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Commit | Line | Data |
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1da12ec4 LT |
1 | /* |
2 | * QEMU emulation of an Intel IOMMU (VT-d) | |
3 | * (DMA Remapping device) | |
4 | * | |
5 | * Copyright (C) 2013 Knut Omang, Oracle <knut.omang@oracle.com> | |
6 | * Copyright (C) 2014 Le Tan, <tamlokveer@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | ||
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ||
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
b6a0aa05 | 22 | #include "qemu/osdep.h" |
4684a204 | 23 | #include "qemu/error-report.h" |
6333e93c | 24 | #include "qapi/error.h" |
1da12ec4 LT |
25 | #include "hw/sysbus.h" |
26 | #include "exec/address-spaces.h" | |
27 | #include "intel_iommu_internal.h" | |
7df953bd | 28 | #include "hw/pci/pci.h" |
3cb3b154 | 29 | #include "hw/pci/pci_bus.h" |
621d983a | 30 | #include "hw/i386/pc.h" |
dea651a9 | 31 | #include "hw/i386/apic-msidef.h" |
04af0e18 PX |
32 | #include "hw/boards.h" |
33 | #include "hw/i386/x86-iommu.h" | |
cb135f59 | 34 | #include "hw/pci-host/q35.h" |
4684a204 | 35 | #include "sysemu/kvm.h" |
32946019 | 36 | #include "hw/i386/apic_internal.h" |
fb506e70 | 37 | #include "kvm_i386.h" |
bc535e59 | 38 | #include "trace.h" |
1da12ec4 | 39 | |
1da12ec4 LT |
40 | static void vtd_define_quad(IntelIOMMUState *s, hwaddr addr, uint64_t val, |
41 | uint64_t wmask, uint64_t w1cmask) | |
42 | { | |
43 | stq_le_p(&s->csr[addr], val); | |
44 | stq_le_p(&s->wmask[addr], wmask); | |
45 | stq_le_p(&s->w1cmask[addr], w1cmask); | |
46 | } | |
47 | ||
48 | static void vtd_define_quad_wo(IntelIOMMUState *s, hwaddr addr, uint64_t mask) | |
49 | { | |
50 | stq_le_p(&s->womask[addr], mask); | |
51 | } | |
52 | ||
53 | static void vtd_define_long(IntelIOMMUState *s, hwaddr addr, uint32_t val, | |
54 | uint32_t wmask, uint32_t w1cmask) | |
55 | { | |
56 | stl_le_p(&s->csr[addr], val); | |
57 | stl_le_p(&s->wmask[addr], wmask); | |
58 | stl_le_p(&s->w1cmask[addr], w1cmask); | |
59 | } | |
60 | ||
61 | static void vtd_define_long_wo(IntelIOMMUState *s, hwaddr addr, uint32_t mask) | |
62 | { | |
63 | stl_le_p(&s->womask[addr], mask); | |
64 | } | |
65 | ||
66 | /* "External" get/set operations */ | |
67 | static void vtd_set_quad(IntelIOMMUState *s, hwaddr addr, uint64_t val) | |
68 | { | |
69 | uint64_t oldval = ldq_le_p(&s->csr[addr]); | |
70 | uint64_t wmask = ldq_le_p(&s->wmask[addr]); | |
71 | uint64_t w1cmask = ldq_le_p(&s->w1cmask[addr]); | |
72 | stq_le_p(&s->csr[addr], | |
73 | ((oldval & ~wmask) | (val & wmask)) & ~(w1cmask & val)); | |
74 | } | |
75 | ||
76 | static void vtd_set_long(IntelIOMMUState *s, hwaddr addr, uint32_t val) | |
77 | { | |
78 | uint32_t oldval = ldl_le_p(&s->csr[addr]); | |
79 | uint32_t wmask = ldl_le_p(&s->wmask[addr]); | |
80 | uint32_t w1cmask = ldl_le_p(&s->w1cmask[addr]); | |
81 | stl_le_p(&s->csr[addr], | |
82 | ((oldval & ~wmask) | (val & wmask)) & ~(w1cmask & val)); | |
83 | } | |
84 | ||
85 | static uint64_t vtd_get_quad(IntelIOMMUState *s, hwaddr addr) | |
86 | { | |
87 | uint64_t val = ldq_le_p(&s->csr[addr]); | |
88 | uint64_t womask = ldq_le_p(&s->womask[addr]); | |
89 | return val & ~womask; | |
90 | } | |
91 | ||
92 | static uint32_t vtd_get_long(IntelIOMMUState *s, hwaddr addr) | |
93 | { | |
94 | uint32_t val = ldl_le_p(&s->csr[addr]); | |
95 | uint32_t womask = ldl_le_p(&s->womask[addr]); | |
96 | return val & ~womask; | |
97 | } | |
98 | ||
99 | /* "Internal" get/set operations */ | |
100 | static uint64_t vtd_get_quad_raw(IntelIOMMUState *s, hwaddr addr) | |
101 | { | |
102 | return ldq_le_p(&s->csr[addr]); | |
103 | } | |
104 | ||
105 | static uint32_t vtd_get_long_raw(IntelIOMMUState *s, hwaddr addr) | |
106 | { | |
107 | return ldl_le_p(&s->csr[addr]); | |
108 | } | |
109 | ||
110 | static void vtd_set_quad_raw(IntelIOMMUState *s, hwaddr addr, uint64_t val) | |
111 | { | |
112 | stq_le_p(&s->csr[addr], val); | |
113 | } | |
114 | ||
115 | static uint32_t vtd_set_clear_mask_long(IntelIOMMUState *s, hwaddr addr, | |
116 | uint32_t clear, uint32_t mask) | |
117 | { | |
118 | uint32_t new_val = (ldl_le_p(&s->csr[addr]) & ~clear) | mask; | |
119 | stl_le_p(&s->csr[addr], new_val); | |
120 | return new_val; | |
121 | } | |
122 | ||
123 | static uint64_t vtd_set_clear_mask_quad(IntelIOMMUState *s, hwaddr addr, | |
124 | uint64_t clear, uint64_t mask) | |
125 | { | |
126 | uint64_t new_val = (ldq_le_p(&s->csr[addr]) & ~clear) | mask; | |
127 | stq_le_p(&s->csr[addr], new_val); | |
128 | return new_val; | |
129 | } | |
130 | ||
b5a280c0 LT |
131 | /* GHashTable functions */ |
132 | static gboolean vtd_uint64_equal(gconstpointer v1, gconstpointer v2) | |
133 | { | |
134 | return *((const uint64_t *)v1) == *((const uint64_t *)v2); | |
135 | } | |
136 | ||
137 | static guint vtd_uint64_hash(gconstpointer v) | |
138 | { | |
139 | return (guint)*(const uint64_t *)v; | |
140 | } | |
141 | ||
142 | static gboolean vtd_hash_remove_by_domain(gpointer key, gpointer value, | |
143 | gpointer user_data) | |
144 | { | |
145 | VTDIOTLBEntry *entry = (VTDIOTLBEntry *)value; | |
146 | uint16_t domain_id = *(uint16_t *)user_data; | |
147 | return entry->domain_id == domain_id; | |
148 | } | |
149 | ||
d66b969b JW |
150 | /* The shift of an addr for a certain level of paging structure */ |
151 | static inline uint32_t vtd_slpt_level_shift(uint32_t level) | |
152 | { | |
7e58326a | 153 | assert(level != 0); |
d66b969b JW |
154 | return VTD_PAGE_SHIFT_4K + (level - 1) * VTD_SL_LEVEL_BITS; |
155 | } | |
156 | ||
157 | static inline uint64_t vtd_slpt_level_page_mask(uint32_t level) | |
158 | { | |
159 | return ~((1ULL << vtd_slpt_level_shift(level)) - 1); | |
160 | } | |
161 | ||
b5a280c0 LT |
162 | static gboolean vtd_hash_remove_by_page(gpointer key, gpointer value, |
163 | gpointer user_data) | |
164 | { | |
165 | VTDIOTLBEntry *entry = (VTDIOTLBEntry *)value; | |
166 | VTDIOTLBPageInvInfo *info = (VTDIOTLBPageInvInfo *)user_data; | |
d66b969b JW |
167 | uint64_t gfn = (info->addr >> VTD_PAGE_SHIFT_4K) & info->mask; |
168 | uint64_t gfn_tlb = (info->addr & entry->mask) >> VTD_PAGE_SHIFT_4K; | |
b5a280c0 | 169 | return (entry->domain_id == info->domain_id) && |
d66b969b JW |
170 | (((entry->gfn & info->mask) == gfn) || |
171 | (entry->gfn == gfn_tlb)); | |
b5a280c0 LT |
172 | } |
173 | ||
d92fa2dc LT |
174 | /* Reset all the gen of VTDAddressSpace to zero and set the gen of |
175 | * IntelIOMMUState to 1. | |
176 | */ | |
177 | static void vtd_reset_context_cache(IntelIOMMUState *s) | |
178 | { | |
d92fa2dc | 179 | VTDAddressSpace *vtd_as; |
7df953bd KO |
180 | VTDBus *vtd_bus; |
181 | GHashTableIter bus_it; | |
d92fa2dc LT |
182 | uint32_t devfn_it; |
183 | ||
7feb51b7 PX |
184 | trace_vtd_context_cache_reset(); |
185 | ||
7df953bd KO |
186 | g_hash_table_iter_init(&bus_it, s->vtd_as_by_busptr); |
187 | ||
7df953bd | 188 | while (g_hash_table_iter_next (&bus_it, NULL, (void**)&vtd_bus)) { |
04af0e18 | 189 | for (devfn_it = 0; devfn_it < X86_IOMMU_PCI_DEVFN_MAX; ++devfn_it) { |
7df953bd | 190 | vtd_as = vtd_bus->dev_as[devfn_it]; |
d92fa2dc LT |
191 | if (!vtd_as) { |
192 | continue; | |
193 | } | |
194 | vtd_as->context_cache_entry.context_cache_gen = 0; | |
195 | } | |
196 | } | |
197 | s->context_cache_gen = 1; | |
198 | } | |
199 | ||
b5a280c0 LT |
200 | static void vtd_reset_iotlb(IntelIOMMUState *s) |
201 | { | |
202 | assert(s->iotlb); | |
203 | g_hash_table_remove_all(s->iotlb); | |
204 | } | |
205 | ||
bacabb0a | 206 | static uint64_t vtd_get_iotlb_key(uint64_t gfn, uint16_t source_id, |
d66b969b JW |
207 | uint32_t level) |
208 | { | |
209 | return gfn | ((uint64_t)(source_id) << VTD_IOTLB_SID_SHIFT) | | |
210 | ((uint64_t)(level) << VTD_IOTLB_LVL_SHIFT); | |
211 | } | |
212 | ||
213 | static uint64_t vtd_get_iotlb_gfn(hwaddr addr, uint32_t level) | |
214 | { | |
215 | return (addr & vtd_slpt_level_page_mask(level)) >> VTD_PAGE_SHIFT_4K; | |
216 | } | |
217 | ||
b5a280c0 LT |
218 | static VTDIOTLBEntry *vtd_lookup_iotlb(IntelIOMMUState *s, uint16_t source_id, |
219 | hwaddr addr) | |
220 | { | |
d66b969b | 221 | VTDIOTLBEntry *entry; |
b5a280c0 | 222 | uint64_t key; |
d66b969b JW |
223 | int level; |
224 | ||
225 | for (level = VTD_SL_PT_LEVEL; level < VTD_SL_PML4_LEVEL; level++) { | |
226 | key = vtd_get_iotlb_key(vtd_get_iotlb_gfn(addr, level), | |
227 | source_id, level); | |
228 | entry = g_hash_table_lookup(s->iotlb, &key); | |
229 | if (entry) { | |
230 | goto out; | |
231 | } | |
232 | } | |
b5a280c0 | 233 | |
d66b969b JW |
234 | out: |
235 | return entry; | |
b5a280c0 LT |
236 | } |
237 | ||
238 | static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t source_id, | |
239 | uint16_t domain_id, hwaddr addr, uint64_t slpte, | |
07f7b733 | 240 | uint8_t access_flags, uint32_t level) |
b5a280c0 LT |
241 | { |
242 | VTDIOTLBEntry *entry = g_malloc(sizeof(*entry)); | |
243 | uint64_t *key = g_malloc(sizeof(*key)); | |
d66b969b | 244 | uint64_t gfn = vtd_get_iotlb_gfn(addr, level); |
b5a280c0 | 245 | |
6c441e1d | 246 | trace_vtd_iotlb_page_update(source_id, addr, slpte, domain_id); |
b5a280c0 | 247 | if (g_hash_table_size(s->iotlb) >= VTD_IOTLB_MAX_SIZE) { |
6c441e1d | 248 | trace_vtd_iotlb_reset("iotlb exceeds size limit"); |
b5a280c0 LT |
249 | vtd_reset_iotlb(s); |
250 | } | |
251 | ||
252 | entry->gfn = gfn; | |
253 | entry->domain_id = domain_id; | |
254 | entry->slpte = slpte; | |
07f7b733 | 255 | entry->access_flags = access_flags; |
d66b969b JW |
256 | entry->mask = vtd_slpt_level_page_mask(level); |
257 | *key = vtd_get_iotlb_key(gfn, source_id, level); | |
b5a280c0 LT |
258 | g_hash_table_replace(s->iotlb, key, entry); |
259 | } | |
260 | ||
1da12ec4 LT |
261 | /* Given the reg addr of both the message data and address, generate an |
262 | * interrupt via MSI. | |
263 | */ | |
264 | static void vtd_generate_interrupt(IntelIOMMUState *s, hwaddr mesg_addr_reg, | |
265 | hwaddr mesg_data_reg) | |
266 | { | |
32946019 | 267 | MSIMessage msi; |
1da12ec4 LT |
268 | |
269 | assert(mesg_data_reg < DMAR_REG_SIZE); | |
270 | assert(mesg_addr_reg < DMAR_REG_SIZE); | |
271 | ||
32946019 RK |
272 | msi.address = vtd_get_long_raw(s, mesg_addr_reg); |
273 | msi.data = vtd_get_long_raw(s, mesg_data_reg); | |
1da12ec4 | 274 | |
7feb51b7 PX |
275 | trace_vtd_irq_generate(msi.address, msi.data); |
276 | ||
32946019 | 277 | apic_get_class()->send_msi(&msi); |
1da12ec4 LT |
278 | } |
279 | ||
280 | /* Generate a fault event to software via MSI if conditions are met. | |
281 | * Notice that the value of FSTS_REG being passed to it should be the one | |
282 | * before any update. | |
283 | */ | |
284 | static void vtd_generate_fault_event(IntelIOMMUState *s, uint32_t pre_fsts) | |
285 | { | |
286 | if (pre_fsts & VTD_FSTS_PPF || pre_fsts & VTD_FSTS_PFO || | |
287 | pre_fsts & VTD_FSTS_IQE) { | |
7feb51b7 PX |
288 | trace_vtd_err("There are previous interrupt conditions " |
289 | "to be serviced by software, fault event " | |
290 | "is not generated."); | |
1da12ec4 LT |
291 | return; |
292 | } | |
293 | vtd_set_clear_mask_long(s, DMAR_FECTL_REG, 0, VTD_FECTL_IP); | |
294 | if (vtd_get_long_raw(s, DMAR_FECTL_REG) & VTD_FECTL_IM) { | |
7feb51b7 | 295 | trace_vtd_err("Interrupt Mask set, irq is not generated."); |
1da12ec4 LT |
296 | } else { |
297 | vtd_generate_interrupt(s, DMAR_FEADDR_REG, DMAR_FEDATA_REG); | |
298 | vtd_set_clear_mask_long(s, DMAR_FECTL_REG, VTD_FECTL_IP, 0); | |
299 | } | |
300 | } | |
301 | ||
302 | /* Check if the Fault (F) field of the Fault Recording Register referenced by | |
303 | * @index is Set. | |
304 | */ | |
305 | static bool vtd_is_frcd_set(IntelIOMMUState *s, uint16_t index) | |
306 | { | |
307 | /* Each reg is 128-bit */ | |
308 | hwaddr addr = DMAR_FRCD_REG_OFFSET + (((uint64_t)index) << 4); | |
309 | addr += 8; /* Access the high 64-bit half */ | |
310 | ||
311 | assert(index < DMAR_FRCD_REG_NR); | |
312 | ||
313 | return vtd_get_quad_raw(s, addr) & VTD_FRCD_F; | |
314 | } | |
315 | ||
316 | /* Update the PPF field of Fault Status Register. | |
317 | * Should be called whenever change the F field of any fault recording | |
318 | * registers. | |
319 | */ | |
320 | static void vtd_update_fsts_ppf(IntelIOMMUState *s) | |
321 | { | |
322 | uint32_t i; | |
323 | uint32_t ppf_mask = 0; | |
324 | ||
325 | for (i = 0; i < DMAR_FRCD_REG_NR; i++) { | |
326 | if (vtd_is_frcd_set(s, i)) { | |
327 | ppf_mask = VTD_FSTS_PPF; | |
328 | break; | |
329 | } | |
330 | } | |
331 | vtd_set_clear_mask_long(s, DMAR_FSTS_REG, VTD_FSTS_PPF, ppf_mask); | |
7feb51b7 | 332 | trace_vtd_fsts_ppf(!!ppf_mask); |
1da12ec4 LT |
333 | } |
334 | ||
335 | static void vtd_set_frcd_and_update_ppf(IntelIOMMUState *s, uint16_t index) | |
336 | { | |
337 | /* Each reg is 128-bit */ | |
338 | hwaddr addr = DMAR_FRCD_REG_OFFSET + (((uint64_t)index) << 4); | |
339 | addr += 8; /* Access the high 64-bit half */ | |
340 | ||
341 | assert(index < DMAR_FRCD_REG_NR); | |
342 | ||
343 | vtd_set_clear_mask_quad(s, addr, 0, VTD_FRCD_F); | |
344 | vtd_update_fsts_ppf(s); | |
345 | } | |
346 | ||
347 | /* Must not update F field now, should be done later */ | |
348 | static void vtd_record_frcd(IntelIOMMUState *s, uint16_t index, | |
349 | uint16_t source_id, hwaddr addr, | |
350 | VTDFaultReason fault, bool is_write) | |
351 | { | |
352 | uint64_t hi = 0, lo; | |
353 | hwaddr frcd_reg_addr = DMAR_FRCD_REG_OFFSET + (((uint64_t)index) << 4); | |
354 | ||
355 | assert(index < DMAR_FRCD_REG_NR); | |
356 | ||
357 | lo = VTD_FRCD_FI(addr); | |
358 | hi = VTD_FRCD_SID(source_id) | VTD_FRCD_FR(fault); | |
359 | if (!is_write) { | |
360 | hi |= VTD_FRCD_T; | |
361 | } | |
362 | vtd_set_quad_raw(s, frcd_reg_addr, lo); | |
363 | vtd_set_quad_raw(s, frcd_reg_addr + 8, hi); | |
7feb51b7 PX |
364 | |
365 | trace_vtd_frr_new(index, hi, lo); | |
1da12ec4 LT |
366 | } |
367 | ||
368 | /* Try to collapse multiple pending faults from the same requester */ | |
369 | static bool vtd_try_collapse_fault(IntelIOMMUState *s, uint16_t source_id) | |
370 | { | |
371 | uint32_t i; | |
372 | uint64_t frcd_reg; | |
373 | hwaddr addr = DMAR_FRCD_REG_OFFSET + 8; /* The high 64-bit half */ | |
374 | ||
375 | for (i = 0; i < DMAR_FRCD_REG_NR; i++) { | |
376 | frcd_reg = vtd_get_quad_raw(s, addr); | |
1da12ec4 LT |
377 | if ((frcd_reg & VTD_FRCD_F) && |
378 | ((frcd_reg & VTD_FRCD_SID_MASK) == source_id)) { | |
379 | return true; | |
380 | } | |
381 | addr += 16; /* 128-bit for each */ | |
382 | } | |
383 | return false; | |
384 | } | |
385 | ||
386 | /* Log and report an DMAR (address translation) fault to software */ | |
387 | static void vtd_report_dmar_fault(IntelIOMMUState *s, uint16_t source_id, | |
388 | hwaddr addr, VTDFaultReason fault, | |
389 | bool is_write) | |
390 | { | |
391 | uint32_t fsts_reg = vtd_get_long_raw(s, DMAR_FSTS_REG); | |
392 | ||
393 | assert(fault < VTD_FR_MAX); | |
394 | ||
395 | if (fault == VTD_FR_RESERVED_ERR) { | |
396 | /* This is not a normal fault reason case. Drop it. */ | |
397 | return; | |
398 | } | |
7feb51b7 PX |
399 | |
400 | trace_vtd_dmar_fault(source_id, fault, addr, is_write); | |
401 | ||
1da12ec4 | 402 | if (fsts_reg & VTD_FSTS_PFO) { |
7feb51b7 PX |
403 | trace_vtd_err("New fault is not recorded due to " |
404 | "Primary Fault Overflow."); | |
1da12ec4 LT |
405 | return; |
406 | } | |
7feb51b7 | 407 | |
1da12ec4 | 408 | if (vtd_try_collapse_fault(s, source_id)) { |
7feb51b7 PX |
409 | trace_vtd_err("New fault is not recorded due to " |
410 | "compression of faults."); | |
1da12ec4 LT |
411 | return; |
412 | } | |
7feb51b7 | 413 | |
1da12ec4 | 414 | if (vtd_is_frcd_set(s, s->next_frcd_reg)) { |
7feb51b7 PX |
415 | trace_vtd_err("Next Fault Recording Reg is used, " |
416 | "new fault is not recorded, set PFO field."); | |
1da12ec4 LT |
417 | vtd_set_clear_mask_long(s, DMAR_FSTS_REG, 0, VTD_FSTS_PFO); |
418 | return; | |
419 | } | |
420 | ||
421 | vtd_record_frcd(s, s->next_frcd_reg, source_id, addr, fault, is_write); | |
422 | ||
423 | if (fsts_reg & VTD_FSTS_PPF) { | |
7feb51b7 PX |
424 | trace_vtd_err("There are pending faults already, " |
425 | "fault event is not generated."); | |
1da12ec4 LT |
426 | vtd_set_frcd_and_update_ppf(s, s->next_frcd_reg); |
427 | s->next_frcd_reg++; | |
428 | if (s->next_frcd_reg == DMAR_FRCD_REG_NR) { | |
429 | s->next_frcd_reg = 0; | |
430 | } | |
431 | } else { | |
432 | vtd_set_clear_mask_long(s, DMAR_FSTS_REG, VTD_FSTS_FRI_MASK, | |
433 | VTD_FSTS_FRI(s->next_frcd_reg)); | |
434 | vtd_set_frcd_and_update_ppf(s, s->next_frcd_reg); /* Will set PPF */ | |
435 | s->next_frcd_reg++; | |
436 | if (s->next_frcd_reg == DMAR_FRCD_REG_NR) { | |
437 | s->next_frcd_reg = 0; | |
438 | } | |
439 | /* This case actually cause the PPF to be Set. | |
440 | * So generate fault event (interrupt). | |
441 | */ | |
442 | vtd_generate_fault_event(s, fsts_reg); | |
443 | } | |
444 | } | |
445 | ||
ed7b8fbc LT |
446 | /* Handle Invalidation Queue Errors of queued invalidation interface error |
447 | * conditions. | |
448 | */ | |
449 | static void vtd_handle_inv_queue_error(IntelIOMMUState *s) | |
450 | { | |
451 | uint32_t fsts_reg = vtd_get_long_raw(s, DMAR_FSTS_REG); | |
452 | ||
453 | vtd_set_clear_mask_long(s, DMAR_FSTS_REG, 0, VTD_FSTS_IQE); | |
454 | vtd_generate_fault_event(s, fsts_reg); | |
455 | } | |
456 | ||
457 | /* Set the IWC field and try to generate an invalidation completion interrupt */ | |
458 | static void vtd_generate_completion_event(IntelIOMMUState *s) | |
459 | { | |
ed7b8fbc | 460 | if (vtd_get_long_raw(s, DMAR_ICS_REG) & VTD_ICS_IWC) { |
bc535e59 | 461 | trace_vtd_inv_desc_wait_irq("One pending, skip current"); |
ed7b8fbc LT |
462 | return; |
463 | } | |
464 | vtd_set_clear_mask_long(s, DMAR_ICS_REG, 0, VTD_ICS_IWC); | |
465 | vtd_set_clear_mask_long(s, DMAR_IECTL_REG, 0, VTD_IECTL_IP); | |
466 | if (vtd_get_long_raw(s, DMAR_IECTL_REG) & VTD_IECTL_IM) { | |
bc535e59 PX |
467 | trace_vtd_inv_desc_wait_irq("IM in IECTL_REG is set, " |
468 | "new event not generated"); | |
ed7b8fbc LT |
469 | return; |
470 | } else { | |
471 | /* Generate the interrupt event */ | |
bc535e59 | 472 | trace_vtd_inv_desc_wait_irq("Generating complete event"); |
ed7b8fbc LT |
473 | vtd_generate_interrupt(s, DMAR_IEADDR_REG, DMAR_IEDATA_REG); |
474 | vtd_set_clear_mask_long(s, DMAR_IECTL_REG, VTD_IECTL_IP, 0); | |
475 | } | |
476 | } | |
477 | ||
1da12ec4 LT |
478 | static inline bool vtd_root_entry_present(VTDRootEntry *root) |
479 | { | |
480 | return root->val & VTD_ROOT_ENTRY_P; | |
481 | } | |
482 | ||
483 | static int vtd_get_root_entry(IntelIOMMUState *s, uint8_t index, | |
484 | VTDRootEntry *re) | |
485 | { | |
486 | dma_addr_t addr; | |
487 | ||
488 | addr = s->root + index * sizeof(*re); | |
489 | if (dma_memory_read(&address_space_memory, addr, re, sizeof(*re))) { | |
6c441e1d | 490 | trace_vtd_re_invalid(re->rsvd, re->val); |
1da12ec4 LT |
491 | re->val = 0; |
492 | return -VTD_FR_ROOT_TABLE_INV; | |
493 | } | |
494 | re->val = le64_to_cpu(re->val); | |
495 | return 0; | |
496 | } | |
497 | ||
8f7d7161 | 498 | static inline bool vtd_ce_present(VTDContextEntry *context) |
1da12ec4 LT |
499 | { |
500 | return context->lo & VTD_CONTEXT_ENTRY_P; | |
501 | } | |
502 | ||
503 | static int vtd_get_context_entry_from_root(VTDRootEntry *root, uint8_t index, | |
504 | VTDContextEntry *ce) | |
505 | { | |
506 | dma_addr_t addr; | |
507 | ||
6c441e1d | 508 | /* we have checked that root entry is present */ |
1da12ec4 LT |
509 | addr = (root->val & VTD_ROOT_ENTRY_CTP) + index * sizeof(*ce); |
510 | if (dma_memory_read(&address_space_memory, addr, ce, sizeof(*ce))) { | |
6c441e1d | 511 | trace_vtd_re_invalid(root->rsvd, root->val); |
1da12ec4 LT |
512 | return -VTD_FR_CONTEXT_TABLE_INV; |
513 | } | |
514 | ce->lo = le64_to_cpu(ce->lo); | |
515 | ce->hi = le64_to_cpu(ce->hi); | |
516 | return 0; | |
517 | } | |
518 | ||
8f7d7161 | 519 | static inline dma_addr_t vtd_ce_get_slpt_base(VTDContextEntry *ce) |
1da12ec4 LT |
520 | { |
521 | return ce->lo & VTD_CONTEXT_ENTRY_SLPTPTR; | |
522 | } | |
523 | ||
1da12ec4 LT |
524 | static inline uint64_t vtd_get_slpte_addr(uint64_t slpte) |
525 | { | |
526 | return slpte & VTD_SL_PT_BASE_ADDR_MASK; | |
527 | } | |
528 | ||
529 | /* Whether the pte indicates the address of the page frame */ | |
530 | static inline bool vtd_is_last_slpte(uint64_t slpte, uint32_t level) | |
531 | { | |
532 | return level == VTD_SL_PT_LEVEL || (slpte & VTD_SL_PT_PAGE_SIZE_MASK); | |
533 | } | |
534 | ||
535 | /* Get the content of a spte located in @base_addr[@index] */ | |
536 | static uint64_t vtd_get_slpte(dma_addr_t base_addr, uint32_t index) | |
537 | { | |
538 | uint64_t slpte; | |
539 | ||
540 | assert(index < VTD_SL_PT_ENTRY_NR); | |
541 | ||
542 | if (dma_memory_read(&address_space_memory, | |
543 | base_addr + index * sizeof(slpte), &slpte, | |
544 | sizeof(slpte))) { | |
545 | slpte = (uint64_t)-1; | |
546 | return slpte; | |
547 | } | |
548 | slpte = le64_to_cpu(slpte); | |
549 | return slpte; | |
550 | } | |
551 | ||
6e905564 PX |
552 | /* Given an iova and the level of paging structure, return the offset |
553 | * of current level. | |
1da12ec4 | 554 | */ |
6e905564 | 555 | static inline uint32_t vtd_iova_level_offset(uint64_t iova, uint32_t level) |
1da12ec4 | 556 | { |
6e905564 | 557 | return (iova >> vtd_slpt_level_shift(level)) & |
1da12ec4 LT |
558 | ((1ULL << VTD_SL_LEVEL_BITS) - 1); |
559 | } | |
560 | ||
561 | /* Check Capability Register to see if the @level of page-table is supported */ | |
562 | static inline bool vtd_is_level_supported(IntelIOMMUState *s, uint32_t level) | |
563 | { | |
564 | return VTD_CAP_SAGAW_MASK & s->cap & | |
565 | (1ULL << (level - 2 + VTD_CAP_SAGAW_SHIFT)); | |
566 | } | |
567 | ||
568 | /* Get the page-table level that hardware should use for the second-level | |
569 | * page-table walk from the Address Width field of context-entry. | |
570 | */ | |
8f7d7161 | 571 | static inline uint32_t vtd_ce_get_level(VTDContextEntry *ce) |
1da12ec4 LT |
572 | { |
573 | return 2 + (ce->hi & VTD_CONTEXT_ENTRY_AW); | |
574 | } | |
575 | ||
8f7d7161 | 576 | static inline uint32_t vtd_ce_get_agaw(VTDContextEntry *ce) |
1da12ec4 LT |
577 | { |
578 | return 30 + (ce->hi & VTD_CONTEXT_ENTRY_AW) * 9; | |
579 | } | |
580 | ||
127ff5c3 PX |
581 | static inline uint32_t vtd_ce_get_type(VTDContextEntry *ce) |
582 | { | |
583 | return ce->lo & VTD_CONTEXT_ENTRY_TT; | |
584 | } | |
585 | ||
f80c9874 PX |
586 | /* Return true if check passed, otherwise false */ |
587 | static inline bool vtd_ce_type_check(X86IOMMUState *x86_iommu, | |
588 | VTDContextEntry *ce) | |
589 | { | |
590 | switch (vtd_ce_get_type(ce)) { | |
591 | case VTD_CONTEXT_TT_MULTI_LEVEL: | |
592 | /* Always supported */ | |
593 | break; | |
594 | case VTD_CONTEXT_TT_DEV_IOTLB: | |
595 | if (!x86_iommu->dt_supported) { | |
596 | return false; | |
597 | } | |
598 | break; | |
dbaabb25 PX |
599 | case VTD_CONTEXT_TT_PASS_THROUGH: |
600 | if (!x86_iommu->pt_supported) { | |
601 | return false; | |
602 | } | |
603 | break; | |
f80c9874 PX |
604 | default: |
605 | /* Unknwon type */ | |
606 | return false; | |
607 | } | |
608 | return true; | |
609 | } | |
610 | ||
f06a696d PX |
611 | static inline uint64_t vtd_iova_limit(VTDContextEntry *ce) |
612 | { | |
8f7d7161 | 613 | uint32_t ce_agaw = vtd_ce_get_agaw(ce); |
f06a696d PX |
614 | return 1ULL << MIN(ce_agaw, VTD_MGAW); |
615 | } | |
616 | ||
617 | /* Return true if IOVA passes range check, otherwise false. */ | |
618 | static inline bool vtd_iova_range_check(uint64_t iova, VTDContextEntry *ce) | |
619 | { | |
620 | /* | |
621 | * Check if @iova is above 2^X-1, where X is the minimum of MGAW | |
622 | * in CAP_REG and AW in context-entry. | |
623 | */ | |
624 | return !(iova & ~(vtd_iova_limit(ce) - 1)); | |
625 | } | |
626 | ||
1da12ec4 LT |
627 | static const uint64_t vtd_paging_entry_rsvd_field[] = { |
628 | [0] = ~0ULL, | |
629 | /* For not large page */ | |
630 | [1] = 0x800ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
631 | [2] = 0x800ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
632 | [3] = 0x800ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
633 | [4] = 0x880ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
634 | /* For large page */ | |
635 | [5] = 0x800ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
636 | [6] = 0x1ff800ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
637 | [7] = 0x3ffff800ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
638 | [8] = 0x880ULL | ~(VTD_HAW_MASK | VTD_SL_IGN_COM), | |
639 | }; | |
640 | ||
641 | static bool vtd_slpte_nonzero_rsvd(uint64_t slpte, uint32_t level) | |
642 | { | |
643 | if (slpte & VTD_SL_PT_PAGE_SIZE_MASK) { | |
644 | /* Maybe large page */ | |
645 | return slpte & vtd_paging_entry_rsvd_field[level + 4]; | |
646 | } else { | |
647 | return slpte & vtd_paging_entry_rsvd_field[level]; | |
648 | } | |
649 | } | |
650 | ||
dbaabb25 PX |
651 | /* Find the VTD address space associated with a given bus number */ |
652 | static VTDBus *vtd_find_as_from_bus_num(IntelIOMMUState *s, uint8_t bus_num) | |
653 | { | |
654 | VTDBus *vtd_bus = s->vtd_as_by_bus_num[bus_num]; | |
655 | if (!vtd_bus) { | |
656 | /* | |
657 | * Iterate over the registered buses to find the one which | |
658 | * currently hold this bus number, and update the bus_num | |
659 | * lookup table: | |
660 | */ | |
661 | GHashTableIter iter; | |
662 | ||
663 | g_hash_table_iter_init(&iter, s->vtd_as_by_busptr); | |
664 | while (g_hash_table_iter_next(&iter, NULL, (void **)&vtd_bus)) { | |
665 | if (pci_bus_num(vtd_bus->bus) == bus_num) { | |
666 | s->vtd_as_by_bus_num[bus_num] = vtd_bus; | |
667 | return vtd_bus; | |
668 | } | |
669 | } | |
670 | } | |
671 | return vtd_bus; | |
672 | } | |
673 | ||
6e905564 | 674 | /* Given the @iova, get relevant @slptep. @slpte_level will be the last level |
1da12ec4 LT |
675 | * of the translation, can be used for deciding the size of large page. |
676 | */ | |
6e905564 PX |
677 | static int vtd_iova_to_slpte(VTDContextEntry *ce, uint64_t iova, bool is_write, |
678 | uint64_t *slptep, uint32_t *slpte_level, | |
679 | bool *reads, bool *writes) | |
1da12ec4 | 680 | { |
8f7d7161 PX |
681 | dma_addr_t addr = vtd_ce_get_slpt_base(ce); |
682 | uint32_t level = vtd_ce_get_level(ce); | |
1da12ec4 LT |
683 | uint32_t offset; |
684 | uint64_t slpte; | |
1da12ec4 LT |
685 | uint64_t access_right_check; |
686 | ||
f06a696d | 687 | if (!vtd_iova_range_check(iova, ce)) { |
7feb51b7 | 688 | trace_vtd_err_dmar_iova_overflow(iova); |
1da12ec4 LT |
689 | return -VTD_FR_ADDR_BEYOND_MGAW; |
690 | } | |
691 | ||
692 | /* FIXME: what is the Atomics request here? */ | |
693 | access_right_check = is_write ? VTD_SL_W : VTD_SL_R; | |
694 | ||
695 | while (true) { | |
6e905564 | 696 | offset = vtd_iova_level_offset(iova, level); |
1da12ec4 LT |
697 | slpte = vtd_get_slpte(addr, offset); |
698 | ||
699 | if (slpte == (uint64_t)-1) { | |
7feb51b7 | 700 | trace_vtd_err_dmar_slpte_read_error(iova, level); |
8f7d7161 | 701 | if (level == vtd_ce_get_level(ce)) { |
1da12ec4 LT |
702 | /* Invalid programming of context-entry */ |
703 | return -VTD_FR_CONTEXT_ENTRY_INV; | |
704 | } else { | |
705 | return -VTD_FR_PAGING_ENTRY_INV; | |
706 | } | |
707 | } | |
708 | *reads = (*reads) && (slpte & VTD_SL_R); | |
709 | *writes = (*writes) && (slpte & VTD_SL_W); | |
710 | if (!(slpte & access_right_check)) { | |
7feb51b7 | 711 | trace_vtd_err_dmar_slpte_perm_error(iova, level, slpte, is_write); |
1da12ec4 LT |
712 | return is_write ? -VTD_FR_WRITE : -VTD_FR_READ; |
713 | } | |
714 | if (vtd_slpte_nonzero_rsvd(slpte, level)) { | |
7feb51b7 | 715 | trace_vtd_err_dmar_slpte_resv_error(iova, level, slpte); |
1da12ec4 LT |
716 | return -VTD_FR_PAGING_ENTRY_RSVD; |
717 | } | |
718 | ||
719 | if (vtd_is_last_slpte(slpte, level)) { | |
720 | *slptep = slpte; | |
721 | *slpte_level = level; | |
722 | return 0; | |
723 | } | |
724 | addr = vtd_get_slpte_addr(slpte); | |
725 | level--; | |
726 | } | |
727 | } | |
728 | ||
f06a696d PX |
729 | typedef int (*vtd_page_walk_hook)(IOMMUTLBEntry *entry, void *private); |
730 | ||
731 | /** | |
732 | * vtd_page_walk_level - walk over specific level for IOVA range | |
733 | * | |
734 | * @addr: base GPA addr to start the walk | |
735 | * @start: IOVA range start address | |
736 | * @end: IOVA range end address (start <= addr < end) | |
737 | * @hook_fn: hook func to be called when detected page | |
738 | * @private: private data to be passed into hook func | |
739 | * @read: whether parent level has read permission | |
740 | * @write: whether parent level has write permission | |
741 | * @notify_unmap: whether we should notify invalid entries | |
742 | */ | |
743 | static int vtd_page_walk_level(dma_addr_t addr, uint64_t start, | |
744 | uint64_t end, vtd_page_walk_hook hook_fn, | |
745 | void *private, uint32_t level, | |
746 | bool read, bool write, bool notify_unmap) | |
747 | { | |
748 | bool read_cur, write_cur, entry_valid; | |
749 | uint32_t offset; | |
750 | uint64_t slpte; | |
751 | uint64_t subpage_size, subpage_mask; | |
752 | IOMMUTLBEntry entry; | |
753 | uint64_t iova = start; | |
754 | uint64_t iova_next; | |
755 | int ret = 0; | |
756 | ||
757 | trace_vtd_page_walk_level(addr, level, start, end); | |
758 | ||
759 | subpage_size = 1ULL << vtd_slpt_level_shift(level); | |
760 | subpage_mask = vtd_slpt_level_page_mask(level); | |
761 | ||
762 | while (iova < end) { | |
763 | iova_next = (iova & subpage_mask) + subpage_size; | |
764 | ||
765 | offset = vtd_iova_level_offset(iova, level); | |
766 | slpte = vtd_get_slpte(addr, offset); | |
767 | ||
768 | if (slpte == (uint64_t)-1) { | |
769 | trace_vtd_page_walk_skip_read(iova, iova_next); | |
770 | goto next; | |
771 | } | |
772 | ||
773 | if (vtd_slpte_nonzero_rsvd(slpte, level)) { | |
774 | trace_vtd_page_walk_skip_reserve(iova, iova_next); | |
775 | goto next; | |
776 | } | |
777 | ||
778 | /* Permissions are stacked with parents' */ | |
779 | read_cur = read && (slpte & VTD_SL_R); | |
780 | write_cur = write && (slpte & VTD_SL_W); | |
781 | ||
782 | /* | |
783 | * As long as we have either read/write permission, this is a | |
784 | * valid entry. The rule works for both page entries and page | |
785 | * table entries. | |
786 | */ | |
787 | entry_valid = read_cur | write_cur; | |
788 | ||
789 | if (vtd_is_last_slpte(slpte, level)) { | |
790 | entry.target_as = &address_space_memory; | |
791 | entry.iova = iova & subpage_mask; | |
792 | /* NOTE: this is only meaningful if entry_valid == true */ | |
793 | entry.translated_addr = vtd_get_slpte_addr(slpte); | |
794 | entry.addr_mask = ~subpage_mask; | |
795 | entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur); | |
796 | if (!entry_valid && !notify_unmap) { | |
797 | trace_vtd_page_walk_skip_perm(iova, iova_next); | |
798 | goto next; | |
799 | } | |
800 | trace_vtd_page_walk_one(level, entry.iova, entry.translated_addr, | |
801 | entry.addr_mask, entry.perm); | |
802 | if (hook_fn) { | |
803 | ret = hook_fn(&entry, private); | |
804 | if (ret < 0) { | |
805 | return ret; | |
806 | } | |
807 | } | |
808 | } else { | |
809 | if (!entry_valid) { | |
810 | trace_vtd_page_walk_skip_perm(iova, iova_next); | |
811 | goto next; | |
812 | } | |
813 | ret = vtd_page_walk_level(vtd_get_slpte_addr(slpte), iova, | |
814 | MIN(iova_next, end), hook_fn, private, | |
815 | level - 1, read_cur, write_cur, | |
816 | notify_unmap); | |
817 | if (ret < 0) { | |
818 | return ret; | |
819 | } | |
820 | } | |
821 | ||
822 | next: | |
823 | iova = iova_next; | |
824 | } | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | /** | |
830 | * vtd_page_walk - walk specific IOVA range, and call the hook | |
831 | * | |
832 | * @ce: context entry to walk upon | |
833 | * @start: IOVA address to start the walk | |
834 | * @end: IOVA range end address (start <= addr < end) | |
835 | * @hook_fn: the hook that to be called for each detected area | |
836 | * @private: private data for the hook function | |
837 | */ | |
838 | static int vtd_page_walk(VTDContextEntry *ce, uint64_t start, uint64_t end, | |
dd4d607e PX |
839 | vtd_page_walk_hook hook_fn, void *private, |
840 | bool notify_unmap) | |
f06a696d | 841 | { |
8f7d7161 PX |
842 | dma_addr_t addr = vtd_ce_get_slpt_base(ce); |
843 | uint32_t level = vtd_ce_get_level(ce); | |
f06a696d PX |
844 | |
845 | if (!vtd_iova_range_check(start, ce)) { | |
846 | return -VTD_FR_ADDR_BEYOND_MGAW; | |
847 | } | |
848 | ||
849 | if (!vtd_iova_range_check(end, ce)) { | |
850 | /* Fix end so that it reaches the maximum */ | |
851 | end = vtd_iova_limit(ce); | |
852 | } | |
853 | ||
854 | return vtd_page_walk_level(addr, start, end, hook_fn, private, | |
dd4d607e | 855 | level, true, true, notify_unmap); |
f06a696d PX |
856 | } |
857 | ||
1da12ec4 LT |
858 | /* Map a device to its corresponding domain (context-entry) */ |
859 | static int vtd_dev_to_context_entry(IntelIOMMUState *s, uint8_t bus_num, | |
860 | uint8_t devfn, VTDContextEntry *ce) | |
861 | { | |
862 | VTDRootEntry re; | |
863 | int ret_fr; | |
f80c9874 | 864 | X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s); |
1da12ec4 LT |
865 | |
866 | ret_fr = vtd_get_root_entry(s, bus_num, &re); | |
867 | if (ret_fr) { | |
868 | return ret_fr; | |
869 | } | |
870 | ||
871 | if (!vtd_root_entry_present(&re)) { | |
6c441e1d PX |
872 | /* Not error - it's okay we don't have root entry. */ |
873 | trace_vtd_re_not_present(bus_num); | |
1da12ec4 | 874 | return -VTD_FR_ROOT_ENTRY_P; |
f80c9874 PX |
875 | } |
876 | ||
877 | if (re.rsvd || (re.val & VTD_ROOT_ENTRY_RSVD)) { | |
6c441e1d | 878 | trace_vtd_re_invalid(re.rsvd, re.val); |
1da12ec4 LT |
879 | return -VTD_FR_ROOT_ENTRY_RSVD; |
880 | } | |
881 | ||
882 | ret_fr = vtd_get_context_entry_from_root(&re, devfn, ce); | |
883 | if (ret_fr) { | |
884 | return ret_fr; | |
885 | } | |
886 | ||
8f7d7161 | 887 | if (!vtd_ce_present(ce)) { |
6c441e1d PX |
888 | /* Not error - it's okay we don't have context entry. */ |
889 | trace_vtd_ce_not_present(bus_num, devfn); | |
1da12ec4 | 890 | return -VTD_FR_CONTEXT_ENTRY_P; |
f80c9874 PX |
891 | } |
892 | ||
893 | if ((ce->hi & VTD_CONTEXT_ENTRY_RSVD_HI) || | |
894 | (ce->lo & VTD_CONTEXT_ENTRY_RSVD_LO)) { | |
6c441e1d | 895 | trace_vtd_ce_invalid(ce->hi, ce->lo); |
1da12ec4 LT |
896 | return -VTD_FR_CONTEXT_ENTRY_RSVD; |
897 | } | |
f80c9874 | 898 | |
1da12ec4 | 899 | /* Check if the programming of context-entry is valid */ |
8f7d7161 | 900 | if (!vtd_is_level_supported(s, vtd_ce_get_level(ce))) { |
6c441e1d | 901 | trace_vtd_ce_invalid(ce->hi, ce->lo); |
1da12ec4 | 902 | return -VTD_FR_CONTEXT_ENTRY_INV; |
1da12ec4 | 903 | } |
f80c9874 PX |
904 | |
905 | /* Do translation type check */ | |
906 | if (!vtd_ce_type_check(x86_iommu, ce)) { | |
907 | trace_vtd_ce_invalid(ce->hi, ce->lo); | |
908 | return -VTD_FR_CONTEXT_ENTRY_INV; | |
909 | } | |
910 | ||
1da12ec4 LT |
911 | return 0; |
912 | } | |
913 | ||
dbaabb25 PX |
914 | /* |
915 | * Fetch translation type for specific device. Returns <0 if error | |
916 | * happens, otherwise return the shifted type to check against | |
917 | * VTD_CONTEXT_TT_*. | |
918 | */ | |
919 | static int vtd_dev_get_trans_type(VTDAddressSpace *as) | |
920 | { | |
921 | IntelIOMMUState *s; | |
922 | VTDContextEntry ce; | |
923 | int ret; | |
924 | ||
925 | s = as->iommu_state; | |
926 | ||
927 | ret = vtd_dev_to_context_entry(s, pci_bus_num(as->bus), | |
928 | as->devfn, &ce); | |
929 | if (ret) { | |
930 | return ret; | |
931 | } | |
932 | ||
933 | return vtd_ce_get_type(&ce); | |
934 | } | |
935 | ||
936 | static bool vtd_dev_pt_enabled(VTDAddressSpace *as) | |
937 | { | |
938 | int ret; | |
939 | ||
940 | assert(as); | |
941 | ||
942 | ret = vtd_dev_get_trans_type(as); | |
943 | if (ret < 0) { | |
944 | /* | |
945 | * Possibly failed to parse the context entry for some reason | |
946 | * (e.g., during init, or any guest configuration errors on | |
947 | * context entries). We should assume PT not enabled for | |
948 | * safety. | |
949 | */ | |
950 | return false; | |
951 | } | |
952 | ||
953 | return ret == VTD_CONTEXT_TT_PASS_THROUGH; | |
954 | } | |
955 | ||
956 | /* Return whether the device is using IOMMU translation. */ | |
957 | static bool vtd_switch_address_space(VTDAddressSpace *as) | |
958 | { | |
959 | bool use_iommu; | |
960 | ||
961 | assert(as); | |
962 | ||
963 | use_iommu = as->iommu_state->dmar_enabled & !vtd_dev_pt_enabled(as); | |
964 | ||
965 | trace_vtd_switch_address_space(pci_bus_num(as->bus), | |
966 | VTD_PCI_SLOT(as->devfn), | |
967 | VTD_PCI_FUNC(as->devfn), | |
968 | use_iommu); | |
969 | ||
970 | /* Turn off first then on the other */ | |
971 | if (use_iommu) { | |
972 | memory_region_set_enabled(&as->sys_alias, false); | |
3df9d748 | 973 | memory_region_set_enabled(MEMORY_REGION(&as->iommu), true); |
dbaabb25 | 974 | } else { |
3df9d748 | 975 | memory_region_set_enabled(MEMORY_REGION(&as->iommu), false); |
dbaabb25 PX |
976 | memory_region_set_enabled(&as->sys_alias, true); |
977 | } | |
978 | ||
979 | return use_iommu; | |
980 | } | |
981 | ||
982 | static void vtd_switch_address_space_all(IntelIOMMUState *s) | |
983 | { | |
984 | GHashTableIter iter; | |
985 | VTDBus *vtd_bus; | |
986 | int i; | |
987 | ||
988 | g_hash_table_iter_init(&iter, s->vtd_as_by_busptr); | |
989 | while (g_hash_table_iter_next(&iter, NULL, (void **)&vtd_bus)) { | |
990 | for (i = 0; i < X86_IOMMU_PCI_DEVFN_MAX; i++) { | |
991 | if (!vtd_bus->dev_as[i]) { | |
992 | continue; | |
993 | } | |
994 | vtd_switch_address_space(vtd_bus->dev_as[i]); | |
995 | } | |
996 | } | |
997 | } | |
998 | ||
1da12ec4 LT |
999 | static inline uint16_t vtd_make_source_id(uint8_t bus_num, uint8_t devfn) |
1000 | { | |
1001 | return ((bus_num & 0xffUL) << 8) | (devfn & 0xffUL); | |
1002 | } | |
1003 | ||
1004 | static const bool vtd_qualified_faults[] = { | |
1005 | [VTD_FR_RESERVED] = false, | |
1006 | [VTD_FR_ROOT_ENTRY_P] = false, | |
1007 | [VTD_FR_CONTEXT_ENTRY_P] = true, | |
1008 | [VTD_FR_CONTEXT_ENTRY_INV] = true, | |
1009 | [VTD_FR_ADDR_BEYOND_MGAW] = true, | |
1010 | [VTD_FR_WRITE] = true, | |
1011 | [VTD_FR_READ] = true, | |
1012 | [VTD_FR_PAGING_ENTRY_INV] = true, | |
1013 | [VTD_FR_ROOT_TABLE_INV] = false, | |
1014 | [VTD_FR_CONTEXT_TABLE_INV] = false, | |
1015 | [VTD_FR_ROOT_ENTRY_RSVD] = false, | |
1016 | [VTD_FR_PAGING_ENTRY_RSVD] = true, | |
1017 | [VTD_FR_CONTEXT_ENTRY_TT] = true, | |
1018 | [VTD_FR_RESERVED_ERR] = false, | |
1019 | [VTD_FR_MAX] = false, | |
1020 | }; | |
1021 | ||
1022 | /* To see if a fault condition is "qualified", which is reported to software | |
1023 | * only if the FPD field in the context-entry used to process the faulting | |
1024 | * request is 0. | |
1025 | */ | |
1026 | static inline bool vtd_is_qualified_fault(VTDFaultReason fault) | |
1027 | { | |
1028 | return vtd_qualified_faults[fault]; | |
1029 | } | |
1030 | ||
1031 | static inline bool vtd_is_interrupt_addr(hwaddr addr) | |
1032 | { | |
1033 | return VTD_INTERRUPT_ADDR_FIRST <= addr && addr <= VTD_INTERRUPT_ADDR_LAST; | |
1034 | } | |
1035 | ||
dbaabb25 PX |
1036 | static void vtd_pt_enable_fast_path(IntelIOMMUState *s, uint16_t source_id) |
1037 | { | |
1038 | VTDBus *vtd_bus; | |
1039 | VTDAddressSpace *vtd_as; | |
1040 | bool success = false; | |
1041 | ||
1042 | vtd_bus = vtd_find_as_from_bus_num(s, VTD_SID_TO_BUS(source_id)); | |
1043 | if (!vtd_bus) { | |
1044 | goto out; | |
1045 | } | |
1046 | ||
1047 | vtd_as = vtd_bus->dev_as[VTD_SID_TO_DEVFN(source_id)]; | |
1048 | if (!vtd_as) { | |
1049 | goto out; | |
1050 | } | |
1051 | ||
1052 | if (vtd_switch_address_space(vtd_as) == false) { | |
1053 | /* We switched off IOMMU region successfully. */ | |
1054 | success = true; | |
1055 | } | |
1056 | ||
1057 | out: | |
1058 | trace_vtd_pt_enable_fast_path(source_id, success); | |
1059 | } | |
1060 | ||
1da12ec4 LT |
1061 | /* Map dev to context-entry then do a paging-structures walk to do a iommu |
1062 | * translation. | |
79e2b9ae PB |
1063 | * |
1064 | * Called from RCU critical section. | |
1065 | * | |
1da12ec4 LT |
1066 | * @bus_num: The bus number |
1067 | * @devfn: The devfn, which is the combined of device and function number | |
1068 | * @is_write: The access is a write operation | |
1069 | * @entry: IOMMUTLBEntry that contain the addr to be translated and result | |
b9313021 PX |
1070 | * |
1071 | * Returns true if translation is successful, otherwise false. | |
1da12ec4 | 1072 | */ |
b9313021 | 1073 | static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, |
1da12ec4 LT |
1074 | uint8_t devfn, hwaddr addr, bool is_write, |
1075 | IOMMUTLBEntry *entry) | |
1076 | { | |
d92fa2dc | 1077 | IntelIOMMUState *s = vtd_as->iommu_state; |
1da12ec4 | 1078 | VTDContextEntry ce; |
7df953bd | 1079 | uint8_t bus_num = pci_bus_num(bus); |
d92fa2dc | 1080 | VTDContextCacheEntry *cc_entry = &vtd_as->context_cache_entry; |
d66b969b | 1081 | uint64_t slpte, page_mask; |
1da12ec4 LT |
1082 | uint32_t level; |
1083 | uint16_t source_id = vtd_make_source_id(bus_num, devfn); | |
1084 | int ret_fr; | |
1085 | bool is_fpd_set = false; | |
1086 | bool reads = true; | |
1087 | bool writes = true; | |
07f7b733 | 1088 | uint8_t access_flags; |
b5a280c0 | 1089 | VTDIOTLBEntry *iotlb_entry; |
1da12ec4 | 1090 | |
046ab7e9 PX |
1091 | /* |
1092 | * We have standalone memory region for interrupt addresses, we | |
1093 | * should never receive translation requests in this region. | |
1094 | */ | |
1095 | assert(!vtd_is_interrupt_addr(addr)); | |
1096 | ||
b5a280c0 LT |
1097 | /* Try to fetch slpte form IOTLB */ |
1098 | iotlb_entry = vtd_lookup_iotlb(s, source_id, addr); | |
1099 | if (iotlb_entry) { | |
6c441e1d PX |
1100 | trace_vtd_iotlb_page_hit(source_id, addr, iotlb_entry->slpte, |
1101 | iotlb_entry->domain_id); | |
b5a280c0 | 1102 | slpte = iotlb_entry->slpte; |
07f7b733 | 1103 | access_flags = iotlb_entry->access_flags; |
d66b969b | 1104 | page_mask = iotlb_entry->mask; |
b5a280c0 LT |
1105 | goto out; |
1106 | } | |
b9313021 | 1107 | |
d92fa2dc LT |
1108 | /* Try to fetch context-entry from cache first */ |
1109 | if (cc_entry->context_cache_gen == s->context_cache_gen) { | |
6c441e1d PX |
1110 | trace_vtd_iotlb_cc_hit(bus_num, devfn, cc_entry->context_entry.hi, |
1111 | cc_entry->context_entry.lo, | |
1112 | cc_entry->context_cache_gen); | |
d92fa2dc LT |
1113 | ce = cc_entry->context_entry; |
1114 | is_fpd_set = ce.lo & VTD_CONTEXT_ENTRY_FPD; | |
1115 | } else { | |
1116 | ret_fr = vtd_dev_to_context_entry(s, bus_num, devfn, &ce); | |
1117 | is_fpd_set = ce.lo & VTD_CONTEXT_ENTRY_FPD; | |
1118 | if (ret_fr) { | |
1119 | ret_fr = -ret_fr; | |
1120 | if (is_fpd_set && vtd_is_qualified_fault(ret_fr)) { | |
6c441e1d | 1121 | trace_vtd_fault_disabled(); |
d92fa2dc LT |
1122 | } else { |
1123 | vtd_report_dmar_fault(s, source_id, addr, ret_fr, is_write); | |
1124 | } | |
b9313021 | 1125 | goto error; |
1da12ec4 | 1126 | } |
d92fa2dc | 1127 | /* Update context-cache */ |
6c441e1d PX |
1128 | trace_vtd_iotlb_cc_update(bus_num, devfn, ce.hi, ce.lo, |
1129 | cc_entry->context_cache_gen, | |
1130 | s->context_cache_gen); | |
d92fa2dc LT |
1131 | cc_entry->context_entry = ce; |
1132 | cc_entry->context_cache_gen = s->context_cache_gen; | |
1da12ec4 LT |
1133 | } |
1134 | ||
dbaabb25 PX |
1135 | /* |
1136 | * We don't need to translate for pass-through context entries. | |
1137 | * Also, let's ignore IOTLB caching as well for PT devices. | |
1138 | */ | |
1139 | if (vtd_ce_get_type(&ce) == VTD_CONTEXT_TT_PASS_THROUGH) { | |
892721d9 | 1140 | entry->iova = addr & VTD_PAGE_MASK_4K; |
dbaabb25 | 1141 | entry->translated_addr = entry->iova; |
892721d9 | 1142 | entry->addr_mask = ~VTD_PAGE_MASK_4K; |
dbaabb25 PX |
1143 | entry->perm = IOMMU_RW; |
1144 | trace_vtd_translate_pt(source_id, entry->iova); | |
1145 | ||
1146 | /* | |
1147 | * When this happens, it means firstly caching-mode is not | |
1148 | * enabled, and this is the first passthrough translation for | |
1149 | * the device. Let's enable the fast path for passthrough. | |
1150 | * | |
1151 | * When passthrough is disabled again for the device, we can | |
1152 | * capture it via the context entry invalidation, then the | |
1153 | * IOMMU region can be swapped back. | |
1154 | */ | |
1155 | vtd_pt_enable_fast_path(s, source_id); | |
1156 | ||
b9313021 | 1157 | return true; |
dbaabb25 PX |
1158 | } |
1159 | ||
6e905564 PX |
1160 | ret_fr = vtd_iova_to_slpte(&ce, addr, is_write, &slpte, &level, |
1161 | &reads, &writes); | |
1da12ec4 LT |
1162 | if (ret_fr) { |
1163 | ret_fr = -ret_fr; | |
1164 | if (is_fpd_set && vtd_is_qualified_fault(ret_fr)) { | |
6c441e1d | 1165 | trace_vtd_fault_disabled(); |
1da12ec4 LT |
1166 | } else { |
1167 | vtd_report_dmar_fault(s, source_id, addr, ret_fr, is_write); | |
1168 | } | |
b9313021 | 1169 | goto error; |
1da12ec4 LT |
1170 | } |
1171 | ||
d66b969b | 1172 | page_mask = vtd_slpt_level_page_mask(level); |
07f7b733 | 1173 | access_flags = IOMMU_ACCESS_FLAG(reads, writes); |
b5a280c0 | 1174 | vtd_update_iotlb(s, source_id, VTD_CONTEXT_ENTRY_DID(ce.hi), addr, slpte, |
07f7b733 | 1175 | access_flags, level); |
b5a280c0 | 1176 | out: |
d66b969b JW |
1177 | entry->iova = addr & page_mask; |
1178 | entry->translated_addr = vtd_get_slpte_addr(slpte) & page_mask; | |
1179 | entry->addr_mask = ~page_mask; | |
07f7b733 | 1180 | entry->perm = access_flags; |
b9313021 PX |
1181 | return true; |
1182 | ||
1183 | error: | |
1184 | entry->iova = 0; | |
1185 | entry->translated_addr = 0; | |
1186 | entry->addr_mask = 0; | |
1187 | entry->perm = IOMMU_NONE; | |
1188 | return false; | |
1da12ec4 LT |
1189 | } |
1190 | ||
1191 | static void vtd_root_table_setup(IntelIOMMUState *s) | |
1192 | { | |
1193 | s->root = vtd_get_quad_raw(s, DMAR_RTADDR_REG); | |
1194 | s->root_extended = s->root & VTD_RTADDR_RTT; | |
1195 | s->root &= VTD_RTADDR_ADDR_MASK; | |
1196 | ||
7feb51b7 | 1197 | trace_vtd_reg_dmar_root(s->root, s->root_extended); |
1da12ec4 LT |
1198 | } |
1199 | ||
02a2cbc8 PX |
1200 | static void vtd_iec_notify_all(IntelIOMMUState *s, bool global, |
1201 | uint32_t index, uint32_t mask) | |
1202 | { | |
1203 | x86_iommu_iec_notify_all(X86_IOMMU_DEVICE(s), global, index, mask); | |
1204 | } | |
1205 | ||
a5861439 PX |
1206 | static void vtd_interrupt_remap_table_setup(IntelIOMMUState *s) |
1207 | { | |
1208 | uint64_t value = 0; | |
1209 | value = vtd_get_quad_raw(s, DMAR_IRTA_REG); | |
1210 | s->intr_size = 1UL << ((value & VTD_IRTA_SIZE_MASK) + 1); | |
1211 | s->intr_root = value & VTD_IRTA_ADDR_MASK; | |
28589311 | 1212 | s->intr_eime = value & VTD_IRTA_EIME; |
a5861439 | 1213 | |
02a2cbc8 PX |
1214 | /* Notify global invalidation */ |
1215 | vtd_iec_notify_all(s, true, 0, 0); | |
a5861439 | 1216 | |
7feb51b7 | 1217 | trace_vtd_reg_ir_root(s->intr_root, s->intr_size); |
a5861439 PX |
1218 | } |
1219 | ||
dd4d607e PX |
1220 | static void vtd_iommu_replay_all(IntelIOMMUState *s) |
1221 | { | |
1222 | IntelIOMMUNotifierNode *node; | |
1223 | ||
1224 | QLIST_FOREACH(node, &s->notifiers_list, next) { | |
1225 | memory_region_iommu_replay_all(&node->vtd_as->iommu); | |
1226 | } | |
1227 | } | |
1228 | ||
d92fa2dc LT |
1229 | static void vtd_context_global_invalidate(IntelIOMMUState *s) |
1230 | { | |
bc535e59 | 1231 | trace_vtd_inv_desc_cc_global(); |
d92fa2dc LT |
1232 | s->context_cache_gen++; |
1233 | if (s->context_cache_gen == VTD_CONTEXT_CACHE_GEN_MAX) { | |
1234 | vtd_reset_context_cache(s); | |
1235 | } | |
dbaabb25 | 1236 | vtd_switch_address_space_all(s); |
dd4d607e PX |
1237 | /* |
1238 | * From VT-d spec 6.5.2.1, a global context entry invalidation | |
1239 | * should be followed by a IOTLB global invalidation, so we should | |
1240 | * be safe even without this. Hoewever, let's replay the region as | |
1241 | * well to be safer, and go back here when we need finer tunes for | |
1242 | * VT-d emulation codes. | |
1243 | */ | |
1244 | vtd_iommu_replay_all(s); | |
d92fa2dc LT |
1245 | } |
1246 | ||
1247 | /* Do a context-cache device-selective invalidation. | |
1248 | * @func_mask: FM field after shifting | |
1249 | */ | |
1250 | static void vtd_context_device_invalidate(IntelIOMMUState *s, | |
1251 | uint16_t source_id, | |
1252 | uint16_t func_mask) | |
1253 | { | |
1254 | uint16_t mask; | |
7df953bd | 1255 | VTDBus *vtd_bus; |
d92fa2dc | 1256 | VTDAddressSpace *vtd_as; |
bc535e59 | 1257 | uint8_t bus_n, devfn; |
d92fa2dc LT |
1258 | uint16_t devfn_it; |
1259 | ||
bc535e59 PX |
1260 | trace_vtd_inv_desc_cc_devices(source_id, func_mask); |
1261 | ||
d92fa2dc LT |
1262 | switch (func_mask & 3) { |
1263 | case 0: | |
1264 | mask = 0; /* No bits in the SID field masked */ | |
1265 | break; | |
1266 | case 1: | |
1267 | mask = 4; /* Mask bit 2 in the SID field */ | |
1268 | break; | |
1269 | case 2: | |
1270 | mask = 6; /* Mask bit 2:1 in the SID field */ | |
1271 | break; | |
1272 | case 3: | |
1273 | mask = 7; /* Mask bit 2:0 in the SID field */ | |
1274 | break; | |
1275 | } | |
6cb99acc | 1276 | mask = ~mask; |
bc535e59 PX |
1277 | |
1278 | bus_n = VTD_SID_TO_BUS(source_id); | |
1279 | vtd_bus = vtd_find_as_from_bus_num(s, bus_n); | |
7df953bd | 1280 | if (vtd_bus) { |
d92fa2dc | 1281 | devfn = VTD_SID_TO_DEVFN(source_id); |
04af0e18 | 1282 | for (devfn_it = 0; devfn_it < X86_IOMMU_PCI_DEVFN_MAX; ++devfn_it) { |
7df953bd | 1283 | vtd_as = vtd_bus->dev_as[devfn_it]; |
d92fa2dc | 1284 | if (vtd_as && ((devfn_it & mask) == (devfn & mask))) { |
bc535e59 PX |
1285 | trace_vtd_inv_desc_cc_device(bus_n, VTD_PCI_SLOT(devfn_it), |
1286 | VTD_PCI_FUNC(devfn_it)); | |
d92fa2dc | 1287 | vtd_as->context_cache_entry.context_cache_gen = 0; |
dbaabb25 PX |
1288 | /* |
1289 | * Do switch address space when needed, in case if the | |
1290 | * device passthrough bit is switched. | |
1291 | */ | |
1292 | vtd_switch_address_space(vtd_as); | |
dd4d607e PX |
1293 | /* |
1294 | * So a device is moving out of (or moving into) a | |
1295 | * domain, a replay() suites here to notify all the | |
1296 | * IOMMU_NOTIFIER_MAP registers about this change. | |
1297 | * This won't bring bad even if we have no such | |
1298 | * notifier registered - the IOMMU notification | |
1299 | * framework will skip MAP notifications if that | |
1300 | * happened. | |
1301 | */ | |
1302 | memory_region_iommu_replay_all(&vtd_as->iommu); | |
d92fa2dc LT |
1303 | } |
1304 | } | |
1305 | } | |
1306 | } | |
1307 | ||
1da12ec4 LT |
1308 | /* Context-cache invalidation |
1309 | * Returns the Context Actual Invalidation Granularity. | |
1310 | * @val: the content of the CCMD_REG | |
1311 | */ | |
1312 | static uint64_t vtd_context_cache_invalidate(IntelIOMMUState *s, uint64_t val) | |
1313 | { | |
1314 | uint64_t caig; | |
1315 | uint64_t type = val & VTD_CCMD_CIRG_MASK; | |
1316 | ||
1317 | switch (type) { | |
d92fa2dc | 1318 | case VTD_CCMD_DOMAIN_INVL: |
d92fa2dc | 1319 | /* Fall through */ |
1da12ec4 | 1320 | case VTD_CCMD_GLOBAL_INVL: |
1da12ec4 | 1321 | caig = VTD_CCMD_GLOBAL_INVL_A; |
d92fa2dc | 1322 | vtd_context_global_invalidate(s); |
1da12ec4 LT |
1323 | break; |
1324 | ||
1325 | case VTD_CCMD_DEVICE_INVL: | |
1da12ec4 | 1326 | caig = VTD_CCMD_DEVICE_INVL_A; |
d92fa2dc | 1327 | vtd_context_device_invalidate(s, VTD_CCMD_SID(val), VTD_CCMD_FM(val)); |
1da12ec4 LT |
1328 | break; |
1329 | ||
1330 | default: | |
7feb51b7 | 1331 | trace_vtd_err("Context cache invalidate type error."); |
1da12ec4 LT |
1332 | caig = 0; |
1333 | } | |
1334 | return caig; | |
1335 | } | |
1336 | ||
b5a280c0 LT |
1337 | static void vtd_iotlb_global_invalidate(IntelIOMMUState *s) |
1338 | { | |
7feb51b7 | 1339 | trace_vtd_inv_desc_iotlb_global(); |
b5a280c0 | 1340 | vtd_reset_iotlb(s); |
dd4d607e | 1341 | vtd_iommu_replay_all(s); |
b5a280c0 LT |
1342 | } |
1343 | ||
1344 | static void vtd_iotlb_domain_invalidate(IntelIOMMUState *s, uint16_t domain_id) | |
1345 | { | |
dd4d607e PX |
1346 | IntelIOMMUNotifierNode *node; |
1347 | VTDContextEntry ce; | |
1348 | VTDAddressSpace *vtd_as; | |
1349 | ||
7feb51b7 PX |
1350 | trace_vtd_inv_desc_iotlb_domain(domain_id); |
1351 | ||
b5a280c0 LT |
1352 | g_hash_table_foreach_remove(s->iotlb, vtd_hash_remove_by_domain, |
1353 | &domain_id); | |
dd4d607e PX |
1354 | |
1355 | QLIST_FOREACH(node, &s->notifiers_list, next) { | |
1356 | vtd_as = node->vtd_as; | |
1357 | if (!vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus), | |
1358 | vtd_as->devfn, &ce) && | |
1359 | domain_id == VTD_CONTEXT_ENTRY_DID(ce.hi)) { | |
1360 | memory_region_iommu_replay_all(&vtd_as->iommu); | |
1361 | } | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | static int vtd_page_invalidate_notify_hook(IOMMUTLBEntry *entry, | |
1366 | void *private) | |
1367 | { | |
3df9d748 | 1368 | memory_region_notify_iommu((IOMMUMemoryRegion *)private, *entry); |
dd4d607e PX |
1369 | return 0; |
1370 | } | |
1371 | ||
1372 | static void vtd_iotlb_page_invalidate_notify(IntelIOMMUState *s, | |
1373 | uint16_t domain_id, hwaddr addr, | |
1374 | uint8_t am) | |
1375 | { | |
1376 | IntelIOMMUNotifierNode *node; | |
1377 | VTDContextEntry ce; | |
1378 | int ret; | |
1379 | ||
1380 | QLIST_FOREACH(node, &(s->notifiers_list), next) { | |
1381 | VTDAddressSpace *vtd_as = node->vtd_as; | |
1382 | ret = vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus), | |
1383 | vtd_as->devfn, &ce); | |
1384 | if (!ret && domain_id == VTD_CONTEXT_ENTRY_DID(ce.hi)) { | |
1385 | vtd_page_walk(&ce, addr, addr + (1 << am) * VTD_PAGE_SIZE, | |
1386 | vtd_page_invalidate_notify_hook, | |
1387 | (void *)&vtd_as->iommu, true); | |
1388 | } | |
1389 | } | |
b5a280c0 LT |
1390 | } |
1391 | ||
1392 | static void vtd_iotlb_page_invalidate(IntelIOMMUState *s, uint16_t domain_id, | |
1393 | hwaddr addr, uint8_t am) | |
1394 | { | |
1395 | VTDIOTLBPageInvInfo info; | |
1396 | ||
7feb51b7 PX |
1397 | trace_vtd_inv_desc_iotlb_pages(domain_id, addr, am); |
1398 | ||
b5a280c0 LT |
1399 | assert(am <= VTD_MAMV); |
1400 | info.domain_id = domain_id; | |
d66b969b | 1401 | info.addr = addr; |
b5a280c0 LT |
1402 | info.mask = ~((1 << am) - 1); |
1403 | g_hash_table_foreach_remove(s->iotlb, vtd_hash_remove_by_page, &info); | |
dd4d607e | 1404 | vtd_iotlb_page_invalidate_notify(s, domain_id, addr, am); |
b5a280c0 LT |
1405 | } |
1406 | ||
1da12ec4 LT |
1407 | /* Flush IOTLB |
1408 | * Returns the IOTLB Actual Invalidation Granularity. | |
1409 | * @val: the content of the IOTLB_REG | |
1410 | */ | |
1411 | static uint64_t vtd_iotlb_flush(IntelIOMMUState *s, uint64_t val) | |
1412 | { | |
1413 | uint64_t iaig; | |
1414 | uint64_t type = val & VTD_TLB_FLUSH_GRANU_MASK; | |
b5a280c0 LT |
1415 | uint16_t domain_id; |
1416 | hwaddr addr; | |
1417 | uint8_t am; | |
1da12ec4 LT |
1418 | |
1419 | switch (type) { | |
1420 | case VTD_TLB_GLOBAL_FLUSH: | |
1da12ec4 | 1421 | iaig = VTD_TLB_GLOBAL_FLUSH_A; |
b5a280c0 | 1422 | vtd_iotlb_global_invalidate(s); |
1da12ec4 LT |
1423 | break; |
1424 | ||
1425 | case VTD_TLB_DSI_FLUSH: | |
b5a280c0 | 1426 | domain_id = VTD_TLB_DID(val); |
1da12ec4 | 1427 | iaig = VTD_TLB_DSI_FLUSH_A; |
b5a280c0 | 1428 | vtd_iotlb_domain_invalidate(s, domain_id); |
1da12ec4 LT |
1429 | break; |
1430 | ||
1431 | case VTD_TLB_PSI_FLUSH: | |
b5a280c0 LT |
1432 | domain_id = VTD_TLB_DID(val); |
1433 | addr = vtd_get_quad_raw(s, DMAR_IVA_REG); | |
1434 | am = VTD_IVA_AM(addr); | |
1435 | addr = VTD_IVA_ADDR(addr); | |
b5a280c0 | 1436 | if (am > VTD_MAMV) { |
7feb51b7 | 1437 | trace_vtd_err("IOTLB PSI flush: address mask overflow."); |
b5a280c0 LT |
1438 | iaig = 0; |
1439 | break; | |
1440 | } | |
1da12ec4 | 1441 | iaig = VTD_TLB_PSI_FLUSH_A; |
b5a280c0 | 1442 | vtd_iotlb_page_invalidate(s, domain_id, addr, am); |
1da12ec4 LT |
1443 | break; |
1444 | ||
1445 | default: | |
7feb51b7 | 1446 | trace_vtd_err("IOTLB flush: invalid granularity."); |
1da12ec4 LT |
1447 | iaig = 0; |
1448 | } | |
1449 | return iaig; | |
1450 | } | |
1451 | ||
8991c460 | 1452 | static void vtd_fetch_inv_desc(IntelIOMMUState *s); |
ed7b8fbc LT |
1453 | |
1454 | static inline bool vtd_queued_inv_disable_check(IntelIOMMUState *s) | |
1455 | { | |
1456 | return s->qi_enabled && (s->iq_tail == s->iq_head) && | |
1457 | (s->iq_last_desc_type == VTD_INV_DESC_WAIT); | |
1458 | } | |
1459 | ||
1460 | static void vtd_handle_gcmd_qie(IntelIOMMUState *s, bool en) | |
1461 | { | |
1462 | uint64_t iqa_val = vtd_get_quad_raw(s, DMAR_IQA_REG); | |
1463 | ||
7feb51b7 PX |
1464 | trace_vtd_inv_qi_enable(en); |
1465 | ||
ed7b8fbc | 1466 | if (en) { |
8991c460 LP |
1467 | s->iq = iqa_val & VTD_IQA_IQA_MASK; |
1468 | /* 2^(x+8) entries */ | |
1469 | s->iq_size = 1UL << ((iqa_val & VTD_IQA_QS) + 8); | |
1470 | s->qi_enabled = true; | |
1471 | trace_vtd_inv_qi_setup(s->iq, s->iq_size); | |
1472 | /* Ok - report back to driver */ | |
1473 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_QIES); | |
1474 | ||
1475 | if (s->iq_tail != 0) { | |
1476 | /* | |
1477 | * This is a spec violation but Windows guests are known to set up | |
1478 | * Queued Invalidation this way so we allow the write and process | |
1479 | * Invalidation Descriptors right away. | |
1480 | */ | |
1481 | trace_vtd_warn_invalid_qi_tail(s->iq_tail); | |
1482 | if (!(vtd_get_long_raw(s, DMAR_FSTS_REG) & VTD_FSTS_IQE)) { | |
1483 | vtd_fetch_inv_desc(s); | |
1484 | } | |
ed7b8fbc LT |
1485 | } |
1486 | } else { | |
1487 | if (vtd_queued_inv_disable_check(s)) { | |
1488 | /* disable Queued Invalidation */ | |
1489 | vtd_set_quad_raw(s, DMAR_IQH_REG, 0); | |
1490 | s->iq_head = 0; | |
1491 | s->qi_enabled = false; | |
1492 | /* Ok - report back to driver */ | |
1493 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, VTD_GSTS_QIES, 0); | |
1494 | } else { | |
7feb51b7 | 1495 | trace_vtd_err_qi_disable(s->iq_head, s->iq_tail, s->iq_last_desc_type); |
ed7b8fbc LT |
1496 | } |
1497 | } | |
1498 | } | |
1499 | ||
1da12ec4 LT |
1500 | /* Set Root Table Pointer */ |
1501 | static void vtd_handle_gcmd_srtp(IntelIOMMUState *s) | |
1502 | { | |
1da12ec4 LT |
1503 | vtd_root_table_setup(s); |
1504 | /* Ok - report back to driver */ | |
1505 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_RTPS); | |
1506 | } | |
1507 | ||
a5861439 PX |
1508 | /* Set Interrupt Remap Table Pointer */ |
1509 | static void vtd_handle_gcmd_sirtp(IntelIOMMUState *s) | |
1510 | { | |
a5861439 PX |
1511 | vtd_interrupt_remap_table_setup(s); |
1512 | /* Ok - report back to driver */ | |
1513 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_IRTPS); | |
1514 | } | |
1515 | ||
1da12ec4 LT |
1516 | /* Handle Translation Enable/Disable */ |
1517 | static void vtd_handle_gcmd_te(IntelIOMMUState *s, bool en) | |
1518 | { | |
558e0024 PX |
1519 | if (s->dmar_enabled == en) { |
1520 | return; | |
1521 | } | |
1522 | ||
7feb51b7 | 1523 | trace_vtd_dmar_enable(en); |
1da12ec4 LT |
1524 | |
1525 | if (en) { | |
1526 | s->dmar_enabled = true; | |
1527 | /* Ok - report back to driver */ | |
1528 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_TES); | |
1529 | } else { | |
1530 | s->dmar_enabled = false; | |
1531 | ||
1532 | /* Clear the index of Fault Recording Register */ | |
1533 | s->next_frcd_reg = 0; | |
1534 | /* Ok - report back to driver */ | |
1535 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, VTD_GSTS_TES, 0); | |
1536 | } | |
558e0024 PX |
1537 | |
1538 | vtd_switch_address_space_all(s); | |
1da12ec4 LT |
1539 | } |
1540 | ||
80de52ba PX |
1541 | /* Handle Interrupt Remap Enable/Disable */ |
1542 | static void vtd_handle_gcmd_ire(IntelIOMMUState *s, bool en) | |
1543 | { | |
7feb51b7 | 1544 | trace_vtd_ir_enable(en); |
80de52ba PX |
1545 | |
1546 | if (en) { | |
1547 | s->intr_enabled = true; | |
1548 | /* Ok - report back to driver */ | |
1549 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_IRES); | |
1550 | } else { | |
1551 | s->intr_enabled = false; | |
1552 | /* Ok - report back to driver */ | |
1553 | vtd_set_clear_mask_long(s, DMAR_GSTS_REG, VTD_GSTS_IRES, 0); | |
1554 | } | |
1555 | } | |
1556 | ||
1da12ec4 LT |
1557 | /* Handle write to Global Command Register */ |
1558 | static void vtd_handle_gcmd_write(IntelIOMMUState *s) | |
1559 | { | |
1560 | uint32_t status = vtd_get_long_raw(s, DMAR_GSTS_REG); | |
1561 | uint32_t val = vtd_get_long_raw(s, DMAR_GCMD_REG); | |
1562 | uint32_t changed = status ^ val; | |
1563 | ||
7feb51b7 | 1564 | trace_vtd_reg_write_gcmd(status, val); |
1da12ec4 LT |
1565 | if (changed & VTD_GCMD_TE) { |
1566 | /* Translation enable/disable */ | |
1567 | vtd_handle_gcmd_te(s, val & VTD_GCMD_TE); | |
1568 | } | |
1569 | if (val & VTD_GCMD_SRTP) { | |
1570 | /* Set/update the root-table pointer */ | |
1571 | vtd_handle_gcmd_srtp(s); | |
1572 | } | |
ed7b8fbc LT |
1573 | if (changed & VTD_GCMD_QIE) { |
1574 | /* Queued Invalidation Enable */ | |
1575 | vtd_handle_gcmd_qie(s, val & VTD_GCMD_QIE); | |
1576 | } | |
a5861439 PX |
1577 | if (val & VTD_GCMD_SIRTP) { |
1578 | /* Set/update the interrupt remapping root-table pointer */ | |
1579 | vtd_handle_gcmd_sirtp(s); | |
1580 | } | |
80de52ba PX |
1581 | if (changed & VTD_GCMD_IRE) { |
1582 | /* Interrupt remap enable/disable */ | |
1583 | vtd_handle_gcmd_ire(s, val & VTD_GCMD_IRE); | |
1584 | } | |
1da12ec4 LT |
1585 | } |
1586 | ||
1587 | /* Handle write to Context Command Register */ | |
1588 | static void vtd_handle_ccmd_write(IntelIOMMUState *s) | |
1589 | { | |
1590 | uint64_t ret; | |
1591 | uint64_t val = vtd_get_quad_raw(s, DMAR_CCMD_REG); | |
1592 | ||
1593 | /* Context-cache invalidation request */ | |
1594 | if (val & VTD_CCMD_ICC) { | |
ed7b8fbc | 1595 | if (s->qi_enabled) { |
7feb51b7 PX |
1596 | trace_vtd_err("Queued Invalidation enabled, " |
1597 | "should not use register-based invalidation"); | |
ed7b8fbc LT |
1598 | return; |
1599 | } | |
1da12ec4 LT |
1600 | ret = vtd_context_cache_invalidate(s, val); |
1601 | /* Invalidation completed. Change something to show */ | |
1602 | vtd_set_clear_mask_quad(s, DMAR_CCMD_REG, VTD_CCMD_ICC, 0ULL); | |
1603 | ret = vtd_set_clear_mask_quad(s, DMAR_CCMD_REG, VTD_CCMD_CAIG_MASK, | |
1604 | ret); | |
1da12ec4 LT |
1605 | } |
1606 | } | |
1607 | ||
1608 | /* Handle write to IOTLB Invalidation Register */ | |
1609 | static void vtd_handle_iotlb_write(IntelIOMMUState *s) | |
1610 | { | |
1611 | uint64_t ret; | |
1612 | uint64_t val = vtd_get_quad_raw(s, DMAR_IOTLB_REG); | |
1613 | ||
1614 | /* IOTLB invalidation request */ | |
1615 | if (val & VTD_TLB_IVT) { | |
ed7b8fbc | 1616 | if (s->qi_enabled) { |
7feb51b7 PX |
1617 | trace_vtd_err("Queued Invalidation enabled, " |
1618 | "should not use register-based invalidation."); | |
ed7b8fbc LT |
1619 | return; |
1620 | } | |
1da12ec4 LT |
1621 | ret = vtd_iotlb_flush(s, val); |
1622 | /* Invalidation completed. Change something to show */ | |
1623 | vtd_set_clear_mask_quad(s, DMAR_IOTLB_REG, VTD_TLB_IVT, 0ULL); | |
1624 | ret = vtd_set_clear_mask_quad(s, DMAR_IOTLB_REG, | |
1625 | VTD_TLB_FLUSH_GRANU_MASK_A, ret); | |
1da12ec4 LT |
1626 | } |
1627 | } | |
1628 | ||
ed7b8fbc LT |
1629 | /* Fetch an Invalidation Descriptor from the Invalidation Queue */ |
1630 | static bool vtd_get_inv_desc(dma_addr_t base_addr, uint32_t offset, | |
1631 | VTDInvDesc *inv_desc) | |
1632 | { | |
1633 | dma_addr_t addr = base_addr + offset * sizeof(*inv_desc); | |
1634 | if (dma_memory_read(&address_space_memory, addr, inv_desc, | |
1635 | sizeof(*inv_desc))) { | |
7feb51b7 | 1636 | trace_vtd_err("Read INV DESC failed."); |
ed7b8fbc LT |
1637 | inv_desc->lo = 0; |
1638 | inv_desc->hi = 0; | |
ed7b8fbc LT |
1639 | return false; |
1640 | } | |
1641 | inv_desc->lo = le64_to_cpu(inv_desc->lo); | |
1642 | inv_desc->hi = le64_to_cpu(inv_desc->hi); | |
1643 | return true; | |
1644 | } | |
1645 | ||
1646 | static bool vtd_process_wait_desc(IntelIOMMUState *s, VTDInvDesc *inv_desc) | |
1647 | { | |
1648 | if ((inv_desc->hi & VTD_INV_DESC_WAIT_RSVD_HI) || | |
1649 | (inv_desc->lo & VTD_INV_DESC_WAIT_RSVD_LO)) { | |
bc535e59 | 1650 | trace_vtd_inv_desc_wait_invalid(inv_desc->hi, inv_desc->lo); |
ed7b8fbc LT |
1651 | return false; |
1652 | } | |
1653 | if (inv_desc->lo & VTD_INV_DESC_WAIT_SW) { | |
1654 | /* Status Write */ | |
1655 | uint32_t status_data = (uint32_t)(inv_desc->lo >> | |
1656 | VTD_INV_DESC_WAIT_DATA_SHIFT); | |
1657 | ||
1658 | assert(!(inv_desc->lo & VTD_INV_DESC_WAIT_IF)); | |
1659 | ||
1660 | /* FIXME: need to be masked with HAW? */ | |
1661 | dma_addr_t status_addr = inv_desc->hi; | |
bc535e59 | 1662 | trace_vtd_inv_desc_wait_sw(status_addr, status_data); |
ed7b8fbc LT |
1663 | status_data = cpu_to_le32(status_data); |
1664 | if (dma_memory_write(&address_space_memory, status_addr, &status_data, | |
1665 | sizeof(status_data))) { | |
bc535e59 | 1666 | trace_vtd_inv_desc_wait_write_fail(inv_desc->hi, inv_desc->lo); |
ed7b8fbc LT |
1667 | return false; |
1668 | } | |
1669 | } else if (inv_desc->lo & VTD_INV_DESC_WAIT_IF) { | |
1670 | /* Interrupt flag */ | |
ed7b8fbc LT |
1671 | vtd_generate_completion_event(s); |
1672 | } else { | |
bc535e59 | 1673 | trace_vtd_inv_desc_wait_invalid(inv_desc->hi, inv_desc->lo); |
ed7b8fbc LT |
1674 | return false; |
1675 | } | |
1676 | return true; | |
1677 | } | |
1678 | ||
d92fa2dc LT |
1679 | static bool vtd_process_context_cache_desc(IntelIOMMUState *s, |
1680 | VTDInvDesc *inv_desc) | |
1681 | { | |
bc535e59 PX |
1682 | uint16_t sid, fmask; |
1683 | ||
d92fa2dc | 1684 | if ((inv_desc->lo & VTD_INV_DESC_CC_RSVD) || inv_desc->hi) { |
bc535e59 | 1685 | trace_vtd_inv_desc_cc_invalid(inv_desc->hi, inv_desc->lo); |
d92fa2dc LT |
1686 | return false; |
1687 | } | |
1688 | switch (inv_desc->lo & VTD_INV_DESC_CC_G) { | |
1689 | case VTD_INV_DESC_CC_DOMAIN: | |
bc535e59 PX |
1690 | trace_vtd_inv_desc_cc_domain( |
1691 | (uint16_t)VTD_INV_DESC_CC_DID(inv_desc->lo)); | |
d92fa2dc LT |
1692 | /* Fall through */ |
1693 | case VTD_INV_DESC_CC_GLOBAL: | |
d92fa2dc LT |
1694 | vtd_context_global_invalidate(s); |
1695 | break; | |
1696 | ||
1697 | case VTD_INV_DESC_CC_DEVICE: | |
bc535e59 PX |
1698 | sid = VTD_INV_DESC_CC_SID(inv_desc->lo); |
1699 | fmask = VTD_INV_DESC_CC_FM(inv_desc->lo); | |
1700 | vtd_context_device_invalidate(s, sid, fmask); | |
d92fa2dc LT |
1701 | break; |
1702 | ||
1703 | default: | |
bc535e59 | 1704 | trace_vtd_inv_desc_cc_invalid(inv_desc->hi, inv_desc->lo); |
d92fa2dc LT |
1705 | return false; |
1706 | } | |
1707 | return true; | |
1708 | } | |
1709 | ||
b5a280c0 LT |
1710 | static bool vtd_process_iotlb_desc(IntelIOMMUState *s, VTDInvDesc *inv_desc) |
1711 | { | |
1712 | uint16_t domain_id; | |
1713 | uint8_t am; | |
1714 | hwaddr addr; | |
1715 | ||
1716 | if ((inv_desc->lo & VTD_INV_DESC_IOTLB_RSVD_LO) || | |
1717 | (inv_desc->hi & VTD_INV_DESC_IOTLB_RSVD_HI)) { | |
bc535e59 | 1718 | trace_vtd_inv_desc_iotlb_invalid(inv_desc->hi, inv_desc->lo); |
b5a280c0 LT |
1719 | return false; |
1720 | } | |
1721 | ||
1722 | switch (inv_desc->lo & VTD_INV_DESC_IOTLB_G) { | |
1723 | case VTD_INV_DESC_IOTLB_GLOBAL: | |
b5a280c0 LT |
1724 | vtd_iotlb_global_invalidate(s); |
1725 | break; | |
1726 | ||
1727 | case VTD_INV_DESC_IOTLB_DOMAIN: | |
1728 | domain_id = VTD_INV_DESC_IOTLB_DID(inv_desc->lo); | |
b5a280c0 LT |
1729 | vtd_iotlb_domain_invalidate(s, domain_id); |
1730 | break; | |
1731 | ||
1732 | case VTD_INV_DESC_IOTLB_PAGE: | |
1733 | domain_id = VTD_INV_DESC_IOTLB_DID(inv_desc->lo); | |
1734 | addr = VTD_INV_DESC_IOTLB_ADDR(inv_desc->hi); | |
1735 | am = VTD_INV_DESC_IOTLB_AM(inv_desc->hi); | |
b5a280c0 | 1736 | if (am > VTD_MAMV) { |
bc535e59 | 1737 | trace_vtd_inv_desc_iotlb_invalid(inv_desc->hi, inv_desc->lo); |
b5a280c0 LT |
1738 | return false; |
1739 | } | |
1740 | vtd_iotlb_page_invalidate(s, domain_id, addr, am); | |
1741 | break; | |
1742 | ||
1743 | default: | |
bc535e59 | 1744 | trace_vtd_inv_desc_iotlb_invalid(inv_desc->hi, inv_desc->lo); |
b5a280c0 LT |
1745 | return false; |
1746 | } | |
1747 | return true; | |
1748 | } | |
1749 | ||
02a2cbc8 PX |
1750 | static bool vtd_process_inv_iec_desc(IntelIOMMUState *s, |
1751 | VTDInvDesc *inv_desc) | |
1752 | { | |
7feb51b7 PX |
1753 | trace_vtd_inv_desc_iec(inv_desc->iec.granularity, |
1754 | inv_desc->iec.index, | |
1755 | inv_desc->iec.index_mask); | |
02a2cbc8 PX |
1756 | |
1757 | vtd_iec_notify_all(s, !inv_desc->iec.granularity, | |
1758 | inv_desc->iec.index, | |
1759 | inv_desc->iec.index_mask); | |
554f5e16 JW |
1760 | return true; |
1761 | } | |
1762 | ||
1763 | static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s, | |
1764 | VTDInvDesc *inv_desc) | |
1765 | { | |
1766 | VTDAddressSpace *vtd_dev_as; | |
1767 | IOMMUTLBEntry entry; | |
1768 | struct VTDBus *vtd_bus; | |
1769 | hwaddr addr; | |
1770 | uint64_t sz; | |
1771 | uint16_t sid; | |
1772 | uint8_t devfn; | |
1773 | bool size; | |
1774 | uint8_t bus_num; | |
1775 | ||
1776 | addr = VTD_INV_DESC_DEVICE_IOTLB_ADDR(inv_desc->hi); | |
1777 | sid = VTD_INV_DESC_DEVICE_IOTLB_SID(inv_desc->lo); | |
1778 | devfn = sid & 0xff; | |
1779 | bus_num = sid >> 8; | |
1780 | size = VTD_INV_DESC_DEVICE_IOTLB_SIZE(inv_desc->hi); | |
1781 | ||
1782 | if ((inv_desc->lo & VTD_INV_DESC_DEVICE_IOTLB_RSVD_LO) || | |
1783 | (inv_desc->hi & VTD_INV_DESC_DEVICE_IOTLB_RSVD_HI)) { | |
7feb51b7 | 1784 | trace_vtd_inv_desc_iotlb_invalid(inv_desc->hi, inv_desc->lo); |
554f5e16 JW |
1785 | return false; |
1786 | } | |
1787 | ||
1788 | vtd_bus = vtd_find_as_from_bus_num(s, bus_num); | |
1789 | if (!vtd_bus) { | |
1790 | goto done; | |
1791 | } | |
1792 | ||
1793 | vtd_dev_as = vtd_bus->dev_as[devfn]; | |
1794 | if (!vtd_dev_as) { | |
1795 | goto done; | |
1796 | } | |
1797 | ||
04eb6247 JW |
1798 | /* According to ATS spec table 2.4: |
1799 | * S = 0, bits 15:12 = xxxx range size: 4K | |
1800 | * S = 1, bits 15:12 = xxx0 range size: 8K | |
1801 | * S = 1, bits 15:12 = xx01 range size: 16K | |
1802 | * S = 1, bits 15:12 = x011 range size: 32K | |
1803 | * S = 1, bits 15:12 = 0111 range size: 64K | |
1804 | * ... | |
1805 | */ | |
554f5e16 | 1806 | if (size) { |
04eb6247 | 1807 | sz = (VTD_PAGE_SIZE * 2) << cto64(addr >> VTD_PAGE_SHIFT); |
554f5e16 JW |
1808 | addr &= ~(sz - 1); |
1809 | } else { | |
1810 | sz = VTD_PAGE_SIZE; | |
1811 | } | |
02a2cbc8 | 1812 | |
554f5e16 JW |
1813 | entry.target_as = &vtd_dev_as->as; |
1814 | entry.addr_mask = sz - 1; | |
1815 | entry.iova = addr; | |
1816 | entry.perm = IOMMU_NONE; | |
1817 | entry.translated_addr = 0; | |
10315b9b | 1818 | memory_region_notify_iommu(&vtd_dev_as->iommu, entry); |
554f5e16 JW |
1819 | |
1820 | done: | |
02a2cbc8 PX |
1821 | return true; |
1822 | } | |
1823 | ||
ed7b8fbc LT |
1824 | static bool vtd_process_inv_desc(IntelIOMMUState *s) |
1825 | { | |
1826 | VTDInvDesc inv_desc; | |
1827 | uint8_t desc_type; | |
1828 | ||
7feb51b7 | 1829 | trace_vtd_inv_qi_head(s->iq_head); |
ed7b8fbc LT |
1830 | if (!vtd_get_inv_desc(s->iq, s->iq_head, &inv_desc)) { |
1831 | s->iq_last_desc_type = VTD_INV_DESC_NONE; | |
1832 | return false; | |
1833 | } | |
1834 | desc_type = inv_desc.lo & VTD_INV_DESC_TYPE; | |
1835 | /* FIXME: should update at first or at last? */ | |
1836 | s->iq_last_desc_type = desc_type; | |
1837 | ||
1838 | switch (desc_type) { | |
1839 | case VTD_INV_DESC_CC: | |
bc535e59 | 1840 | trace_vtd_inv_desc("context-cache", inv_desc.hi, inv_desc.lo); |
d92fa2dc LT |
1841 | if (!vtd_process_context_cache_desc(s, &inv_desc)) { |
1842 | return false; | |
1843 | } | |
ed7b8fbc LT |
1844 | break; |
1845 | ||
1846 | case VTD_INV_DESC_IOTLB: | |
bc535e59 | 1847 | trace_vtd_inv_desc("iotlb", inv_desc.hi, inv_desc.lo); |
b5a280c0 LT |
1848 | if (!vtd_process_iotlb_desc(s, &inv_desc)) { |
1849 | return false; | |
1850 | } | |
ed7b8fbc LT |
1851 | break; |
1852 | ||
1853 | case VTD_INV_DESC_WAIT: | |
bc535e59 | 1854 | trace_vtd_inv_desc("wait", inv_desc.hi, inv_desc.lo); |
ed7b8fbc LT |
1855 | if (!vtd_process_wait_desc(s, &inv_desc)) { |
1856 | return false; | |
1857 | } | |
1858 | break; | |
1859 | ||
b7910472 | 1860 | case VTD_INV_DESC_IEC: |
bc535e59 | 1861 | trace_vtd_inv_desc("iec", inv_desc.hi, inv_desc.lo); |
02a2cbc8 PX |
1862 | if (!vtd_process_inv_iec_desc(s, &inv_desc)) { |
1863 | return false; | |
1864 | } | |
b7910472 PX |
1865 | break; |
1866 | ||
554f5e16 | 1867 | case VTD_INV_DESC_DEVICE: |
7feb51b7 | 1868 | trace_vtd_inv_desc("device", inv_desc.hi, inv_desc.lo); |
554f5e16 JW |
1869 | if (!vtd_process_device_iotlb_desc(s, &inv_desc)) { |
1870 | return false; | |
1871 | } | |
1872 | break; | |
1873 | ||
ed7b8fbc | 1874 | default: |
bc535e59 | 1875 | trace_vtd_inv_desc_invalid(inv_desc.hi, inv_desc.lo); |
ed7b8fbc LT |
1876 | return false; |
1877 | } | |
1878 | s->iq_head++; | |
1879 | if (s->iq_head == s->iq_size) { | |
1880 | s->iq_head = 0; | |
1881 | } | |
1882 | return true; | |
1883 | } | |
1884 | ||
1885 | /* Try to fetch and process more Invalidation Descriptors */ | |
1886 | static void vtd_fetch_inv_desc(IntelIOMMUState *s) | |
1887 | { | |
7feb51b7 PX |
1888 | trace_vtd_inv_qi_fetch(); |
1889 | ||
ed7b8fbc LT |
1890 | if (s->iq_tail >= s->iq_size) { |
1891 | /* Detects an invalid Tail pointer */ | |
7feb51b7 | 1892 | trace_vtd_err_qi_tail(s->iq_tail, s->iq_size); |
ed7b8fbc LT |
1893 | vtd_handle_inv_queue_error(s); |
1894 | return; | |
1895 | } | |
1896 | while (s->iq_head != s->iq_tail) { | |
1897 | if (!vtd_process_inv_desc(s)) { | |
1898 | /* Invalidation Queue Errors */ | |
1899 | vtd_handle_inv_queue_error(s); | |
1900 | break; | |
1901 | } | |
1902 | /* Must update the IQH_REG in time */ | |
1903 | vtd_set_quad_raw(s, DMAR_IQH_REG, | |
1904 | (((uint64_t)(s->iq_head)) << VTD_IQH_QH_SHIFT) & | |
1905 | VTD_IQH_QH_MASK); | |
1906 | } | |
1907 | } | |
1908 | ||
1909 | /* Handle write to Invalidation Queue Tail Register */ | |
1910 | static void vtd_handle_iqt_write(IntelIOMMUState *s) | |
1911 | { | |
1912 | uint64_t val = vtd_get_quad_raw(s, DMAR_IQT_REG); | |
1913 | ||
1914 | s->iq_tail = VTD_IQT_QT(val); | |
7feb51b7 PX |
1915 | trace_vtd_inv_qi_tail(s->iq_tail); |
1916 | ||
ed7b8fbc LT |
1917 | if (s->qi_enabled && !(vtd_get_long_raw(s, DMAR_FSTS_REG) & VTD_FSTS_IQE)) { |
1918 | /* Process Invalidation Queue here */ | |
1919 | vtd_fetch_inv_desc(s); | |
1920 | } | |
1921 | } | |
1922 | ||
1da12ec4 LT |
1923 | static void vtd_handle_fsts_write(IntelIOMMUState *s) |
1924 | { | |
1925 | uint32_t fsts_reg = vtd_get_long_raw(s, DMAR_FSTS_REG); | |
1926 | uint32_t fectl_reg = vtd_get_long_raw(s, DMAR_FECTL_REG); | |
1927 | uint32_t status_fields = VTD_FSTS_PFO | VTD_FSTS_PPF | VTD_FSTS_IQE; | |
1928 | ||
1929 | if ((fectl_reg & VTD_FECTL_IP) && !(fsts_reg & status_fields)) { | |
1930 | vtd_set_clear_mask_long(s, DMAR_FECTL_REG, VTD_FECTL_IP, 0); | |
7feb51b7 | 1931 | trace_vtd_fsts_clear_ip(); |
1da12ec4 | 1932 | } |
ed7b8fbc LT |
1933 | /* FIXME: when IQE is Clear, should we try to fetch some Invalidation |
1934 | * Descriptors if there are any when Queued Invalidation is enabled? | |
1935 | */ | |
1da12ec4 LT |
1936 | } |
1937 | ||
1938 | static void vtd_handle_fectl_write(IntelIOMMUState *s) | |
1939 | { | |
1940 | uint32_t fectl_reg; | |
1941 | /* FIXME: when software clears the IM field, check the IP field. But do we | |
1942 | * need to compare the old value and the new value to conclude that | |
1943 | * software clears the IM field? Or just check if the IM field is zero? | |
1944 | */ | |
1945 | fectl_reg = vtd_get_long_raw(s, DMAR_FECTL_REG); | |
7feb51b7 PX |
1946 | |
1947 | trace_vtd_reg_write_fectl(fectl_reg); | |
1948 | ||
1da12ec4 LT |
1949 | if ((fectl_reg & VTD_FECTL_IP) && !(fectl_reg & VTD_FECTL_IM)) { |
1950 | vtd_generate_interrupt(s, DMAR_FEADDR_REG, DMAR_FEDATA_REG); | |
1951 | vtd_set_clear_mask_long(s, DMAR_FECTL_REG, VTD_FECTL_IP, 0); | |
1da12ec4 LT |
1952 | } |
1953 | } | |
1954 | ||
ed7b8fbc LT |
1955 | static void vtd_handle_ics_write(IntelIOMMUState *s) |
1956 | { | |
1957 | uint32_t ics_reg = vtd_get_long_raw(s, DMAR_ICS_REG); | |
1958 | uint32_t iectl_reg = vtd_get_long_raw(s, DMAR_IECTL_REG); | |
1959 | ||
1960 | if ((iectl_reg & VTD_IECTL_IP) && !(ics_reg & VTD_ICS_IWC)) { | |
7feb51b7 | 1961 | trace_vtd_reg_ics_clear_ip(); |
ed7b8fbc | 1962 | vtd_set_clear_mask_long(s, DMAR_IECTL_REG, VTD_IECTL_IP, 0); |
ed7b8fbc LT |
1963 | } |
1964 | } | |
1965 | ||
1966 | static void vtd_handle_iectl_write(IntelIOMMUState *s) | |
1967 | { | |
1968 | uint32_t iectl_reg; | |
1969 | /* FIXME: when software clears the IM field, check the IP field. But do we | |
1970 | * need to compare the old value and the new value to conclude that | |
1971 | * software clears the IM field? Or just check if the IM field is zero? | |
1972 | */ | |
1973 | iectl_reg = vtd_get_long_raw(s, DMAR_IECTL_REG); | |
7feb51b7 PX |
1974 | |
1975 | trace_vtd_reg_write_iectl(iectl_reg); | |
1976 | ||
ed7b8fbc LT |
1977 | if ((iectl_reg & VTD_IECTL_IP) && !(iectl_reg & VTD_IECTL_IM)) { |
1978 | vtd_generate_interrupt(s, DMAR_IEADDR_REG, DMAR_IEDATA_REG); | |
1979 | vtd_set_clear_mask_long(s, DMAR_IECTL_REG, VTD_IECTL_IP, 0); | |
ed7b8fbc LT |
1980 | } |
1981 | } | |
1982 | ||
1da12ec4 LT |
1983 | static uint64_t vtd_mem_read(void *opaque, hwaddr addr, unsigned size) |
1984 | { | |
1985 | IntelIOMMUState *s = opaque; | |
1986 | uint64_t val; | |
1987 | ||
7feb51b7 PX |
1988 | trace_vtd_reg_read(addr, size); |
1989 | ||
1da12ec4 | 1990 | if (addr + size > DMAR_REG_SIZE) { |
7feb51b7 | 1991 | trace_vtd_err("Read MMIO over range."); |
1da12ec4 LT |
1992 | return (uint64_t)-1; |
1993 | } | |
1994 | ||
1995 | switch (addr) { | |
1996 | /* Root Table Address Register, 64-bit */ | |
1997 | case DMAR_RTADDR_REG: | |
1998 | if (size == 4) { | |
1999 | val = s->root & ((1ULL << 32) - 1); | |
2000 | } else { | |
2001 | val = s->root; | |
2002 | } | |
2003 | break; | |
2004 | ||
2005 | case DMAR_RTADDR_REG_HI: | |
2006 | assert(size == 4); | |
2007 | val = s->root >> 32; | |
2008 | break; | |
2009 | ||
ed7b8fbc LT |
2010 | /* Invalidation Queue Address Register, 64-bit */ |
2011 | case DMAR_IQA_REG: | |
2012 | val = s->iq | (vtd_get_quad(s, DMAR_IQA_REG) & VTD_IQA_QS); | |
2013 | if (size == 4) { | |
2014 | val = val & ((1ULL << 32) - 1); | |
2015 | } | |
2016 | break; | |
2017 | ||
2018 | case DMAR_IQA_REG_HI: | |
2019 | assert(size == 4); | |
2020 | val = s->iq >> 32; | |
2021 | break; | |
2022 | ||
1da12ec4 LT |
2023 | default: |
2024 | if (size == 4) { | |
2025 | val = vtd_get_long(s, addr); | |
2026 | } else { | |
2027 | val = vtd_get_quad(s, addr); | |
2028 | } | |
2029 | } | |
7feb51b7 | 2030 | |
1da12ec4 LT |
2031 | return val; |
2032 | } | |
2033 | ||
2034 | static void vtd_mem_write(void *opaque, hwaddr addr, | |
2035 | uint64_t val, unsigned size) | |
2036 | { | |
2037 | IntelIOMMUState *s = opaque; | |
2038 | ||
7feb51b7 PX |
2039 | trace_vtd_reg_write(addr, size, val); |
2040 | ||
1da12ec4 | 2041 | if (addr + size > DMAR_REG_SIZE) { |
7feb51b7 | 2042 | trace_vtd_err("Write MMIO over range."); |
1da12ec4 LT |
2043 | return; |
2044 | } | |
2045 | ||
2046 | switch (addr) { | |
2047 | /* Global Command Register, 32-bit */ | |
2048 | case DMAR_GCMD_REG: | |
1da12ec4 LT |
2049 | vtd_set_long(s, addr, val); |
2050 | vtd_handle_gcmd_write(s); | |
2051 | break; | |
2052 | ||
2053 | /* Context Command Register, 64-bit */ | |
2054 | case DMAR_CCMD_REG: | |
1da12ec4 LT |
2055 | if (size == 4) { |
2056 | vtd_set_long(s, addr, val); | |
2057 | } else { | |
2058 | vtd_set_quad(s, addr, val); | |
2059 | vtd_handle_ccmd_write(s); | |
2060 | } | |
2061 | break; | |
2062 | ||
2063 | case DMAR_CCMD_REG_HI: | |
1da12ec4 LT |
2064 | assert(size == 4); |
2065 | vtd_set_long(s, addr, val); | |
2066 | vtd_handle_ccmd_write(s); | |
2067 | break; | |
2068 | ||
2069 | /* IOTLB Invalidation Register, 64-bit */ | |
2070 | case DMAR_IOTLB_REG: | |
1da12ec4 LT |
2071 | if (size == 4) { |
2072 | vtd_set_long(s, addr, val); | |
2073 | } else { | |
2074 | vtd_set_quad(s, addr, val); | |
2075 | vtd_handle_iotlb_write(s); | |
2076 | } | |
2077 | break; | |
2078 | ||
2079 | case DMAR_IOTLB_REG_HI: | |
1da12ec4 LT |
2080 | assert(size == 4); |
2081 | vtd_set_long(s, addr, val); | |
2082 | vtd_handle_iotlb_write(s); | |
2083 | break; | |
2084 | ||
b5a280c0 LT |
2085 | /* Invalidate Address Register, 64-bit */ |
2086 | case DMAR_IVA_REG: | |
b5a280c0 LT |
2087 | if (size == 4) { |
2088 | vtd_set_long(s, addr, val); | |
2089 | } else { | |
2090 | vtd_set_quad(s, addr, val); | |
2091 | } | |
2092 | break; | |
2093 | ||
2094 | case DMAR_IVA_REG_HI: | |
b5a280c0 LT |
2095 | assert(size == 4); |
2096 | vtd_set_long(s, addr, val); | |
2097 | break; | |
2098 | ||
1da12ec4 LT |
2099 | /* Fault Status Register, 32-bit */ |
2100 | case DMAR_FSTS_REG: | |
1da12ec4 LT |
2101 | assert(size == 4); |
2102 | vtd_set_long(s, addr, val); | |
2103 | vtd_handle_fsts_write(s); | |
2104 | break; | |
2105 | ||
2106 | /* Fault Event Control Register, 32-bit */ | |
2107 | case DMAR_FECTL_REG: | |
1da12ec4 LT |
2108 | assert(size == 4); |
2109 | vtd_set_long(s, addr, val); | |
2110 | vtd_handle_fectl_write(s); | |
2111 | break; | |
2112 | ||
2113 | /* Fault Event Data Register, 32-bit */ | |
2114 | case DMAR_FEDATA_REG: | |
1da12ec4 LT |
2115 | assert(size == 4); |
2116 | vtd_set_long(s, addr, val); | |
2117 | break; | |
2118 | ||
2119 | /* Fault Event Address Register, 32-bit */ | |
2120 | case DMAR_FEADDR_REG: | |
1da12ec4 LT |
2121 | assert(size == 4); |
2122 | vtd_set_long(s, addr, val); | |
2123 | break; | |
2124 | ||
2125 | /* Fault Event Upper Address Register, 32-bit */ | |
2126 | case DMAR_FEUADDR_REG: | |
1da12ec4 LT |
2127 | assert(size == 4); |
2128 | vtd_set_long(s, addr, val); | |
2129 | break; | |
2130 | ||
2131 | /* Protected Memory Enable Register, 32-bit */ | |
2132 | case DMAR_PMEN_REG: | |
1da12ec4 LT |
2133 | assert(size == 4); |
2134 | vtd_set_long(s, addr, val); | |
2135 | break; | |
2136 | ||
2137 | /* Root Table Address Register, 64-bit */ | |
2138 | case DMAR_RTADDR_REG: | |
1da12ec4 LT |
2139 | if (size == 4) { |
2140 | vtd_set_long(s, addr, val); | |
2141 | } else { | |
2142 | vtd_set_quad(s, addr, val); | |
2143 | } | |
2144 | break; | |
2145 | ||
2146 | case DMAR_RTADDR_REG_HI: | |
1da12ec4 LT |
2147 | assert(size == 4); |
2148 | vtd_set_long(s, addr, val); | |
2149 | break; | |
2150 | ||
ed7b8fbc LT |
2151 | /* Invalidation Queue Tail Register, 64-bit */ |
2152 | case DMAR_IQT_REG: | |
ed7b8fbc LT |
2153 | if (size == 4) { |
2154 | vtd_set_long(s, addr, val); | |
2155 | } else { | |
2156 | vtd_set_quad(s, addr, val); | |
2157 | } | |
2158 | vtd_handle_iqt_write(s); | |
2159 | break; | |
2160 | ||
2161 | case DMAR_IQT_REG_HI: | |
ed7b8fbc LT |
2162 | assert(size == 4); |
2163 | vtd_set_long(s, addr, val); | |
2164 | /* 19:63 of IQT_REG is RsvdZ, do nothing here */ | |
2165 | break; | |
2166 | ||
2167 | /* Invalidation Queue Address Register, 64-bit */ | |
2168 | case DMAR_IQA_REG: | |
ed7b8fbc LT |
2169 | if (size == 4) { |
2170 | vtd_set_long(s, addr, val); | |
2171 | } else { | |
2172 | vtd_set_quad(s, addr, val); | |
2173 | } | |
2174 | break; | |
2175 | ||
2176 | case DMAR_IQA_REG_HI: | |
ed7b8fbc LT |
2177 | assert(size == 4); |
2178 | vtd_set_long(s, addr, val); | |
2179 | break; | |
2180 | ||
2181 | /* Invalidation Completion Status Register, 32-bit */ | |
2182 | case DMAR_ICS_REG: | |
ed7b8fbc LT |
2183 | assert(size == 4); |
2184 | vtd_set_long(s, addr, val); | |
2185 | vtd_handle_ics_write(s); | |
2186 | break; | |
2187 | ||
2188 | /* Invalidation Event Control Register, 32-bit */ | |
2189 | case DMAR_IECTL_REG: | |
ed7b8fbc LT |
2190 | assert(size == 4); |
2191 | vtd_set_long(s, addr, val); | |
2192 | vtd_handle_iectl_write(s); | |
2193 | break; | |
2194 | ||
2195 | /* Invalidation Event Data Register, 32-bit */ | |
2196 | case DMAR_IEDATA_REG: | |
ed7b8fbc LT |
2197 | assert(size == 4); |
2198 | vtd_set_long(s, addr, val); | |
2199 | break; | |
2200 | ||
2201 | /* Invalidation Event Address Register, 32-bit */ | |
2202 | case DMAR_IEADDR_REG: | |
ed7b8fbc LT |
2203 | assert(size == 4); |
2204 | vtd_set_long(s, addr, val); | |
2205 | break; | |
2206 | ||
2207 | /* Invalidation Event Upper Address Register, 32-bit */ | |
2208 | case DMAR_IEUADDR_REG: | |
ed7b8fbc LT |
2209 | assert(size == 4); |
2210 | vtd_set_long(s, addr, val); | |
2211 | break; | |
2212 | ||
1da12ec4 LT |
2213 | /* Fault Recording Registers, 128-bit */ |
2214 | case DMAR_FRCD_REG_0_0: | |
1da12ec4 LT |
2215 | if (size == 4) { |
2216 | vtd_set_long(s, addr, val); | |
2217 | } else { | |
2218 | vtd_set_quad(s, addr, val); | |
2219 | } | |
2220 | break; | |
2221 | ||
2222 | case DMAR_FRCD_REG_0_1: | |
1da12ec4 LT |
2223 | assert(size == 4); |
2224 | vtd_set_long(s, addr, val); | |
2225 | break; | |
2226 | ||
2227 | case DMAR_FRCD_REG_0_2: | |
1da12ec4 LT |
2228 | if (size == 4) { |
2229 | vtd_set_long(s, addr, val); | |
2230 | } else { | |
2231 | vtd_set_quad(s, addr, val); | |
2232 | /* May clear bit 127 (Fault), update PPF */ | |
2233 | vtd_update_fsts_ppf(s); | |
2234 | } | |
2235 | break; | |
2236 | ||
2237 | case DMAR_FRCD_REG_0_3: | |
1da12ec4 LT |
2238 | assert(size == 4); |
2239 | vtd_set_long(s, addr, val); | |
2240 | /* May clear bit 127 (Fault), update PPF */ | |
2241 | vtd_update_fsts_ppf(s); | |
2242 | break; | |
2243 | ||
a5861439 | 2244 | case DMAR_IRTA_REG: |
a5861439 PX |
2245 | if (size == 4) { |
2246 | vtd_set_long(s, addr, val); | |
2247 | } else { | |
2248 | vtd_set_quad(s, addr, val); | |
2249 | } | |
2250 | break; | |
2251 | ||
2252 | case DMAR_IRTA_REG_HI: | |
a5861439 PX |
2253 | assert(size == 4); |
2254 | vtd_set_long(s, addr, val); | |
2255 | break; | |
2256 | ||
1da12ec4 | 2257 | default: |
1da12ec4 LT |
2258 | if (size == 4) { |
2259 | vtd_set_long(s, addr, val); | |
2260 | } else { | |
2261 | vtd_set_quad(s, addr, val); | |
2262 | } | |
2263 | } | |
2264 | } | |
2265 | ||
3df9d748 | 2266 | static IOMMUTLBEntry vtd_iommu_translate(IOMMUMemoryRegion *iommu, hwaddr addr, |
bf55b7af | 2267 | IOMMUAccessFlags flag) |
1da12ec4 LT |
2268 | { |
2269 | VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu); | |
2270 | IntelIOMMUState *s = vtd_as->iommu_state; | |
b9313021 PX |
2271 | IOMMUTLBEntry iotlb = { |
2272 | /* We'll fill in the rest later. */ | |
1da12ec4 | 2273 | .target_as = &address_space_memory, |
1da12ec4 | 2274 | }; |
b9313021 | 2275 | bool success; |
1da12ec4 | 2276 | |
b9313021 PX |
2277 | if (likely(s->dmar_enabled)) { |
2278 | success = vtd_do_iommu_translate(vtd_as, vtd_as->bus, vtd_as->devfn, | |
2279 | addr, flag & IOMMU_WO, &iotlb); | |
2280 | } else { | |
1da12ec4 | 2281 | /* DMAR disabled, passthrough, use 4k-page*/ |
b9313021 PX |
2282 | iotlb.iova = addr & VTD_PAGE_MASK_4K; |
2283 | iotlb.translated_addr = addr & VTD_PAGE_MASK_4K; | |
2284 | iotlb.addr_mask = ~VTD_PAGE_MASK_4K; | |
2285 | iotlb.perm = IOMMU_RW; | |
2286 | success = true; | |
1da12ec4 LT |
2287 | } |
2288 | ||
b9313021 PX |
2289 | if (likely(success)) { |
2290 | trace_vtd_dmar_translate(pci_bus_num(vtd_as->bus), | |
2291 | VTD_PCI_SLOT(vtd_as->devfn), | |
2292 | VTD_PCI_FUNC(vtd_as->devfn), | |
2293 | iotlb.iova, iotlb.translated_addr, | |
2294 | iotlb.addr_mask); | |
2295 | } else { | |
2296 | trace_vtd_err_dmar_translate(pci_bus_num(vtd_as->bus), | |
2297 | VTD_PCI_SLOT(vtd_as->devfn), | |
2298 | VTD_PCI_FUNC(vtd_as->devfn), | |
2299 | iotlb.iova); | |
2300 | } | |
7feb51b7 | 2301 | |
b9313021 | 2302 | return iotlb; |
1da12ec4 LT |
2303 | } |
2304 | ||
3df9d748 | 2305 | static void vtd_iommu_notify_flag_changed(IOMMUMemoryRegion *iommu, |
5bf3d319 PX |
2306 | IOMMUNotifierFlag old, |
2307 | IOMMUNotifierFlag new) | |
3cb3b154 AW |
2308 | { |
2309 | VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu); | |
dd4d607e PX |
2310 | IntelIOMMUState *s = vtd_as->iommu_state; |
2311 | IntelIOMMUNotifierNode *node = NULL; | |
2312 | IntelIOMMUNotifierNode *next_node = NULL; | |
3cb3b154 | 2313 | |
dd4d607e PX |
2314 | if (!s->caching_mode && new & IOMMU_NOTIFIER_MAP) { |
2315 | error_report("We need to set cache_mode=1 for intel-iommu to enable " | |
2316 | "device assignment with IOMMU protection."); | |
a3276f78 PX |
2317 | exit(1); |
2318 | } | |
dd4d607e PX |
2319 | |
2320 | if (old == IOMMU_NOTIFIER_NONE) { | |
2321 | node = g_malloc0(sizeof(*node)); | |
2322 | node->vtd_as = vtd_as; | |
2323 | QLIST_INSERT_HEAD(&s->notifiers_list, node, next); | |
2324 | return; | |
2325 | } | |
2326 | ||
2327 | /* update notifier node with new flags */ | |
2328 | QLIST_FOREACH_SAFE(node, &s->notifiers_list, next, next_node) { | |
2329 | if (node->vtd_as == vtd_as) { | |
2330 | if (new == IOMMU_NOTIFIER_NONE) { | |
2331 | QLIST_REMOVE(node, next); | |
2332 | g_free(node); | |
2333 | } | |
2334 | return; | |
2335 | } | |
2336 | } | |
3cb3b154 AW |
2337 | } |
2338 | ||
552a1e01 PX |
2339 | static int vtd_post_load(void *opaque, int version_id) |
2340 | { | |
2341 | IntelIOMMUState *iommu = opaque; | |
2342 | ||
2343 | /* | |
2344 | * Memory regions are dynamically turned on/off depending on | |
2345 | * context entry configurations from the guest. After migration, | |
2346 | * we need to make sure the memory regions are still correct. | |
2347 | */ | |
2348 | vtd_switch_address_space_all(iommu); | |
2349 | ||
2350 | return 0; | |
2351 | } | |
2352 | ||
1da12ec4 LT |
2353 | static const VMStateDescription vtd_vmstate = { |
2354 | .name = "iommu-intel", | |
8cdcf3c1 PX |
2355 | .version_id = 1, |
2356 | .minimum_version_id = 1, | |
2357 | .priority = MIG_PRI_IOMMU, | |
552a1e01 | 2358 | .post_load = vtd_post_load, |
8cdcf3c1 PX |
2359 | .fields = (VMStateField[]) { |
2360 | VMSTATE_UINT64(root, IntelIOMMUState), | |
2361 | VMSTATE_UINT64(intr_root, IntelIOMMUState), | |
2362 | VMSTATE_UINT64(iq, IntelIOMMUState), | |
2363 | VMSTATE_UINT32(intr_size, IntelIOMMUState), | |
2364 | VMSTATE_UINT16(iq_head, IntelIOMMUState), | |
2365 | VMSTATE_UINT16(iq_tail, IntelIOMMUState), | |
2366 | VMSTATE_UINT16(iq_size, IntelIOMMUState), | |
2367 | VMSTATE_UINT16(next_frcd_reg, IntelIOMMUState), | |
2368 | VMSTATE_UINT8_ARRAY(csr, IntelIOMMUState, DMAR_REG_SIZE), | |
2369 | VMSTATE_UINT8(iq_last_desc_type, IntelIOMMUState), | |
2370 | VMSTATE_BOOL(root_extended, IntelIOMMUState), | |
2371 | VMSTATE_BOOL(dmar_enabled, IntelIOMMUState), | |
2372 | VMSTATE_BOOL(qi_enabled, IntelIOMMUState), | |
2373 | VMSTATE_BOOL(intr_enabled, IntelIOMMUState), | |
2374 | VMSTATE_BOOL(intr_eime, IntelIOMMUState), | |
2375 | VMSTATE_END_OF_LIST() | |
2376 | } | |
1da12ec4 LT |
2377 | }; |
2378 | ||
2379 | static const MemoryRegionOps vtd_mem_ops = { | |
2380 | .read = vtd_mem_read, | |
2381 | .write = vtd_mem_write, | |
2382 | .endianness = DEVICE_LITTLE_ENDIAN, | |
2383 | .impl = { | |
2384 | .min_access_size = 4, | |
2385 | .max_access_size = 8, | |
2386 | }, | |
2387 | .valid = { | |
2388 | .min_access_size = 4, | |
2389 | .max_access_size = 8, | |
2390 | }, | |
2391 | }; | |
2392 | ||
2393 | static Property vtd_properties[] = { | |
2394 | DEFINE_PROP_UINT32("version", IntelIOMMUState, version, 0), | |
e6b6af05 RK |
2395 | DEFINE_PROP_ON_OFF_AUTO("eim", IntelIOMMUState, intr_eim, |
2396 | ON_OFF_AUTO_AUTO), | |
fb506e70 | 2397 | DEFINE_PROP_BOOL("x-buggy-eim", IntelIOMMUState, buggy_eim, false), |
3b40f0e5 | 2398 | DEFINE_PROP_BOOL("caching-mode", IntelIOMMUState, caching_mode, FALSE), |
1da12ec4 LT |
2399 | DEFINE_PROP_END_OF_LIST(), |
2400 | }; | |
2401 | ||
651e4cef PX |
2402 | /* Read IRTE entry with specific index */ |
2403 | static int vtd_irte_get(IntelIOMMUState *iommu, uint16_t index, | |
bc38ee10 | 2404 | VTD_IR_TableEntry *entry, uint16_t sid) |
651e4cef | 2405 | { |
ede9c94a PX |
2406 | static const uint16_t vtd_svt_mask[VTD_SQ_MAX] = \ |
2407 | {0xffff, 0xfffb, 0xfff9, 0xfff8}; | |
651e4cef | 2408 | dma_addr_t addr = 0x00; |
ede9c94a PX |
2409 | uint16_t mask, source_id; |
2410 | uint8_t bus, bus_max, bus_min; | |
651e4cef PX |
2411 | |
2412 | addr = iommu->intr_root + index * sizeof(*entry); | |
2413 | if (dma_memory_read(&address_space_memory, addr, entry, | |
2414 | sizeof(*entry))) { | |
7feb51b7 | 2415 | trace_vtd_err("Memory read failed for IRTE."); |
651e4cef PX |
2416 | return -VTD_FR_IR_ROOT_INVAL; |
2417 | } | |
2418 | ||
7feb51b7 PX |
2419 | trace_vtd_ir_irte_get(index, le64_to_cpu(entry->data[1]), |
2420 | le64_to_cpu(entry->data[0])); | |
2421 | ||
bc38ee10 | 2422 | if (!entry->irte.present) { |
7feb51b7 PX |
2423 | trace_vtd_err_irte(index, le64_to_cpu(entry->data[1]), |
2424 | le64_to_cpu(entry->data[0])); | |
651e4cef PX |
2425 | return -VTD_FR_IR_ENTRY_P; |
2426 | } | |
2427 | ||
bc38ee10 MT |
2428 | if (entry->irte.__reserved_0 || entry->irte.__reserved_1 || |
2429 | entry->irte.__reserved_2) { | |
7feb51b7 PX |
2430 | trace_vtd_err_irte(index, le64_to_cpu(entry->data[1]), |
2431 | le64_to_cpu(entry->data[0])); | |
651e4cef PX |
2432 | return -VTD_FR_IR_IRTE_RSVD; |
2433 | } | |
2434 | ||
ede9c94a PX |
2435 | if (sid != X86_IOMMU_SID_INVALID) { |
2436 | /* Validate IRTE SID */ | |
bc38ee10 MT |
2437 | source_id = le32_to_cpu(entry->irte.source_id); |
2438 | switch (entry->irte.sid_vtype) { | |
ede9c94a | 2439 | case VTD_SVT_NONE: |
ede9c94a PX |
2440 | break; |
2441 | ||
2442 | case VTD_SVT_ALL: | |
bc38ee10 | 2443 | mask = vtd_svt_mask[entry->irte.sid_q]; |
ede9c94a | 2444 | if ((source_id & mask) != (sid & mask)) { |
7feb51b7 | 2445 | trace_vtd_err_irte_sid(index, sid, source_id); |
ede9c94a PX |
2446 | return -VTD_FR_IR_SID_ERR; |
2447 | } | |
2448 | break; | |
2449 | ||
2450 | case VTD_SVT_BUS: | |
2451 | bus_max = source_id >> 8; | |
2452 | bus_min = source_id & 0xff; | |
2453 | bus = sid >> 8; | |
2454 | if (bus > bus_max || bus < bus_min) { | |
7feb51b7 | 2455 | trace_vtd_err_irte_sid_bus(index, bus, bus_min, bus_max); |
ede9c94a PX |
2456 | return -VTD_FR_IR_SID_ERR; |
2457 | } | |
2458 | break; | |
2459 | ||
2460 | default: | |
7feb51b7 | 2461 | trace_vtd_err_irte_svt(index, entry->irte.sid_vtype); |
ede9c94a PX |
2462 | /* Take this as verification failure. */ |
2463 | return -VTD_FR_IR_SID_ERR; | |
2464 | break; | |
2465 | } | |
2466 | } | |
651e4cef PX |
2467 | |
2468 | return 0; | |
2469 | } | |
2470 | ||
2471 | /* Fetch IRQ information of specific IR index */ | |
ede9c94a PX |
2472 | static int vtd_remap_irq_get(IntelIOMMUState *iommu, uint16_t index, |
2473 | VTDIrq *irq, uint16_t sid) | |
651e4cef | 2474 | { |
bc38ee10 | 2475 | VTD_IR_TableEntry irte = {}; |
651e4cef PX |
2476 | int ret = 0; |
2477 | ||
ede9c94a | 2478 | ret = vtd_irte_get(iommu, index, &irte, sid); |
651e4cef PX |
2479 | if (ret) { |
2480 | return ret; | |
2481 | } | |
2482 | ||
bc38ee10 MT |
2483 | irq->trigger_mode = irte.irte.trigger_mode; |
2484 | irq->vector = irte.irte.vector; | |
2485 | irq->delivery_mode = irte.irte.delivery_mode; | |
2486 | irq->dest = le32_to_cpu(irte.irte.dest_id); | |
28589311 | 2487 | if (!iommu->intr_eime) { |
651e4cef PX |
2488 | #define VTD_IR_APIC_DEST_MASK (0xff00ULL) |
2489 | #define VTD_IR_APIC_DEST_SHIFT (8) | |
28589311 JK |
2490 | irq->dest = (irq->dest & VTD_IR_APIC_DEST_MASK) >> |
2491 | VTD_IR_APIC_DEST_SHIFT; | |
2492 | } | |
bc38ee10 MT |
2493 | irq->dest_mode = irte.irte.dest_mode; |
2494 | irq->redir_hint = irte.irte.redir_hint; | |
651e4cef | 2495 | |
7feb51b7 PX |
2496 | trace_vtd_ir_remap(index, irq->trigger_mode, irq->vector, |
2497 | irq->delivery_mode, irq->dest, irq->dest_mode); | |
651e4cef PX |
2498 | |
2499 | return 0; | |
2500 | } | |
2501 | ||
2502 | /* Generate one MSI message from VTDIrq info */ | |
2503 | static void vtd_generate_msi_message(VTDIrq *irq, MSIMessage *msg_out) | |
2504 | { | |
2505 | VTD_MSIMessage msg = {}; | |
2506 | ||
2507 | /* Generate address bits */ | |
2508 | msg.dest_mode = irq->dest_mode; | |
2509 | msg.redir_hint = irq->redir_hint; | |
2510 | msg.dest = irq->dest; | |
32946019 | 2511 | msg.__addr_hi = irq->dest & 0xffffff00; |
651e4cef PX |
2512 | msg.__addr_head = cpu_to_le32(0xfee); |
2513 | /* Keep this from original MSI address bits */ | |
2514 | msg.__not_used = irq->msi_addr_last_bits; | |
2515 | ||
2516 | /* Generate data bits */ | |
2517 | msg.vector = irq->vector; | |
2518 | msg.delivery_mode = irq->delivery_mode; | |
2519 | msg.level = 1; | |
2520 | msg.trigger_mode = irq->trigger_mode; | |
2521 | ||
2522 | msg_out->address = msg.msi_addr; | |
2523 | msg_out->data = msg.msi_data; | |
2524 | } | |
2525 | ||
2526 | /* Interrupt remapping for MSI/MSI-X entry */ | |
2527 | static int vtd_interrupt_remap_msi(IntelIOMMUState *iommu, | |
2528 | MSIMessage *origin, | |
ede9c94a PX |
2529 | MSIMessage *translated, |
2530 | uint16_t sid) | |
651e4cef PX |
2531 | { |
2532 | int ret = 0; | |
2533 | VTD_IR_MSIAddress addr; | |
2534 | uint16_t index; | |
09cd058a | 2535 | VTDIrq irq = {}; |
651e4cef PX |
2536 | |
2537 | assert(origin && translated); | |
2538 | ||
7feb51b7 PX |
2539 | trace_vtd_ir_remap_msi_req(origin->address, origin->data); |
2540 | ||
651e4cef | 2541 | if (!iommu || !iommu->intr_enabled) { |
e7a3b91f PX |
2542 | memcpy(translated, origin, sizeof(*origin)); |
2543 | goto out; | |
651e4cef PX |
2544 | } |
2545 | ||
2546 | if (origin->address & VTD_MSI_ADDR_HI_MASK) { | |
7feb51b7 PX |
2547 | trace_vtd_err("MSI address high 32 bits non-zero when " |
2548 | "Interrupt Remapping enabled."); | |
651e4cef PX |
2549 | return -VTD_FR_IR_REQ_RSVD; |
2550 | } | |
2551 | ||
2552 | addr.data = origin->address & VTD_MSI_ADDR_LO_MASK; | |
1a43713b | 2553 | if (addr.addr.__head != 0xfee) { |
7feb51b7 | 2554 | trace_vtd_err("MSI addr low 32 bit invalid."); |
651e4cef PX |
2555 | return -VTD_FR_IR_REQ_RSVD; |
2556 | } | |
2557 | ||
2558 | /* This is compatible mode. */ | |
bc38ee10 | 2559 | if (addr.addr.int_mode != VTD_IR_INT_FORMAT_REMAP) { |
e7a3b91f PX |
2560 | memcpy(translated, origin, sizeof(*origin)); |
2561 | goto out; | |
651e4cef PX |
2562 | } |
2563 | ||
bc38ee10 | 2564 | index = addr.addr.index_h << 15 | le16_to_cpu(addr.addr.index_l); |
651e4cef PX |
2565 | |
2566 | #define VTD_IR_MSI_DATA_SUBHANDLE (0x0000ffff) | |
2567 | #define VTD_IR_MSI_DATA_RESERVED (0xffff0000) | |
2568 | ||
bc38ee10 | 2569 | if (addr.addr.sub_valid) { |
651e4cef PX |
2570 | /* See VT-d spec 5.1.2.2 and 5.1.3 on subhandle */ |
2571 | index += origin->data & VTD_IR_MSI_DATA_SUBHANDLE; | |
2572 | } | |
2573 | ||
ede9c94a | 2574 | ret = vtd_remap_irq_get(iommu, index, &irq, sid); |
651e4cef PX |
2575 | if (ret) { |
2576 | return ret; | |
2577 | } | |
2578 | ||
bc38ee10 | 2579 | if (addr.addr.sub_valid) { |
7feb51b7 | 2580 | trace_vtd_ir_remap_type("MSI"); |
651e4cef | 2581 | if (origin->data & VTD_IR_MSI_DATA_RESERVED) { |
7feb51b7 | 2582 | trace_vtd_err_ir_msi_invalid(sid, origin->address, origin->data); |
651e4cef PX |
2583 | return -VTD_FR_IR_REQ_RSVD; |
2584 | } | |
2585 | } else { | |
2586 | uint8_t vector = origin->data & 0xff; | |
dea651a9 FW |
2587 | uint8_t trigger_mode = (origin->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1; |
2588 | ||
7feb51b7 | 2589 | trace_vtd_ir_remap_type("IOAPIC"); |
651e4cef PX |
2590 | /* IOAPIC entry vector should be aligned with IRTE vector |
2591 | * (see vt-d spec 5.1.5.1). */ | |
2592 | if (vector != irq.vector) { | |
7feb51b7 | 2593 | trace_vtd_warn_ir_vector(sid, index, vector, irq.vector); |
651e4cef | 2594 | } |
dea651a9 FW |
2595 | |
2596 | /* The Trigger Mode field must match the Trigger Mode in the IRTE. | |
2597 | * (see vt-d spec 5.1.5.1). */ | |
2598 | if (trigger_mode != irq.trigger_mode) { | |
7feb51b7 PX |
2599 | trace_vtd_warn_ir_trigger(sid, index, trigger_mode, |
2600 | irq.trigger_mode); | |
dea651a9 | 2601 | } |
651e4cef PX |
2602 | } |
2603 | ||
2604 | /* | |
2605 | * We'd better keep the last two bits, assuming that guest OS | |
2606 | * might modify it. Keep it does not hurt after all. | |
2607 | */ | |
bc38ee10 | 2608 | irq.msi_addr_last_bits = addr.addr.__not_care; |
651e4cef PX |
2609 | |
2610 | /* Translate VTDIrq to MSI message */ | |
2611 | vtd_generate_msi_message(&irq, translated); | |
2612 | ||
e7a3b91f | 2613 | out: |
7feb51b7 PX |
2614 | trace_vtd_ir_remap_msi(origin->address, origin->data, |
2615 | translated->address, translated->data); | |
651e4cef PX |
2616 | return 0; |
2617 | } | |
2618 | ||
8b5ed7df PX |
2619 | static int vtd_int_remap(X86IOMMUState *iommu, MSIMessage *src, |
2620 | MSIMessage *dst, uint16_t sid) | |
2621 | { | |
ede9c94a PX |
2622 | return vtd_interrupt_remap_msi(INTEL_IOMMU_DEVICE(iommu), |
2623 | src, dst, sid); | |
8b5ed7df PX |
2624 | } |
2625 | ||
651e4cef PX |
2626 | static MemTxResult vtd_mem_ir_read(void *opaque, hwaddr addr, |
2627 | uint64_t *data, unsigned size, | |
2628 | MemTxAttrs attrs) | |
2629 | { | |
2630 | return MEMTX_OK; | |
2631 | } | |
2632 | ||
2633 | static MemTxResult vtd_mem_ir_write(void *opaque, hwaddr addr, | |
2634 | uint64_t value, unsigned size, | |
2635 | MemTxAttrs attrs) | |
2636 | { | |
2637 | int ret = 0; | |
09cd058a | 2638 | MSIMessage from = {}, to = {}; |
ede9c94a | 2639 | uint16_t sid = X86_IOMMU_SID_INVALID; |
651e4cef PX |
2640 | |
2641 | from.address = (uint64_t) addr + VTD_INTERRUPT_ADDR_FIRST; | |
2642 | from.data = (uint32_t) value; | |
2643 | ||
ede9c94a PX |
2644 | if (!attrs.unspecified) { |
2645 | /* We have explicit Source ID */ | |
2646 | sid = attrs.requester_id; | |
2647 | } | |
2648 | ||
2649 | ret = vtd_interrupt_remap_msi(opaque, &from, &to, sid); | |
651e4cef PX |
2650 | if (ret) { |
2651 | /* TODO: report error */ | |
651e4cef PX |
2652 | /* Drop this interrupt */ |
2653 | return MEMTX_ERROR; | |
2654 | } | |
2655 | ||
32946019 | 2656 | apic_get_class()->send_msi(&to); |
651e4cef PX |
2657 | |
2658 | return MEMTX_OK; | |
2659 | } | |
2660 | ||
2661 | static const MemoryRegionOps vtd_mem_ir_ops = { | |
2662 | .read_with_attrs = vtd_mem_ir_read, | |
2663 | .write_with_attrs = vtd_mem_ir_write, | |
2664 | .endianness = DEVICE_LITTLE_ENDIAN, | |
2665 | .impl = { | |
2666 | .min_access_size = 4, | |
2667 | .max_access_size = 4, | |
2668 | }, | |
2669 | .valid = { | |
2670 | .min_access_size = 4, | |
2671 | .max_access_size = 4, | |
2672 | }, | |
2673 | }; | |
7df953bd KO |
2674 | |
2675 | VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn) | |
2676 | { | |
2677 | uintptr_t key = (uintptr_t)bus; | |
2678 | VTDBus *vtd_bus = g_hash_table_lookup(s->vtd_as_by_busptr, &key); | |
2679 | VTDAddressSpace *vtd_dev_as; | |
e0a3c8cc | 2680 | char name[128]; |
7df953bd KO |
2681 | |
2682 | if (!vtd_bus) { | |
2d3fc581 JW |
2683 | uintptr_t *new_key = g_malloc(sizeof(*new_key)); |
2684 | *new_key = (uintptr_t)bus; | |
7df953bd | 2685 | /* No corresponding free() */ |
04af0e18 PX |
2686 | vtd_bus = g_malloc0(sizeof(VTDBus) + sizeof(VTDAddressSpace *) * \ |
2687 | X86_IOMMU_PCI_DEVFN_MAX); | |
7df953bd | 2688 | vtd_bus->bus = bus; |
2d3fc581 | 2689 | g_hash_table_insert(s->vtd_as_by_busptr, new_key, vtd_bus); |
7df953bd KO |
2690 | } |
2691 | ||
2692 | vtd_dev_as = vtd_bus->dev_as[devfn]; | |
2693 | ||
2694 | if (!vtd_dev_as) { | |
e0a3c8cc | 2695 | snprintf(name, sizeof(name), "intel_iommu_devfn_%d", devfn); |
7df953bd KO |
2696 | vtd_bus->dev_as[devfn] = vtd_dev_as = g_malloc0(sizeof(VTDAddressSpace)); |
2697 | ||
2698 | vtd_dev_as->bus = bus; | |
2699 | vtd_dev_as->devfn = (uint8_t)devfn; | |
2700 | vtd_dev_as->iommu_state = s; | |
2701 | vtd_dev_as->context_cache_entry.context_cache_gen = 0; | |
558e0024 PX |
2702 | |
2703 | /* | |
2704 | * Memory region relationships looks like (Address range shows | |
2705 | * only lower 32 bits to make it short in length...): | |
2706 | * | |
2707 | * |-----------------+-------------------+----------| | |
2708 | * | Name | Address range | Priority | | |
2709 | * |-----------------+-------------------+----------+ | |
2710 | * | vtd_root | 00000000-ffffffff | 0 | | |
2711 | * | intel_iommu | 00000000-ffffffff | 1 | | |
2712 | * | vtd_sys_alias | 00000000-ffffffff | 1 | | |
2713 | * | intel_iommu_ir | fee00000-feefffff | 64 | | |
2714 | * |-----------------+-------------------+----------| | |
2715 | * | |
2716 | * We enable/disable DMAR by switching enablement for | |
2717 | * vtd_sys_alias and intel_iommu regions. IR region is always | |
2718 | * enabled. | |
2719 | */ | |
1221a474 AK |
2720 | memory_region_init_iommu(&vtd_dev_as->iommu, sizeof(vtd_dev_as->iommu), |
2721 | TYPE_INTEL_IOMMU_MEMORY_REGION, OBJECT(s), | |
2722 | "intel_iommu_dmar", | |
558e0024 PX |
2723 | UINT64_MAX); |
2724 | memory_region_init_alias(&vtd_dev_as->sys_alias, OBJECT(s), | |
2725 | "vtd_sys_alias", get_system_memory(), | |
2726 | 0, memory_region_size(get_system_memory())); | |
651e4cef PX |
2727 | memory_region_init_io(&vtd_dev_as->iommu_ir, OBJECT(s), |
2728 | &vtd_mem_ir_ops, s, "intel_iommu_ir", | |
2729 | VTD_INTERRUPT_ADDR_SIZE); | |
558e0024 PX |
2730 | memory_region_init(&vtd_dev_as->root, OBJECT(s), |
2731 | "vtd_root", UINT64_MAX); | |
2732 | memory_region_add_subregion_overlap(&vtd_dev_as->root, | |
2733 | VTD_INTERRUPT_ADDR_FIRST, | |
2734 | &vtd_dev_as->iommu_ir, 64); | |
2735 | address_space_init(&vtd_dev_as->as, &vtd_dev_as->root, name); | |
2736 | memory_region_add_subregion_overlap(&vtd_dev_as->root, 0, | |
2737 | &vtd_dev_as->sys_alias, 1); | |
2738 | memory_region_add_subregion_overlap(&vtd_dev_as->root, 0, | |
3df9d748 AK |
2739 | MEMORY_REGION(&vtd_dev_as->iommu), |
2740 | 1); | |
558e0024 | 2741 | vtd_switch_address_space(vtd_dev_as); |
7df953bd KO |
2742 | } |
2743 | return vtd_dev_as; | |
2744 | } | |
2745 | ||
dd4d607e PX |
2746 | /* Unmap the whole range in the notifier's scope. */ |
2747 | static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n) | |
2748 | { | |
2749 | IOMMUTLBEntry entry; | |
2750 | hwaddr size; | |
2751 | hwaddr start = n->start; | |
2752 | hwaddr end = n->end; | |
2753 | ||
2754 | /* | |
2755 | * Note: all the codes in this function has a assumption that IOVA | |
2756 | * bits are no more than VTD_MGAW bits (which is restricted by | |
2757 | * VT-d spec), otherwise we need to consider overflow of 64 bits. | |
2758 | */ | |
2759 | ||
2760 | if (end > VTD_ADDRESS_SIZE) { | |
2761 | /* | |
2762 | * Don't need to unmap regions that is bigger than the whole | |
2763 | * VT-d supported address space size | |
2764 | */ | |
2765 | end = VTD_ADDRESS_SIZE; | |
2766 | } | |
2767 | ||
2768 | assert(start <= end); | |
2769 | size = end - start; | |
2770 | ||
2771 | if (ctpop64(size) != 1) { | |
2772 | /* | |
2773 | * This size cannot format a correct mask. Let's enlarge it to | |
2774 | * suite the minimum available mask. | |
2775 | */ | |
2776 | int n = 64 - clz64(size); | |
2777 | if (n > VTD_MGAW) { | |
2778 | /* should not happen, but in case it happens, limit it */ | |
2779 | n = VTD_MGAW; | |
2780 | } | |
2781 | size = 1ULL << n; | |
2782 | } | |
2783 | ||
2784 | entry.target_as = &address_space_memory; | |
2785 | /* Adjust iova for the size */ | |
2786 | entry.iova = n->start & ~(size - 1); | |
2787 | /* This field is meaningless for unmap */ | |
2788 | entry.translated_addr = 0; | |
2789 | entry.perm = IOMMU_NONE; | |
2790 | entry.addr_mask = size - 1; | |
2791 | ||
2792 | trace_vtd_as_unmap_whole(pci_bus_num(as->bus), | |
2793 | VTD_PCI_SLOT(as->devfn), | |
2794 | VTD_PCI_FUNC(as->devfn), | |
2795 | entry.iova, size); | |
2796 | ||
2797 | memory_region_notify_one(n, &entry); | |
2798 | } | |
2799 | ||
2800 | static void vtd_address_space_unmap_all(IntelIOMMUState *s) | |
2801 | { | |
2802 | IntelIOMMUNotifierNode *node; | |
2803 | VTDAddressSpace *vtd_as; | |
2804 | IOMMUNotifier *n; | |
2805 | ||
2806 | QLIST_FOREACH(node, &s->notifiers_list, next) { | |
2807 | vtd_as = node->vtd_as; | |
2808 | IOMMU_NOTIFIER_FOREACH(n, &vtd_as->iommu) { | |
2809 | vtd_address_space_unmap(vtd_as, n); | |
2810 | } | |
2811 | } | |
2812 | } | |
2813 | ||
f06a696d PX |
2814 | static int vtd_replay_hook(IOMMUTLBEntry *entry, void *private) |
2815 | { | |
2816 | memory_region_notify_one((IOMMUNotifier *)private, entry); | |
2817 | return 0; | |
2818 | } | |
2819 | ||
3df9d748 | 2820 | static void vtd_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n) |
f06a696d | 2821 | { |
3df9d748 | 2822 | VTDAddressSpace *vtd_as = container_of(iommu_mr, VTDAddressSpace, iommu); |
f06a696d PX |
2823 | IntelIOMMUState *s = vtd_as->iommu_state; |
2824 | uint8_t bus_n = pci_bus_num(vtd_as->bus); | |
2825 | VTDContextEntry ce; | |
2826 | ||
dd4d607e PX |
2827 | /* |
2828 | * The replay can be triggered by either a invalidation or a newly | |
2829 | * created entry. No matter what, we release existing mappings | |
2830 | * (it means flushing caches for UNMAP-only registers). | |
2831 | */ | |
2832 | vtd_address_space_unmap(vtd_as, n); | |
2833 | ||
f06a696d | 2834 | if (vtd_dev_to_context_entry(s, bus_n, vtd_as->devfn, &ce) == 0) { |
f06a696d PX |
2835 | trace_vtd_replay_ce_valid(bus_n, PCI_SLOT(vtd_as->devfn), |
2836 | PCI_FUNC(vtd_as->devfn), | |
2837 | VTD_CONTEXT_ENTRY_DID(ce.hi), | |
2838 | ce.hi, ce.lo); | |
dd4d607e | 2839 | vtd_page_walk(&ce, 0, ~0ULL, vtd_replay_hook, (void *)n, false); |
f06a696d PX |
2840 | } else { |
2841 | trace_vtd_replay_ce_invalid(bus_n, PCI_SLOT(vtd_as->devfn), | |
2842 | PCI_FUNC(vtd_as->devfn)); | |
2843 | } | |
2844 | ||
2845 | return; | |
2846 | } | |
2847 | ||
1da12ec4 LT |
2848 | /* Do the initialization. It will also be called when reset, so pay |
2849 | * attention when adding new initialization stuff. | |
2850 | */ | |
2851 | static void vtd_init(IntelIOMMUState *s) | |
2852 | { | |
d54bd7f8 PX |
2853 | X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s); |
2854 | ||
1da12ec4 LT |
2855 | memset(s->csr, 0, DMAR_REG_SIZE); |
2856 | memset(s->wmask, 0, DMAR_REG_SIZE); | |
2857 | memset(s->w1cmask, 0, DMAR_REG_SIZE); | |
2858 | memset(s->womask, 0, DMAR_REG_SIZE); | |
2859 | ||
1da12ec4 LT |
2860 | s->root = 0; |
2861 | s->root_extended = false; | |
2862 | s->dmar_enabled = false; | |
2863 | s->iq_head = 0; | |
2864 | s->iq_tail = 0; | |
2865 | s->iq = 0; | |
2866 | s->iq_size = 0; | |
2867 | s->qi_enabled = false; | |
2868 | s->iq_last_desc_type = VTD_INV_DESC_NONE; | |
2869 | s->next_frcd_reg = 0; | |
2870 | s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | VTD_CAP_MGAW | | |
d66b969b | 2871 | VTD_CAP_SAGAW | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS; |
ed7b8fbc | 2872 | s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO; |
1da12ec4 | 2873 | |
d54bd7f8 | 2874 | if (x86_iommu->intr_supported) { |
e6b6af05 RK |
2875 | s->ecap |= VTD_ECAP_IR | VTD_ECAP_MHMV; |
2876 | if (s->intr_eim == ON_OFF_AUTO_ON) { | |
2877 | s->ecap |= VTD_ECAP_EIM; | |
2878 | } | |
2879 | assert(s->intr_eim != ON_OFF_AUTO_AUTO); | |
d54bd7f8 PX |
2880 | } |
2881 | ||
554f5e16 JW |
2882 | if (x86_iommu->dt_supported) { |
2883 | s->ecap |= VTD_ECAP_DT; | |
2884 | } | |
2885 | ||
dbaabb25 PX |
2886 | if (x86_iommu->pt_supported) { |
2887 | s->ecap |= VTD_ECAP_PT; | |
2888 | } | |
2889 | ||
3b40f0e5 ABD |
2890 | if (s->caching_mode) { |
2891 | s->cap |= VTD_CAP_CM; | |
2892 | } | |
2893 | ||
d92fa2dc | 2894 | vtd_reset_context_cache(s); |
b5a280c0 | 2895 | vtd_reset_iotlb(s); |
d92fa2dc | 2896 | |
1da12ec4 LT |
2897 | /* Define registers with default values and bit semantics */ |
2898 | vtd_define_long(s, DMAR_VER_REG, 0x10UL, 0, 0); | |
2899 | vtd_define_quad(s, DMAR_CAP_REG, s->cap, 0, 0); | |
2900 | vtd_define_quad(s, DMAR_ECAP_REG, s->ecap, 0, 0); | |
2901 | vtd_define_long(s, DMAR_GCMD_REG, 0, 0xff800000UL, 0); | |
2902 | vtd_define_long_wo(s, DMAR_GCMD_REG, 0xff800000UL); | |
2903 | vtd_define_long(s, DMAR_GSTS_REG, 0, 0, 0); | |
2904 | vtd_define_quad(s, DMAR_RTADDR_REG, 0, 0xfffffffffffff000ULL, 0); | |
2905 | vtd_define_quad(s, DMAR_CCMD_REG, 0, 0xe0000003ffffffffULL, 0); | |
2906 | vtd_define_quad_wo(s, DMAR_CCMD_REG, 0x3ffff0000ULL); | |
2907 | ||
2908 | /* Advanced Fault Logging not supported */ | |
2909 | vtd_define_long(s, DMAR_FSTS_REG, 0, 0, 0x11UL); | |
2910 | vtd_define_long(s, DMAR_FECTL_REG, 0x80000000UL, 0x80000000UL, 0); | |
2911 | vtd_define_long(s, DMAR_FEDATA_REG, 0, 0x0000ffffUL, 0); | |
2912 | vtd_define_long(s, DMAR_FEADDR_REG, 0, 0xfffffffcUL, 0); | |
2913 | ||
2914 | /* Treated as RsvdZ when EIM in ECAP_REG is not supported | |
2915 | * vtd_define_long(s, DMAR_FEUADDR_REG, 0, 0xffffffffUL, 0); | |
2916 | */ | |
2917 | vtd_define_long(s, DMAR_FEUADDR_REG, 0, 0, 0); | |
2918 | ||
2919 | /* Treated as RO for implementations that PLMR and PHMR fields reported | |
2920 | * as Clear in the CAP_REG. | |
2921 | * vtd_define_long(s, DMAR_PMEN_REG, 0, 0x80000000UL, 0); | |
2922 | */ | |
2923 | vtd_define_long(s, DMAR_PMEN_REG, 0, 0, 0); | |
2924 | ||
ed7b8fbc LT |
2925 | vtd_define_quad(s, DMAR_IQH_REG, 0, 0, 0); |
2926 | vtd_define_quad(s, DMAR_IQT_REG, 0, 0x7fff0ULL, 0); | |
2927 | vtd_define_quad(s, DMAR_IQA_REG, 0, 0xfffffffffffff007ULL, 0); | |
2928 | vtd_define_long(s, DMAR_ICS_REG, 0, 0, 0x1UL); | |
2929 | vtd_define_long(s, DMAR_IECTL_REG, 0x80000000UL, 0x80000000UL, 0); | |
2930 | vtd_define_long(s, DMAR_IEDATA_REG, 0, 0xffffffffUL, 0); | |
2931 | vtd_define_long(s, DMAR_IEADDR_REG, 0, 0xfffffffcUL, 0); | |
2932 | /* Treadted as RsvdZ when EIM in ECAP_REG is not supported */ | |
2933 | vtd_define_long(s, DMAR_IEUADDR_REG, 0, 0, 0); | |
2934 | ||
1da12ec4 LT |
2935 | /* IOTLB registers */ |
2936 | vtd_define_quad(s, DMAR_IOTLB_REG, 0, 0Xb003ffff00000000ULL, 0); | |
2937 | vtd_define_quad(s, DMAR_IVA_REG, 0, 0xfffffffffffff07fULL, 0); | |
2938 | vtd_define_quad_wo(s, DMAR_IVA_REG, 0xfffffffffffff07fULL); | |
2939 | ||
2940 | /* Fault Recording Registers, 128-bit */ | |
2941 | vtd_define_quad(s, DMAR_FRCD_REG_0_0, 0, 0, 0); | |
2942 | vtd_define_quad(s, DMAR_FRCD_REG_0_2, 0, 0, 0x8000000000000000ULL); | |
a5861439 PX |
2943 | |
2944 | /* | |
28589311 | 2945 | * Interrupt remapping registers. |
a5861439 | 2946 | */ |
28589311 | 2947 | vtd_define_quad(s, DMAR_IRTA_REG, 0, 0xfffffffffffff80fULL, 0); |
1da12ec4 LT |
2948 | } |
2949 | ||
2950 | /* Should not reset address_spaces when reset because devices will still use | |
2951 | * the address space they got at first (won't ask the bus again). | |
2952 | */ | |
2953 | static void vtd_reset(DeviceState *dev) | |
2954 | { | |
2955 | IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev); | |
2956 | ||
1da12ec4 | 2957 | vtd_init(s); |
dd4d607e PX |
2958 | |
2959 | /* | |
2960 | * When device reset, throw away all mappings and external caches | |
2961 | */ | |
2962 | vtd_address_space_unmap_all(s); | |
1da12ec4 LT |
2963 | } |
2964 | ||
621d983a MA |
2965 | static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn) |
2966 | { | |
2967 | IntelIOMMUState *s = opaque; | |
2968 | VTDAddressSpace *vtd_as; | |
2969 | ||
8e7a0a16 | 2970 | assert(0 <= devfn && devfn < X86_IOMMU_PCI_DEVFN_MAX); |
621d983a MA |
2971 | |
2972 | vtd_as = vtd_find_add_as(s, bus, devfn); | |
2973 | return &vtd_as->as; | |
2974 | } | |
2975 | ||
e6b6af05 | 2976 | static bool vtd_decide_config(IntelIOMMUState *s, Error **errp) |
6333e93c | 2977 | { |
e6b6af05 RK |
2978 | X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s); |
2979 | ||
6333e93c RK |
2980 | /* Currently Intel IOMMU IR only support "kernel-irqchip={off|split}" */ |
2981 | if (x86_iommu->intr_supported && kvm_irqchip_in_kernel() && | |
2982 | !kvm_irqchip_is_split()) { | |
2983 | error_setg(errp, "Intel Interrupt Remapping cannot work with " | |
2984 | "kernel-irqchip=on, please use 'split|off'."); | |
2985 | return false; | |
2986 | } | |
e6b6af05 RK |
2987 | if (s->intr_eim == ON_OFF_AUTO_ON && !x86_iommu->intr_supported) { |
2988 | error_setg(errp, "eim=on cannot be selected without intremap=on"); | |
2989 | return false; | |
2990 | } | |
2991 | ||
2992 | if (s->intr_eim == ON_OFF_AUTO_AUTO) { | |
fb506e70 RK |
2993 | s->intr_eim = (kvm_irqchip_in_kernel() || s->buggy_eim) |
2994 | && x86_iommu->intr_supported ? | |
e6b6af05 RK |
2995 | ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; |
2996 | } | |
fb506e70 RK |
2997 | if (s->intr_eim == ON_OFF_AUTO_ON && !s->buggy_eim) { |
2998 | if (!kvm_irqchip_in_kernel()) { | |
2999 | error_setg(errp, "eim=on requires accel=kvm,kernel-irqchip=split"); | |
3000 | return false; | |
3001 | } | |
3002 | if (!kvm_enable_x2apic()) { | |
3003 | error_setg(errp, "eim=on requires support on the KVM side" | |
3004 | "(X2APIC_API, first shipped in v4.7)"); | |
3005 | return false; | |
3006 | } | |
3007 | } | |
e6b6af05 | 3008 | |
6333e93c RK |
3009 | return true; |
3010 | } | |
3011 | ||
1da12ec4 LT |
3012 | static void vtd_realize(DeviceState *dev, Error **errp) |
3013 | { | |
ef0e8fc7 EH |
3014 | MachineState *ms = MACHINE(qdev_get_machine()); |
3015 | MachineClass *mc = MACHINE_GET_CLASS(ms); | |
3016 | PCMachineState *pcms = | |
3017 | PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE)); | |
3018 | PCIBus *bus; | |
1da12ec4 | 3019 | IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev); |
4684a204 | 3020 | X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev); |
1da12ec4 | 3021 | |
ef0e8fc7 EH |
3022 | if (!pcms) { |
3023 | error_setg(errp, "Machine-type '%s' not supported by intel-iommu", | |
3024 | mc->name); | |
3025 | return; | |
3026 | } | |
3027 | ||
3028 | bus = pcms->bus; | |
fb9f5926 | 3029 | x86_iommu->type = TYPE_INTEL; |
6333e93c | 3030 | |
e6b6af05 | 3031 | if (!vtd_decide_config(s, errp)) { |
6333e93c RK |
3032 | return; |
3033 | } | |
3034 | ||
dd4d607e | 3035 | QLIST_INIT(&s->notifiers_list); |
7df953bd | 3036 | memset(s->vtd_as_by_bus_num, 0, sizeof(s->vtd_as_by_bus_num)); |
1da12ec4 LT |
3037 | memory_region_init_io(&s->csrmem, OBJECT(s), &vtd_mem_ops, s, |
3038 | "intel_iommu", DMAR_REG_SIZE); | |
3039 | sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->csrmem); | |
b5a280c0 LT |
3040 | /* No corresponding destroy */ |
3041 | s->iotlb = g_hash_table_new_full(vtd_uint64_hash, vtd_uint64_equal, | |
3042 | g_free, g_free); | |
7df953bd KO |
3043 | s->vtd_as_by_busptr = g_hash_table_new_full(vtd_uint64_hash, vtd_uint64_equal, |
3044 | g_free, g_free); | |
1da12ec4 | 3045 | vtd_init(s); |
621d983a MA |
3046 | sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, Q35_HOST_BRIDGE_IOMMU_ADDR); |
3047 | pci_setup_iommu(bus, vtd_host_dma_iommu, dev); | |
cb135f59 PX |
3048 | /* Pseudo address space under root PCI bus. */ |
3049 | pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC); | |
1da12ec4 LT |
3050 | } |
3051 | ||
3052 | static void vtd_class_init(ObjectClass *klass, void *data) | |
3053 | { | |
3054 | DeviceClass *dc = DEVICE_CLASS(klass); | |
1c7955c4 | 3055 | X86IOMMUClass *x86_class = X86_IOMMU_CLASS(klass); |
1da12ec4 LT |
3056 | |
3057 | dc->reset = vtd_reset; | |
1da12ec4 LT |
3058 | dc->vmsd = &vtd_vmstate; |
3059 | dc->props = vtd_properties; | |
621d983a | 3060 | dc->hotpluggable = false; |
1c7955c4 | 3061 | x86_class->realize = vtd_realize; |
8b5ed7df | 3062 | x86_class->int_remap = vtd_int_remap; |
8ab5700c | 3063 | /* Supported by the pc-q35-* machine types */ |
e4f4fb1e | 3064 | dc->user_creatable = true; |
1da12ec4 LT |
3065 | } |
3066 | ||
3067 | static const TypeInfo vtd_info = { | |
3068 | .name = TYPE_INTEL_IOMMU_DEVICE, | |
1c7955c4 | 3069 | .parent = TYPE_X86_IOMMU_DEVICE, |
1da12ec4 LT |
3070 | .instance_size = sizeof(IntelIOMMUState), |
3071 | .class_init = vtd_class_init, | |
3072 | }; | |
3073 | ||
1221a474 AK |
3074 | static void vtd_iommu_memory_region_class_init(ObjectClass *klass, |
3075 | void *data) | |
3076 | { | |
3077 | IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); | |
3078 | ||
3079 | imrc->translate = vtd_iommu_translate; | |
3080 | imrc->notify_flag_changed = vtd_iommu_notify_flag_changed; | |
3081 | imrc->replay = vtd_iommu_replay; | |
3082 | } | |
3083 | ||
3084 | static const TypeInfo vtd_iommu_memory_region_info = { | |
3085 | .parent = TYPE_IOMMU_MEMORY_REGION, | |
3086 | .name = TYPE_INTEL_IOMMU_MEMORY_REGION, | |
3087 | .class_init = vtd_iommu_memory_region_class_init, | |
3088 | }; | |
3089 | ||
1da12ec4 LT |
3090 | static void vtd_register_types(void) |
3091 | { | |
1da12ec4 | 3092 | type_register_static(&vtd_info); |
1221a474 | 3093 | type_register_static(&vtd_iommu_memory_region_info); |
1da12ec4 LT |
3094 | } |
3095 | ||
3096 | type_init(vtd_register_types) |