Commit | Line | Data |
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5ead97c8 JF |
1 | /* |
2 | * Machine specific setup for xen | |
3 | * | |
4 | * Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007 | |
5 | */ | |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/sched.h> | |
9 | #include <linux/mm.h> | |
10 | #include <linux/pm.h> | |
a9ce6bc1 | 11 | #include <linux/memblock.h> |
d91ee586 | 12 | #include <linux/cpuidle.h> |
48cdd828 | 13 | #include <linux/cpufreq.h> |
5ead97c8 JF |
14 | |
15 | #include <asm/elf.h> | |
6c3652ef | 16 | #include <asm/vdso.h> |
5ead97c8 JF |
17 | #include <asm/e820.h> |
18 | #include <asm/setup.h> | |
b792c755 | 19 | #include <asm/acpi.h> |
5ead97c8 JF |
20 | #include <asm/xen/hypervisor.h> |
21 | #include <asm/xen/hypercall.h> | |
22 | ||
45263cb0 | 23 | #include <xen/xen.h> |
8006ec3e | 24 | #include <xen/page.h> |
e2a81baf | 25 | #include <xen/interface/callback.h> |
35ae11fd | 26 | #include <xen/interface/memory.h> |
5ead97c8 JF |
27 | #include <xen/interface/physdev.h> |
28 | #include <xen/features.h> | |
5ead97c8 | 29 | #include "xen-ops.h" |
d2eea68e | 30 | #include "vdso.h" |
5ead97c8 JF |
31 | |
32 | /* These are code, but not functions. Defined in entry.S */ | |
33 | extern const char xen_hypervisor_callback[]; | |
34 | extern const char xen_failsafe_callback[]; | |
f63c2f24 T |
35 | extern void xen_sysenter_target(void); |
36 | extern void xen_syscall_target(void); | |
37 | extern void xen_syscall32_target(void); | |
5ead97c8 | 38 | |
42ee1471 | 39 | /* Amount of extra memory space we add to the e820 ranges */ |
8b5d44a5 | 40 | struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata; |
42ee1471 | 41 | |
aa24411b DV |
42 | /* Number of pages released from the initial allocation. */ |
43 | unsigned long xen_released_pages; | |
44 | ||
698bb8d1 JF |
45 | /* |
46 | * The maximum amount of extra memory compared to the base size. The | |
47 | * main scaling factor is the size of struct page. At extreme ratios | |
48 | * of base:extra, all the base memory can be filled with page | |
49 | * structures for the extra memory, leaving no space for anything | |
50 | * else. | |
51 | * | |
52 | * 10x seems like a reasonable balance between scaling flexibility and | |
53 | * leaving a practically usable system. | |
54 | */ | |
55 | #define EXTRA_MEM_RATIO (10) | |
56 | ||
dc91c728 | 57 | static void __init xen_add_extra_mem(u64 start, u64 size) |
42ee1471 | 58 | { |
6eaa412f | 59 | unsigned long pfn; |
dc91c728 | 60 | int i; |
6eaa412f | 61 | |
dc91c728 DV |
62 | for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) { |
63 | /* Add new region. */ | |
64 | if (xen_extra_mem[i].size == 0) { | |
65 | xen_extra_mem[i].start = start; | |
66 | xen_extra_mem[i].size = size; | |
67 | break; | |
68 | } | |
69 | /* Append to existing region. */ | |
70 | if (xen_extra_mem[i].start + xen_extra_mem[i].size == start) { | |
71 | xen_extra_mem[i].size += size; | |
72 | break; | |
73 | } | |
74 | } | |
75 | if (i == XEN_EXTRA_MEM_MAX_REGIONS) | |
76 | printk(KERN_WARNING "Warning: not enough extra memory regions\n"); | |
42ee1471 | 77 | |
d4bbf7e7 | 78 | memblock_reserve(start, size); |
2f7acb20 | 79 | |
dc91c728 | 80 | xen_max_p2m_pfn = PFN_DOWN(start + size); |
c96aae1f KRW |
81 | for (pfn = PFN_DOWN(start); pfn < xen_max_p2m_pfn; pfn++) { |
82 | unsigned long mfn = pfn_to_mfn(pfn); | |
83 | ||
84 | if (WARN(mfn == pfn, "Trying to over-write 1-1 mapping (pfn: %lx)\n", pfn)) | |
85 | continue; | |
86 | WARN(mfn != INVALID_P2M_ENTRY, "Trying to remove %lx which has %lx mfn!\n", | |
87 | pfn, mfn); | |
6eaa412f | 88 | |
6eaa412f | 89 | __set_phys_to_machine(pfn, INVALID_P2M_ENTRY); |
c96aae1f | 90 | } |
42ee1471 JF |
91 | } |
92 | ||
96dc08b3 KRW |
93 | static unsigned long __init xen_do_chunk(unsigned long start, |
94 | unsigned long end, bool release) | |
093d7b46 MR |
95 | { |
96 | struct xen_memory_reservation reservation = { | |
97 | .address_bits = 0, | |
98 | .extent_order = 0, | |
99 | .domid = DOMID_SELF | |
100 | }; | |
f89e048e | 101 | unsigned long len = 0; |
093d7b46 MR |
102 | unsigned long pfn; |
103 | int ret; | |
104 | ||
2e2fb754 KRW |
105 | for (pfn = start; pfn < end; pfn++) { |
106 | unsigned long frame; | |
96dc08b3 | 107 | unsigned long mfn = pfn_to_mfn(pfn); |
2e2fb754 | 108 | |
96dc08b3 KRW |
109 | if (release) { |
110 | /* Make sure pfn exists to start with */ | |
111 | if (mfn == INVALID_P2M_ENTRY || mfn_to_pfn(mfn) != pfn) | |
112 | continue; | |
113 | frame = mfn; | |
114 | } else { | |
115 | if (mfn != INVALID_P2M_ENTRY) | |
116 | continue; | |
117 | frame = pfn; | |
118 | } | |
2e2fb754 KRW |
119 | set_xen_guest_handle(reservation.extent_start, &frame); |
120 | reservation.nr_extents = 1; | |
121 | ||
96dc08b3 KRW |
122 | ret = HYPERVISOR_memory_op(release ? XENMEM_decrease_reservation : XENMEM_populate_physmap, |
123 | &reservation); | |
124 | WARN(ret != 1, "Failed to %s pfn %lx err=%d\n", | |
125 | release ? "release" : "populate", pfn, ret); | |
126 | ||
2e2fb754 | 127 | if (ret == 1) { |
96dc08b3 KRW |
128 | if (!early_set_phys_to_machine(pfn, release ? INVALID_P2M_ENTRY : frame)) { |
129 | if (release) | |
130 | break; | |
2e2fb754 KRW |
131 | set_xen_guest_handle(reservation.extent_start, &frame); |
132 | reservation.nr_extents = 1; | |
133 | ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, | |
96dc08b3 | 134 | &reservation); |
2e2fb754 KRW |
135 | break; |
136 | } | |
137 | len++; | |
138 | } else | |
139 | break; | |
140 | } | |
141 | if (len) | |
96dc08b3 KRW |
142 | printk(KERN_INFO "%s %lx-%lx pfn range: %lu pages %s\n", |
143 | release ? "Freeing" : "Populating", | |
144 | start, end, len, | |
145 | release ? "freed" : "added"); | |
146 | ||
2e2fb754 KRW |
147 | return len; |
148 | } | |
83d51ab4 DV |
149 | |
150 | static unsigned long __init xen_release_chunk(unsigned long start, | |
151 | unsigned long end) | |
152 | { | |
153 | return xen_do_chunk(start, end, true); | |
154 | } | |
155 | ||
2e2fb754 KRW |
156 | static unsigned long __init xen_populate_chunk( |
157 | const struct e820entry *list, size_t map_size, | |
158 | unsigned long max_pfn, unsigned long *last_pfn, | |
159 | unsigned long credits_left) | |
160 | { | |
161 | const struct e820entry *entry; | |
162 | unsigned int i; | |
163 | unsigned long done = 0; | |
164 | unsigned long dest_pfn; | |
165 | ||
166 | for (i = 0, entry = list; i < map_size; i++, entry++) { | |
2e2fb754 KRW |
167 | unsigned long s_pfn; |
168 | unsigned long e_pfn; | |
169 | unsigned long pfns; | |
170 | long capacity; | |
171 | ||
c3d93f88 | 172 | if (credits_left <= 0) |
2e2fb754 KRW |
173 | break; |
174 | ||
175 | if (entry->type != E820_RAM) | |
176 | continue; | |
177 | ||
c3d93f88 | 178 | e_pfn = PFN_DOWN(entry->addr + entry->size); |
2e2fb754 KRW |
179 | |
180 | /* We only care about E820 after the xen_start_info->nr_pages */ | |
181 | if (e_pfn <= max_pfn) | |
182 | continue; | |
183 | ||
c3d93f88 | 184 | s_pfn = PFN_UP(entry->addr); |
2e2fb754 KRW |
185 | /* If the E820 falls within the nr_pages, we want to start |
186 | * at the nr_pages PFN. | |
187 | * If that would mean going past the E820 entry, skip it | |
188 | */ | |
189 | if (s_pfn <= max_pfn) { | |
190 | capacity = e_pfn - max_pfn; | |
191 | dest_pfn = max_pfn; | |
192 | } else { | |
2e2fb754 KRW |
193 | capacity = e_pfn - s_pfn; |
194 | dest_pfn = s_pfn; | |
195 | } | |
2e2fb754 | 196 | |
c3d93f88 | 197 | if (credits_left < capacity) |
198 | capacity = credits_left; | |
2e2fb754 | 199 | |
c3d93f88 | 200 | pfns = xen_do_chunk(dest_pfn, dest_pfn + capacity, false); |
2e2fb754 | 201 | done += pfns; |
2e2fb754 | 202 | *last_pfn = (dest_pfn + pfns); |
c3d93f88 | 203 | if (pfns < capacity) |
204 | break; | |
205 | credits_left -= pfns; | |
2e2fb754 KRW |
206 | } |
207 | return done; | |
208 | } | |
83d51ab4 DV |
209 | |
210 | static void __init xen_set_identity_and_release_chunk( | |
211 | unsigned long start_pfn, unsigned long end_pfn, unsigned long nr_pages, | |
212 | unsigned long *released, unsigned long *identity) | |
213 | { | |
214 | unsigned long pfn; | |
215 | ||
216 | /* | |
217 | * If the PFNs are currently mapped, the VA mapping also needs | |
218 | * to be updated to be 1:1. | |
219 | */ | |
220 | for (pfn = start_pfn; pfn <= max_pfn_mapped && pfn < end_pfn; pfn++) | |
221 | (void)HYPERVISOR_update_va_mapping( | |
222 | (unsigned long)__va(pfn << PAGE_SHIFT), | |
223 | mfn_pte(pfn, PAGE_KERNEL_IO), 0); | |
224 | ||
225 | if (start_pfn < nr_pages) | |
226 | *released += xen_release_chunk( | |
227 | start_pfn, min(end_pfn, nr_pages)); | |
228 | ||
229 | *identity += set_phys_range_identity(start_pfn, end_pfn); | |
230 | } | |
231 | ||
f3f436e3 DV |
232 | static unsigned long __init xen_set_identity_and_release( |
233 | const struct e820entry *list, size_t map_size, unsigned long nr_pages) | |
093d7b46 | 234 | { |
f3f436e3 | 235 | phys_addr_t start = 0; |
093d7b46 | 236 | unsigned long released = 0; |
68df0da7 | 237 | unsigned long identity = 0; |
f3f436e3 | 238 | const struct e820entry *entry; |
68df0da7 KRW |
239 | int i; |
240 | ||
f3f436e3 DV |
241 | /* |
242 | * Combine non-RAM regions and gaps until a RAM region (or the | |
243 | * end of the map) is reached, then set the 1:1 map and | |
244 | * release the pages (if available) in those non-RAM regions. | |
245 | * | |
246 | * The combined non-RAM regions are rounded to a whole number | |
247 | * of pages so any partial pages are accessible via the 1:1 | |
248 | * mapping. This is needed for some BIOSes that put (for | |
249 | * example) the DMI tables in a reserved region that begins on | |
250 | * a non-page boundary. | |
251 | */ | |
68df0da7 | 252 | for (i = 0, entry = list; i < map_size; i++, entry++) { |
f3f436e3 | 253 | phys_addr_t end = entry->addr + entry->size; |
f3f436e3 DV |
254 | if (entry->type == E820_RAM || i == map_size - 1) { |
255 | unsigned long start_pfn = PFN_DOWN(start); | |
256 | unsigned long end_pfn = PFN_UP(end); | |
68df0da7 | 257 | |
f3f436e3 DV |
258 | if (entry->type == E820_RAM) |
259 | end_pfn = PFN_UP(entry->addr); | |
68df0da7 | 260 | |
83d51ab4 DV |
261 | if (start_pfn < end_pfn) |
262 | xen_set_identity_and_release_chunk( | |
263 | start_pfn, end_pfn, nr_pages, | |
264 | &released, &identity); | |
68df0da7 | 265 | |
f3f436e3 | 266 | start = end; |
68df0da7 | 267 | } |
68df0da7 | 268 | } |
f3f436e3 | 269 | |
ca118238 KRW |
270 | if (released) |
271 | printk(KERN_INFO "Released %lu pages of unused memory\n", released); | |
272 | if (identity) | |
273 | printk(KERN_INFO "Set %ld page(s) to 1-1 mapping\n", identity); | |
f3f436e3 DV |
274 | |
275 | return released; | |
68df0da7 | 276 | } |
d312ae87 DV |
277 | |
278 | static unsigned long __init xen_get_max_pages(void) | |
279 | { | |
280 | unsigned long max_pages = MAX_DOMAIN_PAGES; | |
281 | domid_t domid = DOMID_SELF; | |
282 | int ret; | |
283 | ||
d3db7281 IC |
284 | /* |
285 | * For the initial domain we use the maximum reservation as | |
286 | * the maximum page. | |
287 | * | |
288 | * For guest domains the current maximum reservation reflects | |
289 | * the current maximum rather than the static maximum. In this | |
290 | * case the e820 map provided to us will cover the static | |
291 | * maximum region. | |
292 | */ | |
293 | if (xen_initial_domain()) { | |
294 | ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid); | |
295 | if (ret > 0) | |
296 | max_pages = ret; | |
297 | } | |
298 | ||
d312ae87 DV |
299 | return min(max_pages, MAX_DOMAIN_PAGES); |
300 | } | |
301 | ||
dc91c728 DV |
302 | static void xen_align_and_add_e820_region(u64 start, u64 size, int type) |
303 | { | |
304 | u64 end = start + size; | |
305 | ||
306 | /* Align RAM regions to page boundaries. */ | |
307 | if (type == E820_RAM) { | |
308 | start = PAGE_ALIGN(start); | |
309 | end &= ~((u64)PAGE_SIZE - 1); | |
310 | } | |
311 | ||
312 | e820_add_region(start, end - start, type); | |
313 | } | |
314 | ||
5ead97c8 JF |
315 | /** |
316 | * machine_specific_memory_setup - Hook for machine specific memory setup. | |
317 | **/ | |
5ead97c8 JF |
318 | char * __init xen_memory_setup(void) |
319 | { | |
35ae11fd IC |
320 | static struct e820entry map[E820MAX] __initdata; |
321 | ||
5ead97c8 | 322 | unsigned long max_pfn = xen_start_info->nr_pages; |
35ae11fd IC |
323 | unsigned long long mem_end; |
324 | int rc; | |
325 | struct xen_memory_map memmap; | |
dc91c728 | 326 | unsigned long max_pages; |
2e2fb754 | 327 | unsigned long last_pfn = 0; |
42ee1471 | 328 | unsigned long extra_pages = 0; |
2e2fb754 | 329 | unsigned long populated; |
35ae11fd | 330 | int i; |
9e9a5fcb | 331 | int op; |
5ead97c8 | 332 | |
8006ec3e | 333 | max_pfn = min(MAX_DOMAIN_PAGES, max_pfn); |
35ae11fd IC |
334 | mem_end = PFN_PHYS(max_pfn); |
335 | ||
336 | memmap.nr_entries = E820MAX; | |
337 | set_xen_guest_handle(memmap.buffer, map); | |
338 | ||
9e9a5fcb IC |
339 | op = xen_initial_domain() ? |
340 | XENMEM_machine_memory_map : | |
341 | XENMEM_memory_map; | |
342 | rc = HYPERVISOR_memory_op(op, &memmap); | |
35ae11fd | 343 | if (rc == -ENOSYS) { |
9ec23a7f | 344 | BUG_ON(xen_initial_domain()); |
35ae11fd IC |
345 | memmap.nr_entries = 1; |
346 | map[0].addr = 0ULL; | |
347 | map[0].size = mem_end; | |
348 | /* 8MB slack (to balance backend allocations). */ | |
349 | map[0].size += 8ULL << 20; | |
350 | map[0].type = E820_RAM; | |
351 | rc = 0; | |
352 | } | |
353 | BUG_ON(rc); | |
8006ec3e | 354 | |
dc91c728 DV |
355 | /* Make sure the Xen-supplied memory map is well-ordered. */ |
356 | sanitize_e820_map(map, memmap.nr_entries, &memmap.nr_entries); | |
357 | ||
358 | max_pages = xen_get_max_pages(); | |
359 | if (max_pages > max_pfn) | |
360 | extra_pages += max_pages - max_pfn; | |
361 | ||
f3f436e3 DV |
362 | /* |
363 | * Set P2M for all non-RAM pages and E820 gaps to be identity | |
364 | * type PFNs. Any RAM pages that would be made inaccesible by | |
365 | * this are first released. | |
366 | */ | |
367 | xen_released_pages = xen_set_identity_and_release( | |
368 | map, memmap.nr_entries, max_pfn); | |
dc91c728 | 369 | |
2e2fb754 KRW |
370 | /* |
371 | * Populate back the non-RAM pages and E820 gaps that had been | |
372 | * released. */ | |
373 | populated = xen_populate_chunk(map, memmap.nr_entries, | |
374 | max_pfn, &last_pfn, xen_released_pages); | |
375 | ||
58b7b53a KRW |
376 | xen_released_pages -= populated; |
377 | extra_pages += xen_released_pages; | |
2e2fb754 KRW |
378 | |
379 | if (last_pfn > max_pfn) { | |
380 | max_pfn = min(MAX_DOMAIN_PAGES, last_pfn); | |
381 | mem_end = PFN_PHYS(max_pfn); | |
382 | } | |
dc91c728 DV |
383 | /* |
384 | * Clamp the amount of extra memory to a EXTRA_MEM_RATIO | |
385 | * factor the base size. On non-highmem systems, the base | |
386 | * size is the full initial memory allocation; on highmem it | |
387 | * is limited to the max size of lowmem, so that it doesn't | |
388 | * get completely filled. | |
389 | * | |
390 | * In principle there could be a problem in lowmem systems if | |
391 | * the initial memory is also very large with respect to | |
392 | * lowmem, but we won't try to deal with that here. | |
393 | */ | |
394 | extra_pages = min(EXTRA_MEM_RATIO * min(max_pfn, PFN_DOWN(MAXMEM)), | |
395 | extra_pages); | |
dc91c728 DV |
396 | i = 0; |
397 | while (i < memmap.nr_entries) { | |
398 | u64 addr = map[i].addr; | |
399 | u64 size = map[i].size; | |
400 | u32 type = map[i].type; | |
401 | ||
402 | if (type == E820_RAM) { | |
403 | if (addr < mem_end) { | |
404 | size = min(size, mem_end - addr); | |
405 | } else if (extra_pages) { | |
406 | size = min(size, (u64)extra_pages * PAGE_SIZE); | |
407 | extra_pages -= size / PAGE_SIZE; | |
408 | xen_add_extra_mem(addr, size); | |
409 | } else | |
410 | type = E820_UNUSABLE; | |
3654581e JF |
411 | } |
412 | ||
dc91c728 | 413 | xen_align_and_add_e820_region(addr, size, type); |
b5b43ced | 414 | |
dc91c728 DV |
415 | map[i].addr += size; |
416 | map[i].size -= size; | |
417 | if (map[i].size == 0) | |
418 | i++; | |
35ae11fd | 419 | } |
b792c755 JF |
420 | |
421 | /* | |
9ec23a7f IC |
422 | * In domU, the ISA region is normal, usable memory, but we |
423 | * reserve ISA memory anyway because too many things poke | |
b792c755 JF |
424 | * about in there. |
425 | */ | |
426 | e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS, | |
427 | E820_RESERVED); | |
5ead97c8 | 428 | |
be5bf9fa JF |
429 | /* |
430 | * Reserve Xen bits: | |
431 | * - mfn_list | |
432 | * - xen_start_info | |
433 | * See comment above "struct start_info" in <xen/interface/xen.h> | |
434 | */ | |
24aa0788 TH |
435 | memblock_reserve(__pa(xen_start_info->mfn_list), |
436 | xen_start_info->pt_base - xen_start_info->mfn_list); | |
be5bf9fa JF |
437 | |
438 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
439 | ||
5ead97c8 JF |
440 | return "Xen"; |
441 | } | |
442 | ||
d2eea68e RM |
443 | /* |
444 | * Set the bit indicating "nosegneg" library variants should be used. | |
6a52e4b1 JF |
445 | * We only need to bother in pure 32-bit mode; compat 32-bit processes |
446 | * can have un-truncated segments, so wrapping around is allowed. | |
d2eea68e | 447 | */ |
08b6d290 | 448 | static void __init fiddle_vdso(void) |
d2eea68e | 449 | { |
6a52e4b1 JF |
450 | #ifdef CONFIG_X86_32 |
451 | u32 *mask; | |
452 | mask = VDSO32_SYMBOL(&vdso32_int80_start, NOTE_MASK); | |
453 | *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT; | |
454 | mask = VDSO32_SYMBOL(&vdso32_sysenter_start, NOTE_MASK); | |
d2eea68e | 455 | *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT; |
6fcac6d3 | 456 | #endif |
d2eea68e RM |
457 | } |
458 | ||
ae15a3b4 | 459 | static int __cpuinit register_callback(unsigned type, const void *func) |
e2a81baf | 460 | { |
88459d4c JF |
461 | struct callback_register callback = { |
462 | .type = type, | |
463 | .address = XEN_CALLBACK(__KERNEL_CS, func), | |
e2a81baf JF |
464 | .flags = CALLBACKF_mask_events, |
465 | }; | |
466 | ||
88459d4c JF |
467 | return HYPERVISOR_callback_op(CALLBACKOP_register, &callback); |
468 | } | |
469 | ||
470 | void __cpuinit xen_enable_sysenter(void) | |
471 | { | |
6fcac6d3 | 472 | int ret; |
62541c37 | 473 | unsigned sysenter_feature; |
6fcac6d3 JF |
474 | |
475 | #ifdef CONFIG_X86_32 | |
62541c37 | 476 | sysenter_feature = X86_FEATURE_SEP; |
6fcac6d3 | 477 | #else |
62541c37 | 478 | sysenter_feature = X86_FEATURE_SYSENTER32; |
6fcac6d3 | 479 | #endif |
88459d4c | 480 | |
62541c37 JF |
481 | if (!boot_cpu_has(sysenter_feature)) |
482 | return; | |
483 | ||
6fcac6d3 | 484 | ret = register_callback(CALLBACKTYPE_sysenter, xen_sysenter_target); |
62541c37 JF |
485 | if(ret != 0) |
486 | setup_clear_cpu_cap(sysenter_feature); | |
e2a81baf JF |
487 | } |
488 | ||
6fcac6d3 JF |
489 | void __cpuinit xen_enable_syscall(void) |
490 | { | |
491 | #ifdef CONFIG_X86_64 | |
6fcac6d3 | 492 | int ret; |
6fcac6d3 JF |
493 | |
494 | ret = register_callback(CALLBACKTYPE_syscall, xen_syscall_target); | |
495 | if (ret != 0) { | |
d5303b81 | 496 | printk(KERN_ERR "Failed to set syscall callback: %d\n", ret); |
62541c37 JF |
497 | /* Pretty fatal; 64-bit userspace has no other |
498 | mechanism for syscalls. */ | |
499 | } | |
500 | ||
501 | if (boot_cpu_has(X86_FEATURE_SYSCALL32)) { | |
6fcac6d3 JF |
502 | ret = register_callback(CALLBACKTYPE_syscall32, |
503 | xen_syscall32_target); | |
d5303b81 | 504 | if (ret != 0) |
62541c37 | 505 | setup_clear_cpu_cap(X86_FEATURE_SYSCALL32); |
6fcac6d3 JF |
506 | } |
507 | #endif /* CONFIG_X86_64 */ | |
508 | } | |
509 | ||
5ead97c8 JF |
510 | void __init xen_arch_setup(void) |
511 | { | |
f09f6d19 DD |
512 | xen_panic_handler_init(); |
513 | ||
5ead97c8 JF |
514 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments); |
515 | HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables); | |
516 | ||
517 | if (!xen_feature(XENFEAT_auto_translated_physmap)) | |
f63c2f24 T |
518 | HYPERVISOR_vm_assist(VMASST_CMD_enable, |
519 | VMASST_TYPE_pae_extended_cr3); | |
5ead97c8 | 520 | |
88459d4c JF |
521 | if (register_callback(CALLBACKTYPE_event, xen_hypervisor_callback) || |
522 | register_callback(CALLBACKTYPE_failsafe, xen_failsafe_callback)) | |
523 | BUG(); | |
5ead97c8 | 524 | |
e2a81baf | 525 | xen_enable_sysenter(); |
6fcac6d3 | 526 | xen_enable_syscall(); |
e2a81baf | 527 | |
5ead97c8 JF |
528 | #ifdef CONFIG_ACPI |
529 | if (!(xen_start_info->flags & SIF_INITDOMAIN)) { | |
530 | printk(KERN_INFO "ACPI in unprivileged domain disabled\n"); | |
531 | disable_acpi(); | |
532 | } | |
533 | #endif | |
534 | ||
535 | memcpy(boot_command_line, xen_start_info->cmd_line, | |
536 | MAX_GUEST_CMDLINE > COMMAND_LINE_SIZE ? | |
537 | COMMAND_LINE_SIZE : MAX_GUEST_CMDLINE); | |
538 | ||
bc15fde7 JF |
539 | /* Set up idle, making sure it calls safe_halt() pvop */ |
540 | #ifdef CONFIG_X86_32 | |
541 | boot_cpu_data.hlt_works_ok = 1; | |
542 | #endif | |
d91ee586 | 543 | disable_cpuidle(); |
48cdd828 | 544 | disable_cpufreq(); |
e5fd47bf | 545 | WARN_ON(set_pm_idle_to_default()); |
d2eea68e | 546 | fiddle_vdso(); |
5ead97c8 | 547 | } |