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1.1 root 1: /*
2: * PowerPC implementation of KVM hooks
3: *
4: * Copyright IBM Corp. 2007
1.1.1.5 root 5: * Copyright (C) 2011 Freescale Semiconductor, Inc.
1.1 root 6: *
7: * Authors:
8: * Jerone Young <[email protected]>
9: * Christian Ehrhardt <[email protected]>
10: * Hollis Blanchard <[email protected]>
11: *
12: * This work is licensed under the terms of the GNU GPL, version 2 or later.
13: * See the COPYING file in the top-level directory.
14: *
15: */
16:
1.1.1.6 ! root 17: #include <dirent.h>
1.1 root 18: #include <sys/types.h>
19: #include <sys/ioctl.h>
20: #include <sys/mman.h>
21:
22: #include <linux/kvm.h>
23:
24: #include "qemu-common.h"
25: #include "qemu-timer.h"
26: #include "sysemu.h"
27: #include "kvm.h"
28: #include "kvm_ppc.h"
29: #include "cpu.h"
30: #include "device_tree.h"
1.1.1.6 ! root 31: #include "hw/sysbus.h"
! 32: #include "hw/spapr.h"
! 33:
! 34: #include "hw/sysbus.h"
! 35: #include "hw/spapr.h"
! 36: #include "hw/spapr_vio.h"
1.1 root 37:
38: //#define DEBUG_KVM
39:
40: #ifdef DEBUG_KVM
41: #define dprintf(fmt, ...) \
42: do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
43: #else
44: #define dprintf(fmt, ...) \
45: do { } while (0)
46: #endif
47:
1.1.1.6 ! root 48: #define PROC_DEVTREE_CPU "/proc/device-tree/cpus/"
! 49:
1.1.1.4 root 50: const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
51: KVM_CAP_LAST_INFO
52: };
53:
54: static int cap_interrupt_unset = false;
55: static int cap_interrupt_level = false;
1.1.1.5 root 56: static int cap_segstate;
57: static int cap_booke_sregs;
1.1.1.6 ! root 58: static int cap_ppc_smt;
! 59: static int cap_ppc_rma;
! 60: static int cap_spapr_tce;
1.1.1.4 root 61:
1.1.1.3 root 62: /* XXX We have a race condition where we actually have a level triggered
63: * interrupt, but the infrastructure can't expose that yet, so the guest
64: * takes but ignores it, goes to sleep and never gets notified that there's
65: * still an interrupt pending.
66: *
67: * As a quick workaround, let's just wake up again 20 ms after we injected
68: * an interrupt. That way we can assure that we're always reinjecting
69: * interrupts in case the guest swallowed them.
70: */
71: static QEMUTimer *idle_timer;
72:
73: static void kvm_kick_env(void *env)
74: {
75: qemu_cpu_kick(env);
76: }
77:
1.1.1.4 root 78: int kvm_arch_init(KVMState *s)
1.1 root 79: {
1.1.1.4 root 80: cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ);
81: cap_interrupt_level = kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL);
1.1.1.5 root 82: cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE);
83: cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS);
1.1.1.6 ! root 84: cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT);
! 85: cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA);
! 86: cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE);
1.1.1.4 root 87:
88: if (!cap_interrupt_level) {
89: fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the "
90: "VM to stall at times!\n");
91: }
92:
1.1 root 93: return 0;
94: }
95:
1.1.1.5 root 96: static int kvm_arch_sync_sregs(CPUState *cenv)
1.1 root 97: {
1.1.1.2 root 98: struct kvm_sregs sregs;
1.1.1.5 root 99: int ret;
100:
101: if (cenv->excp_model == POWERPC_EXCP_BOOKE) {
102: /* What we're really trying to say is "if we're on BookE, we use
103: the native PVR for now". This is the only sane way to check
104: it though, so we potentially confuse users that they can run
105: BookE guests on BookS. Let's hope nobody dares enough :) */
106: return 0;
107: } else {
108: if (!cap_segstate) {
109: fprintf(stderr, "kvm error: missing PVR setting capability\n");
110: return -ENOSYS;
111: }
112: }
113:
114: ret = kvm_vcpu_ioctl(cenv, KVM_GET_SREGS, &sregs);
115: if (ret) {
116: return ret;
117: }
1.1.1.2 root 118:
119: sregs.pvr = cenv->spr[SPR_PVR];
1.1.1.5 root 120: return kvm_vcpu_ioctl(cenv, KVM_SET_SREGS, &sregs);
121: }
1.1.1.2 root 122:
1.1.1.6 ! root 123: /* Set up a shared TLB array with KVM */
! 124: static int kvm_booke206_tlb_init(CPUState *env)
! 125: {
! 126: struct kvm_book3e_206_tlb_params params = {};
! 127: struct kvm_config_tlb cfg = {};
! 128: struct kvm_enable_cap encap = {};
! 129: unsigned int entries = 0;
! 130: int ret, i;
! 131:
! 132: if (!kvm_enabled() ||
! 133: !kvm_check_extension(env->kvm_state, KVM_CAP_SW_TLB)) {
! 134: return 0;
! 135: }
! 136:
! 137: assert(ARRAY_SIZE(params.tlb_sizes) == BOOKE206_MAX_TLBN);
! 138:
! 139: for (i = 0; i < BOOKE206_MAX_TLBN; i++) {
! 140: params.tlb_sizes[i] = booke206_tlb_size(env, i);
! 141: params.tlb_ways[i] = booke206_tlb_ways(env, i);
! 142: entries += params.tlb_sizes[i];
! 143: }
! 144:
! 145: assert(entries == env->nb_tlb);
! 146: assert(sizeof(struct kvm_book3e_206_tlb_entry) == sizeof(ppcmas_tlb_t));
! 147:
! 148: env->tlb_dirty = true;
! 149:
! 150: cfg.array = (uintptr_t)env->tlb.tlbm;
! 151: cfg.array_len = sizeof(ppcmas_tlb_t) * entries;
! 152: cfg.params = (uintptr_t)¶ms;
! 153: cfg.mmu_type = KVM_MMU_FSL_BOOKE_NOHV;
! 154:
! 155: encap.cap = KVM_CAP_SW_TLB;
! 156: encap.args[0] = (uintptr_t)&cfg;
! 157:
! 158: ret = kvm_vcpu_ioctl(env, KVM_ENABLE_CAP, &encap);
! 159: if (ret < 0) {
! 160: fprintf(stderr, "%s: couldn't enable KVM_CAP_SW_TLB: %s\n",
! 161: __func__, strerror(-ret));
! 162: return ret;
! 163: }
! 164:
! 165: env->kvm_sw_tlb = true;
! 166: return 0;
! 167: }
! 168:
1.1.1.5 root 169: int kvm_arch_init_vcpu(CPUState *cenv)
170: {
171: int ret;
172:
173: ret = kvm_arch_sync_sregs(cenv);
174: if (ret) {
175: return ret;
176: }
177:
178: idle_timer = qemu_new_timer_ns(vm_clock, kvm_kick_env, cenv);
1.1.1.3 root 179:
1.1.1.6 ! root 180: /* Some targets support access to KVM's guest TLB. */
! 181: switch (cenv->mmu_model) {
! 182: case POWERPC_MMU_BOOKE206:
! 183: ret = kvm_booke206_tlb_init(cenv);
! 184: break;
! 185: default:
! 186: break;
! 187: }
! 188:
1.1.1.2 root 189: return ret;
190: }
191:
192: void kvm_arch_reset_vcpu(CPUState *env)
193: {
1.1 root 194: }
195:
1.1.1.6 ! root 196: static void kvm_sw_tlb_put(CPUState *env)
! 197: {
! 198: struct kvm_dirty_tlb dirty_tlb;
! 199: unsigned char *bitmap;
! 200: int ret;
! 201:
! 202: if (!env->kvm_sw_tlb) {
! 203: return;
! 204: }
! 205:
! 206: bitmap = g_malloc((env->nb_tlb + 7) / 8);
! 207: memset(bitmap, 0xFF, (env->nb_tlb + 7) / 8);
! 208:
! 209: dirty_tlb.bitmap = (uintptr_t)bitmap;
! 210: dirty_tlb.num_dirty = env->nb_tlb;
! 211:
! 212: ret = kvm_vcpu_ioctl(env, KVM_DIRTY_TLB, &dirty_tlb);
! 213: if (ret) {
! 214: fprintf(stderr, "%s: KVM_DIRTY_TLB: %s\n",
! 215: __func__, strerror(-ret));
! 216: }
! 217:
! 218: g_free(bitmap);
! 219: }
! 220:
1.1.1.3 root 221: int kvm_arch_put_registers(CPUState *env, int level)
1.1 root 222: {
223: struct kvm_regs regs;
224: int ret;
225: int i;
226:
227: ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s);
228: if (ret < 0)
229: return ret;
230:
231: regs.ctr = env->ctr;
232: regs.lr = env->lr;
233: regs.xer = env->xer;
234: regs.msr = env->msr;
235: regs.pc = env->nip;
236:
237: regs.srr0 = env->spr[SPR_SRR0];
238: regs.srr1 = env->spr[SPR_SRR1];
239:
240: regs.sprg0 = env->spr[SPR_SPRG0];
241: regs.sprg1 = env->spr[SPR_SPRG1];
242: regs.sprg2 = env->spr[SPR_SPRG2];
243: regs.sprg3 = env->spr[SPR_SPRG3];
244: regs.sprg4 = env->spr[SPR_SPRG4];
245: regs.sprg5 = env->spr[SPR_SPRG5];
246: regs.sprg6 = env->spr[SPR_SPRG6];
247: regs.sprg7 = env->spr[SPR_SPRG7];
248:
1.1.1.5 root 249: regs.pid = env->spr[SPR_BOOKE_PID];
250:
1.1 root 251: for (i = 0;i < 32; i++)
252: regs.gpr[i] = env->gpr[i];
253:
254: ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s);
255: if (ret < 0)
256: return ret;
257:
1.1.1.6 ! root 258: if (env->tlb_dirty) {
! 259: kvm_sw_tlb_put(env);
! 260: env->tlb_dirty = false;
! 261: }
! 262:
1.1 root 263: return ret;
264: }
265:
266: int kvm_arch_get_registers(CPUState *env)
267: {
268: struct kvm_regs regs;
1.1.1.2 root 269: struct kvm_sregs sregs;
1.1.1.5 root 270: uint32_t cr;
1.1.1.4 root 271: int i, ret;
1.1 root 272:
273: ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s);
274: if (ret < 0)
275: return ret;
276:
1.1.1.5 root 277: cr = regs.cr;
278: for (i = 7; i >= 0; i--) {
279: env->crf[i] = cr & 15;
280: cr >>= 4;
281: }
1.1.1.2 root 282:
1.1 root 283: env->ctr = regs.ctr;
284: env->lr = regs.lr;
285: env->xer = regs.xer;
286: env->msr = regs.msr;
287: env->nip = regs.pc;
288:
289: env->spr[SPR_SRR0] = regs.srr0;
290: env->spr[SPR_SRR1] = regs.srr1;
291:
292: env->spr[SPR_SPRG0] = regs.sprg0;
293: env->spr[SPR_SPRG1] = regs.sprg1;
294: env->spr[SPR_SPRG2] = regs.sprg2;
295: env->spr[SPR_SPRG3] = regs.sprg3;
296: env->spr[SPR_SPRG4] = regs.sprg4;
297: env->spr[SPR_SPRG5] = regs.sprg5;
298: env->spr[SPR_SPRG6] = regs.sprg6;
299: env->spr[SPR_SPRG7] = regs.sprg7;
300:
1.1.1.5 root 301: env->spr[SPR_BOOKE_PID] = regs.pid;
302:
1.1 root 303: for (i = 0;i < 32; i++)
304: env->gpr[i] = regs.gpr[i];
305:
1.1.1.5 root 306: if (cap_booke_sregs) {
307: ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs);
308: if (ret < 0) {
309: return ret;
310: }
311:
312: if (sregs.u.e.features & KVM_SREGS_E_BASE) {
313: env->spr[SPR_BOOKE_CSRR0] = sregs.u.e.csrr0;
314: env->spr[SPR_BOOKE_CSRR1] = sregs.u.e.csrr1;
315: env->spr[SPR_BOOKE_ESR] = sregs.u.e.esr;
316: env->spr[SPR_BOOKE_DEAR] = sregs.u.e.dear;
317: env->spr[SPR_BOOKE_MCSR] = sregs.u.e.mcsr;
318: env->spr[SPR_BOOKE_TSR] = sregs.u.e.tsr;
319: env->spr[SPR_BOOKE_TCR] = sregs.u.e.tcr;
320: env->spr[SPR_DECR] = sregs.u.e.dec;
321: env->spr[SPR_TBL] = sregs.u.e.tb & 0xffffffff;
322: env->spr[SPR_TBU] = sregs.u.e.tb >> 32;
323: env->spr[SPR_VRSAVE] = sregs.u.e.vrsave;
324: }
325:
326: if (sregs.u.e.features & KVM_SREGS_E_ARCH206) {
327: env->spr[SPR_BOOKE_PIR] = sregs.u.e.pir;
328: env->spr[SPR_BOOKE_MCSRR0] = sregs.u.e.mcsrr0;
329: env->spr[SPR_BOOKE_MCSRR1] = sregs.u.e.mcsrr1;
330: env->spr[SPR_BOOKE_DECAR] = sregs.u.e.decar;
331: env->spr[SPR_BOOKE_IVPR] = sregs.u.e.ivpr;
332: }
333:
334: if (sregs.u.e.features & KVM_SREGS_E_64) {
335: env->spr[SPR_BOOKE_EPCR] = sregs.u.e.epcr;
336: }
337:
338: if (sregs.u.e.features & KVM_SREGS_E_SPRG8) {
339: env->spr[SPR_BOOKE_SPRG8] = sregs.u.e.sprg8;
340: }
341:
342: if (sregs.u.e.features & KVM_SREGS_E_IVOR) {
343: env->spr[SPR_BOOKE_IVOR0] = sregs.u.e.ivor_low[0];
344: env->spr[SPR_BOOKE_IVOR1] = sregs.u.e.ivor_low[1];
345: env->spr[SPR_BOOKE_IVOR2] = sregs.u.e.ivor_low[2];
346: env->spr[SPR_BOOKE_IVOR3] = sregs.u.e.ivor_low[3];
347: env->spr[SPR_BOOKE_IVOR4] = sregs.u.e.ivor_low[4];
348: env->spr[SPR_BOOKE_IVOR5] = sregs.u.e.ivor_low[5];
349: env->spr[SPR_BOOKE_IVOR6] = sregs.u.e.ivor_low[6];
350: env->spr[SPR_BOOKE_IVOR7] = sregs.u.e.ivor_low[7];
351: env->spr[SPR_BOOKE_IVOR8] = sregs.u.e.ivor_low[8];
352: env->spr[SPR_BOOKE_IVOR9] = sregs.u.e.ivor_low[9];
353: env->spr[SPR_BOOKE_IVOR10] = sregs.u.e.ivor_low[10];
354: env->spr[SPR_BOOKE_IVOR11] = sregs.u.e.ivor_low[11];
355: env->spr[SPR_BOOKE_IVOR12] = sregs.u.e.ivor_low[12];
356: env->spr[SPR_BOOKE_IVOR13] = sregs.u.e.ivor_low[13];
357: env->spr[SPR_BOOKE_IVOR14] = sregs.u.e.ivor_low[14];
358: env->spr[SPR_BOOKE_IVOR15] = sregs.u.e.ivor_low[15];
359:
360: if (sregs.u.e.features & KVM_SREGS_E_SPE) {
361: env->spr[SPR_BOOKE_IVOR32] = sregs.u.e.ivor_high[0];
362: env->spr[SPR_BOOKE_IVOR33] = sregs.u.e.ivor_high[1];
363: env->spr[SPR_BOOKE_IVOR34] = sregs.u.e.ivor_high[2];
364: }
365:
366: if (sregs.u.e.features & KVM_SREGS_E_PM) {
367: env->spr[SPR_BOOKE_IVOR35] = sregs.u.e.ivor_high[3];
368: }
369:
370: if (sregs.u.e.features & KVM_SREGS_E_PC) {
371: env->spr[SPR_BOOKE_IVOR36] = sregs.u.e.ivor_high[4];
372: env->spr[SPR_BOOKE_IVOR37] = sregs.u.e.ivor_high[5];
373: }
374: }
375:
376: if (sregs.u.e.features & KVM_SREGS_E_ARCH206_MMU) {
377: env->spr[SPR_BOOKE_MAS0] = sregs.u.e.mas0;
378: env->spr[SPR_BOOKE_MAS1] = sregs.u.e.mas1;
379: env->spr[SPR_BOOKE_MAS2] = sregs.u.e.mas2;
380: env->spr[SPR_BOOKE_MAS3] = sregs.u.e.mas7_3 & 0xffffffff;
381: env->spr[SPR_BOOKE_MAS4] = sregs.u.e.mas4;
382: env->spr[SPR_BOOKE_MAS6] = sregs.u.e.mas6;
383: env->spr[SPR_BOOKE_MAS7] = sregs.u.e.mas7_3 >> 32;
384: env->spr[SPR_MMUCFG] = sregs.u.e.mmucfg;
385: env->spr[SPR_BOOKE_TLB0CFG] = sregs.u.e.tlbcfg[0];
386: env->spr[SPR_BOOKE_TLB1CFG] = sregs.u.e.tlbcfg[1];
387: }
388:
389: if (sregs.u.e.features & KVM_SREGS_EXP) {
390: env->spr[SPR_BOOKE_EPR] = sregs.u.e.epr;
391: }
392:
393: if (sregs.u.e.features & KVM_SREGS_E_PD) {
394: env->spr[SPR_BOOKE_EPLC] = sregs.u.e.eplc;
395: env->spr[SPR_BOOKE_EPSC] = sregs.u.e.epsc;
396: }
397:
398: if (sregs.u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
399: env->spr[SPR_E500_SVR] = sregs.u.e.impl.fsl.svr;
400: env->spr[SPR_Exxx_MCAR] = sregs.u.e.impl.fsl.mcar;
401: env->spr[SPR_HID0] = sregs.u.e.impl.fsl.hid0;
402:
403: if (sregs.u.e.impl.fsl.features & KVM_SREGS_E_FSL_PIDn) {
404: env->spr[SPR_BOOKE_PID1] = sregs.u.e.impl.fsl.pid1;
405: env->spr[SPR_BOOKE_PID2] = sregs.u.e.impl.fsl.pid2;
406: }
407: }
408: }
409:
410: if (cap_segstate) {
411: ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs);
412: if (ret < 0) {
413: return ret;
414: }
415:
416: ppc_store_sdr1(env, sregs.u.s.sdr1);
1.1.1.2 root 417:
418: /* Sync SLB */
419: #ifdef TARGET_PPC64
420: for (i = 0; i < 64; i++) {
421: ppc_store_slb(env, sregs.u.s.ppc64.slb[i].slbe,
422: sregs.u.s.ppc64.slb[i].slbv);
423: }
424: #endif
425:
426: /* Sync SRs */
427: for (i = 0; i < 16; i++) {
428: env->sr[i] = sregs.u.s.ppc32.sr[i];
429: }
430:
431: /* Sync BATs */
432: for (i = 0; i < 8; i++) {
433: env->DBAT[0][i] = sregs.u.s.ppc32.dbat[i] & 0xffffffff;
434: env->DBAT[1][i] = sregs.u.s.ppc32.dbat[i] >> 32;
435: env->IBAT[0][i] = sregs.u.s.ppc32.ibat[i] & 0xffffffff;
436: env->IBAT[1][i] = sregs.u.s.ppc32.ibat[i] >> 32;
437: }
438: }
439:
1.1 root 440: return 0;
441: }
442:
1.1.1.4 root 443: int kvmppc_set_interrupt(CPUState *env, int irq, int level)
444: {
445: unsigned virq = level ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET;
446:
447: if (irq != PPC_INTERRUPT_EXT) {
448: return 0;
449: }
450:
451: if (!kvm_enabled() || !cap_interrupt_unset || !cap_interrupt_level) {
452: return 0;
453: }
454:
455: kvm_vcpu_ioctl(env, KVM_INTERRUPT, &virq);
456:
457: return 0;
458: }
459:
1.1.1.2 root 460: #if defined(TARGET_PPCEMB)
461: #define PPC_INPUT_INT PPC40x_INPUT_INT
462: #elif defined(TARGET_PPC64)
463: #define PPC_INPUT_INT PPC970_INPUT_INT
464: #else
465: #define PPC_INPUT_INT PPC6xx_INPUT_INT
466: #endif
467:
1.1.1.5 root 468: void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
1.1 root 469: {
470: int r;
471: unsigned irq;
472:
473: /* PowerPC Qemu tracks the various core input pins (interrupt, critical
474: * interrupt, reset, etc) in PPC-specific env->irq_input_state. */
1.1.1.4 root 475: if (!cap_interrupt_level &&
476: run->ready_for_interrupt_injection &&
1.1 root 477: (env->interrupt_request & CPU_INTERRUPT_HARD) &&
1.1.1.2 root 478: (env->irq_input_state & (1<<PPC_INPUT_INT)))
1.1 root 479: {
480: /* For now KVM disregards the 'irq' argument. However, in the
481: * future KVM could cache it in-kernel to avoid a heavyweight exit
482: * when reading the UIC.
483: */
1.1.1.4 root 484: irq = KVM_INTERRUPT_SET;
1.1 root 485:
486: dprintf("injected interrupt %d\n", irq);
487: r = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &irq);
488: if (r < 0)
489: printf("cpu %d fail inject %x\n", env->cpu_index, irq);
1.1.1.3 root 490:
491: /* Always wake up soon in case the interrupt was level based */
1.1.1.5 root 492: qemu_mod_timer(idle_timer, qemu_get_clock_ns(vm_clock) +
1.1.1.3 root 493: (get_ticks_per_sec() / 50));
1.1 root 494: }
495:
496: /* We don't know if there are more interrupts pending after this. However,
497: * the guest will return to userspace in the course of handling this one
498: * anyways, so we will get a chance to deliver the rest. */
499: }
500:
1.1.1.5 root 501: void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
1.1 root 502: {
503: }
504:
1.1.1.5 root 505: int kvm_arch_process_async_events(CPUState *env)
1.1.1.3 root 506: {
1.1.1.6 ! root 507: return env->halted;
1.1.1.3 root 508: }
509:
1.1 root 510: static int kvmppc_handle_halt(CPUState *env)
511: {
512: if (!(env->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) {
513: env->halted = 1;
514: env->exception_index = EXCP_HLT;
515: }
516:
1.1.1.5 root 517: return 0;
1.1 root 518: }
519:
520: /* map dcr access to existing qemu dcr emulation */
521: static int kvmppc_handle_dcr_read(CPUState *env, uint32_t dcrn, uint32_t *data)
522: {
523: if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0)
524: fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn);
525:
1.1.1.5 root 526: return 0;
1.1 root 527: }
528:
529: static int kvmppc_handle_dcr_write(CPUState *env, uint32_t dcrn, uint32_t data)
530: {
531: if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0)
532: fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn);
533:
1.1.1.5 root 534: return 0;
1.1 root 535: }
536:
537: int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
538: {
1.1.1.5 root 539: int ret;
1.1 root 540:
541: switch (run->exit_reason) {
542: case KVM_EXIT_DCR:
543: if (run->dcr.is_write) {
544: dprintf("handle dcr write\n");
545: ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data);
546: } else {
547: dprintf("handle dcr read\n");
548: ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data);
549: }
550: break;
551: case KVM_EXIT_HLT:
552: dprintf("handle halt\n");
553: ret = kvmppc_handle_halt(env);
554: break;
1.1.1.6 ! root 555: #ifdef CONFIG_PSERIES
! 556: case KVM_EXIT_PAPR_HCALL:
! 557: dprintf("handle PAPR hypercall\n");
! 558: run->papr_hcall.ret = spapr_hypercall(env, run->papr_hcall.nr,
! 559: run->papr_hcall.args);
! 560: ret = 1;
! 561: break;
! 562: #endif
1.1.1.4 root 563: default:
564: fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
565: ret = -1;
566: break;
1.1 root 567: }
568:
569: return ret;
570: }
571:
1.1.1.3 root 572: static int read_cpuinfo(const char *field, char *value, int len)
573: {
574: FILE *f;
575: int ret = -1;
576: int field_len = strlen(field);
577: char line[512];
578:
579: f = fopen("/proc/cpuinfo", "r");
580: if (!f) {
581: return -1;
582: }
583:
584: do {
585: if(!fgets(line, sizeof(line), f)) {
586: break;
587: }
588: if (!strncmp(line, field, field_len)) {
589: strncpy(value, line, len);
590: ret = 0;
591: break;
592: }
593: } while(*line);
594:
595: fclose(f);
596:
597: return ret;
598: }
599:
600: uint32_t kvmppc_get_tbfreq(void)
601: {
602: char line[512];
603: char *ns;
604: uint32_t retval = get_ticks_per_sec();
605:
606: if (read_cpuinfo("timebase", line, sizeof(line))) {
607: return retval;
608: }
609:
610: if (!(ns = strchr(line, ':'))) {
611: return retval;
612: }
613:
614: ns++;
615:
616: retval = atoi(ns);
617: return retval;
618: }
619:
1.1.1.6 ! root 620: /* Try to find a device tree node for a CPU with clock-frequency property */
! 621: static int kvmppc_find_cpu_dt(char *buf, int buf_len)
! 622: {
! 623: struct dirent *dirp;
! 624: DIR *dp;
! 625:
! 626: if ((dp = opendir(PROC_DEVTREE_CPU)) == NULL) {
! 627: printf("Can't open directory " PROC_DEVTREE_CPU "\n");
! 628: return -1;
! 629: }
! 630:
! 631: buf[0] = '\0';
! 632: while ((dirp = readdir(dp)) != NULL) {
! 633: FILE *f;
! 634: snprintf(buf, buf_len, "%s%s/clock-frequency", PROC_DEVTREE_CPU,
! 635: dirp->d_name);
! 636: f = fopen(buf, "r");
! 637: if (f) {
! 638: snprintf(buf, buf_len, "%s%s", PROC_DEVTREE_CPU, dirp->d_name);
! 639: fclose(f);
! 640: break;
! 641: }
! 642: buf[0] = '\0';
! 643: }
! 644: closedir(dp);
! 645: if (buf[0] == '\0') {
! 646: printf("Unknown host!\n");
! 647: return -1;
! 648: }
! 649:
! 650: return 0;
! 651: }
! 652:
! 653: /* Read a CPU node property from the host device tree that's a single
! 654: * integer (32-bit or 64-bit). Returns 0 if anything goes wrong
! 655: * (can't find or open the property, or doesn't understand the
! 656: * format) */
! 657: static uint64_t kvmppc_read_int_cpu_dt(const char *propname)
! 658: {
! 659: char buf[PATH_MAX];
! 660: union {
! 661: uint32_t v32;
! 662: uint64_t v64;
! 663: } u;
! 664: FILE *f;
! 665: int len;
! 666:
! 667: if (kvmppc_find_cpu_dt(buf, sizeof(buf))) {
! 668: return -1;
! 669: }
! 670:
! 671: strncat(buf, "/", sizeof(buf) - strlen(buf));
! 672: strncat(buf, propname, sizeof(buf) - strlen(buf));
! 673:
! 674: f = fopen(buf, "rb");
! 675: if (!f) {
! 676: return -1;
! 677: }
! 678:
! 679: len = fread(&u, 1, sizeof(u), f);
! 680: fclose(f);
! 681: switch (len) {
! 682: case 4:
! 683: /* property is a 32-bit quantity */
! 684: return be32_to_cpu(u.v32);
! 685: case 8:
! 686: return be64_to_cpu(u.v64);
! 687: }
! 688:
! 689: return 0;
! 690: }
! 691:
! 692: uint64_t kvmppc_get_clockfreq(void)
! 693: {
! 694: return kvmppc_read_int_cpu_dt("clock-frequency");
! 695: }
! 696:
! 697: uint32_t kvmppc_get_vmx(void)
! 698: {
! 699: return kvmppc_read_int_cpu_dt("ibm,vmx");
! 700: }
! 701:
! 702: uint32_t kvmppc_get_dfp(void)
! 703: {
! 704: return kvmppc_read_int_cpu_dt("ibm,dfp");
! 705: }
! 706:
1.1.1.4 root 707: int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len)
708: {
709: uint32_t *hc = (uint32_t*)buf;
710:
711: struct kvm_ppc_pvinfo pvinfo;
712:
713: if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_PVINFO) &&
714: !kvm_vm_ioctl(env->kvm_state, KVM_PPC_GET_PVINFO, &pvinfo)) {
715: memcpy(buf, pvinfo.hcall, buf_len);
716:
717: return 0;
718: }
719:
720: /*
721: * Fallback to always fail hypercalls:
722: *
723: * li r3, -1
724: * nop
725: * nop
726: * nop
727: */
728:
729: hc[0] = 0x3860ffff;
730: hc[1] = 0x60000000;
731: hc[2] = 0x60000000;
732: hc[3] = 0x60000000;
733:
734: return 0;
735: }
736:
1.1.1.6 ! root 737: void kvmppc_set_papr(CPUState *env)
! 738: {
! 739: struct kvm_enable_cap cap = {};
! 740: struct kvm_one_reg reg = {};
! 741: struct kvm_sregs sregs = {};
! 742: int ret;
! 743:
! 744: cap.cap = KVM_CAP_PPC_PAPR;
! 745: ret = kvm_vcpu_ioctl(env, KVM_ENABLE_CAP, &cap);
! 746:
! 747: if (ret) {
! 748: goto fail;
! 749: }
! 750:
! 751: /*
! 752: * XXX We set HIOR here. It really should be a qdev property of
! 753: * the CPU node, but we don't have CPUs converted to qdev yet.
! 754: *
! 755: * Once we have qdev CPUs, move HIOR to a qdev property and
! 756: * remove this chunk.
! 757: */
! 758: reg.id = KVM_ONE_REG_PPC_HIOR;
! 759: reg.u.reg64 = env->spr[SPR_HIOR];
! 760: ret = kvm_vcpu_ioctl(env, KVM_SET_ONE_REG, ®);
! 761: if (ret) {
! 762: goto fail;
! 763: }
! 764:
! 765: /* Set SDR1 so kernel space finds the HTAB */
! 766: ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs);
! 767: if (ret) {
! 768: goto fail;
! 769: }
! 770:
! 771: sregs.u.s.sdr1 = env->spr[SPR_SDR1];
! 772:
! 773: ret = kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs);
! 774: if (ret) {
! 775: goto fail;
! 776: }
! 777:
! 778: return;
! 779:
! 780: fail:
! 781: cpu_abort(env, "This KVM version does not support PAPR\n");
! 782: }
! 783:
! 784: int kvmppc_smt_threads(void)
! 785: {
! 786: return cap_ppc_smt ? cap_ppc_smt : 1;
! 787: }
! 788:
! 789: off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
! 790: {
! 791: void *rma;
! 792: off_t size;
! 793: int fd;
! 794: struct kvm_allocate_rma ret;
! 795: MemoryRegion *rma_region;
! 796:
! 797: /* If cap_ppc_rma == 0, contiguous RMA allocation is not supported
! 798: * if cap_ppc_rma == 1, contiguous RMA allocation is supported, but
! 799: * not necessary on this hardware
! 800: * if cap_ppc_rma == 2, contiguous RMA allocation is needed on this hardware
! 801: *
! 802: * FIXME: We should allow the user to force contiguous RMA
! 803: * allocation in the cap_ppc_rma==1 case.
! 804: */
! 805: if (cap_ppc_rma < 2) {
! 806: return 0;
! 807: }
! 808:
! 809: fd = kvm_vm_ioctl(kvm_state, KVM_ALLOCATE_RMA, &ret);
! 810: if (fd < 0) {
! 811: fprintf(stderr, "KVM: Error on KVM_ALLOCATE_RMA: %s\n",
! 812: strerror(errno));
! 813: return -1;
! 814: }
! 815:
! 816: size = MIN(ret.rma_size, 256ul << 20);
! 817:
! 818: rma = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
! 819: if (rma == MAP_FAILED) {
! 820: fprintf(stderr, "KVM: Error mapping RMA: %s\n", strerror(errno));
! 821: return -1;
! 822: };
! 823:
! 824: rma_region = g_new(MemoryRegion, 1);
! 825: memory_region_init_ram_ptr(rma_region, NULL, name, size, rma);
! 826: memory_region_add_subregion(sysmem, 0, rma_region);
! 827:
! 828: return size;
! 829: }
! 830:
! 831: void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd)
! 832: {
! 833: struct kvm_create_spapr_tce args = {
! 834: .liobn = liobn,
! 835: .window_size = window_size,
! 836: };
! 837: long len;
! 838: int fd;
! 839: void *table;
! 840:
! 841: /* Must set fd to -1 so we don't try to munmap when called for
! 842: * destroying the table, which the upper layers -will- do
! 843: */
! 844: *pfd = -1;
! 845: if (!cap_spapr_tce) {
! 846: return NULL;
! 847: }
! 848:
! 849: fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE, &args);
! 850: if (fd < 0) {
! 851: fprintf(stderr, "KVM: Failed to create TCE table for liobn 0x%x\n",
! 852: liobn);
! 853: return NULL;
! 854: }
! 855:
! 856: len = (window_size / SPAPR_VIO_TCE_PAGE_SIZE) * sizeof(VIOsPAPR_RTCE);
! 857: /* FIXME: round this up to page size */
! 858:
! 859: table = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
! 860: if (table == MAP_FAILED) {
! 861: fprintf(stderr, "KVM: Failed to map TCE table for liobn 0x%x\n",
! 862: liobn);
! 863: close(fd);
! 864: return NULL;
! 865: }
! 866:
! 867: *pfd = fd;
! 868: return table;
! 869: }
! 870:
! 871: int kvmppc_remove_spapr_tce(void *table, int fd, uint32_t window_size)
! 872: {
! 873: long len;
! 874:
! 875: if (fd < 0) {
! 876: return -1;
! 877: }
! 878:
! 879: len = (window_size / SPAPR_VIO_TCE_PAGE_SIZE)*sizeof(VIOsPAPR_RTCE);
! 880: if ((munmap(table, len) < 0) ||
! 881: (close(fd) < 0)) {
! 882: fprintf(stderr, "KVM: Unexpected error removing TCE table: %s",
! 883: strerror(errno));
! 884: /* Leak the table */
! 885: }
! 886:
! 887: return 0;
! 888: }
! 889:
! 890: static inline uint32_t mfpvr(void)
! 891: {
! 892: uint32_t pvr;
! 893:
! 894: asm ("mfpvr %0"
! 895: : "=r"(pvr));
! 896: return pvr;
! 897: }
! 898:
! 899: static void alter_insns(uint64_t *word, uint64_t flags, bool on)
! 900: {
! 901: if (on) {
! 902: *word |= flags;
! 903: } else {
! 904: *word &= ~flags;
! 905: }
! 906: }
! 907:
! 908: const ppc_def_t *kvmppc_host_cpu_def(void)
! 909: {
! 910: uint32_t host_pvr = mfpvr();
! 911: const ppc_def_t *base_spec;
! 912: ppc_def_t *spec;
! 913: uint32_t vmx = kvmppc_get_vmx();
! 914: uint32_t dfp = kvmppc_get_dfp();
! 915:
! 916: base_spec = ppc_find_by_pvr(host_pvr);
! 917:
! 918: spec = g_malloc0(sizeof(*spec));
! 919: memcpy(spec, base_spec, sizeof(*spec));
! 920:
! 921: /* Now fix up the spec with information we can query from the host */
! 922:
! 923: if (vmx != -1) {
! 924: /* Only override when we know what the host supports */
! 925: alter_insns(&spec->insns_flags, PPC_ALTIVEC, vmx > 0);
! 926: alter_insns(&spec->insns_flags2, PPC2_VSX, vmx > 1);
! 927: }
! 928: if (dfp != -1) {
! 929: /* Only override when we know what the host supports */
! 930: alter_insns(&spec->insns_flags2, PPC2_DFP, dfp);
! 931: }
! 932:
! 933: return spec;
! 934: }
! 935:
1.1.1.3 root 936: bool kvm_arch_stop_on_emulation_error(CPUState *env)
937: {
938: return true;
939: }
1.1.1.5 root 940:
941: int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
942: {
943: return 1;
944: }
945:
946: int kvm_arch_on_sigbus(int code, void *addr)
947: {
948: return 1;
949: }
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