1 /*
2 * x86 SMM helpers
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu/main-loop.h"
22 #include "cpu.h"
23 #include "exec/helper-proto.h"
24 #include "exec/log.h"
25
26 /* SMM support */
27
28 #if defined(CONFIG_USER_ONLY)
29
do_smm_enter(X86CPU * cpu)30 void do_smm_enter(X86CPU *cpu)
31 {
32 }
33
helper_rsm(CPUX86State * env)34 void helper_rsm(CPUX86State *env)
35 {
36 }
37
38 #else
39
40 #ifdef TARGET_X86_64
41 #define SMM_REVISION_ID 0x00020064
42 #else
43 #define SMM_REVISION_ID 0x00020000
44 #endif
45
do_smm_enter(X86CPU * cpu)46 void do_smm_enter(X86CPU *cpu)
47 {
48 CPUX86State *env = &cpu->env;
49 CPUState *cs = CPU(cpu);
50 target_ulong sm_state;
51 SegmentCache *dt;
52 int i, offset;
53
54 qemu_log_mask(CPU_LOG_INT, "SMM: enter\n");
55 log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
56
57 env->msr_smi_count++;
58 env->hflags |= HF_SMM_MASK;
59 if (env->hflags2 & HF2_NMI_MASK) {
60 env->hflags2 |= HF2_SMM_INSIDE_NMI_MASK;
61 } else {
62 env->hflags2 |= HF2_NMI_MASK;
63 }
64
65 sm_state = env->smbase + 0x8000;
66
67 #ifdef TARGET_X86_64
68 for (i = 0; i < 6; i++) {
69 dt = &env->segs[i];
70 offset = 0x7e00 + i * 16;
71 x86_stw_phys(cs, sm_state + offset, dt->selector);
72 x86_stw_phys(cs, sm_state + offset + 2, (dt->flags >> 8) & 0xf0ff);
73 x86_stl_phys(cs, sm_state + offset + 4, dt->limit);
74 x86_stq_phys(cs, sm_state + offset + 8, dt->base);
75 }
76
77 x86_stq_phys(cs, sm_state + 0x7e68, env->gdt.base);
78 x86_stl_phys(cs, sm_state + 0x7e64, env->gdt.limit);
79
80 x86_stw_phys(cs, sm_state + 0x7e70, env->ldt.selector);
81 x86_stq_phys(cs, sm_state + 0x7e78, env->ldt.base);
82 x86_stl_phys(cs, sm_state + 0x7e74, env->ldt.limit);
83 x86_stw_phys(cs, sm_state + 0x7e72, (env->ldt.flags >> 8) & 0xf0ff);
84
85 x86_stq_phys(cs, sm_state + 0x7e88, env->idt.base);
86 x86_stl_phys(cs, sm_state + 0x7e84, env->idt.limit);
87
88 x86_stw_phys(cs, sm_state + 0x7e90, env->tr.selector);
89 x86_stq_phys(cs, sm_state + 0x7e98, env->tr.base);
90 x86_stl_phys(cs, sm_state + 0x7e94, env->tr.limit);
91 x86_stw_phys(cs, sm_state + 0x7e92, (env->tr.flags >> 8) & 0xf0ff);
92
93 /* ??? Vol 1, 16.5.6 Intel MPX and SMM says that IA32_BNDCFGS
94 is saved at offset 7ED0. Vol 3, 34.4.1.1, Table 32-2, has
95 7EA0-7ED7 as "reserved". What's this, and what's really
96 supposed to happen? */
97 x86_stq_phys(cs, sm_state + 0x7ed0, env->efer);
98
99 x86_stq_phys(cs, sm_state + 0x7ff8, env->regs[R_EAX]);
100 x86_stq_phys(cs, sm_state + 0x7ff0, env->regs[R_ECX]);
101 x86_stq_phys(cs, sm_state + 0x7fe8, env->regs[R_EDX]);
102 x86_stq_phys(cs, sm_state + 0x7fe0, env->regs[R_EBX]);
103 x86_stq_phys(cs, sm_state + 0x7fd8, env->regs[R_ESP]);
104 x86_stq_phys(cs, sm_state + 0x7fd0, env->regs[R_EBP]);
105 x86_stq_phys(cs, sm_state + 0x7fc8, env->regs[R_ESI]);
106 x86_stq_phys(cs, sm_state + 0x7fc0, env->regs[R_EDI]);
107 for (i = 8; i < 16; i++) {
108 x86_stq_phys(cs, sm_state + 0x7ff8 - i * 8, env->regs[i]);
109 }
110 x86_stq_phys(cs, sm_state + 0x7f78, env->eip);
111 x86_stl_phys(cs, sm_state + 0x7f70, cpu_compute_eflags(env));
112 x86_stl_phys(cs, sm_state + 0x7f68, env->dr[6]);
113 x86_stl_phys(cs, sm_state + 0x7f60, env->dr[7]);
114
115 x86_stl_phys(cs, sm_state + 0x7f48, env->cr[4]);
116 x86_stq_phys(cs, sm_state + 0x7f50, env->cr[3]);
117 x86_stl_phys(cs, sm_state + 0x7f58, env->cr[0]);
118
119 x86_stl_phys(cs, sm_state + 0x7efc, SMM_REVISION_ID);
120 x86_stl_phys(cs, sm_state + 0x7f00, env->smbase);
121 #else
122 x86_stl_phys(cs, sm_state + 0x7ffc, env->cr[0]);
123 x86_stl_phys(cs, sm_state + 0x7ff8, env->cr[3]);
124 x86_stl_phys(cs, sm_state + 0x7ff4, cpu_compute_eflags(env));
125 x86_stl_phys(cs, sm_state + 0x7ff0, env->eip);
126 x86_stl_phys(cs, sm_state + 0x7fec, env->regs[R_EDI]);
127 x86_stl_phys(cs, sm_state + 0x7fe8, env->regs[R_ESI]);
128 x86_stl_phys(cs, sm_state + 0x7fe4, env->regs[R_EBP]);
129 x86_stl_phys(cs, sm_state + 0x7fe0, env->regs[R_ESP]);
130 x86_stl_phys(cs, sm_state + 0x7fdc, env->regs[R_EBX]);
131 x86_stl_phys(cs, sm_state + 0x7fd8, env->regs[R_EDX]);
132 x86_stl_phys(cs, sm_state + 0x7fd4, env->regs[R_ECX]);
133 x86_stl_phys(cs, sm_state + 0x7fd0, env->regs[R_EAX]);
134 x86_stl_phys(cs, sm_state + 0x7fcc, env->dr[6]);
135 x86_stl_phys(cs, sm_state + 0x7fc8, env->dr[7]);
136
137 x86_stl_phys(cs, sm_state + 0x7fc4, env->tr.selector);
138 x86_stl_phys(cs, sm_state + 0x7f64, env->tr.base);
139 x86_stl_phys(cs, sm_state + 0x7f60, env->tr.limit);
140 x86_stl_phys(cs, sm_state + 0x7f5c, (env->tr.flags >> 8) & 0xf0ff);
141
142 x86_stl_phys(cs, sm_state + 0x7fc0, env->ldt.selector);
143 x86_stl_phys(cs, sm_state + 0x7f80, env->ldt.base);
144 x86_stl_phys(cs, sm_state + 0x7f7c, env->ldt.limit);
145 x86_stl_phys(cs, sm_state + 0x7f78, (env->ldt.flags >> 8) & 0xf0ff);
146
147 x86_stl_phys(cs, sm_state + 0x7f74, env->gdt.base);
148 x86_stl_phys(cs, sm_state + 0x7f70, env->gdt.limit);
149
150 x86_stl_phys(cs, sm_state + 0x7f58, env->idt.base);
151 x86_stl_phys(cs, sm_state + 0x7f54, env->idt.limit);
152
153 for (i = 0; i < 6; i++) {
154 dt = &env->segs[i];
155 if (i < 3) {
156 offset = 0x7f84 + i * 12;
157 } else {
158 offset = 0x7f2c + (i - 3) * 12;
159 }
160 x86_stl_phys(cs, sm_state + 0x7fa8 + i * 4, dt->selector);
161 x86_stl_phys(cs, sm_state + offset + 8, dt->base);
162 x86_stl_phys(cs, sm_state + offset + 4, dt->limit);
163 x86_stl_phys(cs, sm_state + offset, (dt->flags >> 8) & 0xf0ff);
164 }
165 x86_stl_phys(cs, sm_state + 0x7f14, env->cr[4]);
166
167 x86_stl_phys(cs, sm_state + 0x7efc, SMM_REVISION_ID);
168 x86_stl_phys(cs, sm_state + 0x7ef8, env->smbase);
169 #endif
170 /* init SMM cpu state */
171
172 #ifdef TARGET_X86_64
173 cpu_load_efer(env, 0);
174 #endif
175 cpu_load_eflags(env, 0, ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C |
176 DF_MASK));
177 env->eip = 0x00008000;
178 cpu_x86_update_cr0(env,
179 env->cr[0] & ~(CR0_PE_MASK | CR0_EM_MASK | CR0_TS_MASK |
180 CR0_PG_MASK));
181 cpu_x86_update_cr4(env, 0);
182 env->dr[7] = 0x00000400;
183
184 cpu_x86_load_seg_cache(env, R_CS, (env->smbase >> 4) & 0xffff, env->smbase,
185 0xffffffff,
186 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
187 DESC_G_MASK | DESC_A_MASK);
188 cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffffffff,
189 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
190 DESC_G_MASK | DESC_A_MASK);
191 cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffffffff,
192 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
193 DESC_G_MASK | DESC_A_MASK);
194 cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffffffff,
195 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
196 DESC_G_MASK | DESC_A_MASK);
197 cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffffffff,
198 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
199 DESC_G_MASK | DESC_A_MASK);
200 cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffffffff,
201 DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
202 DESC_G_MASK | DESC_A_MASK);
203 }
204
helper_rsm(CPUX86State * env)205 void helper_rsm(CPUX86State *env)
206 {
207 X86CPU *cpu = env_archcpu(env);
208 CPUState *cs = env_cpu(env);
209 target_ulong sm_state;
210 int i, offset;
211 uint32_t val;
212
213 sm_state = env->smbase + 0x8000;
214 #ifdef TARGET_X86_64
215 cpu_load_efer(env, x86_ldq_phys(cs, sm_state + 0x7ed0));
216
217 env->gdt.base = x86_ldq_phys(cs, sm_state + 0x7e68);
218 env->gdt.limit = x86_ldl_phys(cs, sm_state + 0x7e64);
219
220 env->ldt.selector = x86_lduw_phys(cs, sm_state + 0x7e70);
221 env->ldt.base = x86_ldq_phys(cs, sm_state + 0x7e78);
222 env->ldt.limit = x86_ldl_phys(cs, sm_state + 0x7e74);
223 env->ldt.flags = (x86_lduw_phys(cs, sm_state + 0x7e72) & 0xf0ff) << 8;
224
225 env->idt.base = x86_ldq_phys(cs, sm_state + 0x7e88);
226 env->idt.limit = x86_ldl_phys(cs, sm_state + 0x7e84);
227
228 env->tr.selector = x86_lduw_phys(cs, sm_state + 0x7e90);
229 env->tr.base = x86_ldq_phys(cs, sm_state + 0x7e98);
230 env->tr.limit = x86_ldl_phys(cs, sm_state + 0x7e94);
231 env->tr.flags = (x86_lduw_phys(cs, sm_state + 0x7e92) & 0xf0ff) << 8;
232
233 env->regs[R_EAX] = x86_ldq_phys(cs, sm_state + 0x7ff8);
234 env->regs[R_ECX] = x86_ldq_phys(cs, sm_state + 0x7ff0);
235 env->regs[R_EDX] = x86_ldq_phys(cs, sm_state + 0x7fe8);
236 env->regs[R_EBX] = x86_ldq_phys(cs, sm_state + 0x7fe0);
237 env->regs[R_ESP] = x86_ldq_phys(cs, sm_state + 0x7fd8);
238 env->regs[R_EBP] = x86_ldq_phys(cs, sm_state + 0x7fd0);
239 env->regs[R_ESI] = x86_ldq_phys(cs, sm_state + 0x7fc8);
240 env->regs[R_EDI] = x86_ldq_phys(cs, sm_state + 0x7fc0);
241 for (i = 8; i < 16; i++) {
242 env->regs[i] = x86_ldq_phys(cs, sm_state + 0x7ff8 - i * 8);
243 }
244 env->eip = x86_ldq_phys(cs, sm_state + 0x7f78);
245 cpu_load_eflags(env, x86_ldl_phys(cs, sm_state + 0x7f70),
246 ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
247 env->dr[6] = x86_ldl_phys(cs, sm_state + 0x7f68);
248 env->dr[7] = x86_ldl_phys(cs, sm_state + 0x7f60);
249
250 cpu_x86_update_cr4(env, x86_ldl_phys(cs, sm_state + 0x7f48));
251 cpu_x86_update_cr3(env, x86_ldq_phys(cs, sm_state + 0x7f50));
252 cpu_x86_update_cr0(env, x86_ldl_phys(cs, sm_state + 0x7f58));
253
254 for (i = 0; i < 6; i++) {
255 offset = 0x7e00 + i * 16;
256 cpu_x86_load_seg_cache(env, i,
257 x86_lduw_phys(cs, sm_state + offset),
258 x86_ldq_phys(cs, sm_state + offset + 8),
259 x86_ldl_phys(cs, sm_state + offset + 4),
260 (x86_lduw_phys(cs, sm_state + offset + 2) &
261 0xf0ff) << 8);
262 }
263
264 val = x86_ldl_phys(cs, sm_state + 0x7efc); /* revision ID */
265 if (val & 0x20000) {
266 env->smbase = x86_ldl_phys(cs, sm_state + 0x7f00);
267 }
268 #else
269 cpu_x86_update_cr0(env, x86_ldl_phys(cs, sm_state + 0x7ffc));
270 cpu_x86_update_cr3(env, x86_ldl_phys(cs, sm_state + 0x7ff8));
271 cpu_load_eflags(env, x86_ldl_phys(cs, sm_state + 0x7ff4),
272 ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
273 env->eip = x86_ldl_phys(cs, sm_state + 0x7ff0);
274 env->regs[R_EDI] = x86_ldl_phys(cs, sm_state + 0x7fec);
275 env->regs[R_ESI] = x86_ldl_phys(cs, sm_state + 0x7fe8);
276 env->regs[R_EBP] = x86_ldl_phys(cs, sm_state + 0x7fe4);
277 env->regs[R_ESP] = x86_ldl_phys(cs, sm_state + 0x7fe0);
278 env->regs[R_EBX] = x86_ldl_phys(cs, sm_state + 0x7fdc);
279 env->regs[R_EDX] = x86_ldl_phys(cs, sm_state + 0x7fd8);
280 env->regs[R_ECX] = x86_ldl_phys(cs, sm_state + 0x7fd4);
281 env->regs[R_EAX] = x86_ldl_phys(cs, sm_state + 0x7fd0);
282 env->dr[6] = x86_ldl_phys(cs, sm_state + 0x7fcc);
283 env->dr[7] = x86_ldl_phys(cs, sm_state + 0x7fc8);
284
285 env->tr.selector = x86_ldl_phys(cs, sm_state + 0x7fc4) & 0xffff;
286 env->tr.base = x86_ldl_phys(cs, sm_state + 0x7f64);
287 env->tr.limit = x86_ldl_phys(cs, sm_state + 0x7f60);
288 env->tr.flags = (x86_ldl_phys(cs, sm_state + 0x7f5c) & 0xf0ff) << 8;
289
290 env->ldt.selector = x86_ldl_phys(cs, sm_state + 0x7fc0) & 0xffff;
291 env->ldt.base = x86_ldl_phys(cs, sm_state + 0x7f80);
292 env->ldt.limit = x86_ldl_phys(cs, sm_state + 0x7f7c);
293 env->ldt.flags = (x86_ldl_phys(cs, sm_state + 0x7f78) & 0xf0ff) << 8;
294
295 env->gdt.base = x86_ldl_phys(cs, sm_state + 0x7f74);
296 env->gdt.limit = x86_ldl_phys(cs, sm_state + 0x7f70);
297
298 env->idt.base = x86_ldl_phys(cs, sm_state + 0x7f58);
299 env->idt.limit = x86_ldl_phys(cs, sm_state + 0x7f54);
300
301 for (i = 0; i < 6; i++) {
302 if (i < 3) {
303 offset = 0x7f84 + i * 12;
304 } else {
305 offset = 0x7f2c + (i - 3) * 12;
306 }
307 cpu_x86_load_seg_cache(env, i,
308 x86_ldl_phys(cs,
309 sm_state + 0x7fa8 + i * 4) & 0xffff,
310 x86_ldl_phys(cs, sm_state + offset + 8),
311 x86_ldl_phys(cs, sm_state + offset + 4),
312 (x86_ldl_phys(cs,
313 sm_state + offset) & 0xf0ff) << 8);
314 }
315 cpu_x86_update_cr4(env, x86_ldl_phys(cs, sm_state + 0x7f14));
316
317 val = x86_ldl_phys(cs, sm_state + 0x7efc); /* revision ID */
318 if (val & 0x20000) {
319 env->smbase = x86_ldl_phys(cs, sm_state + 0x7ef8);
320 }
321 #endif
322 if ((env->hflags2 & HF2_SMM_INSIDE_NMI_MASK) == 0) {
323 env->hflags2 &= ~HF2_NMI_MASK;
324 }
325 env->hflags2 &= ~HF2_SMM_INSIDE_NMI_MASK;
326 env->hflags &= ~HF_SMM_MASK;
327
328 qemu_log_mask(CPU_LOG_INT, "SMM: after RSM\n");
329 log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
330 }
331
332 #endif /* !CONFIG_USER_ONLY */
333