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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 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright SUSE Linux Products GmbH 2010
16 * Copyright 2010-2011 Freescale Semiconductor, Inc.
17 *
18 * Authors: Alexander Graf <agraf@suse.de>
19 */
20
21#include <asm/ppc_asm.h>
22#include <asm/kvm_asm.h>
23#include <asm/reg.h>
24#include <asm/page.h>
25#include <asm/asm-offsets.h>
26
27#define KVM_MAGIC_PAGE (-4096)
28
29#ifdef CONFIG_64BIT
30#define LL64(reg, offs, reg2) ld reg, (offs)(reg2)
31#define STL64(reg, offs, reg2) std reg, (offs)(reg2)
32#else
33#define LL64(reg, offs, reg2) lwz reg, (offs + 4)(reg2)
34#define STL64(reg, offs, reg2) stw reg, (offs + 4)(reg2)
35#endif
36
37#define SCRATCH_SAVE \
38 /* Enable critical section. We are critical if \
39 shared->critical == r1 */ \
40 STL64(r1, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); \
41 \
42 /* Save state */ \
43 PPC_STL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \
44 PPC_STL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \
45 mfcr r31; \
46 stw r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0);
47
48#define SCRATCH_RESTORE \
49 /* Restore state */ \
50 PPC_LL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \
51 lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0); \
52 mtcr r30; \
53 PPC_LL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \
54 \
55 /* Disable critical section. We are critical if \
56 shared->critical == r1 and r2 is always != r1 */ \
57 STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0);
58
59.global kvm_template_start
60kvm_template_start:
61
62.global kvm_emulate_mtmsrd
63kvm_emulate_mtmsrd:
64
65 SCRATCH_SAVE
66
67 /* Put MSR & ~(MSR_EE|MSR_RI) in r31 */
68 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
69 lis r30, (~(MSR_EE | MSR_RI))@h
70 ori r30, r30, (~(MSR_EE | MSR_RI))@l
71 and r31, r31, r30
72
73 /* OR the register's (MSR_EE|MSR_RI) on MSR */
74kvm_emulate_mtmsrd_reg:
75 ori r30, r0, 0
76 andi. r30, r30, (MSR_EE|MSR_RI)
77 or r31, r31, r30
78
79 /* Put MSR back into magic page */
80 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
81
82 /* Check if we have to fetch an interrupt */
83 lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
84 cmpwi r31, 0
85 beq+ no_check
86
87 /* Check if we may trigger an interrupt */
88 andi. r30, r30, MSR_EE
89 beq no_check
90
91 SCRATCH_RESTORE
92
93 /* Nag hypervisor */
94kvm_emulate_mtmsrd_orig_ins:
95 tlbsync
96
97 b kvm_emulate_mtmsrd_branch
98
99no_check:
100
101 SCRATCH_RESTORE
102
103 /* Go back to caller */
104kvm_emulate_mtmsrd_branch:
105 b .
106kvm_emulate_mtmsrd_end:
107
108.global kvm_emulate_mtmsrd_branch_offs
109kvm_emulate_mtmsrd_branch_offs:
110 .long (kvm_emulate_mtmsrd_branch - kvm_emulate_mtmsrd) / 4
111
112.global kvm_emulate_mtmsrd_reg_offs
113kvm_emulate_mtmsrd_reg_offs:
114 .long (kvm_emulate_mtmsrd_reg - kvm_emulate_mtmsrd) / 4
115
116.global kvm_emulate_mtmsrd_orig_ins_offs
117kvm_emulate_mtmsrd_orig_ins_offs:
118 .long (kvm_emulate_mtmsrd_orig_ins - kvm_emulate_mtmsrd) / 4
119
120.global kvm_emulate_mtmsrd_len
121kvm_emulate_mtmsrd_len:
122 .long (kvm_emulate_mtmsrd_end - kvm_emulate_mtmsrd) / 4
123
124
125#define MSR_SAFE_BITS (MSR_EE | MSR_RI)
126#define MSR_CRITICAL_BITS ~MSR_SAFE_BITS
127
128.global kvm_emulate_mtmsr
129kvm_emulate_mtmsr:
130
131 SCRATCH_SAVE
132
133 /* Fetch old MSR in r31 */
134 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
135
136 /* Find the changed bits between old and new MSR */
137kvm_emulate_mtmsr_reg1:
138 ori r30, r0, 0
139 xor r31, r30, r31
140
141 /* Check if we need to really do mtmsr */
142 LOAD_REG_IMMEDIATE(r30, MSR_CRITICAL_BITS)
143 and. r31, r31, r30
144
145 /* No critical bits changed? Maybe we can stay in the guest. */
146 beq maybe_stay_in_guest
147
148do_mtmsr:
149
150 SCRATCH_RESTORE
151
152 /* Just fire off the mtmsr if it's critical */
153kvm_emulate_mtmsr_orig_ins:
154 mtmsr r0
155
156 b kvm_emulate_mtmsr_branch
157
158maybe_stay_in_guest:
159
160 /* Get the target register in r30 */
161kvm_emulate_mtmsr_reg2:
162 ori r30, r0, 0
163
164 /* Put MSR into magic page because we don't call mtmsr */
165 STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
166
167 /* Check if we have to fetch an interrupt */
168 lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
169 cmpwi r31, 0
170 beq+ no_mtmsr
171
172 /* Check if we may trigger an interrupt */
173 andi. r31, r30, MSR_EE
174 bne do_mtmsr
175
176no_mtmsr:
177
178 SCRATCH_RESTORE
179
180 /* Go back to caller */
181kvm_emulate_mtmsr_branch:
182 b .
183kvm_emulate_mtmsr_end:
184
185.global kvm_emulate_mtmsr_branch_offs
186kvm_emulate_mtmsr_branch_offs:
187 .long (kvm_emulate_mtmsr_branch - kvm_emulate_mtmsr) / 4
188
189.global kvm_emulate_mtmsr_reg1_offs
190kvm_emulate_mtmsr_reg1_offs:
191 .long (kvm_emulate_mtmsr_reg1 - kvm_emulate_mtmsr) / 4
192
193.global kvm_emulate_mtmsr_reg2_offs
194kvm_emulate_mtmsr_reg2_offs:
195 .long (kvm_emulate_mtmsr_reg2 - kvm_emulate_mtmsr) / 4
196
197.global kvm_emulate_mtmsr_orig_ins_offs
198kvm_emulate_mtmsr_orig_ins_offs:
199 .long (kvm_emulate_mtmsr_orig_ins - kvm_emulate_mtmsr) / 4
200
201.global kvm_emulate_mtmsr_len
202kvm_emulate_mtmsr_len:
203 .long (kvm_emulate_mtmsr_end - kvm_emulate_mtmsr) / 4
204
205/* also used for wrteei 1 */
206.global kvm_emulate_wrtee
207kvm_emulate_wrtee:
208
209 SCRATCH_SAVE
210
211 /* Fetch old MSR in r31 */
212 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
213
214 /* Insert new MSR[EE] */
215kvm_emulate_wrtee_reg:
216 ori r30, r0, 0
217 rlwimi r31, r30, 0, MSR_EE
218
219 /*
220 * If MSR[EE] is now set, check for a pending interrupt.
221 * We could skip this if MSR[EE] was already on, but that
222 * should be rare, so don't bother.
223 */
224 andi. r30, r30, MSR_EE
225
226 /* Put MSR into magic page because we don't call wrtee */
227 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
228
229 beq no_wrtee
230
231 /* Check if we have to fetch an interrupt */
232 lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
233 cmpwi r30, 0
234 bne do_wrtee
235
236no_wrtee:
237 SCRATCH_RESTORE
238
239 /* Go back to caller */
240kvm_emulate_wrtee_branch:
241 b .
242
243do_wrtee:
244 SCRATCH_RESTORE
245
246 /* Just fire off the wrtee if it's critical */
247kvm_emulate_wrtee_orig_ins:
248 wrtee r0
249
250 b kvm_emulate_wrtee_branch
251
252kvm_emulate_wrtee_end:
253
254.global kvm_emulate_wrtee_branch_offs
255kvm_emulate_wrtee_branch_offs:
256 .long (kvm_emulate_wrtee_branch - kvm_emulate_wrtee) / 4
257
258.global kvm_emulate_wrtee_reg_offs
259kvm_emulate_wrtee_reg_offs:
260 .long (kvm_emulate_wrtee_reg - kvm_emulate_wrtee) / 4
261
262.global kvm_emulate_wrtee_orig_ins_offs
263kvm_emulate_wrtee_orig_ins_offs:
264 .long (kvm_emulate_wrtee_orig_ins - kvm_emulate_wrtee) / 4
265
266.global kvm_emulate_wrtee_len
267kvm_emulate_wrtee_len:
268 .long (kvm_emulate_wrtee_end - kvm_emulate_wrtee) / 4
269
270.global kvm_emulate_wrteei_0
271kvm_emulate_wrteei_0:
272 SCRATCH_SAVE
273
274 /* Fetch old MSR in r31 */
275 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
276
277 /* Remove MSR_EE from old MSR */
278 rlwinm r31, r31, 0, ~MSR_EE
279
280 /* Write new MSR value back */
281 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
282
283 SCRATCH_RESTORE
284
285 /* Go back to caller */
286kvm_emulate_wrteei_0_branch:
287 b .
288kvm_emulate_wrteei_0_end:
289
290.global kvm_emulate_wrteei_0_branch_offs
291kvm_emulate_wrteei_0_branch_offs:
292 .long (kvm_emulate_wrteei_0_branch - kvm_emulate_wrteei_0) / 4
293
294.global kvm_emulate_wrteei_0_len
295kvm_emulate_wrteei_0_len:
296 .long (kvm_emulate_wrteei_0_end - kvm_emulate_wrteei_0) / 4
297
298.global kvm_emulate_mtsrin
299kvm_emulate_mtsrin:
300
301 SCRATCH_SAVE
302
303 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
304 andi. r31, r31, MSR_DR | MSR_IR
305 beq kvm_emulate_mtsrin_reg1
306
307 SCRATCH_RESTORE
308
309kvm_emulate_mtsrin_orig_ins:
310 nop
311 b kvm_emulate_mtsrin_branch
312
313kvm_emulate_mtsrin_reg1:
314 /* rX >> 26 */
315 rlwinm r30,r0,6,26,29
316
317kvm_emulate_mtsrin_reg2:
318 stw r0, (KVM_MAGIC_PAGE + KVM_MAGIC_SR)(r30)
319
320 SCRATCH_RESTORE
321
322 /* Go back to caller */
323kvm_emulate_mtsrin_branch:
324 b .
325kvm_emulate_mtsrin_end:
326
327.global kvm_emulate_mtsrin_branch_offs
328kvm_emulate_mtsrin_branch_offs:
329 .long (kvm_emulate_mtsrin_branch - kvm_emulate_mtsrin) / 4
330
331.global kvm_emulate_mtsrin_reg1_offs
332kvm_emulate_mtsrin_reg1_offs:
333 .long (kvm_emulate_mtsrin_reg1 - kvm_emulate_mtsrin) / 4
334
335.global kvm_emulate_mtsrin_reg2_offs
336kvm_emulate_mtsrin_reg2_offs:
337 .long (kvm_emulate_mtsrin_reg2 - kvm_emulate_mtsrin) / 4
338
339.global kvm_emulate_mtsrin_orig_ins_offs
340kvm_emulate_mtsrin_orig_ins_offs:
341 .long (kvm_emulate_mtsrin_orig_ins - kvm_emulate_mtsrin) / 4
342
343.global kvm_emulate_mtsrin_len
344kvm_emulate_mtsrin_len:
345 .long (kvm_emulate_mtsrin_end - kvm_emulate_mtsrin) / 4
346
347.global kvm_template_end
348kvm_template_end:
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 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright SUSE Linux Products GmbH 2010
16 * Copyright 2010-2011 Freescale Semiconductor, Inc.
17 *
18 * Authors: Alexander Graf <agraf@suse.de>
19 */
20
21#include <asm/ppc_asm.h>
22#include <asm/kvm_asm.h>
23#include <asm/reg.h>
24#include <asm/page.h>
25#include <asm/asm-offsets.h>
26
27#define KVM_MAGIC_PAGE (-4096)
28
29#ifdef CONFIG_64BIT
30#define LL64(reg, offs, reg2) ld reg, (offs)(reg2)
31#define STL64(reg, offs, reg2) std reg, (offs)(reg2)
32#else
33#define LL64(reg, offs, reg2) lwz reg, (offs + 4)(reg2)
34#define STL64(reg, offs, reg2) stw reg, (offs + 4)(reg2)
35#endif
36
37#define SCRATCH_SAVE \
38 /* Enable critical section. We are critical if \
39 shared->critical == r1 */ \
40 STL64(r1, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); \
41 \
42 /* Save state */ \
43 PPC_STL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \
44 PPC_STL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \
45 mfcr r31; \
46 stw r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0);
47
48#define SCRATCH_RESTORE \
49 /* Restore state */ \
50 PPC_LL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \
51 lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0); \
52 mtcr r30; \
53 PPC_LL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \
54 \
55 /* Disable critical section. We are critical if \
56 shared->critical == r1 and r2 is always != r1 */ \
57 STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0);
58
59.global kvm_template_start
60kvm_template_start:
61
62.global kvm_emulate_mtmsrd
63kvm_emulate_mtmsrd:
64
65 SCRATCH_SAVE
66
67 /* Put MSR & ~(MSR_EE|MSR_RI) in r31 */
68 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
69 lis r30, (~(MSR_EE | MSR_RI))@h
70 ori r30, r30, (~(MSR_EE | MSR_RI))@l
71 and r31, r31, r30
72
73 /* OR the register's (MSR_EE|MSR_RI) on MSR */
74kvm_emulate_mtmsrd_reg:
75 ori r30, r0, 0
76 andi. r30, r30, (MSR_EE|MSR_RI)
77 or r31, r31, r30
78
79 /* Put MSR back into magic page */
80 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
81
82 /* Check if we have to fetch an interrupt */
83 lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
84 cmpwi r31, 0
85 beq+ no_check
86
87 /* Check if we may trigger an interrupt */
88 andi. r30, r30, MSR_EE
89 beq no_check
90
91 SCRATCH_RESTORE
92
93 /* Nag hypervisor */
94kvm_emulate_mtmsrd_orig_ins:
95 tlbsync
96
97 b kvm_emulate_mtmsrd_branch
98
99no_check:
100
101 SCRATCH_RESTORE
102
103 /* Go back to caller */
104kvm_emulate_mtmsrd_branch:
105 b .
106kvm_emulate_mtmsrd_end:
107
108.global kvm_emulate_mtmsrd_branch_offs
109kvm_emulate_mtmsrd_branch_offs:
110 .long (kvm_emulate_mtmsrd_branch - kvm_emulate_mtmsrd) / 4
111
112.global kvm_emulate_mtmsrd_reg_offs
113kvm_emulate_mtmsrd_reg_offs:
114 .long (kvm_emulate_mtmsrd_reg - kvm_emulate_mtmsrd) / 4
115
116.global kvm_emulate_mtmsrd_orig_ins_offs
117kvm_emulate_mtmsrd_orig_ins_offs:
118 .long (kvm_emulate_mtmsrd_orig_ins - kvm_emulate_mtmsrd) / 4
119
120.global kvm_emulate_mtmsrd_len
121kvm_emulate_mtmsrd_len:
122 .long (kvm_emulate_mtmsrd_end - kvm_emulate_mtmsrd) / 4
123
124
125#define MSR_SAFE_BITS (MSR_EE | MSR_RI)
126#define MSR_CRITICAL_BITS ~MSR_SAFE_BITS
127
128.global kvm_emulate_mtmsr
129kvm_emulate_mtmsr:
130
131 SCRATCH_SAVE
132
133 /* Fetch old MSR in r31 */
134 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
135
136 /* Find the changed bits between old and new MSR */
137kvm_emulate_mtmsr_reg1:
138 ori r30, r0, 0
139 xor r31, r30, r31
140
141 /* Check if we need to really do mtmsr */
142 LOAD_REG_IMMEDIATE(r30, MSR_CRITICAL_BITS)
143 and. r31, r31, r30
144
145 /* No critical bits changed? Maybe we can stay in the guest. */
146 beq maybe_stay_in_guest
147
148do_mtmsr:
149
150 SCRATCH_RESTORE
151
152 /* Just fire off the mtmsr if it's critical */
153kvm_emulate_mtmsr_orig_ins:
154 mtmsr r0
155
156 b kvm_emulate_mtmsr_branch
157
158maybe_stay_in_guest:
159
160 /* Get the target register in r30 */
161kvm_emulate_mtmsr_reg2:
162 ori r30, r0, 0
163
164 /* Put MSR into magic page because we don't call mtmsr */
165 STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
166
167 /* Check if we have to fetch an interrupt */
168 lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
169 cmpwi r31, 0
170 beq+ no_mtmsr
171
172 /* Check if we may trigger an interrupt */
173 andi. r31, r30, MSR_EE
174 bne do_mtmsr
175
176no_mtmsr:
177
178 SCRATCH_RESTORE
179
180 /* Go back to caller */
181kvm_emulate_mtmsr_branch:
182 b .
183kvm_emulate_mtmsr_end:
184
185.global kvm_emulate_mtmsr_branch_offs
186kvm_emulate_mtmsr_branch_offs:
187 .long (kvm_emulate_mtmsr_branch - kvm_emulate_mtmsr) / 4
188
189.global kvm_emulate_mtmsr_reg1_offs
190kvm_emulate_mtmsr_reg1_offs:
191 .long (kvm_emulate_mtmsr_reg1 - kvm_emulate_mtmsr) / 4
192
193.global kvm_emulate_mtmsr_reg2_offs
194kvm_emulate_mtmsr_reg2_offs:
195 .long (kvm_emulate_mtmsr_reg2 - kvm_emulate_mtmsr) / 4
196
197.global kvm_emulate_mtmsr_orig_ins_offs
198kvm_emulate_mtmsr_orig_ins_offs:
199 .long (kvm_emulate_mtmsr_orig_ins - kvm_emulate_mtmsr) / 4
200
201.global kvm_emulate_mtmsr_len
202kvm_emulate_mtmsr_len:
203 .long (kvm_emulate_mtmsr_end - kvm_emulate_mtmsr) / 4
204
205/* also used for wrteei 1 */
206.global kvm_emulate_wrtee
207kvm_emulate_wrtee:
208
209 SCRATCH_SAVE
210
211 /* Fetch old MSR in r31 */
212 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
213
214 /* Insert new MSR[EE] */
215kvm_emulate_wrtee_reg:
216 ori r30, r0, 0
217 rlwimi r31, r30, 0, MSR_EE
218
219 /*
220 * If MSR[EE] is now set, check for a pending interrupt.
221 * We could skip this if MSR[EE] was already on, but that
222 * should be rare, so don't bother.
223 */
224 andi. r30, r30, MSR_EE
225
226 /* Put MSR into magic page because we don't call wrtee */
227 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
228
229 beq no_wrtee
230
231 /* Check if we have to fetch an interrupt */
232 lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0)
233 cmpwi r30, 0
234 bne do_wrtee
235
236no_wrtee:
237 SCRATCH_RESTORE
238
239 /* Go back to caller */
240kvm_emulate_wrtee_branch:
241 b .
242
243do_wrtee:
244 SCRATCH_RESTORE
245
246 /* Just fire off the wrtee if it's critical */
247kvm_emulate_wrtee_orig_ins:
248 wrtee r0
249
250 b kvm_emulate_wrtee_branch
251
252kvm_emulate_wrtee_end:
253
254.global kvm_emulate_wrtee_branch_offs
255kvm_emulate_wrtee_branch_offs:
256 .long (kvm_emulate_wrtee_branch - kvm_emulate_wrtee) / 4
257
258.global kvm_emulate_wrtee_reg_offs
259kvm_emulate_wrtee_reg_offs:
260 .long (kvm_emulate_wrtee_reg - kvm_emulate_wrtee) / 4
261
262.global kvm_emulate_wrtee_orig_ins_offs
263kvm_emulate_wrtee_orig_ins_offs:
264 .long (kvm_emulate_wrtee_orig_ins - kvm_emulate_wrtee) / 4
265
266.global kvm_emulate_wrtee_len
267kvm_emulate_wrtee_len:
268 .long (kvm_emulate_wrtee_end - kvm_emulate_wrtee) / 4
269
270.global kvm_emulate_wrteei_0
271kvm_emulate_wrteei_0:
272 SCRATCH_SAVE
273
274 /* Fetch old MSR in r31 */
275 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
276
277 /* Remove MSR_EE from old MSR */
278 rlwinm r31, r31, 0, ~MSR_EE
279
280 /* Write new MSR value back */
281 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
282
283 SCRATCH_RESTORE
284
285 /* Go back to caller */
286kvm_emulate_wrteei_0_branch:
287 b .
288kvm_emulate_wrteei_0_end:
289
290.global kvm_emulate_wrteei_0_branch_offs
291kvm_emulate_wrteei_0_branch_offs:
292 .long (kvm_emulate_wrteei_0_branch - kvm_emulate_wrteei_0) / 4
293
294.global kvm_emulate_wrteei_0_len
295kvm_emulate_wrteei_0_len:
296 .long (kvm_emulate_wrteei_0_end - kvm_emulate_wrteei_0) / 4
297
298.global kvm_emulate_mtsrin
299kvm_emulate_mtsrin:
300
301 SCRATCH_SAVE
302
303 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0)
304 andi. r31, r31, MSR_DR | MSR_IR
305 beq kvm_emulate_mtsrin_reg1
306
307 SCRATCH_RESTORE
308
309kvm_emulate_mtsrin_orig_ins:
310 nop
311 b kvm_emulate_mtsrin_branch
312
313kvm_emulate_mtsrin_reg1:
314 /* rX >> 26 */
315 rlwinm r30,r0,6,26,29
316
317kvm_emulate_mtsrin_reg2:
318 stw r0, (KVM_MAGIC_PAGE + KVM_MAGIC_SR)(r30)
319
320 SCRATCH_RESTORE
321
322 /* Go back to caller */
323kvm_emulate_mtsrin_branch:
324 b .
325kvm_emulate_mtsrin_end:
326
327.global kvm_emulate_mtsrin_branch_offs
328kvm_emulate_mtsrin_branch_offs:
329 .long (kvm_emulate_mtsrin_branch - kvm_emulate_mtsrin) / 4
330
331.global kvm_emulate_mtsrin_reg1_offs
332kvm_emulate_mtsrin_reg1_offs:
333 .long (kvm_emulate_mtsrin_reg1 - kvm_emulate_mtsrin) / 4
334
335.global kvm_emulate_mtsrin_reg2_offs
336kvm_emulate_mtsrin_reg2_offs:
337 .long (kvm_emulate_mtsrin_reg2 - kvm_emulate_mtsrin) / 4
338
339.global kvm_emulate_mtsrin_orig_ins_offs
340kvm_emulate_mtsrin_orig_ins_offs:
341 .long (kvm_emulate_mtsrin_orig_ins - kvm_emulate_mtsrin) / 4
342
343.global kvm_emulate_mtsrin_len
344kvm_emulate_mtsrin_len:
345 .long (kvm_emulate_mtsrin_end - kvm_emulate_mtsrin) / 4
346
347.global kvm_template_end
348kvm_template_end: