summaryrefslogtreecommitdiff
path: root/arch/powerpc/kvm/book3s_64_emulate.c
blob: 2b0ee7e040c90d7870851ae46d564b1e17451ad7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright SUSE Linux Products GmbH 2009
 *
 * Authors: Alexander Graf <agraf@suse.de>
 */

#include <asm/kvm_ppc.h>
#include <asm/disassemble.h>
#include <asm/kvm_book3s.h>
#include <asm/reg.h>

#define OP_19_XOP_RFID		18
#define OP_19_XOP_RFI		50

#define OP_31_XOP_MFMSR		83
#define OP_31_XOP_MTMSR		146
#define OP_31_XOP_MTMSRD	178
#define OP_31_XOP_MTSRIN	242
#define OP_31_XOP_TLBIEL	274
#define OP_31_XOP_TLBIE		306
#define OP_31_XOP_SLBMTE	402
#define OP_31_XOP_SLBIE		434
#define OP_31_XOP_SLBIA		498
#define OP_31_XOP_MFSRIN	659
#define OP_31_XOP_SLBMFEV	851
#define OP_31_XOP_EIOIO		854
#define OP_31_XOP_SLBMFEE	915

/* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
#define OP_31_XOP_DCBZ		1010

int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
                           unsigned int inst, int *advance)
{
	int emulated = EMULATE_DONE;

	switch (get_op(inst)) {
	case 19:
		switch (get_xop(inst)) {
		case OP_19_XOP_RFID:
		case OP_19_XOP_RFI:
			vcpu->arch.pc = vcpu->arch.srr0;
			kvmppc_set_msr(vcpu, vcpu->arch.srr1);
			*advance = 0;
			break;

		default:
			emulated = EMULATE_FAIL;
			break;
		}
		break;
	case 31:
		switch (get_xop(inst)) {
		case OP_31_XOP_MFMSR:
			kvmppc_set_gpr(vcpu, get_rt(inst), vcpu->arch.msr);
			break;
		case OP_31_XOP_MTMSRD:
		{
			ulong rs = kvmppc_get_gpr(vcpu, get_rs(inst));
			if (inst & 0x10000) {
				vcpu->arch.msr &= ~(MSR_RI | MSR_EE);
				vcpu->arch.msr |= rs & (MSR_RI | MSR_EE);
			} else
				kvmppc_set_msr(vcpu, rs);
			break;
		}
		case OP_31_XOP_MTMSR:
			kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, get_rs(inst)));
			break;
		case OP_31_XOP_MFSRIN:
		{
			int srnum;

			srnum = (kvmppc_get_gpr(vcpu, get_rb(inst)) >> 28) & 0xf;
			if (vcpu->arch.mmu.mfsrin) {
				u32 sr;
				sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
				kvmppc_set_gpr(vcpu, get_rt(inst), sr);
			}
			break;
		}
		case OP_31_XOP_MTSRIN:
			vcpu->arch.mmu.mtsrin(vcpu,
				(kvmppc_get_gpr(vcpu, get_rb(inst)) >> 28) & 0xf,
				kvmppc_get_gpr(vcpu, get_rs(inst)));
			break;
		case OP_31_XOP_TLBIE:
		case OP_31_XOP_TLBIEL:
		{
			bool large = (inst & 0x00200000) ? true : false;
			ulong addr = kvmppc_get_gpr(vcpu, get_rb(inst));
			vcpu->arch.mmu.tlbie(vcpu, addr, large);
			break;
		}
		case OP_31_XOP_EIOIO:
			break;
		case OP_31_XOP_SLBMTE:
			if (!vcpu->arch.mmu.slbmte)
				return EMULATE_FAIL;

			vcpu->arch.mmu.slbmte(vcpu,
					kvmppc_get_gpr(vcpu, get_rs(inst)),
					kvmppc_get_gpr(vcpu, get_rb(inst)));
			break;
		case OP_31_XOP_SLBIE:
			if (!vcpu->arch.mmu.slbie)
				return EMULATE_FAIL;

			vcpu->arch.mmu.slbie(vcpu,
					kvmppc_get_gpr(vcpu, get_rb(inst)));
			break;
		case OP_31_XOP_SLBIA:
			if (!vcpu->arch.mmu.slbia)
				return EMULATE_FAIL;

			vcpu->arch.mmu.slbia(vcpu);
			break;
		case OP_31_XOP_SLBMFEE:
			if (!vcpu->arch.mmu.slbmfee) {
				emulated = EMULATE_FAIL;
			} else {
				ulong t, rb;

				rb = kvmppc_get_gpr(vcpu, get_rb(inst));
				t = vcpu->arch.mmu.slbmfee(vcpu, rb);
				kvmppc_set_gpr(vcpu, get_rt(inst), t);
			}
			break;
		case OP_31_XOP_SLBMFEV:
			if (!vcpu->arch.mmu.slbmfev) {
				emulated = EMULATE_FAIL;
			} else {
				ulong t, rb;

				rb = kvmppc_get_gpr(vcpu, get_rb(inst));
				t = vcpu->arch.mmu.slbmfev(vcpu, rb);
				kvmppc_set_gpr(vcpu, get_rt(inst), t);
			}
			break;
		case OP_31_XOP_DCBZ:
		{
			ulong rb = kvmppc_get_gpr(vcpu, get_rb(inst));
			ulong ra = 0;
			ulong addr;
			u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

			if (get_ra(inst))
				ra = kvmppc_get_gpr(vcpu, get_ra(inst));

			addr = (ra + rb) & ~31ULL;
			if (!(vcpu->arch.msr & MSR_SF))
				addr &= 0xffffffff;

			if (kvmppc_st(vcpu, addr, 32, zeros)) {
				vcpu->arch.dear = addr;
				vcpu->arch.fault_dear = addr;
				to_book3s(vcpu)->dsisr = DSISR_PROTFAULT |
						      DSISR_ISSTORE;
				kvmppc_book3s_queue_irqprio(vcpu,
					BOOK3S_INTERRUPT_DATA_STORAGE);
				kvmppc_mmu_pte_flush(vcpu, addr, ~0xFFFULL);
			}

			break;
		}
		default:
			emulated = EMULATE_FAIL;
		}
		break;
	default:
		emulated = EMULATE_FAIL;
	}

	return emulated;
}

void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
                    u32 val)
{
	if (upper) {
		/* Upper BAT */
		u32 bl = (val >> 2) & 0x7ff;
		bat->bepi_mask = (~bl << 17);
		bat->bepi = val & 0xfffe0000;
		bat->vs = (val & 2) ? 1 : 0;
		bat->vp = (val & 1) ? 1 : 0;
		bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
	} else {
		/* Lower BAT */
		bat->brpn = val & 0xfffe0000;
		bat->wimg = (val >> 3) & 0xf;
		bat->pp = val & 3;
		bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
	}
}

static void kvmppc_write_bat(struct kvm_vcpu *vcpu, int sprn, u32 val)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	struct kvmppc_bat *bat;

	switch (sprn) {
	case SPRN_IBAT0U ... SPRN_IBAT3L:
		bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
		break;
	case SPRN_IBAT4U ... SPRN_IBAT7L:
		bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT4U) / 2];
		break;
	case SPRN_DBAT0U ... SPRN_DBAT3L:
		bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
		break;
	case SPRN_DBAT4U ... SPRN_DBAT7L:
		bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT4U) / 2];
		break;
	default:
		BUG();
	}

	kvmppc_set_bat(vcpu, bat, !(sprn % 2), val);
}

int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
{
	int emulated = EMULATE_DONE;
	ulong spr_val = kvmppc_get_gpr(vcpu, rs);

	switch (sprn) {
	case SPRN_SDR1:
		to_book3s(vcpu)->sdr1 = spr_val;
		break;
	case SPRN_DSISR:
		to_book3s(vcpu)->dsisr = spr_val;
		break;
	case SPRN_DAR:
		vcpu->arch.dear = spr_val;
		break;
	case SPRN_HIOR:
		to_book3s(vcpu)->hior = spr_val;
		break;
	case SPRN_IBAT0U ... SPRN_IBAT3L:
	case SPRN_IBAT4U ... SPRN_IBAT7L:
	case SPRN_DBAT0U ... SPRN_DBAT3L:
	case SPRN_DBAT4U ... SPRN_DBAT7L:
		kvmppc_write_bat(vcpu, sprn, (u32)spr_val);
		/* BAT writes happen so rarely that we're ok to flush
		 * everything here */
		kvmppc_mmu_pte_flush(vcpu, 0, 0);
		break;
	case SPRN_HID0:
		to_book3s(vcpu)->hid[0] = spr_val;
		break;
	case SPRN_HID1:
		to_book3s(vcpu)->hid[1] = spr_val;
		break;
	case SPRN_HID2:
		to_book3s(vcpu)->hid[2] = spr_val;
		break;
	case SPRN_HID4:
		to_book3s(vcpu)->hid[4] = spr_val;
		break;
	case SPRN_HID5:
		to_book3s(vcpu)->hid[5] = spr_val;
		/* guest HID5 set can change is_dcbz32 */
		if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
		    (mfmsr() & MSR_HV))
			vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
		break;
	case SPRN_ICTC:
	case SPRN_THRM1:
	case SPRN_THRM2:
	case SPRN_THRM3:
	case SPRN_CTRLF:
	case SPRN_CTRLT:
		break;
	default:
		printk(KERN_INFO "KVM: invalid SPR write: %d\n", sprn);
#ifndef DEBUG_SPR
		emulated = EMULATE_FAIL;
#endif
		break;
	}

	return emulated;
}

int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
{
	int emulated = EMULATE_DONE;

	switch (sprn) {
	case SPRN_SDR1:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->sdr1);
		break;
	case SPRN_DSISR:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->dsisr);
		break;
	case SPRN_DAR:
		kvmppc_set_gpr(vcpu, rt, vcpu->arch.dear);
		break;
	case SPRN_HIOR:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hior);
		break;
	case SPRN_HID0:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[0]);
		break;
	case SPRN_HID1:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[1]);
		break;
	case SPRN_HID2:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[2]);
		break;
	case SPRN_HID4:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[4]);
		break;
	case SPRN_HID5:
		kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[5]);
		break;
	case SPRN_THRM1:
	case SPRN_THRM2:
	case SPRN_THRM3:
	case SPRN_CTRLF:
	case SPRN_CTRLT:
		kvmppc_set_gpr(vcpu, rt, 0);
		break;
	default:
		printk(KERN_INFO "KVM: invalid SPR read: %d\n", sprn);
#ifndef DEBUG_SPR
		emulated = EMULATE_FAIL;
#endif
		break;
	}

	return emulated;
}