intr: | |
2361 | /* see if a host IPI is pending */ | |
2362 | li r3, 1 | |
2363 | lbz r0, HSTATE_HOST_IPI(r13) | |
2364 | cmpwi r0, 0 | |
2365 | bne 1f | |
371fefd6 | 2366 | |
c934243c PM |
2367 | /* Now read the interrupt from the ICP */ |
2368 | ld r6, HSTATE_XICS_PHYS(r13) | |
19ccb76a | 2369 | li r7, XICS_XIRR |
c934243c PM |
2370 | cmpdi r6, 0 |
2371 | beq- 1f | |
2372 | lwzcix r0, r6, r7 | |
76d072fb AG |
2373 | /* |
2374 | * Save XIRR for later. Since we get in in reverse endian on LE | |
2375 | * systems, save it byte reversed and fetch it back in host endian. | |
2376 | */ | |
2377 | li r3, HSTATE_SAVED_XIRR | |
2378 | STWX_BE r0, r3, r13 | |
2379 | #ifdef __LITTLE_ENDIAN__ | |
2380 | lwz r3, HSTATE_SAVED_XIRR(r13) | |
2381 | #else | |
2382 | mr r3, r0 | |
2383 | #endif | |
2384 | rlwinm. r3, r3, 0, 0xffffff | |
19ccb76a | 2385 | sync |
c934243c | 2386 | beq 1f /* if nothing pending in the ICP */ |
371fefd6 | 2387 | |
c934243c PM |
2388 | /* We found something in the ICP... |
2389 | * | |
2390 | * If it's not an IPI, stash it in the PACA and return to | |
2391 | * the host, we don't (yet) handle directing real external | |
2392 | * interrupts directly to the guest | |
2393 | */ | |
2394 | cmpwi r3, XICS_IPI /* if there is, is it an IPI? */ | |
c934243c | 2395 | bne 42f |
371fefd6 | 2396 | |
c934243c PM |
2397 | /* It's an IPI, clear the MFRR and EOI it */ |
2398 | li r3, 0xff | |
2399 | li r8, XICS_MFRR | |
2400 | stbcix r3, r6, r8 /* clear the IPI */ | |
2401 | stwcix r0, r6, r7 /* EOI it */ | |
2402 | sync | |
f0888f70 | 2403 | |
c934243c PM |
2404 | /* We need to re-check host IPI now in case it got set in the |
2405 | * meantime. If it's clear, we bounce the interrupt to the | |
2406 | * guest | |
2407 | */ | |
2408 | lbz r0, HSTATE_HOST_IPI(r13) | |
2409 | cmpwi r0, 0 | |
2410 | bne- 43f | |
2411 | ||
2412 | /* OK, it's an IPI for us */ | |
6af27c84 | 2413 | li r12, 0 |
c934243c PM |
2414 | li r3, -1 |
2415 | 1: blr | |
2416 | ||
76d072fb AG |
2417 | 42: /* It's not an IPI and it's for the host. We saved a copy of XIRR in |
2418 | * the PACA earlier, it will be picked up by the host ICP driver | |
c934243c | 2419 | */ |
e3bbbbfa | 2420 | li r3, 1 |
c934243c PM |
2421 | b 1b |
2422 | ||
2423 | 43: /* We raced with the host, we need to resend that IPI, bummer */ | |
2424 | li r0, IPI_PRIORITY | |
2425 | stbcix r0, r6, r8 /* set the IPI */ | |
2426 | sync | |
e3bbbbfa | 2427 | li r3, 1 |
c934243c | 2428 | b 1b |
371fefd6 | 2429 | |
de56a948 PM |
2430 | /* |
2431 | * Save away FP, VMX and VSX registers. | |
2432 | * r3 = vcpu pointer | |
595e4f7e PM |
2433 | * N.B. r30 and r31 are volatile across this function, |
2434 | * thus it is not callable from C. | |
a8606e20 | 2435 | */ |
595e4f7e PM |
2436 | kvmppc_save_fp: |
2437 | mflr r30 | |
2438 | mr r31,r3 | |
8943633c PM |
2439 | mfmsr r5 |
2440 | ori r8,r5,MSR_FP | |
de56a948 PM |
2441 | #ifdef CONFIG_ALTIVEC |
2442 | BEGIN_FTR_SECTION | |
2443 | oris r8,r8,MSR_VEC@h | |
2444 | END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) | |
2445 | #endif | |
2446 | #ifdef CONFIG_VSX | |
2447 | BEGIN_FTR_SECTION | |
2448 | oris r8,r8,MSR_VSX@h | |
2449 | END_FTR_SECTION_IFSET(CPU_FTR_VSX) | |
2450 | #endif | |
2451 | mtmsrd r8 | |
595e4f7e | 2452 | addi r3,r3,VCPU_FPRS |
9bf163f8 | 2453 | bl store_fp_state |
de56a948 PM |
2454 | #ifdef CONFIG_ALTIVEC |
2455 | BEGIN_FTR_SECTION | |
595e4f7e | 2456 | addi r3,r31,VCPU_VRS |
9bf163f8 | 2457 | bl store_vr_state |
de56a948 PM |
2458 | END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) |
2459 | #endif | |
2460 | mfspr r6,SPRN_VRSAVE | |
e724f080 | 2461 | stw r6,VCPU_VRSAVE(r31) |
595e4f7e | 2462 | mtlr r30 |
de56a948 PM |
2463 | blr |
2464 | ||
2465 | /* | |
2466 | * Load up FP, VMX and VSX registers | |
2467 | * r4 = vcpu pointer | |
595e4f7e PM |
2468 | * N.B. r30 and r31 are volatile across this function, |
2469 | * thus it is not callable from C. | |
de56a948 | 2470 | */ |
de56a948 | 2471 | kvmppc_load_fp: |
595e4f7e PM |
2472 | mflr r30 |
2473 | mr r31,r4 | |
de56a948 PM |
2474 | mfmsr r9 |
2475 | ori r8,r9,MSR_FP | |
2476 | #ifdef CONFIG_ALTIVEC | |
2477 | BEGIN_FTR_SECTION | |
2478 | oris r8,r8,MSR_VEC@h | |
2479 | END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) | |
2480 | #endif | |
2481 | #ifdef CONFIG_VSX | |
2482 | BEGIN_FTR_SECTION | |
2483 | oris r8,r8,MSR_VSX@h | |
2484 | END_FTR_SECTION_IFSET(CPU_FTR_VSX) | |
2485 | #endif | |
2486 | mtmsrd r8 | |
595e4f7e | 2487 | addi r3,r4,VCPU_FPRS |
9bf163f8 | 2488 | bl load_fp_state |
de56a948 PM |
2489 | #ifdef CONFIG_ALTIVEC |
2490 | BEGIN_FTR_SECTION | |
595e4f7e | 2491 | addi r3,r31,VCPU_VRS |
9bf163f8 | 2492 | bl load_vr_state |
de56a948 PM |
2493 | END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) |
2494 | #endif | |
e724f080 | 2495 | lwz r7,VCPU_VRSAVE(r31) |
de56a948 | 2496 | mtspr SPRN_VRSAVE,r7 |
595e4f7e PM |
2497 | mtlr r30 |
2498 | mr r4,r31 | |
de56a948 | 2499 | blr |
44a3add8 PM |
2500 | |
2501 | /* | |
2502 | * We come here if we get any exception or interrupt while we are | |
2503 | * executing host real mode code while in guest MMU context. | |
2504 | * For now just spin, but we should do something better. | |
2505 | */ | |
2506 | kvmppc_bad_host_intr: | |
2507 | b . | |
e4e38121 MN |
2508 | |
2509 | /* | |
2510 | * This mimics the MSR transition on IRQ delivery. The new guest MSR is taken | |
2511 | * from VCPU_INTR_MSR and is modified based on the required TM state changes. | |
2512 | * r11 has the guest MSR value (in/out) | |
2513 | * r9 has a vcpu pointer (in) | |
2514 | * r0 is used as a scratch register | |
2515 | */ | |
2516 | kvmppc_msr_interrupt: | |
2517 | rldicl r0, r11, 64 - MSR_TS_S_LG, 62 | |
2518 | cmpwi r0, 2 /* Check if we are in transactional state.. */ | |
2519 | ld r11, VCPU_INTR_MSR(r9) | |
2520 | bne 1f | |
2521 | /* ... if transactional, change to suspended */ | |
2522 | li r0, 1 | |
2523 | 1: rldimi r11, r0, MSR_TS_S_LG, 63 - MSR_TS_T_LG | |
2524 | blr | |
9bc01a9b PM |
2525 | |
2526 | /* | |
2527 | * This works around a hardware bug on POWER8E processors, where | |
2528 | * writing a 1 to the MMCR0[PMAO] bit doesn't generate a | |
2529 | * performance monitor interrupt. Instead, when we need to have | |
2530 | * an interrupt pending, we have to arrange for a counter to overflow. | |
2531 | */ | |
2532 | kvmppc_fix_pmao: | |
2533 | li r3, 0 | |
2534 | mtspr SPRN_MMCR2, r3 | |
2535 | lis r3, (MMCR0_PMXE | MMCR0_FCECE)@h | |
2536 | ori r3, r3, MMCR0_PMCjCE | MMCR0_C56RUN | |
2537 | mtspr SPRN_MMCR0, r3 | |
2538 | lis r3, 0x7fff | |
2539 | ori r3, r3, 0xffff | |
2540 | mtspr SPRN_PMC6, r3 | |
2541 | isync | |
2542 | blr | |
b6c295df PM |
2543 | |
2544 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING | |
2545 | /* | |
2546 | * Start timing an activity | |
2547 | * r3 = pointer to time accumulation struct, r4 = vcpu | |
2548 | */ | |
2549 | kvmhv_start_timing: | |
2550 | ld r5, HSTATE_KVM_VCORE(r13) | |
2551 | lbz r6, VCORE_IN_GUEST(r5) | |
2552 | cmpwi r6, 0 | |
2553 | beq 5f /* if in guest, need to */ | |
2554 | ld r6, VCORE_TB_OFFSET(r5) /* subtract timebase offset */ | |
2555 | 5: mftb r5 | |
2556 | subf r5, r6, r5 | |
2557 | std r3, VCPU_CUR_ACTIVITY(r4) | |
2558 | std r5, VCPU_ACTIVITY_START(r4) | |
2559 | blr | |
2560 | ||
2561 | /* | |
2562 | * Accumulate time to one activity and start another. | |
2563 | * r3 = pointer to new time accumulation struct, r4 = vcpu | |
2564 | */ | |
2565 | kvmhv_accumulate_time: | |
2566 | ld r5, HSTATE_KVM_VCORE(r13) | |
2567 | lbz r8, VCORE_IN_GUEST(r5) | |
2568 | cmpwi r8, 0 | |
2569 | beq 4f /* if in guest, need to */ | |
2570 | ld r8, VCORE_TB_OFFSET(r5) /* subtract timebase offset */ | |
2571 | 4: ld r5, VCPU_CUR_ACTIVITY(r4) | |
2572 | ld r6, VCPU_ACTIVITY_START(r4) | |
2573 | std r3, VCPU_CUR_ACTIVITY(r4) | |
2574 | mftb r7 | |
2575 | subf r7, r8, r7 | |
2576 | std r7, VCPU_ACTIVITY_START(r4) | |
2577 | cmpdi r5, 0 | |
2578 | beqlr | |
2579 | subf r3, r6, r7 | |
2580 | ld r8, TAS_SEQCOUNT(r5) | |
2581 | cmpdi r8, 0 | |
2582 | addi r8, r8, 1 | |
2583 | std r8, TAS_SEQCOUNT(r5) | |
2584 | lwsync | |
2585 | ld r7, TAS_TOTAL(r5) | |
2586 | add r7, r7, r3 | |
2587 | std r7, TAS_TOTAL(r5) | |
2588 | ld r6, TAS_MIN(r5) | |
2589 | ld r7, TAS_MAX(r5) | |
2590 | beq 3f | |
2591 | cmpd r3, r6 | |
2592 | bge 1f | |
2593 | 3: std r3, TAS_MIN(r5) | |
2594 | 1: cmpd r3, r7 | |
2595 | ble 2f | |
2596 | std r3, TAS_MAX(r5) | |
2597 | 2: lwsync | |
2598 | addi r8, r8, 1 | |
2599 | std r8, TAS_SEQCOUNT(r5) | |
2600 | blr | |
2601 | #endif |