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Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
7 | * | |
8 | * Authors: | |
9 | * Avi Kivity <avi@qumranet.com> | |
10 | * Yaniv Kamay <yaniv@qumranet.com> | |
11 | * | |
12 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
13 | * the COPYING file in the top-level directory. | |
14 | * | |
15 | */ | |
16 | ||
edf88417 | 17 | #include <linux/kvm_host.h> |
5fb76f9b | 18 | #include "segment_descriptor.h" |
313a3dc7 | 19 | #include "irq.h" |
1d737c8a | 20 | #include "mmu.h" |
313a3dc7 CO |
21 | |
22 | #include <linux/kvm.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/vmalloc.h> | |
5fb76f9b | 25 | #include <linux/module.h> |
0de10343 | 26 | #include <linux/mman.h> |
2bacc55c | 27 | #include <linux/highmem.h> |
043405e1 CO |
28 | |
29 | #include <asm/uaccess.h> | |
d825ed0a | 30 | #include <asm/msr.h> |
043405e1 | 31 | |
313a3dc7 | 32 | #define MAX_IO_MSRS 256 |
a03490ed CO |
33 | #define CR0_RESERVED_BITS \ |
34 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
35 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
36 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
37 | #define CR4_RESERVED_BITS \ | |
38 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
39 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
40 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
41 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
42 | ||
43 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
15c4a640 | 44 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe |
313a3dc7 | 45 | |
ba1389b7 AK |
46 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
47 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 48 | |
674eea0f AK |
49 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
50 | struct kvm_cpuid_entry2 __user *entries); | |
51 | ||
97896d04 ZX |
52 | struct kvm_x86_ops *kvm_x86_ops; |
53 | ||
417bc304 | 54 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
55 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
56 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
57 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
58 | { "invlpg", VCPU_STAT(invlpg) }, | |
59 | { "exits", VCPU_STAT(exits) }, | |
60 | { "io_exits", VCPU_STAT(io_exits) }, | |
61 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
62 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
63 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
64 | { "halt_exits", VCPU_STAT(halt_exits) }, | |
65 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
66 | { "request_irq", VCPU_STAT(request_irq_exits) }, | |
67 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
68 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
69 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
70 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
71 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
72 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
4cee5764 AK |
73 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
74 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
75 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
76 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
77 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
78 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 79 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
0f74a24c | 80 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
417bc304 HB |
81 | { NULL } |
82 | }; | |
83 | ||
84 | ||
5fb76f9b CO |
85 | unsigned long segment_base(u16 selector) |
86 | { | |
87 | struct descriptor_table gdt; | |
88 | struct segment_descriptor *d; | |
89 | unsigned long table_base; | |
90 | unsigned long v; | |
91 | ||
92 | if (selector == 0) | |
93 | return 0; | |
94 | ||
95 | asm("sgdt %0" : "=m"(gdt)); | |
96 | table_base = gdt.base; | |
97 | ||
98 | if (selector & 4) { /* from ldt */ | |
99 | u16 ldt_selector; | |
100 | ||
101 | asm("sldt %0" : "=g"(ldt_selector)); | |
102 | table_base = segment_base(ldt_selector); | |
103 | } | |
104 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
105 | v = d->base_low | ((unsigned long)d->base_mid << 16) | | |
106 | ((unsigned long)d->base_high << 24); | |
107 | #ifdef CONFIG_X86_64 | |
108 | if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) | |
109 | v |= ((unsigned long) \ | |
110 | ((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
111 | #endif | |
112 | return v; | |
113 | } | |
114 | EXPORT_SYMBOL_GPL(segment_base); | |
115 | ||
6866b83e CO |
116 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
117 | { | |
118 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 119 | return vcpu->arch.apic_base; |
6866b83e | 120 | else |
ad312c7c | 121 | return vcpu->arch.apic_base; |
6866b83e CO |
122 | } |
123 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
124 | ||
125 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
126 | { | |
127 | /* TODO: reserve bits check */ | |
128 | if (irqchip_in_kernel(vcpu->kvm)) | |
129 | kvm_lapic_set_base(vcpu, data); | |
130 | else | |
ad312c7c | 131 | vcpu->arch.apic_base = data; |
6866b83e CO |
132 | } |
133 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
134 | ||
298101da AK |
135 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
136 | { | |
ad312c7c ZX |
137 | WARN_ON(vcpu->arch.exception.pending); |
138 | vcpu->arch.exception.pending = true; | |
139 | vcpu->arch.exception.has_error_code = false; | |
140 | vcpu->arch.exception.nr = nr; | |
298101da AK |
141 | } |
142 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
143 | ||
c3c91fee AK |
144 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
145 | u32 error_code) | |
146 | { | |
147 | ++vcpu->stat.pf_guest; | |
ad312c7c | 148 | if (vcpu->arch.exception.pending && vcpu->arch.exception.nr == PF_VECTOR) { |
c3c91fee AK |
149 | printk(KERN_DEBUG "kvm: inject_page_fault:" |
150 | " double fault 0x%lx\n", addr); | |
ad312c7c ZX |
151 | vcpu->arch.exception.nr = DF_VECTOR; |
152 | vcpu->arch.exception.error_code = 0; | |
c3c91fee AK |
153 | return; |
154 | } | |
ad312c7c | 155 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
156 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
157 | } | |
158 | ||
298101da AK |
159 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
160 | { | |
ad312c7c ZX |
161 | WARN_ON(vcpu->arch.exception.pending); |
162 | vcpu->arch.exception.pending = true; | |
163 | vcpu->arch.exception.has_error_code = true; | |
164 | vcpu->arch.exception.nr = nr; | |
165 | vcpu->arch.exception.error_code = error_code; | |
298101da AK |
166 | } |
167 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
168 | ||
169 | static void __queue_exception(struct kvm_vcpu *vcpu) | |
170 | { | |
ad312c7c ZX |
171 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
172 | vcpu->arch.exception.has_error_code, | |
173 | vcpu->arch.exception.error_code); | |
298101da AK |
174 | } |
175 | ||
a03490ed CO |
176 | /* |
177 | * Load the pae pdptrs. Return true is they are all valid. | |
178 | */ | |
179 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
180 | { | |
181 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
182 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
183 | int i; | |
184 | int ret; | |
ad312c7c | 185 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 186 | |
10589a46 | 187 | down_read(¤t->mm->mmap_sem); |
a03490ed CO |
188 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
189 | offset * sizeof(u64), sizeof(pdpte)); | |
190 | if (ret < 0) { | |
191 | ret = 0; | |
192 | goto out; | |
193 | } | |
194 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
195 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
196 | ret = 0; | |
197 | goto out; | |
198 | } | |
199 | } | |
200 | ret = 1; | |
201 | ||
ad312c7c | 202 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
a03490ed | 203 | out: |
10589a46 | 204 | up_read(¤t->mm->mmap_sem); |
a03490ed CO |
205 | |
206 | return ret; | |
207 | } | |
208 | ||
d835dfec AK |
209 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
210 | { | |
ad312c7c | 211 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
212 | bool changed = true; |
213 | int r; | |
214 | ||
215 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
216 | return false; | |
217 | ||
10589a46 | 218 | down_read(¤t->mm->mmap_sem); |
ad312c7c | 219 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
220 | if (r < 0) |
221 | goto out; | |
ad312c7c | 222 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 223 | out: |
10589a46 | 224 | up_read(¤t->mm->mmap_sem); |
d835dfec AK |
225 | |
226 | return changed; | |
227 | } | |
228 | ||
a03490ed CO |
229 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
230 | { | |
231 | if (cr0 & CR0_RESERVED_BITS) { | |
232 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 233 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 234 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
235 | return; |
236 | } | |
237 | ||
238 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
239 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 240 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
241 | return; |
242 | } | |
243 | ||
244 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
245 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
246 | "and a clear PE flag\n"); | |
c1a5d4f9 | 247 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
248 | return; |
249 | } | |
250 | ||
251 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
252 | #ifdef CONFIG_X86_64 | |
ad312c7c | 253 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
254 | int cs_db, cs_l; |
255 | ||
256 | if (!is_pae(vcpu)) { | |
257 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
258 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 259 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
260 | return; |
261 | } | |
262 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
263 | if (cs_l) { | |
264 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
265 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 266 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
267 | return; |
268 | ||
269 | } | |
270 | } else | |
271 | #endif | |
ad312c7c | 272 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
273 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
274 | "reserved bits\n"); | |
c1a5d4f9 | 275 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
276 | return; |
277 | } | |
278 | ||
279 | } | |
280 | ||
281 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 282 | vcpu->arch.cr0 = cr0; |
a03490ed | 283 | |
a03490ed | 284 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
285 | return; |
286 | } | |
287 | EXPORT_SYMBOL_GPL(set_cr0); | |
288 | ||
289 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
290 | { | |
ad312c7c | 291 | set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
a03490ed CO |
292 | } |
293 | EXPORT_SYMBOL_GPL(lmsw); | |
294 | ||
295 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
296 | { | |
297 | if (cr4 & CR4_RESERVED_BITS) { | |
298 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 299 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
300 | return; |
301 | } | |
302 | ||
303 | if (is_long_mode(vcpu)) { | |
304 | if (!(cr4 & X86_CR4_PAE)) { | |
305 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
306 | "in long mode\n"); | |
c1a5d4f9 | 307 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
308 | return; |
309 | } | |
310 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE) | |
ad312c7c | 311 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 312 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 313 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
314 | return; |
315 | } | |
316 | ||
317 | if (cr4 & X86_CR4_VMXE) { | |
318 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 319 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
320 | return; |
321 | } | |
322 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 323 | vcpu->arch.cr4 = cr4; |
a03490ed | 324 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
325 | } |
326 | EXPORT_SYMBOL_GPL(set_cr4); | |
327 | ||
328 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
329 | { | |
ad312c7c | 330 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
d835dfec AK |
331 | kvm_mmu_flush_tlb(vcpu); |
332 | return; | |
333 | } | |
334 | ||
a03490ed CO |
335 | if (is_long_mode(vcpu)) { |
336 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
337 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 338 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
339 | return; |
340 | } | |
341 | } else { | |
342 | if (is_pae(vcpu)) { | |
343 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
344 | printk(KERN_DEBUG | |
345 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 346 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
347 | return; |
348 | } | |
349 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
350 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
351 | "reserved bits\n"); | |
c1a5d4f9 | 352 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
353 | return; |
354 | } | |
355 | } | |
356 | /* | |
357 | * We don't check reserved bits in nonpae mode, because | |
358 | * this isn't enforced, and VMware depends on this. | |
359 | */ | |
360 | } | |
361 | ||
10589a46 | 362 | down_read(¤t->mm->mmap_sem); |
a03490ed CO |
363 | /* |
364 | * Does the new cr3 value map to physical memory? (Note, we | |
365 | * catch an invalid cr3 even in real-mode, because it would | |
366 | * cause trouble later on when we turn on paging anyway.) | |
367 | * | |
368 | * A real CPU would silently accept an invalid cr3 and would | |
369 | * attempt to use it - with largely undefined (and often hard | |
370 | * to debug) behavior on the guest side. | |
371 | */ | |
372 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 373 | kvm_inject_gp(vcpu, 0); |
a03490ed | 374 | else { |
ad312c7c ZX |
375 | vcpu->arch.cr3 = cr3; |
376 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 377 | } |
10589a46 | 378 | up_read(¤t->mm->mmap_sem); |
a03490ed CO |
379 | } |
380 | EXPORT_SYMBOL_GPL(set_cr3); | |
381 | ||
382 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
383 | { | |
384 | if (cr8 & CR8_RESERVED_BITS) { | |
385 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 386 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
387 | return; |
388 | } | |
389 | if (irqchip_in_kernel(vcpu->kvm)) | |
390 | kvm_lapic_set_tpr(vcpu, cr8); | |
391 | else | |
ad312c7c | 392 | vcpu->arch.cr8 = cr8; |
a03490ed CO |
393 | } |
394 | EXPORT_SYMBOL_GPL(set_cr8); | |
395 | ||
396 | unsigned long get_cr8(struct kvm_vcpu *vcpu) | |
397 | { | |
398 | if (irqchip_in_kernel(vcpu->kvm)) | |
399 | return kvm_lapic_get_cr8(vcpu); | |
400 | else | |
ad312c7c | 401 | return vcpu->arch.cr8; |
a03490ed CO |
402 | } |
403 | EXPORT_SYMBOL_GPL(get_cr8); | |
404 | ||
043405e1 CO |
405 | /* |
406 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
407 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
408 | * | |
409 | * This list is modified at module load time to reflect the | |
410 | * capabilities of the host cpu. | |
411 | */ | |
412 | static u32 msrs_to_save[] = { | |
413 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
414 | MSR_K6_STAR, | |
415 | #ifdef CONFIG_X86_64 | |
416 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
417 | #endif | |
418 | MSR_IA32_TIME_STAMP_COUNTER, | |
419 | }; | |
420 | ||
421 | static unsigned num_msrs_to_save; | |
422 | ||
423 | static u32 emulated_msrs[] = { | |
424 | MSR_IA32_MISC_ENABLE, | |
425 | }; | |
426 | ||
15c4a640 CO |
427 | #ifdef CONFIG_X86_64 |
428 | ||
429 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
430 | { | |
431 | if (efer & EFER_RESERVED_BITS) { | |
432 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
433 | efer); | |
c1a5d4f9 | 434 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
435 | return; |
436 | } | |
437 | ||
438 | if (is_paging(vcpu) | |
ad312c7c | 439 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 440 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 441 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
442 | return; |
443 | } | |
444 | ||
445 | kvm_x86_ops->set_efer(vcpu, efer); | |
446 | ||
447 | efer &= ~EFER_LMA; | |
ad312c7c | 448 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 449 | |
ad312c7c | 450 | vcpu->arch.shadow_efer = efer; |
15c4a640 CO |
451 | } |
452 | ||
453 | #endif | |
454 | ||
455 | /* | |
456 | * Writes msr value into into the appropriate "register". | |
457 | * Returns 0 on success, non-0 otherwise. | |
458 | * Assumes vcpu_load() was already called. | |
459 | */ | |
460 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
461 | { | |
462 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
463 | } | |
464 | ||
313a3dc7 CO |
465 | /* |
466 | * Adapt set_msr() to msr_io()'s calling convention | |
467 | */ | |
468 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
469 | { | |
470 | return kvm_set_msr(vcpu, index, *data); | |
471 | } | |
472 | ||
15c4a640 CO |
473 | |
474 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
475 | { | |
476 | switch (msr) { | |
477 | #ifdef CONFIG_X86_64 | |
478 | case MSR_EFER: | |
479 | set_efer(vcpu, data); | |
480 | break; | |
481 | #endif | |
482 | case MSR_IA32_MC0_STATUS: | |
483 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
484 | __FUNCTION__, data); | |
485 | break; | |
486 | case MSR_IA32_MCG_STATUS: | |
487 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
488 | __FUNCTION__, data); | |
489 | break; | |
c7ac679c JR |
490 | case MSR_IA32_MCG_CTL: |
491 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n", | |
492 | __FUNCTION__, data); | |
493 | break; | |
15c4a640 CO |
494 | case MSR_IA32_UCODE_REV: |
495 | case MSR_IA32_UCODE_WRITE: | |
496 | case 0x200 ... 0x2ff: /* MTRRs */ | |
497 | break; | |
498 | case MSR_IA32_APICBASE: | |
499 | kvm_set_apic_base(vcpu, data); | |
500 | break; | |
501 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 502 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 CO |
503 | break; |
504 | default: | |
565f1fbd | 505 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); |
15c4a640 CO |
506 | return 1; |
507 | } | |
508 | return 0; | |
509 | } | |
510 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
511 | ||
512 | ||
513 | /* | |
514 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
515 | * Returns 0 on success, non-0 otherwise. | |
516 | * Assumes vcpu_load() was already called. | |
517 | */ | |
518 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
519 | { | |
520 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
521 | } | |
522 | ||
523 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
524 | { | |
525 | u64 data; | |
526 | ||
527 | switch (msr) { | |
528 | case 0xc0010010: /* SYSCFG */ | |
529 | case 0xc0010015: /* HWCR */ | |
530 | case MSR_IA32_PLATFORM_ID: | |
531 | case MSR_IA32_P5_MC_ADDR: | |
532 | case MSR_IA32_P5_MC_TYPE: | |
533 | case MSR_IA32_MC0_CTL: | |
534 | case MSR_IA32_MCG_STATUS: | |
535 | case MSR_IA32_MCG_CAP: | |
c7ac679c | 536 | case MSR_IA32_MCG_CTL: |
15c4a640 CO |
537 | case MSR_IA32_MC0_MISC: |
538 | case MSR_IA32_MC0_MISC+4: | |
539 | case MSR_IA32_MC0_MISC+8: | |
540 | case MSR_IA32_MC0_MISC+12: | |
541 | case MSR_IA32_MC0_MISC+16: | |
542 | case MSR_IA32_UCODE_REV: | |
543 | case MSR_IA32_PERF_STATUS: | |
544 | case MSR_IA32_EBL_CR_POWERON: | |
545 | /* MTRR registers */ | |
546 | case 0xfe: | |
547 | case 0x200 ... 0x2ff: | |
548 | data = 0; | |
549 | break; | |
550 | case 0xcd: /* fsb frequency */ | |
551 | data = 3; | |
552 | break; | |
553 | case MSR_IA32_APICBASE: | |
554 | data = kvm_get_apic_base(vcpu); | |
555 | break; | |
556 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 557 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 CO |
558 | break; |
559 | #ifdef CONFIG_X86_64 | |
560 | case MSR_EFER: | |
ad312c7c | 561 | data = vcpu->arch.shadow_efer; |
15c4a640 CO |
562 | break; |
563 | #endif | |
564 | default: | |
565 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
566 | return 1; | |
567 | } | |
568 | *pdata = data; | |
569 | return 0; | |
570 | } | |
571 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
572 | ||
313a3dc7 CO |
573 | /* |
574 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
575 | * | |
576 | * @return number of msrs set successfully. | |
577 | */ | |
578 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
579 | struct kvm_msr_entry *entries, | |
580 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
581 | unsigned index, u64 *data)) | |
582 | { | |
583 | int i; | |
584 | ||
585 | vcpu_load(vcpu); | |
586 | ||
587 | for (i = 0; i < msrs->nmsrs; ++i) | |
588 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
589 | break; | |
590 | ||
591 | vcpu_put(vcpu); | |
592 | ||
593 | return i; | |
594 | } | |
595 | ||
596 | /* | |
597 | * Read or write a bunch of msrs. Parameters are user addresses. | |
598 | * | |
599 | * @return number of msrs set successfully. | |
600 | */ | |
601 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
602 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
603 | unsigned index, u64 *data), | |
604 | int writeback) | |
605 | { | |
606 | struct kvm_msrs msrs; | |
607 | struct kvm_msr_entry *entries; | |
608 | int r, n; | |
609 | unsigned size; | |
610 | ||
611 | r = -EFAULT; | |
612 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
613 | goto out; | |
614 | ||
615 | r = -E2BIG; | |
616 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
617 | goto out; | |
618 | ||
619 | r = -ENOMEM; | |
620 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
621 | entries = vmalloc(size); | |
622 | if (!entries) | |
623 | goto out; | |
624 | ||
625 | r = -EFAULT; | |
626 | if (copy_from_user(entries, user_msrs->entries, size)) | |
627 | goto out_free; | |
628 | ||
629 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
630 | if (r < 0) | |
631 | goto out_free; | |
632 | ||
633 | r = -EFAULT; | |
634 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
635 | goto out_free; | |
636 | ||
637 | r = n; | |
638 | ||
639 | out_free: | |
640 | vfree(entries); | |
641 | out: | |
642 | return r; | |
643 | } | |
644 | ||
e9b11c17 ZX |
645 | /* |
646 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
647 | * cached on it. | |
648 | */ | |
649 | void decache_vcpus_on_cpu(int cpu) | |
650 | { | |
651 | struct kvm *vm; | |
652 | struct kvm_vcpu *vcpu; | |
653 | int i; | |
654 | ||
655 | spin_lock(&kvm_lock); | |
656 | list_for_each_entry(vm, &vm_list, vm_list) | |
657 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
658 | vcpu = vm->vcpus[i]; | |
659 | if (!vcpu) | |
660 | continue; | |
661 | /* | |
662 | * If the vcpu is locked, then it is running on some | |
663 | * other cpu and therefore it is not cached on the | |
664 | * cpu in question. | |
665 | * | |
666 | * If it's not locked, check the last cpu it executed | |
667 | * on. | |
668 | */ | |
669 | if (mutex_trylock(&vcpu->mutex)) { | |
670 | if (vcpu->cpu == cpu) { | |
671 | kvm_x86_ops->vcpu_decache(vcpu); | |
672 | vcpu->cpu = -1; | |
673 | } | |
674 | mutex_unlock(&vcpu->mutex); | |
675 | } | |
676 | } | |
677 | spin_unlock(&kvm_lock); | |
678 | } | |
679 | ||
018d00d2 ZX |
680 | int kvm_dev_ioctl_check_extension(long ext) |
681 | { | |
682 | int r; | |
683 | ||
684 | switch (ext) { | |
685 | case KVM_CAP_IRQCHIP: | |
686 | case KVM_CAP_HLT: | |
687 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
688 | case KVM_CAP_USER_MEMORY: | |
689 | case KVM_CAP_SET_TSS_ADDR: | |
07716717 | 690 | case KVM_CAP_EXT_CPUID: |
018d00d2 ZX |
691 | r = 1; |
692 | break; | |
774ead3a AK |
693 | case KVM_CAP_VAPIC: |
694 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
695 | break; | |
018d00d2 ZX |
696 | default: |
697 | r = 0; | |
698 | break; | |
699 | } | |
700 | return r; | |
701 | ||
702 | } | |
703 | ||
043405e1 CO |
704 | long kvm_arch_dev_ioctl(struct file *filp, |
705 | unsigned int ioctl, unsigned long arg) | |
706 | { | |
707 | void __user *argp = (void __user *)arg; | |
708 | long r; | |
709 | ||
710 | switch (ioctl) { | |
711 | case KVM_GET_MSR_INDEX_LIST: { | |
712 | struct kvm_msr_list __user *user_msr_list = argp; | |
713 | struct kvm_msr_list msr_list; | |
714 | unsigned n; | |
715 | ||
716 | r = -EFAULT; | |
717 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
718 | goto out; | |
719 | n = msr_list.nmsrs; | |
720 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
721 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
722 | goto out; | |
723 | r = -E2BIG; | |
724 | if (n < num_msrs_to_save) | |
725 | goto out; | |
726 | r = -EFAULT; | |
727 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
728 | num_msrs_to_save * sizeof(u32))) | |
729 | goto out; | |
730 | if (copy_to_user(user_msr_list->indices | |
731 | + num_msrs_to_save * sizeof(u32), | |
732 | &emulated_msrs, | |
733 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
734 | goto out; | |
735 | r = 0; | |
736 | break; | |
737 | } | |
674eea0f AK |
738 | case KVM_GET_SUPPORTED_CPUID: { |
739 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
740 | struct kvm_cpuid2 cpuid; | |
741 | ||
742 | r = -EFAULT; | |
743 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
744 | goto out; | |
745 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
746 | cpuid_arg->entries); | |
747 | if (r) | |
748 | goto out; | |
749 | ||
750 | r = -EFAULT; | |
751 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
752 | goto out; | |
753 | r = 0; | |
754 | break; | |
755 | } | |
043405e1 CO |
756 | default: |
757 | r = -EINVAL; | |
758 | } | |
759 | out: | |
760 | return r; | |
761 | } | |
762 | ||
313a3dc7 CO |
763 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
764 | { | |
765 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
766 | } | |
767 | ||
768 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
769 | { | |
770 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 771 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
772 | } |
773 | ||
07716717 | 774 | static int is_efer_nx(void) |
313a3dc7 CO |
775 | { |
776 | u64 efer; | |
313a3dc7 CO |
777 | |
778 | rdmsrl(MSR_EFER, efer); | |
07716717 DK |
779 | return efer & EFER_NX; |
780 | } | |
781 | ||
782 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
783 | { | |
784 | int i; | |
785 | struct kvm_cpuid_entry2 *e, *entry; | |
786 | ||
313a3dc7 | 787 | entry = NULL; |
ad312c7c ZX |
788 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
789 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
790 | if (e->function == 0x80000001) { |
791 | entry = e; | |
792 | break; | |
793 | } | |
794 | } | |
07716717 | 795 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
796 | entry->edx &= ~(1 << 20); |
797 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
798 | } | |
799 | } | |
800 | ||
07716717 | 801 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
802 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
803 | struct kvm_cpuid *cpuid, | |
804 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
805 | { |
806 | int r, i; | |
807 | struct kvm_cpuid_entry *cpuid_entries; | |
808 | ||
809 | r = -E2BIG; | |
810 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
811 | goto out; | |
812 | r = -ENOMEM; | |
813 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
814 | if (!cpuid_entries) | |
815 | goto out; | |
816 | r = -EFAULT; | |
817 | if (copy_from_user(cpuid_entries, entries, | |
818 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
819 | goto out_free; | |
820 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
821 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
822 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
823 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
824 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
825 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
826 | vcpu->arch.cpuid_entries[i].index = 0; | |
827 | vcpu->arch.cpuid_entries[i].flags = 0; | |
828 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
829 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
830 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
831 | } | |
832 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
833 | cpuid_fix_nx_cap(vcpu); |
834 | r = 0; | |
835 | ||
836 | out_free: | |
837 | vfree(cpuid_entries); | |
838 | out: | |
839 | return r; | |
840 | } | |
841 | ||
842 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
843 | struct kvm_cpuid2 *cpuid, | |
844 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
845 | { |
846 | int r; | |
847 | ||
848 | r = -E2BIG; | |
849 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
850 | goto out; | |
851 | r = -EFAULT; | |
ad312c7c | 852 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 853 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 854 | goto out; |
ad312c7c | 855 | vcpu->arch.cpuid_nent = cpuid->nent; |
313a3dc7 CO |
856 | return 0; |
857 | ||
858 | out: | |
859 | return r; | |
860 | } | |
861 | ||
07716717 DK |
862 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
863 | struct kvm_cpuid2 *cpuid, | |
864 | struct kvm_cpuid_entry2 __user *entries) | |
865 | { | |
866 | int r; | |
867 | ||
868 | r = -E2BIG; | |
ad312c7c | 869 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
870 | goto out; |
871 | r = -EFAULT; | |
ad312c7c ZX |
872 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
873 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) | |
07716717 DK |
874 | goto out; |
875 | return 0; | |
876 | ||
877 | out: | |
ad312c7c | 878 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
879 | return r; |
880 | } | |
881 | ||
882 | static inline u32 bit(int bitno) | |
883 | { | |
884 | return 1 << (bitno & 31); | |
885 | } | |
886 | ||
887 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
888 | u32 index) | |
889 | { | |
890 | entry->function = function; | |
891 | entry->index = index; | |
892 | cpuid_count(entry->function, entry->index, | |
893 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); | |
894 | entry->flags = 0; | |
895 | } | |
896 | ||
897 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
898 | u32 index, int *nent, int maxnent) | |
899 | { | |
900 | const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) | | |
901 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
902 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
903 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
904 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
905 | bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) | | |
906 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
907 | bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) | | |
908 | bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) | | |
909 | bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP); | |
910 | const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) | | |
911 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
912 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
913 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
914 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
915 | bit(X86_FEATURE_PGE) | | |
916 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
917 | bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) | | |
918 | bit(X86_FEATURE_SYSCALL) | | |
919 | (bit(X86_FEATURE_NX) && is_efer_nx()) | | |
920 | #ifdef CONFIG_X86_64 | |
921 | bit(X86_FEATURE_LM) | | |
922 | #endif | |
923 | bit(X86_FEATURE_MMXEXT) | | |
924 | bit(X86_FEATURE_3DNOWEXT) | | |
925 | bit(X86_FEATURE_3DNOW); | |
926 | const u32 kvm_supported_word3_x86_features = | |
927 | bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16); | |
928 | const u32 kvm_supported_word6_x86_features = | |
929 | bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY); | |
930 | ||
931 | /* all func 2 cpuid_count() should be called on the same cpu */ | |
932 | get_cpu(); | |
933 | do_cpuid_1_ent(entry, function, index); | |
934 | ++*nent; | |
935 | ||
936 | switch (function) { | |
937 | case 0: | |
938 | entry->eax = min(entry->eax, (u32)0xb); | |
939 | break; | |
940 | case 1: | |
941 | entry->edx &= kvm_supported_word0_x86_features; | |
942 | entry->ecx &= kvm_supported_word3_x86_features; | |
943 | break; | |
944 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
945 | * may return different values. This forces us to get_cpu() before | |
946 | * issuing the first command, and also to emulate this annoying behavior | |
947 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
948 | case 2: { | |
949 | int t, times = entry->eax & 0xff; | |
950 | ||
951 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
952 | for (t = 1; t < times && *nent < maxnent; ++t) { | |
953 | do_cpuid_1_ent(&entry[t], function, 0); | |
954 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
955 | ++*nent; | |
956 | } | |
957 | break; | |
958 | } | |
959 | /* function 4 and 0xb have additional index. */ | |
960 | case 4: { | |
961 | int index, cache_type; | |
962 | ||
963 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
964 | /* read more entries until cache_type is zero */ | |
965 | for (index = 1; *nent < maxnent; ++index) { | |
966 | cache_type = entry[index - 1].eax & 0x1f; | |
967 | if (!cache_type) | |
968 | break; | |
969 | do_cpuid_1_ent(&entry[index], function, index); | |
970 | entry[index].flags |= | |
971 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
972 | ++*nent; | |
973 | } | |
974 | break; | |
975 | } | |
976 | case 0xb: { | |
977 | int index, level_type; | |
978 | ||
979 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
980 | /* read more entries until level_type is zero */ | |
981 | for (index = 1; *nent < maxnent; ++index) { | |
982 | level_type = entry[index - 1].ecx & 0xff; | |
983 | if (!level_type) | |
984 | break; | |
985 | do_cpuid_1_ent(&entry[index], function, index); | |
986 | entry[index].flags |= | |
987 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
988 | ++*nent; | |
989 | } | |
990 | break; | |
991 | } | |
992 | case 0x80000000: | |
993 | entry->eax = min(entry->eax, 0x8000001a); | |
994 | break; | |
995 | case 0x80000001: | |
996 | entry->edx &= kvm_supported_word1_x86_features; | |
997 | entry->ecx &= kvm_supported_word6_x86_features; | |
998 | break; | |
999 | } | |
1000 | put_cpu(); | |
1001 | } | |
1002 | ||
674eea0f | 1003 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
07716717 DK |
1004 | struct kvm_cpuid_entry2 __user *entries) |
1005 | { | |
1006 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1007 | int limit, nent = 0, r = -E2BIG; | |
1008 | u32 func; | |
1009 | ||
1010 | if (cpuid->nent < 1) | |
1011 | goto out; | |
1012 | r = -ENOMEM; | |
1013 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1014 | if (!cpuid_entries) | |
1015 | goto out; | |
1016 | ||
1017 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1018 | limit = cpuid_entries[0].eax; | |
1019 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1020 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
1021 | &nent, cpuid->nent); | |
1022 | r = -E2BIG; | |
1023 | if (nent >= cpuid->nent) | |
1024 | goto out_free; | |
1025 | ||
1026 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1027 | limit = cpuid_entries[nent - 1].eax; | |
1028 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1029 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
1030 | &nent, cpuid->nent); | |
1031 | r = -EFAULT; | |
1032 | if (copy_to_user(entries, cpuid_entries, | |
1033 | nent * sizeof(struct kvm_cpuid_entry2))) | |
1034 | goto out_free; | |
1035 | cpuid->nent = nent; | |
1036 | r = 0; | |
1037 | ||
1038 | out_free: | |
1039 | vfree(cpuid_entries); | |
1040 | out: | |
1041 | return r; | |
1042 | } | |
1043 | ||
313a3dc7 CO |
1044 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1045 | struct kvm_lapic_state *s) | |
1046 | { | |
1047 | vcpu_load(vcpu); | |
ad312c7c | 1048 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1049 | vcpu_put(vcpu); |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1055 | struct kvm_lapic_state *s) | |
1056 | { | |
1057 | vcpu_load(vcpu); | |
ad312c7c | 1058 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 CO |
1059 | kvm_apic_post_state_restore(vcpu); |
1060 | vcpu_put(vcpu); | |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
f77bc6a4 ZX |
1065 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1066 | struct kvm_interrupt *irq) | |
1067 | { | |
1068 | if (irq->irq < 0 || irq->irq >= 256) | |
1069 | return -EINVAL; | |
1070 | if (irqchip_in_kernel(vcpu->kvm)) | |
1071 | return -ENXIO; | |
1072 | vcpu_load(vcpu); | |
1073 | ||
ad312c7c ZX |
1074 | set_bit(irq->irq, vcpu->arch.irq_pending); |
1075 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary); | |
f77bc6a4 ZX |
1076 | |
1077 | vcpu_put(vcpu); | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
b209749f AK |
1082 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1083 | struct kvm_tpr_access_ctl *tac) | |
1084 | { | |
1085 | if (tac->flags) | |
1086 | return -EINVAL; | |
1087 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1088 | return 0; | |
1089 | } | |
1090 | ||
313a3dc7 CO |
1091 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1092 | unsigned int ioctl, unsigned long arg) | |
1093 | { | |
1094 | struct kvm_vcpu *vcpu = filp->private_data; | |
1095 | void __user *argp = (void __user *)arg; | |
1096 | int r; | |
1097 | ||
1098 | switch (ioctl) { | |
1099 | case KVM_GET_LAPIC: { | |
1100 | struct kvm_lapic_state lapic; | |
1101 | ||
1102 | memset(&lapic, 0, sizeof lapic); | |
1103 | r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic); | |
1104 | if (r) | |
1105 | goto out; | |
1106 | r = -EFAULT; | |
1107 | if (copy_to_user(argp, &lapic, sizeof lapic)) | |
1108 | goto out; | |
1109 | r = 0; | |
1110 | break; | |
1111 | } | |
1112 | case KVM_SET_LAPIC: { | |
1113 | struct kvm_lapic_state lapic; | |
1114 | ||
1115 | r = -EFAULT; | |
1116 | if (copy_from_user(&lapic, argp, sizeof lapic)) | |
1117 | goto out; | |
1118 | r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);; | |
1119 | if (r) | |
1120 | goto out; | |
1121 | r = 0; | |
1122 | break; | |
1123 | } | |
f77bc6a4 ZX |
1124 | case KVM_INTERRUPT: { |
1125 | struct kvm_interrupt irq; | |
1126 | ||
1127 | r = -EFAULT; | |
1128 | if (copy_from_user(&irq, argp, sizeof irq)) | |
1129 | goto out; | |
1130 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
1131 | if (r) | |
1132 | goto out; | |
1133 | r = 0; | |
1134 | break; | |
1135 | } | |
313a3dc7 CO |
1136 | case KVM_SET_CPUID: { |
1137 | struct kvm_cpuid __user *cpuid_arg = argp; | |
1138 | struct kvm_cpuid cpuid; | |
1139 | ||
1140 | r = -EFAULT; | |
1141 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1142 | goto out; | |
1143 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
1144 | if (r) | |
1145 | goto out; | |
1146 | break; | |
1147 | } | |
07716717 DK |
1148 | case KVM_SET_CPUID2: { |
1149 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1150 | struct kvm_cpuid2 cpuid; | |
1151 | ||
1152 | r = -EFAULT; | |
1153 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1154 | goto out; | |
1155 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
1156 | cpuid_arg->entries); | |
1157 | if (r) | |
1158 | goto out; | |
1159 | break; | |
1160 | } | |
1161 | case KVM_GET_CPUID2: { | |
1162 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1163 | struct kvm_cpuid2 cpuid; | |
1164 | ||
1165 | r = -EFAULT; | |
1166 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1167 | goto out; | |
1168 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
1169 | cpuid_arg->entries); | |
1170 | if (r) | |
1171 | goto out; | |
1172 | r = -EFAULT; | |
1173 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1174 | goto out; | |
1175 | r = 0; | |
1176 | break; | |
1177 | } | |
313a3dc7 CO |
1178 | case KVM_GET_MSRS: |
1179 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
1180 | break; | |
1181 | case KVM_SET_MSRS: | |
1182 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
1183 | break; | |
b209749f AK |
1184 | case KVM_TPR_ACCESS_REPORTING: { |
1185 | struct kvm_tpr_access_ctl tac; | |
1186 | ||
1187 | r = -EFAULT; | |
1188 | if (copy_from_user(&tac, argp, sizeof tac)) | |
1189 | goto out; | |
1190 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
1191 | if (r) | |
1192 | goto out; | |
1193 | r = -EFAULT; | |
1194 | if (copy_to_user(argp, &tac, sizeof tac)) | |
1195 | goto out; | |
1196 | r = 0; | |
1197 | break; | |
1198 | }; | |
b93463aa AK |
1199 | case KVM_SET_VAPIC_ADDR: { |
1200 | struct kvm_vapic_addr va; | |
1201 | ||
1202 | r = -EINVAL; | |
1203 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1204 | goto out; | |
1205 | r = -EFAULT; | |
1206 | if (copy_from_user(&va, argp, sizeof va)) | |
1207 | goto out; | |
1208 | r = 0; | |
1209 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
1210 | break; | |
1211 | } | |
313a3dc7 CO |
1212 | default: |
1213 | r = -EINVAL; | |
1214 | } | |
1215 | out: | |
1216 | return r; | |
1217 | } | |
1218 | ||
1fe779f8 CO |
1219 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
1220 | { | |
1221 | int ret; | |
1222 | ||
1223 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
1224 | return -1; | |
1225 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, | |
1230 | u32 kvm_nr_mmu_pages) | |
1231 | { | |
1232 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
1233 | return -EINVAL; | |
1234 | ||
10589a46 | 1235 | down_write(¤t->mm->mmap_sem); |
1fe779f8 CO |
1236 | |
1237 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 1238 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 1239 | |
10589a46 | 1240 | up_write(¤t->mm->mmap_sem); |
1fe779f8 CO |
1241 | return 0; |
1242 | } | |
1243 | ||
1244 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
1245 | { | |
f05e70ac | 1246 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
1247 | } |
1248 | ||
e9f85cde ZX |
1249 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1250 | { | |
1251 | int i; | |
1252 | struct kvm_mem_alias *alias; | |
1253 | ||
d69fb81f ZX |
1254 | for (i = 0; i < kvm->arch.naliases; ++i) { |
1255 | alias = &kvm->arch.aliases[i]; | |
e9f85cde ZX |
1256 | if (gfn >= alias->base_gfn |
1257 | && gfn < alias->base_gfn + alias->npages) | |
1258 | return alias->target_gfn + gfn - alias->base_gfn; | |
1259 | } | |
1260 | return gfn; | |
1261 | } | |
1262 | ||
1fe779f8 CO |
1263 | /* |
1264 | * Set a new alias region. Aliases map a portion of physical memory into | |
1265 | * another portion. This is useful for memory windows, for example the PC | |
1266 | * VGA region. | |
1267 | */ | |
1268 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
1269 | struct kvm_memory_alias *alias) | |
1270 | { | |
1271 | int r, n; | |
1272 | struct kvm_mem_alias *p; | |
1273 | ||
1274 | r = -EINVAL; | |
1275 | /* General sanity checks */ | |
1276 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
1277 | goto out; | |
1278 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
1279 | goto out; | |
1280 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
1281 | goto out; | |
1282 | if (alias->guest_phys_addr + alias->memory_size | |
1283 | < alias->guest_phys_addr) | |
1284 | goto out; | |
1285 | if (alias->target_phys_addr + alias->memory_size | |
1286 | < alias->target_phys_addr) | |
1287 | goto out; | |
1288 | ||
10589a46 | 1289 | down_write(¤t->mm->mmap_sem); |
1fe779f8 | 1290 | |
d69fb81f | 1291 | p = &kvm->arch.aliases[alias->slot]; |
1fe779f8 CO |
1292 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
1293 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
1294 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
1295 | ||
1296 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
d69fb81f | 1297 | if (kvm->arch.aliases[n - 1].npages) |
1fe779f8 | 1298 | break; |
d69fb81f | 1299 | kvm->arch.naliases = n; |
1fe779f8 CO |
1300 | |
1301 | kvm_mmu_zap_all(kvm); | |
1302 | ||
10589a46 | 1303 | up_write(¤t->mm->mmap_sem); |
1fe779f8 CO |
1304 | |
1305 | return 0; | |
1306 | ||
1307 | out: | |
1308 | return r; | |
1309 | } | |
1310 | ||
1311 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1312 | { | |
1313 | int r; | |
1314 | ||
1315 | r = 0; | |
1316 | switch (chip->chip_id) { | |
1317 | case KVM_IRQCHIP_PIC_MASTER: | |
1318 | memcpy(&chip->chip.pic, | |
1319 | &pic_irqchip(kvm)->pics[0], | |
1320 | sizeof(struct kvm_pic_state)); | |
1321 | break; | |
1322 | case KVM_IRQCHIP_PIC_SLAVE: | |
1323 | memcpy(&chip->chip.pic, | |
1324 | &pic_irqchip(kvm)->pics[1], | |
1325 | sizeof(struct kvm_pic_state)); | |
1326 | break; | |
1327 | case KVM_IRQCHIP_IOAPIC: | |
1328 | memcpy(&chip->chip.ioapic, | |
1329 | ioapic_irqchip(kvm), | |
1330 | sizeof(struct kvm_ioapic_state)); | |
1331 | break; | |
1332 | default: | |
1333 | r = -EINVAL; | |
1334 | break; | |
1335 | } | |
1336 | return r; | |
1337 | } | |
1338 | ||
1339 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1340 | { | |
1341 | int r; | |
1342 | ||
1343 | r = 0; | |
1344 | switch (chip->chip_id) { | |
1345 | case KVM_IRQCHIP_PIC_MASTER: | |
1346 | memcpy(&pic_irqchip(kvm)->pics[0], | |
1347 | &chip->chip.pic, | |
1348 | sizeof(struct kvm_pic_state)); | |
1349 | break; | |
1350 | case KVM_IRQCHIP_PIC_SLAVE: | |
1351 | memcpy(&pic_irqchip(kvm)->pics[1], | |
1352 | &chip->chip.pic, | |
1353 | sizeof(struct kvm_pic_state)); | |
1354 | break; | |
1355 | case KVM_IRQCHIP_IOAPIC: | |
1356 | memcpy(ioapic_irqchip(kvm), | |
1357 | &chip->chip.ioapic, | |
1358 | sizeof(struct kvm_ioapic_state)); | |
1359 | break; | |
1360 | default: | |
1361 | r = -EINVAL; | |
1362 | break; | |
1363 | } | |
1364 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
1365 | return r; | |
1366 | } | |
1367 | ||
5bb064dc ZX |
1368 | /* |
1369 | * Get (and clear) the dirty memory log for a memory slot. | |
1370 | */ | |
1371 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
1372 | struct kvm_dirty_log *log) | |
1373 | { | |
1374 | int r; | |
1375 | int n; | |
1376 | struct kvm_memory_slot *memslot; | |
1377 | int is_dirty = 0; | |
1378 | ||
10589a46 | 1379 | down_write(¤t->mm->mmap_sem); |
5bb064dc ZX |
1380 | |
1381 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
1382 | if (r) | |
1383 | goto out; | |
1384 | ||
1385 | /* If nothing is dirty, don't bother messing with page tables. */ | |
1386 | if (is_dirty) { | |
1387 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
1388 | kvm_flush_remote_tlbs(kvm); | |
1389 | memslot = &kvm->memslots[log->slot]; | |
1390 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
1391 | memset(memslot->dirty_bitmap, 0, n); | |
1392 | } | |
1393 | r = 0; | |
1394 | out: | |
10589a46 | 1395 | up_write(¤t->mm->mmap_sem); |
5bb064dc ZX |
1396 | return r; |
1397 | } | |
1398 | ||
1fe779f8 CO |
1399 | long kvm_arch_vm_ioctl(struct file *filp, |
1400 | unsigned int ioctl, unsigned long arg) | |
1401 | { | |
1402 | struct kvm *kvm = filp->private_data; | |
1403 | void __user *argp = (void __user *)arg; | |
1404 | int r = -EINVAL; | |
1405 | ||
1406 | switch (ioctl) { | |
1407 | case KVM_SET_TSS_ADDR: | |
1408 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1409 | if (r < 0) | |
1410 | goto out; | |
1411 | break; | |
1412 | case KVM_SET_MEMORY_REGION: { | |
1413 | struct kvm_memory_region kvm_mem; | |
1414 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1415 | ||
1416 | r = -EFAULT; | |
1417 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
1418 | goto out; | |
1419 | kvm_userspace_mem.slot = kvm_mem.slot; | |
1420 | kvm_userspace_mem.flags = kvm_mem.flags; | |
1421 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
1422 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
1423 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1424 | if (r) | |
1425 | goto out; | |
1426 | break; | |
1427 | } | |
1428 | case KVM_SET_NR_MMU_PAGES: | |
1429 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1430 | if (r) | |
1431 | goto out; | |
1432 | break; | |
1433 | case KVM_GET_NR_MMU_PAGES: | |
1434 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
1435 | break; | |
1436 | case KVM_SET_MEMORY_ALIAS: { | |
1437 | struct kvm_memory_alias alias; | |
1438 | ||
1439 | r = -EFAULT; | |
1440 | if (copy_from_user(&alias, argp, sizeof alias)) | |
1441 | goto out; | |
1442 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
1443 | if (r) | |
1444 | goto out; | |
1445 | break; | |
1446 | } | |
1447 | case KVM_CREATE_IRQCHIP: | |
1448 | r = -ENOMEM; | |
d7deeeb0 ZX |
1449 | kvm->arch.vpic = kvm_create_pic(kvm); |
1450 | if (kvm->arch.vpic) { | |
1fe779f8 CO |
1451 | r = kvm_ioapic_init(kvm); |
1452 | if (r) { | |
d7deeeb0 ZX |
1453 | kfree(kvm->arch.vpic); |
1454 | kvm->arch.vpic = NULL; | |
1fe779f8 CO |
1455 | goto out; |
1456 | } | |
1457 | } else | |
1458 | goto out; | |
1459 | break; | |
1460 | case KVM_IRQ_LINE: { | |
1461 | struct kvm_irq_level irq_event; | |
1462 | ||
1463 | r = -EFAULT; | |
1464 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
1465 | goto out; | |
1466 | if (irqchip_in_kernel(kvm)) { | |
1467 | mutex_lock(&kvm->lock); | |
1468 | if (irq_event.irq < 16) | |
1469 | kvm_pic_set_irq(pic_irqchip(kvm), | |
1470 | irq_event.irq, | |
1471 | irq_event.level); | |
d7deeeb0 | 1472 | kvm_ioapic_set_irq(kvm->arch.vioapic, |
1fe779f8 CO |
1473 | irq_event.irq, |
1474 | irq_event.level); | |
1475 | mutex_unlock(&kvm->lock); | |
1476 | r = 0; | |
1477 | } | |
1478 | break; | |
1479 | } | |
1480 | case KVM_GET_IRQCHIP: { | |
1481 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
1482 | struct kvm_irqchip chip; | |
1483 | ||
1484 | r = -EFAULT; | |
1485 | if (copy_from_user(&chip, argp, sizeof chip)) | |
1486 | goto out; | |
1487 | r = -ENXIO; | |
1488 | if (!irqchip_in_kernel(kvm)) | |
1489 | goto out; | |
1490 | r = kvm_vm_ioctl_get_irqchip(kvm, &chip); | |
1491 | if (r) | |
1492 | goto out; | |
1493 | r = -EFAULT; | |
1494 | if (copy_to_user(argp, &chip, sizeof chip)) | |
1495 | goto out; | |
1496 | r = 0; | |
1497 | break; | |
1498 | } | |
1499 | case KVM_SET_IRQCHIP: { | |
1500 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
1501 | struct kvm_irqchip chip; | |
1502 | ||
1503 | r = -EFAULT; | |
1504 | if (copy_from_user(&chip, argp, sizeof chip)) | |
1505 | goto out; | |
1506 | r = -ENXIO; | |
1507 | if (!irqchip_in_kernel(kvm)) | |
1508 | goto out; | |
1509 | r = kvm_vm_ioctl_set_irqchip(kvm, &chip); | |
1510 | if (r) | |
1511 | goto out; | |
1512 | r = 0; | |
1513 | break; | |
1514 | } | |
1515 | default: | |
1516 | ; | |
1517 | } | |
1518 | out: | |
1519 | return r; | |
1520 | } | |
1521 | ||
a16b043c | 1522 | static void kvm_init_msr_list(void) |
043405e1 CO |
1523 | { |
1524 | u32 dummy[2]; | |
1525 | unsigned i, j; | |
1526 | ||
1527 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
1528 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
1529 | continue; | |
1530 | if (j < i) | |
1531 | msrs_to_save[j] = msrs_to_save[i]; | |
1532 | j++; | |
1533 | } | |
1534 | num_msrs_to_save = j; | |
1535 | } | |
1536 | ||
bbd9b64e CO |
1537 | /* |
1538 | * Only apic need an MMIO device hook, so shortcut now.. | |
1539 | */ | |
1540 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, | |
1541 | gpa_t addr) | |
1542 | { | |
1543 | struct kvm_io_device *dev; | |
1544 | ||
ad312c7c ZX |
1545 | if (vcpu->arch.apic) { |
1546 | dev = &vcpu->arch.apic->dev; | |
bbd9b64e CO |
1547 | if (dev->in_range(dev, addr)) |
1548 | return dev; | |
1549 | } | |
1550 | return NULL; | |
1551 | } | |
1552 | ||
1553 | ||
1554 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, | |
1555 | gpa_t addr) | |
1556 | { | |
1557 | struct kvm_io_device *dev; | |
1558 | ||
1559 | dev = vcpu_find_pervcpu_dev(vcpu, addr); | |
1560 | if (dev == NULL) | |
1561 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
1562 | return dev; | |
1563 | } | |
1564 | ||
1565 | int emulator_read_std(unsigned long addr, | |
1566 | void *val, | |
1567 | unsigned int bytes, | |
1568 | struct kvm_vcpu *vcpu) | |
1569 | { | |
1570 | void *data = val; | |
10589a46 | 1571 | int r = X86EMUL_CONTINUE; |
bbd9b64e | 1572 | |
10589a46 | 1573 | down_read(¤t->mm->mmap_sem); |
bbd9b64e | 1574 | while (bytes) { |
ad312c7c | 1575 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
1576 | unsigned offset = addr & (PAGE_SIZE-1); |
1577 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1578 | int ret; | |
1579 | ||
10589a46 MT |
1580 | if (gpa == UNMAPPED_GVA) { |
1581 | r = X86EMUL_PROPAGATE_FAULT; | |
1582 | goto out; | |
1583 | } | |
bbd9b64e | 1584 | ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy); |
10589a46 MT |
1585 | if (ret < 0) { |
1586 | r = X86EMUL_UNHANDLEABLE; | |
1587 | goto out; | |
1588 | } | |
bbd9b64e CO |
1589 | |
1590 | bytes -= tocopy; | |
1591 | data += tocopy; | |
1592 | addr += tocopy; | |
1593 | } | |
10589a46 MT |
1594 | out: |
1595 | up_read(¤t->mm->mmap_sem); | |
1596 | return r; | |
bbd9b64e CO |
1597 | } |
1598 | EXPORT_SYMBOL_GPL(emulator_read_std); | |
1599 | ||
bbd9b64e CO |
1600 | static int emulator_read_emulated(unsigned long addr, |
1601 | void *val, | |
1602 | unsigned int bytes, | |
1603 | struct kvm_vcpu *vcpu) | |
1604 | { | |
1605 | struct kvm_io_device *mmio_dev; | |
1606 | gpa_t gpa; | |
1607 | ||
1608 | if (vcpu->mmio_read_completed) { | |
1609 | memcpy(val, vcpu->mmio_data, bytes); | |
1610 | vcpu->mmio_read_completed = 0; | |
1611 | return X86EMUL_CONTINUE; | |
1612 | } | |
1613 | ||
10589a46 | 1614 | down_read(¤t->mm->mmap_sem); |
ad312c7c | 1615 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
10589a46 | 1616 | up_read(¤t->mm->mmap_sem); |
bbd9b64e CO |
1617 | |
1618 | /* For APIC access vmexit */ | |
1619 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
1620 | goto mmio; | |
1621 | ||
1622 | if (emulator_read_std(addr, val, bytes, vcpu) | |
1623 | == X86EMUL_CONTINUE) | |
1624 | return X86EMUL_CONTINUE; | |
1625 | if (gpa == UNMAPPED_GVA) | |
1626 | return X86EMUL_PROPAGATE_FAULT; | |
1627 | ||
1628 | mmio: | |
1629 | /* | |
1630 | * Is this MMIO handled locally? | |
1631 | */ | |
10589a46 | 1632 | mutex_lock(&vcpu->kvm->lock); |
bbd9b64e CO |
1633 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); |
1634 | if (mmio_dev) { | |
1635 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
10589a46 | 1636 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
1637 | return X86EMUL_CONTINUE; |
1638 | } | |
10589a46 | 1639 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
1640 | |
1641 | vcpu->mmio_needed = 1; | |
1642 | vcpu->mmio_phys_addr = gpa; | |
1643 | vcpu->mmio_size = bytes; | |
1644 | vcpu->mmio_is_write = 0; | |
1645 | ||
1646 | return X86EMUL_UNHANDLEABLE; | |
1647 | } | |
1648 | ||
1649 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, | |
1650 | const void *val, int bytes) | |
1651 | { | |
1652 | int ret; | |
1653 | ||
10589a46 | 1654 | down_read(¤t->mm->mmap_sem); |
bbd9b64e | 1655 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); |
10589a46 MT |
1656 | if (ret < 0) { |
1657 | up_read(¤t->mm->mmap_sem); | |
bbd9b64e | 1658 | return 0; |
10589a46 | 1659 | } |
bbd9b64e | 1660 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
10589a46 | 1661 | up_read(¤t->mm->mmap_sem); |
bbd9b64e CO |
1662 | return 1; |
1663 | } | |
1664 | ||
1665 | static int emulator_write_emulated_onepage(unsigned long addr, | |
1666 | const void *val, | |
1667 | unsigned int bytes, | |
1668 | struct kvm_vcpu *vcpu) | |
1669 | { | |
1670 | struct kvm_io_device *mmio_dev; | |
10589a46 MT |
1671 | gpa_t gpa; |
1672 | ||
1673 | down_read(¤t->mm->mmap_sem); | |
1674 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); | |
1675 | up_read(¤t->mm->mmap_sem); | |
bbd9b64e CO |
1676 | |
1677 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 1678 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
1679 | return X86EMUL_PROPAGATE_FAULT; |
1680 | } | |
1681 | ||
1682 | /* For APIC access vmexit */ | |
1683 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
1684 | goto mmio; | |
1685 | ||
1686 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
1687 | return X86EMUL_CONTINUE; | |
1688 | ||
1689 | mmio: | |
1690 | /* | |
1691 | * Is this MMIO handled locally? | |
1692 | */ | |
10589a46 | 1693 | mutex_lock(&vcpu->kvm->lock); |
bbd9b64e CO |
1694 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); |
1695 | if (mmio_dev) { | |
1696 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
10589a46 | 1697 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
1698 | return X86EMUL_CONTINUE; |
1699 | } | |
10589a46 | 1700 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
1701 | |
1702 | vcpu->mmio_needed = 1; | |
1703 | vcpu->mmio_phys_addr = gpa; | |
1704 | vcpu->mmio_size = bytes; | |
1705 | vcpu->mmio_is_write = 1; | |
1706 | memcpy(vcpu->mmio_data, val, bytes); | |
1707 | ||
1708 | return X86EMUL_CONTINUE; | |
1709 | } | |
1710 | ||
1711 | int emulator_write_emulated(unsigned long addr, | |
1712 | const void *val, | |
1713 | unsigned int bytes, | |
1714 | struct kvm_vcpu *vcpu) | |
1715 | { | |
1716 | /* Crossing a page boundary? */ | |
1717 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
1718 | int rc, now; | |
1719 | ||
1720 | now = -addr & ~PAGE_MASK; | |
1721 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
1722 | if (rc != X86EMUL_CONTINUE) | |
1723 | return rc; | |
1724 | addr += now; | |
1725 | val += now; | |
1726 | bytes -= now; | |
1727 | } | |
1728 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
1729 | } | |
1730 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
1731 | ||
1732 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
1733 | const void *old, | |
1734 | const void *new, | |
1735 | unsigned int bytes, | |
1736 | struct kvm_vcpu *vcpu) | |
1737 | { | |
1738 | static int reported; | |
1739 | ||
1740 | if (!reported) { | |
1741 | reported = 1; | |
1742 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1743 | } | |
2bacc55c MT |
1744 | #ifndef CONFIG_X86_64 |
1745 | /* guests cmpxchg8b have to be emulated atomically */ | |
1746 | if (bytes == 8) { | |
10589a46 | 1747 | gpa_t gpa; |
2bacc55c | 1748 | struct page *page; |
c0b49b0d | 1749 | char *kaddr; |
2bacc55c MT |
1750 | u64 val; |
1751 | ||
10589a46 MT |
1752 | down_read(¤t->mm->mmap_sem); |
1753 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); | |
1754 | ||
2bacc55c MT |
1755 | if (gpa == UNMAPPED_GVA || |
1756 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
1757 | goto emul_write; | |
1758 | ||
1759 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
1760 | goto emul_write; | |
1761 | ||
1762 | val = *(u64 *)new; | |
1763 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); | |
c0b49b0d AM |
1764 | kaddr = kmap_atomic(page, KM_USER0); |
1765 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
1766 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c | 1767 | kvm_release_page_dirty(page); |
10589a46 MT |
1768 | emul_write: |
1769 | up_read(¤t->mm->mmap_sem); | |
2bacc55c | 1770 | } |
2bacc55c MT |
1771 | #endif |
1772 | ||
bbd9b64e CO |
1773 | return emulator_write_emulated(addr, new, bytes, vcpu); |
1774 | } | |
1775 | ||
1776 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1777 | { | |
1778 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
1779 | } | |
1780 | ||
1781 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1782 | { | |
1783 | return X86EMUL_CONTINUE; | |
1784 | } | |
1785 | ||
1786 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1787 | { | |
ad312c7c | 1788 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
1789 | return X86EMUL_CONTINUE; |
1790 | } | |
1791 | ||
1792 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
1793 | { | |
1794 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1795 | ||
1796 | switch (dr) { | |
1797 | case 0 ... 3: | |
1798 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
1799 | return X86EMUL_CONTINUE; | |
1800 | default: | |
1801 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr); | |
1802 | return X86EMUL_UNHANDLEABLE; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1807 | { | |
1808 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1809 | int exception; | |
1810 | ||
1811 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1812 | if (exception) { | |
1813 | /* FIXME: better handling */ | |
1814 | return X86EMUL_UNHANDLEABLE; | |
1815 | } | |
1816 | return X86EMUL_CONTINUE; | |
1817 | } | |
1818 | ||
1819 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
1820 | { | |
1821 | static int reported; | |
1822 | u8 opcodes[4]; | |
ad312c7c | 1823 | unsigned long rip = vcpu->arch.rip; |
bbd9b64e CO |
1824 | unsigned long rip_linear; |
1825 | ||
1826 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); | |
1827 | ||
1828 | if (reported) | |
1829 | return; | |
1830 | ||
1831 | emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu); | |
1832 | ||
1833 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
1834 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1835 | reported = 1; | |
1836 | } | |
1837 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
1838 | ||
1839 | struct x86_emulate_ops emulate_ops = { | |
1840 | .read_std = emulator_read_std, | |
bbd9b64e CO |
1841 | .read_emulated = emulator_read_emulated, |
1842 | .write_emulated = emulator_write_emulated, | |
1843 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1844 | }; | |
1845 | ||
1846 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1847 | struct kvm_run *run, | |
1848 | unsigned long cr2, | |
1849 | u16 error_code, | |
571008da | 1850 | int emulation_type) |
bbd9b64e CO |
1851 | { |
1852 | int r; | |
571008da | 1853 | struct decode_cache *c; |
bbd9b64e | 1854 | |
ad312c7c | 1855 | vcpu->arch.mmio_fault_cr2 = cr2; |
bbd9b64e CO |
1856 | kvm_x86_ops->cache_regs(vcpu); |
1857 | ||
1858 | vcpu->mmio_is_write = 0; | |
ad312c7c | 1859 | vcpu->arch.pio.string = 0; |
bbd9b64e | 1860 | |
571008da | 1861 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
1862 | int cs_db, cs_l; |
1863 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1864 | ||
ad312c7c ZX |
1865 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
1866 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
1867 | vcpu->arch.emulate_ctxt.mode = | |
1868 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
1869 | ? X86EMUL_MODE_REAL : cs_l |
1870 | ? X86EMUL_MODE_PROT64 : cs_db | |
1871 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1872 | ||
ad312c7c ZX |
1873 | if (vcpu->arch.emulate_ctxt.mode == X86EMUL_MODE_PROT64) { |
1874 | vcpu->arch.emulate_ctxt.cs_base = 0; | |
1875 | vcpu->arch.emulate_ctxt.ds_base = 0; | |
1876 | vcpu->arch.emulate_ctxt.es_base = 0; | |
1877 | vcpu->arch.emulate_ctxt.ss_base = 0; | |
bbd9b64e | 1878 | } else { |
ad312c7c | 1879 | vcpu->arch.emulate_ctxt.cs_base = |
bbd9b64e | 1880 | get_segment_base(vcpu, VCPU_SREG_CS); |
ad312c7c | 1881 | vcpu->arch.emulate_ctxt.ds_base = |
bbd9b64e | 1882 | get_segment_base(vcpu, VCPU_SREG_DS); |
ad312c7c | 1883 | vcpu->arch.emulate_ctxt.es_base = |
bbd9b64e | 1884 | get_segment_base(vcpu, VCPU_SREG_ES); |
ad312c7c | 1885 | vcpu->arch.emulate_ctxt.ss_base = |
bbd9b64e CO |
1886 | get_segment_base(vcpu, VCPU_SREG_SS); |
1887 | } | |
1888 | ||
ad312c7c | 1889 | vcpu->arch.emulate_ctxt.gs_base = |
bbd9b64e | 1890 | get_segment_base(vcpu, VCPU_SREG_GS); |
ad312c7c | 1891 | vcpu->arch.emulate_ctxt.fs_base = |
bbd9b64e CO |
1892 | get_segment_base(vcpu, VCPU_SREG_FS); |
1893 | ||
ad312c7c | 1894 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da SY |
1895 | |
1896 | /* Reject the instructions other than VMCALL/VMMCALL when | |
1897 | * try to emulate invalid opcode */ | |
1898 | c = &vcpu->arch.emulate_ctxt.decode; | |
1899 | if ((emulation_type & EMULTYPE_TRAP_UD) && | |
1900 | (!(c->twobyte && c->b == 0x01 && | |
1901 | (c->modrm_reg == 0 || c->modrm_reg == 3) && | |
1902 | c->modrm_mod == 3 && c->modrm_rm == 1))) | |
1903 | return EMULATE_FAIL; | |
1904 | ||
f2b5756b | 1905 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 1906 | if (r) { |
f2b5756b | 1907 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
1908 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1909 | return EMULATE_DONE; | |
1910 | return EMULATE_FAIL; | |
1911 | } | |
1912 | } | |
1913 | ||
ad312c7c | 1914 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
bbd9b64e | 1915 | |
ad312c7c | 1916 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
1917 | return EMULATE_DO_MMIO; |
1918 | ||
1919 | if ((r || vcpu->mmio_is_write) && run) { | |
1920 | run->exit_reason = KVM_EXIT_MMIO; | |
1921 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
1922 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1923 | run->mmio.len = vcpu->mmio_size; | |
1924 | run->mmio.is_write = vcpu->mmio_is_write; | |
1925 | } | |
1926 | ||
1927 | if (r) { | |
1928 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
1929 | return EMULATE_DONE; | |
1930 | if (!vcpu->mmio_needed) { | |
1931 | kvm_report_emulation_failure(vcpu, "mmio"); | |
1932 | return EMULATE_FAIL; | |
1933 | } | |
1934 | return EMULATE_DO_MMIO; | |
1935 | } | |
1936 | ||
1937 | kvm_x86_ops->decache_regs(vcpu); | |
ad312c7c | 1938 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
1939 | |
1940 | if (vcpu->mmio_is_write) { | |
1941 | vcpu->mmio_needed = 0; | |
1942 | return EMULATE_DO_MMIO; | |
1943 | } | |
1944 | ||
1945 | return EMULATE_DONE; | |
1946 | } | |
1947 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1948 | ||
de7d789a CO |
1949 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
1950 | { | |
1951 | int i; | |
1952 | ||
ad312c7c ZX |
1953 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.pio.guest_pages); ++i) |
1954 | if (vcpu->arch.pio.guest_pages[i]) { | |
1955 | kvm_release_page_dirty(vcpu->arch.pio.guest_pages[i]); | |
1956 | vcpu->arch.pio.guest_pages[i] = NULL; | |
de7d789a CO |
1957 | } |
1958 | } | |
1959 | ||
1960 | static int pio_copy_data(struct kvm_vcpu *vcpu) | |
1961 | { | |
ad312c7c | 1962 | void *p = vcpu->arch.pio_data; |
de7d789a CO |
1963 | void *q; |
1964 | unsigned bytes; | |
ad312c7c | 1965 | int nr_pages = vcpu->arch.pio.guest_pages[1] ? 2 : 1; |
de7d789a | 1966 | |
ad312c7c | 1967 | q = vmap(vcpu->arch.pio.guest_pages, nr_pages, VM_READ|VM_WRITE, |
de7d789a CO |
1968 | PAGE_KERNEL); |
1969 | if (!q) { | |
1970 | free_pio_guest_pages(vcpu); | |
1971 | return -ENOMEM; | |
1972 | } | |
ad312c7c ZX |
1973 | q += vcpu->arch.pio.guest_page_offset; |
1974 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; | |
1975 | if (vcpu->arch.pio.in) | |
de7d789a CO |
1976 | memcpy(q, p, bytes); |
1977 | else | |
1978 | memcpy(p, q, bytes); | |
ad312c7c | 1979 | q -= vcpu->arch.pio.guest_page_offset; |
de7d789a CO |
1980 | vunmap(q); |
1981 | free_pio_guest_pages(vcpu); | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | int complete_pio(struct kvm_vcpu *vcpu) | |
1986 | { | |
ad312c7c | 1987 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
1988 | long delta; |
1989 | int r; | |
1990 | ||
1991 | kvm_x86_ops->cache_regs(vcpu); | |
1992 | ||
1993 | if (!io->string) { | |
1994 | if (io->in) | |
ad312c7c | 1995 | memcpy(&vcpu->arch.regs[VCPU_REGS_RAX], vcpu->arch.pio_data, |
de7d789a CO |
1996 | io->size); |
1997 | } else { | |
1998 | if (io->in) { | |
1999 | r = pio_copy_data(vcpu); | |
2000 | if (r) { | |
2001 | kvm_x86_ops->cache_regs(vcpu); | |
2002 | return r; | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | delta = 1; | |
2007 | if (io->rep) { | |
2008 | delta *= io->cur_count; | |
2009 | /* | |
2010 | * The size of the register should really depend on | |
2011 | * current address size. | |
2012 | */ | |
ad312c7c | 2013 | vcpu->arch.regs[VCPU_REGS_RCX] -= delta; |
de7d789a CO |
2014 | } |
2015 | if (io->down) | |
2016 | delta = -delta; | |
2017 | delta *= io->size; | |
2018 | if (io->in) | |
ad312c7c | 2019 | vcpu->arch.regs[VCPU_REGS_RDI] += delta; |
de7d789a | 2020 | else |
ad312c7c | 2021 | vcpu->arch.regs[VCPU_REGS_RSI] += delta; |
de7d789a CO |
2022 | } |
2023 | ||
2024 | kvm_x86_ops->decache_regs(vcpu); | |
2025 | ||
2026 | io->count -= io->cur_count; | |
2027 | io->cur_count = 0; | |
2028 | ||
2029 | return 0; | |
2030 | } | |
2031 | ||
2032 | static void kernel_pio(struct kvm_io_device *pio_dev, | |
2033 | struct kvm_vcpu *vcpu, | |
2034 | void *pd) | |
2035 | { | |
2036 | /* TODO: String I/O for in kernel device */ | |
2037 | ||
2038 | mutex_lock(&vcpu->kvm->lock); | |
ad312c7c ZX |
2039 | if (vcpu->arch.pio.in) |
2040 | kvm_iodevice_read(pio_dev, vcpu->arch.pio.port, | |
2041 | vcpu->arch.pio.size, | |
de7d789a CO |
2042 | pd); |
2043 | else | |
ad312c7c ZX |
2044 | kvm_iodevice_write(pio_dev, vcpu->arch.pio.port, |
2045 | vcpu->arch.pio.size, | |
de7d789a CO |
2046 | pd); |
2047 | mutex_unlock(&vcpu->kvm->lock); | |
2048 | } | |
2049 | ||
2050 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
2051 | struct kvm_vcpu *vcpu) | |
2052 | { | |
ad312c7c ZX |
2053 | struct kvm_pio_request *io = &vcpu->arch.pio; |
2054 | void *pd = vcpu->arch.pio_data; | |
de7d789a CO |
2055 | int i; |
2056 | ||
2057 | mutex_lock(&vcpu->kvm->lock); | |
2058 | for (i = 0; i < io->cur_count; i++) { | |
2059 | kvm_iodevice_write(pio_dev, io->port, | |
2060 | io->size, | |
2061 | pd); | |
2062 | pd += io->size; | |
2063 | } | |
2064 | mutex_unlock(&vcpu->kvm->lock); | |
2065 | } | |
2066 | ||
2067 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, | |
2068 | gpa_t addr) | |
2069 | { | |
2070 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr); | |
2071 | } | |
2072 | ||
2073 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2074 | int size, unsigned port) | |
2075 | { | |
2076 | struct kvm_io_device *pio_dev; | |
2077 | ||
2078 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2079 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2080 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2081 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2082 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
2083 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2084 | vcpu->arch.pio.in = in; | |
2085 | vcpu->arch.pio.string = 0; | |
2086 | vcpu->arch.pio.down = 0; | |
2087 | vcpu->arch.pio.guest_page_offset = 0; | |
2088 | vcpu->arch.pio.rep = 0; | |
de7d789a CO |
2089 | |
2090 | kvm_x86_ops->cache_regs(vcpu); | |
ad312c7c | 2091 | memcpy(vcpu->arch.pio_data, &vcpu->arch.regs[VCPU_REGS_RAX], 4); |
de7d789a CO |
2092 | kvm_x86_ops->decache_regs(vcpu); |
2093 | ||
2094 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2095 | ||
2096 | pio_dev = vcpu_find_pio_dev(vcpu, port); | |
2097 | if (pio_dev) { | |
ad312c7c | 2098 | kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); |
de7d789a CO |
2099 | complete_pio(vcpu); |
2100 | return 1; | |
2101 | } | |
2102 | return 0; | |
2103 | } | |
2104 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2105 | ||
2106 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2107 | int size, unsigned long count, int down, | |
2108 | gva_t address, int rep, unsigned port) | |
2109 | { | |
2110 | unsigned now, in_page; | |
2111 | int i, ret = 0; | |
2112 | int nr_pages = 1; | |
2113 | struct page *page; | |
2114 | struct kvm_io_device *pio_dev; | |
2115 | ||
2116 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2117 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2118 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2119 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2120 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
2121 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2122 | vcpu->arch.pio.in = in; | |
2123 | vcpu->arch.pio.string = 1; | |
2124 | vcpu->arch.pio.down = down; | |
2125 | vcpu->arch.pio.guest_page_offset = offset_in_page(address); | |
2126 | vcpu->arch.pio.rep = rep; | |
de7d789a CO |
2127 | |
2128 | if (!count) { | |
2129 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2130 | return 1; | |
2131 | } | |
2132 | ||
2133 | if (!down) | |
2134 | in_page = PAGE_SIZE - offset_in_page(address); | |
2135 | else | |
2136 | in_page = offset_in_page(address) + size; | |
2137 | now = min(count, (unsigned long)in_page / size); | |
2138 | if (!now) { | |
2139 | /* | |
2140 | * String I/O straddles page boundary. Pin two guest pages | |
2141 | * so that we satisfy atomicity constraints. Do just one | |
2142 | * transaction to avoid complexity. | |
2143 | */ | |
2144 | nr_pages = 2; | |
2145 | now = 1; | |
2146 | } | |
2147 | if (down) { | |
2148 | /* | |
2149 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
2150 | */ | |
2151 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 2152 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2153 | return 1; |
2154 | } | |
2155 | vcpu->run->io.count = now; | |
ad312c7c | 2156 | vcpu->arch.pio.cur_count = now; |
de7d789a | 2157 | |
ad312c7c | 2158 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
2159 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2160 | ||
2161 | for (i = 0; i < nr_pages; ++i) { | |
10589a46 | 2162 | down_read(¤t->mm->mmap_sem); |
de7d789a | 2163 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); |
ad312c7c | 2164 | vcpu->arch.pio.guest_pages[i] = page; |
10589a46 | 2165 | up_read(¤t->mm->mmap_sem); |
de7d789a | 2166 | if (!page) { |
c1a5d4f9 | 2167 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2168 | free_pio_guest_pages(vcpu); |
2169 | return 1; | |
2170 | } | |
2171 | } | |
2172 | ||
2173 | pio_dev = vcpu_find_pio_dev(vcpu, port); | |
ad312c7c | 2174 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
2175 | /* string PIO write */ |
2176 | ret = pio_copy_data(vcpu); | |
2177 | if (ret >= 0 && pio_dev) { | |
2178 | pio_string_write(pio_dev, vcpu); | |
2179 | complete_pio(vcpu); | |
ad312c7c | 2180 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
2181 | ret = 1; |
2182 | } | |
2183 | } else if (pio_dev) | |
2184 | pr_unimpl(vcpu, "no string pio read support yet, " | |
2185 | "port %x size %d count %ld\n", | |
2186 | port, size, count); | |
2187 | ||
2188 | return ret; | |
2189 | } | |
2190 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
2191 | ||
f8c16bba | 2192 | int kvm_arch_init(void *opaque) |
043405e1 | 2193 | { |
56c6d28a | 2194 | int r; |
f8c16bba ZX |
2195 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
2196 | ||
f8c16bba ZX |
2197 | if (kvm_x86_ops) { |
2198 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
2199 | r = -EEXIST; |
2200 | goto out; | |
f8c16bba ZX |
2201 | } |
2202 | ||
2203 | if (!ops->cpu_has_kvm_support()) { | |
2204 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
2205 | r = -EOPNOTSUPP; |
2206 | goto out; | |
f8c16bba ZX |
2207 | } |
2208 | if (ops->disabled_by_bios()) { | |
2209 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
2210 | r = -EOPNOTSUPP; |
2211 | goto out; | |
f8c16bba ZX |
2212 | } |
2213 | ||
97db56ce AK |
2214 | r = kvm_mmu_module_init(); |
2215 | if (r) | |
2216 | goto out; | |
2217 | ||
2218 | kvm_init_msr_list(); | |
2219 | ||
f8c16bba | 2220 | kvm_x86_ops = ops; |
56c6d28a | 2221 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
f8c16bba | 2222 | return 0; |
56c6d28a ZX |
2223 | |
2224 | out: | |
56c6d28a | 2225 | return r; |
043405e1 | 2226 | } |
8776e519 | 2227 | |
f8c16bba ZX |
2228 | void kvm_arch_exit(void) |
2229 | { | |
2230 | kvm_x86_ops = NULL; | |
56c6d28a ZX |
2231 | kvm_mmu_module_exit(); |
2232 | } | |
f8c16bba | 2233 | |
8776e519 HB |
2234 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
2235 | { | |
2236 | ++vcpu->stat.halt_exits; | |
2237 | if (irqchip_in_kernel(vcpu->kvm)) { | |
ad312c7c | 2238 | vcpu->arch.mp_state = VCPU_MP_STATE_HALTED; |
8776e519 | 2239 | kvm_vcpu_block(vcpu); |
ad312c7c | 2240 | if (vcpu->arch.mp_state != VCPU_MP_STATE_RUNNABLE) |
8776e519 HB |
2241 | return -EINTR; |
2242 | return 1; | |
2243 | } else { | |
2244 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
2245 | return 0; | |
2246 | } | |
2247 | } | |
2248 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
2249 | ||
2250 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) | |
2251 | { | |
2252 | unsigned long nr, a0, a1, a2, a3, ret; | |
2253 | ||
2254 | kvm_x86_ops->cache_regs(vcpu); | |
2255 | ||
ad312c7c ZX |
2256 | nr = vcpu->arch.regs[VCPU_REGS_RAX]; |
2257 | a0 = vcpu->arch.regs[VCPU_REGS_RBX]; | |
2258 | a1 = vcpu->arch.regs[VCPU_REGS_RCX]; | |
2259 | a2 = vcpu->arch.regs[VCPU_REGS_RDX]; | |
2260 | a3 = vcpu->arch.regs[VCPU_REGS_RSI]; | |
8776e519 HB |
2261 | |
2262 | if (!is_long_mode(vcpu)) { | |
2263 | nr &= 0xFFFFFFFF; | |
2264 | a0 &= 0xFFFFFFFF; | |
2265 | a1 &= 0xFFFFFFFF; | |
2266 | a2 &= 0xFFFFFFFF; | |
2267 | a3 &= 0xFFFFFFFF; | |
2268 | } | |
2269 | ||
2270 | switch (nr) { | |
b93463aa AK |
2271 | case KVM_HC_VAPIC_POLL_IRQ: |
2272 | ret = 0; | |
2273 | break; | |
8776e519 HB |
2274 | default: |
2275 | ret = -KVM_ENOSYS; | |
2276 | break; | |
2277 | } | |
ad312c7c | 2278 | vcpu->arch.regs[VCPU_REGS_RAX] = ret; |
8776e519 HB |
2279 | kvm_x86_ops->decache_regs(vcpu); |
2280 | return 0; | |
2281 | } | |
2282 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
2283 | ||
2284 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
2285 | { | |
2286 | char instruction[3]; | |
2287 | int ret = 0; | |
2288 | ||
8776e519 HB |
2289 | |
2290 | /* | |
2291 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
2292 | * to ensure that the updated hypercall appears atomically across all | |
2293 | * VCPUs. | |
2294 | */ | |
2295 | kvm_mmu_zap_all(vcpu->kvm); | |
2296 | ||
2297 | kvm_x86_ops->cache_regs(vcpu); | |
2298 | kvm_x86_ops->patch_hypercall(vcpu, instruction); | |
ad312c7c | 2299 | if (emulator_write_emulated(vcpu->arch.rip, instruction, 3, vcpu) |
8776e519 HB |
2300 | != X86EMUL_CONTINUE) |
2301 | ret = -EFAULT; | |
2302 | ||
8776e519 HB |
2303 | return ret; |
2304 | } | |
2305 | ||
2306 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
2307 | { | |
2308 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
2309 | } | |
2310 | ||
2311 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2312 | { | |
2313 | struct descriptor_table dt = { limit, base }; | |
2314 | ||
2315 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
2316 | } | |
2317 | ||
2318 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2319 | { | |
2320 | struct descriptor_table dt = { limit, base }; | |
2321 | ||
2322 | kvm_x86_ops->set_idt(vcpu, &dt); | |
2323 | } | |
2324 | ||
2325 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
2326 | unsigned long *rflags) | |
2327 | { | |
2328 | lmsw(vcpu, msw); | |
2329 | *rflags = kvm_x86_ops->get_rflags(vcpu); | |
2330 | } | |
2331 | ||
2332 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
2333 | { | |
2334 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
2335 | switch (cr) { | |
2336 | case 0: | |
ad312c7c | 2337 | return vcpu->arch.cr0; |
8776e519 | 2338 | case 2: |
ad312c7c | 2339 | return vcpu->arch.cr2; |
8776e519 | 2340 | case 3: |
ad312c7c | 2341 | return vcpu->arch.cr3; |
8776e519 | 2342 | case 4: |
ad312c7c | 2343 | return vcpu->arch.cr4; |
152ff9be JR |
2344 | case 8: |
2345 | return get_cr8(vcpu); | |
8776e519 HB |
2346 | default: |
2347 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
2348 | return 0; | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
2353 | unsigned long *rflags) | |
2354 | { | |
2355 | switch (cr) { | |
2356 | case 0: | |
ad312c7c | 2357 | set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
8776e519 HB |
2358 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2359 | break; | |
2360 | case 2: | |
ad312c7c | 2361 | vcpu->arch.cr2 = val; |
8776e519 HB |
2362 | break; |
2363 | case 3: | |
2364 | set_cr3(vcpu, val); | |
2365 | break; | |
2366 | case 4: | |
ad312c7c | 2367 | set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
8776e519 | 2368 | break; |
152ff9be JR |
2369 | case 8: |
2370 | set_cr8(vcpu, val & 0xfUL); | |
2371 | break; | |
8776e519 HB |
2372 | default: |
2373 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
2374 | } | |
2375 | } | |
2376 | ||
07716717 DK |
2377 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
2378 | { | |
ad312c7c ZX |
2379 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
2380 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
2381 | |
2382 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2383 | /* when no next entry is found, the current entry[i] is reselected */ | |
2384 | for (j = i + 1; j == i; j = (j + 1) % nent) { | |
ad312c7c | 2385 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
2386 | if (ej->function == e->function) { |
2387 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2388 | return j; | |
2389 | } | |
2390 | } | |
2391 | return 0; /* silence gcc, even though control never reaches here */ | |
2392 | } | |
2393 | ||
2394 | /* find an entry with matching function, matching index (if needed), and that | |
2395 | * should be read next (if it's stateful) */ | |
2396 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
2397 | u32 function, u32 index) | |
2398 | { | |
2399 | if (e->function != function) | |
2400 | return 0; | |
2401 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
2402 | return 0; | |
2403 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
2404 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) | |
2405 | return 0; | |
2406 | return 1; | |
2407 | } | |
2408 | ||
8776e519 HB |
2409 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
2410 | { | |
2411 | int i; | |
07716717 DK |
2412 | u32 function, index; |
2413 | struct kvm_cpuid_entry2 *e, *best; | |
8776e519 HB |
2414 | |
2415 | kvm_x86_ops->cache_regs(vcpu); | |
ad312c7c ZX |
2416 | function = vcpu->arch.regs[VCPU_REGS_RAX]; |
2417 | index = vcpu->arch.regs[VCPU_REGS_RCX]; | |
2418 | vcpu->arch.regs[VCPU_REGS_RAX] = 0; | |
2419 | vcpu->arch.regs[VCPU_REGS_RBX] = 0; | |
2420 | vcpu->arch.regs[VCPU_REGS_RCX] = 0; | |
2421 | vcpu->arch.regs[VCPU_REGS_RDX] = 0; | |
8776e519 | 2422 | best = NULL; |
ad312c7c ZX |
2423 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
2424 | e = &vcpu->arch.cpuid_entries[i]; | |
07716717 DK |
2425 | if (is_matching_cpuid_entry(e, function, index)) { |
2426 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
2427 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
2428 | best = e; |
2429 | break; | |
2430 | } | |
2431 | /* | |
2432 | * Both basic or both extended? | |
2433 | */ | |
2434 | if (((e->function ^ function) & 0x80000000) == 0) | |
2435 | if (!best || e->function > best->function) | |
2436 | best = e; | |
2437 | } | |
2438 | if (best) { | |
ad312c7c ZX |
2439 | vcpu->arch.regs[VCPU_REGS_RAX] = best->eax; |
2440 | vcpu->arch.regs[VCPU_REGS_RBX] = best->ebx; | |
2441 | vcpu->arch.regs[VCPU_REGS_RCX] = best->ecx; | |
2442 | vcpu->arch.regs[VCPU_REGS_RDX] = best->edx; | |
8776e519 HB |
2443 | } |
2444 | kvm_x86_ops->decache_regs(vcpu); | |
2445 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2446 | } | |
2447 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 2448 | |
b6c7a5dc HB |
2449 | /* |
2450 | * Check if userspace requested an interrupt window, and that the | |
2451 | * interrupt window is open. | |
2452 | * | |
2453 | * No need to exit to userspace if we already have an interrupt queued. | |
2454 | */ | |
2455 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
2456 | struct kvm_run *kvm_run) | |
2457 | { | |
ad312c7c | 2458 | return (!vcpu->arch.irq_summary && |
b6c7a5dc | 2459 | kvm_run->request_interrupt_window && |
ad312c7c | 2460 | vcpu->arch.interrupt_window_open && |
b6c7a5dc HB |
2461 | (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF)); |
2462 | } | |
2463 | ||
2464 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
2465 | struct kvm_run *kvm_run) | |
2466 | { | |
2467 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2468 | kvm_run->cr8 = get_cr8(vcpu); | |
2469 | kvm_run->apic_base = kvm_get_apic_base(vcpu); | |
2470 | if (irqchip_in_kernel(vcpu->kvm)) | |
2471 | kvm_run->ready_for_interrupt_injection = 1; | |
2472 | else | |
2473 | kvm_run->ready_for_interrupt_injection = | |
ad312c7c ZX |
2474 | (vcpu->arch.interrupt_window_open && |
2475 | vcpu->arch.irq_summary == 0); | |
b6c7a5dc HB |
2476 | } |
2477 | ||
b93463aa AK |
2478 | static void vapic_enter(struct kvm_vcpu *vcpu) |
2479 | { | |
2480 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2481 | struct page *page; | |
2482 | ||
2483 | if (!apic || !apic->vapic_addr) | |
2484 | return; | |
2485 | ||
10589a46 | 2486 | down_read(¤t->mm->mmap_sem); |
b93463aa AK |
2487 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); |
2488 | vcpu->arch.apic->vapic_page = page; | |
10589a46 | 2489 | up_read(¤t->mm->mmap_sem); |
b93463aa AK |
2490 | } |
2491 | ||
2492 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
2493 | { | |
2494 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2495 | ||
2496 | if (!apic || !apic->vapic_addr) | |
2497 | return; | |
2498 | ||
2499 | kvm_release_page_dirty(apic->vapic_page); | |
2500 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
2501 | } | |
2502 | ||
b6c7a5dc HB |
2503 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2504 | { | |
2505 | int r; | |
2506 | ||
ad312c7c | 2507 | if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) { |
b6c7a5dc | 2508 | pr_debug("vcpu %d received sipi with vector # %x\n", |
ad312c7c | 2509 | vcpu->vcpu_id, vcpu->arch.sipi_vector); |
b6c7a5dc HB |
2510 | kvm_lapic_reset(vcpu); |
2511 | r = kvm_x86_ops->vcpu_reset(vcpu); | |
2512 | if (r) | |
2513 | return r; | |
ad312c7c | 2514 | vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE; |
b6c7a5dc HB |
2515 | } |
2516 | ||
b93463aa AK |
2517 | vapic_enter(vcpu); |
2518 | ||
b6c7a5dc HB |
2519 | preempted: |
2520 | if (vcpu->guest_debug.enabled) | |
2521 | kvm_x86_ops->guest_debug_pre(vcpu); | |
2522 | ||
2523 | again: | |
2524 | r = kvm_mmu_reload(vcpu); | |
2525 | if (unlikely(r)) | |
2526 | goto out; | |
2527 | ||
2f52d58c AK |
2528 | if (vcpu->requests) { |
2529 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2530 | __kvm_migrate_apic_timer(vcpu); | |
b93463aa AK |
2531 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
2532 | &vcpu->requests)) { | |
2533 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; | |
2534 | r = 0; | |
2535 | goto out; | |
2536 | } | |
2f52d58c | 2537 | } |
b93463aa | 2538 | |
b6c7a5dc HB |
2539 | kvm_inject_pending_timer_irqs(vcpu); |
2540 | ||
2541 | preempt_disable(); | |
2542 | ||
2543 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2544 | kvm_load_guest_fpu(vcpu); | |
2545 | ||
2546 | local_irq_disable(); | |
2547 | ||
6c142801 AK |
2548 | if (need_resched()) { |
2549 | local_irq_enable(); | |
2550 | preempt_enable(); | |
2551 | r = 1; | |
2552 | goto out; | |
2553 | } | |
2554 | ||
b6c7a5dc HB |
2555 | if (signal_pending(current)) { |
2556 | local_irq_enable(); | |
2557 | preempt_enable(); | |
2558 | r = -EINTR; | |
2559 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2560 | ++vcpu->stat.signal_exits; | |
2561 | goto out; | |
2562 | } | |
2563 | ||
ad312c7c | 2564 | if (vcpu->arch.exception.pending) |
298101da AK |
2565 | __queue_exception(vcpu); |
2566 | else if (irqchip_in_kernel(vcpu->kvm)) | |
b6c7a5dc | 2567 | kvm_x86_ops->inject_pending_irq(vcpu); |
eb9774f0 | 2568 | else |
b6c7a5dc HB |
2569 | kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run); |
2570 | ||
b93463aa AK |
2571 | kvm_lapic_sync_to_vapic(vcpu); |
2572 | ||
b6c7a5dc HB |
2573 | vcpu->guest_mode = 1; |
2574 | kvm_guest_enter(); | |
2575 | ||
2576 | if (vcpu->requests) | |
2577 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) | |
2578 | kvm_x86_ops->tlb_flush(vcpu); | |
2579 | ||
2580 | kvm_x86_ops->run(vcpu, kvm_run); | |
2581 | ||
2582 | vcpu->guest_mode = 0; | |
2583 | local_irq_enable(); | |
2584 | ||
2585 | ++vcpu->stat.exits; | |
2586 | ||
2587 | /* | |
2588 | * We must have an instruction between local_irq_enable() and | |
2589 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
2590 | * the interrupt shadow. The stat.exits increment will do nicely. | |
2591 | * But we need to prevent reordering, hence this barrier(): | |
2592 | */ | |
2593 | barrier(); | |
2594 | ||
2595 | kvm_guest_exit(); | |
2596 | ||
2597 | preempt_enable(); | |
2598 | ||
2599 | /* | |
2600 | * Profile KVM exit RIPs: | |
2601 | */ | |
2602 | if (unlikely(prof_on == KVM_PROFILING)) { | |
2603 | kvm_x86_ops->cache_regs(vcpu); | |
ad312c7c | 2604 | profile_hit(KVM_PROFILING, (void *)vcpu->arch.rip); |
b6c7a5dc HB |
2605 | } |
2606 | ||
ad312c7c ZX |
2607 | if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu)) |
2608 | vcpu->arch.exception.pending = false; | |
298101da | 2609 | |
b93463aa AK |
2610 | kvm_lapic_sync_from_vapic(vcpu); |
2611 | ||
b6c7a5dc HB |
2612 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
2613 | ||
2614 | if (r > 0) { | |
2615 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
2616 | r = -EINTR; | |
2617 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2618 | ++vcpu->stat.request_irq_exits; | |
2619 | goto out; | |
2620 | } | |
e1beb1d3 | 2621 | if (!need_resched()) |
b6c7a5dc | 2622 | goto again; |
b6c7a5dc HB |
2623 | } |
2624 | ||
2625 | out: | |
2626 | if (r > 0) { | |
2627 | kvm_resched(vcpu); | |
2628 | goto preempted; | |
2629 | } | |
2630 | ||
2631 | post_kvm_run_save(vcpu, kvm_run); | |
2632 | ||
b93463aa AK |
2633 | vapic_exit(vcpu); |
2634 | ||
b6c7a5dc HB |
2635 | return r; |
2636 | } | |
2637 | ||
2638 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2639 | { | |
2640 | int r; | |
2641 | sigset_t sigsaved; | |
2642 | ||
2643 | vcpu_load(vcpu); | |
2644 | ||
ad312c7c | 2645 | if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc HB |
2646 | kvm_vcpu_block(vcpu); |
2647 | vcpu_put(vcpu); | |
2648 | return -EAGAIN; | |
2649 | } | |
2650 | ||
2651 | if (vcpu->sigset_active) | |
2652 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2653 | ||
2654 | /* re-sync apic's tpr */ | |
2655 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2656 | set_cr8(vcpu, kvm_run->cr8); | |
2657 | ||
ad312c7c | 2658 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
2659 | r = complete_pio(vcpu); |
2660 | if (r) | |
2661 | goto out; | |
2662 | } | |
2663 | #if CONFIG_HAS_IOMEM | |
2664 | if (vcpu->mmio_needed) { | |
2665 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
2666 | vcpu->mmio_read_completed = 1; | |
2667 | vcpu->mmio_needed = 0; | |
2668 | r = emulate_instruction(vcpu, kvm_run, | |
571008da SY |
2669 | vcpu->arch.mmio_fault_cr2, 0, |
2670 | EMULTYPE_NO_DECODE); | |
b6c7a5dc HB |
2671 | if (r == EMULATE_DO_MMIO) { |
2672 | /* | |
2673 | * Read-modify-write. Back to userspace. | |
2674 | */ | |
2675 | r = 0; | |
2676 | goto out; | |
2677 | } | |
2678 | } | |
2679 | #endif | |
2680 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { | |
2681 | kvm_x86_ops->cache_regs(vcpu); | |
ad312c7c | 2682 | vcpu->arch.regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; |
b6c7a5dc HB |
2683 | kvm_x86_ops->decache_regs(vcpu); |
2684 | } | |
2685 | ||
2686 | r = __vcpu_run(vcpu, kvm_run); | |
2687 | ||
2688 | out: | |
2689 | if (vcpu->sigset_active) | |
2690 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2691 | ||
2692 | vcpu_put(vcpu); | |
2693 | return r; | |
2694 | } | |
2695 | ||
2696 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2697 | { | |
2698 | vcpu_load(vcpu); | |
2699 | ||
2700 | kvm_x86_ops->cache_regs(vcpu); | |
2701 | ||
ad312c7c ZX |
2702 | regs->rax = vcpu->arch.regs[VCPU_REGS_RAX]; |
2703 | regs->rbx = vcpu->arch.regs[VCPU_REGS_RBX]; | |
2704 | regs->rcx = vcpu->arch.regs[VCPU_REGS_RCX]; | |
2705 | regs->rdx = vcpu->arch.regs[VCPU_REGS_RDX]; | |
2706 | regs->rsi = vcpu->arch.regs[VCPU_REGS_RSI]; | |
2707 | regs->rdi = vcpu->arch.regs[VCPU_REGS_RDI]; | |
2708 | regs->rsp = vcpu->arch.regs[VCPU_REGS_RSP]; | |
2709 | regs->rbp = vcpu->arch.regs[VCPU_REGS_RBP]; | |
b6c7a5dc | 2710 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
2711 | regs->r8 = vcpu->arch.regs[VCPU_REGS_R8]; |
2712 | regs->r9 = vcpu->arch.regs[VCPU_REGS_R9]; | |
2713 | regs->r10 = vcpu->arch.regs[VCPU_REGS_R10]; | |
2714 | regs->r11 = vcpu->arch.regs[VCPU_REGS_R11]; | |
2715 | regs->r12 = vcpu->arch.regs[VCPU_REGS_R12]; | |
2716 | regs->r13 = vcpu->arch.regs[VCPU_REGS_R13]; | |
2717 | regs->r14 = vcpu->arch.regs[VCPU_REGS_R14]; | |
2718 | regs->r15 = vcpu->arch.regs[VCPU_REGS_R15]; | |
b6c7a5dc HB |
2719 | #endif |
2720 | ||
ad312c7c | 2721 | regs->rip = vcpu->arch.rip; |
b6c7a5dc HB |
2722 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
2723 | ||
2724 | /* | |
2725 | * Don't leak debug flags in case they were set for guest debugging | |
2726 | */ | |
2727 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
2728 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
2729 | ||
2730 | vcpu_put(vcpu); | |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2736 | { | |
2737 | vcpu_load(vcpu); | |
2738 | ||
ad312c7c ZX |
2739 | vcpu->arch.regs[VCPU_REGS_RAX] = regs->rax; |
2740 | vcpu->arch.regs[VCPU_REGS_RBX] = regs->rbx; | |
2741 | vcpu->arch.regs[VCPU_REGS_RCX] = regs->rcx; | |
2742 | vcpu->arch.regs[VCPU_REGS_RDX] = regs->rdx; | |
2743 | vcpu->arch.regs[VCPU_REGS_RSI] = regs->rsi; | |
2744 | vcpu->arch.regs[VCPU_REGS_RDI] = regs->rdi; | |
2745 | vcpu->arch.regs[VCPU_REGS_RSP] = regs->rsp; | |
2746 | vcpu->arch.regs[VCPU_REGS_RBP] = regs->rbp; | |
b6c7a5dc | 2747 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
2748 | vcpu->arch.regs[VCPU_REGS_R8] = regs->r8; |
2749 | vcpu->arch.regs[VCPU_REGS_R9] = regs->r9; | |
2750 | vcpu->arch.regs[VCPU_REGS_R10] = regs->r10; | |
2751 | vcpu->arch.regs[VCPU_REGS_R11] = regs->r11; | |
2752 | vcpu->arch.regs[VCPU_REGS_R12] = regs->r12; | |
2753 | vcpu->arch.regs[VCPU_REGS_R13] = regs->r13; | |
2754 | vcpu->arch.regs[VCPU_REGS_R14] = regs->r14; | |
2755 | vcpu->arch.regs[VCPU_REGS_R15] = regs->r15; | |
b6c7a5dc HB |
2756 | #endif |
2757 | ||
ad312c7c | 2758 | vcpu->arch.rip = regs->rip; |
b6c7a5dc HB |
2759 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
2760 | ||
2761 | kvm_x86_ops->decache_regs(vcpu); | |
2762 | ||
2763 | vcpu_put(vcpu); | |
2764 | ||
2765 | return 0; | |
2766 | } | |
2767 | ||
2768 | static void get_segment(struct kvm_vcpu *vcpu, | |
2769 | struct kvm_segment *var, int seg) | |
2770 | { | |
2771 | return kvm_x86_ops->get_segment(vcpu, var, seg); | |
2772 | } | |
2773 | ||
2774 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
2775 | { | |
2776 | struct kvm_segment cs; | |
2777 | ||
2778 | get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2779 | *db = cs.db; | |
2780 | *l = cs.l; | |
2781 | } | |
2782 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
2783 | ||
2784 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
2785 | struct kvm_sregs *sregs) | |
2786 | { | |
2787 | struct descriptor_table dt; | |
2788 | int pending_vec; | |
2789 | ||
2790 | vcpu_load(vcpu); | |
2791 | ||
2792 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2793 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2794 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2795 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2796 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2797 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2798 | ||
2799 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2800 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2801 | ||
2802 | kvm_x86_ops->get_idt(vcpu, &dt); | |
2803 | sregs->idt.limit = dt.limit; | |
2804 | sregs->idt.base = dt.base; | |
2805 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
2806 | sregs->gdt.limit = dt.limit; | |
2807 | sregs->gdt.base = dt.base; | |
2808 | ||
2809 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
ad312c7c ZX |
2810 | sregs->cr0 = vcpu->arch.cr0; |
2811 | sregs->cr2 = vcpu->arch.cr2; | |
2812 | sregs->cr3 = vcpu->arch.cr3; | |
2813 | sregs->cr4 = vcpu->arch.cr4; | |
b6c7a5dc | 2814 | sregs->cr8 = get_cr8(vcpu); |
ad312c7c | 2815 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
2816 | sregs->apic_base = kvm_get_apic_base(vcpu); |
2817 | ||
2818 | if (irqchip_in_kernel(vcpu->kvm)) { | |
2819 | memset(sregs->interrupt_bitmap, 0, | |
2820 | sizeof sregs->interrupt_bitmap); | |
2821 | pending_vec = kvm_x86_ops->get_irq(vcpu); | |
2822 | if (pending_vec >= 0) | |
2823 | set_bit(pending_vec, | |
2824 | (unsigned long *)sregs->interrupt_bitmap); | |
2825 | } else | |
ad312c7c | 2826 | memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending, |
b6c7a5dc HB |
2827 | sizeof sregs->interrupt_bitmap); |
2828 | ||
2829 | vcpu_put(vcpu); | |
2830 | ||
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | static void set_segment(struct kvm_vcpu *vcpu, | |
2835 | struct kvm_segment *var, int seg) | |
2836 | { | |
2837 | return kvm_x86_ops->set_segment(vcpu, var, seg); | |
2838 | } | |
2839 | ||
2840 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
2841 | struct kvm_sregs *sregs) | |
2842 | { | |
2843 | int mmu_reset_needed = 0; | |
2844 | int i, pending_vec, max_bits; | |
2845 | struct descriptor_table dt; | |
2846 | ||
2847 | vcpu_load(vcpu); | |
2848 | ||
2849 | dt.limit = sregs->idt.limit; | |
2850 | dt.base = sregs->idt.base; | |
2851 | kvm_x86_ops->set_idt(vcpu, &dt); | |
2852 | dt.limit = sregs->gdt.limit; | |
2853 | dt.base = sregs->gdt.base; | |
2854 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
2855 | ||
ad312c7c ZX |
2856 | vcpu->arch.cr2 = sregs->cr2; |
2857 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
2858 | vcpu->arch.cr3 = sregs->cr3; | |
b6c7a5dc HB |
2859 | |
2860 | set_cr8(vcpu, sregs->cr8); | |
2861 | ||
ad312c7c | 2862 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc HB |
2863 | #ifdef CONFIG_X86_64 |
2864 | kvm_x86_ops->set_efer(vcpu, sregs->efer); | |
2865 | #endif | |
2866 | kvm_set_apic_base(vcpu, sregs->apic_base); | |
2867 | ||
2868 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
2869 | ||
ad312c7c | 2870 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 2871 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 2872 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 2873 | |
ad312c7c | 2874 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
b6c7a5dc HB |
2875 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
2876 | if (!is_long_mode(vcpu) && is_pae(vcpu)) | |
ad312c7c | 2877 | load_pdptrs(vcpu, vcpu->arch.cr3); |
b6c7a5dc HB |
2878 | |
2879 | if (mmu_reset_needed) | |
2880 | kvm_mmu_reset_context(vcpu); | |
2881 | ||
2882 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
ad312c7c ZX |
2883 | memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap, |
2884 | sizeof vcpu->arch.irq_pending); | |
2885 | vcpu->arch.irq_summary = 0; | |
2886 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i) | |
2887 | if (vcpu->arch.irq_pending[i]) | |
2888 | __set_bit(i, &vcpu->arch.irq_summary); | |
b6c7a5dc HB |
2889 | } else { |
2890 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; | |
2891 | pending_vec = find_first_bit( | |
2892 | (const unsigned long *)sregs->interrupt_bitmap, | |
2893 | max_bits); | |
2894 | /* Only pending external irq is handled here */ | |
2895 | if (pending_vec < max_bits) { | |
2896 | kvm_x86_ops->set_irq(vcpu, pending_vec); | |
2897 | pr_debug("Set back pending irq %d\n", | |
2898 | pending_vec); | |
2899 | } | |
2900 | } | |
2901 | ||
2902 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2903 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2904 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2905 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2906 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2907 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2908 | ||
2909 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2910 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2911 | ||
2912 | vcpu_put(vcpu); | |
2913 | ||
2914 | return 0; | |
2915 | } | |
2916 | ||
2917 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
2918 | struct kvm_debug_guest *dbg) | |
2919 | { | |
2920 | int r; | |
2921 | ||
2922 | vcpu_load(vcpu); | |
2923 | ||
2924 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); | |
2925 | ||
2926 | vcpu_put(vcpu); | |
2927 | ||
2928 | return r; | |
2929 | } | |
2930 | ||
d0752060 HB |
2931 | /* |
2932 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2933 | * we have asm/x86/processor.h | |
2934 | */ | |
2935 | struct fxsave { | |
2936 | u16 cwd; | |
2937 | u16 swd; | |
2938 | u16 twd; | |
2939 | u16 fop; | |
2940 | u64 rip; | |
2941 | u64 rdp; | |
2942 | u32 mxcsr; | |
2943 | u32 mxcsr_mask; | |
2944 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2945 | #ifdef CONFIG_X86_64 | |
2946 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2947 | #else | |
2948 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2949 | #endif | |
2950 | }; | |
2951 | ||
8b006791 ZX |
2952 | /* |
2953 | * Translate a guest virtual address to a guest physical address. | |
2954 | */ | |
2955 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
2956 | struct kvm_translation *tr) | |
2957 | { | |
2958 | unsigned long vaddr = tr->linear_address; | |
2959 | gpa_t gpa; | |
2960 | ||
2961 | vcpu_load(vcpu); | |
10589a46 | 2962 | down_read(¤t->mm->mmap_sem); |
ad312c7c | 2963 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
10589a46 | 2964 | up_read(¤t->mm->mmap_sem); |
8b006791 ZX |
2965 | tr->physical_address = gpa; |
2966 | tr->valid = gpa != UNMAPPED_GVA; | |
2967 | tr->writeable = 1; | |
2968 | tr->usermode = 0; | |
8b006791 ZX |
2969 | vcpu_put(vcpu); |
2970 | ||
2971 | return 0; | |
2972 | } | |
2973 | ||
d0752060 HB |
2974 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
2975 | { | |
ad312c7c | 2976 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
2977 | |
2978 | vcpu_load(vcpu); | |
2979 | ||
2980 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2981 | fpu->fcw = fxsave->cwd; | |
2982 | fpu->fsw = fxsave->swd; | |
2983 | fpu->ftwx = fxsave->twd; | |
2984 | fpu->last_opcode = fxsave->fop; | |
2985 | fpu->last_ip = fxsave->rip; | |
2986 | fpu->last_dp = fxsave->rdp; | |
2987 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2988 | ||
2989 | vcpu_put(vcpu); | |
2990 | ||
2991 | return 0; | |
2992 | } | |
2993 | ||
2994 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2995 | { | |
ad312c7c | 2996 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
2997 | |
2998 | vcpu_load(vcpu); | |
2999 | ||
3000 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
3001 | fxsave->cwd = fpu->fcw; | |
3002 | fxsave->swd = fpu->fsw; | |
3003 | fxsave->twd = fpu->ftwx; | |
3004 | fxsave->fop = fpu->last_opcode; | |
3005 | fxsave->rip = fpu->last_ip; | |
3006 | fxsave->rdp = fpu->last_dp; | |
3007 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
3008 | ||
3009 | vcpu_put(vcpu); | |
3010 | ||
3011 | return 0; | |
3012 | } | |
3013 | ||
3014 | void fx_init(struct kvm_vcpu *vcpu) | |
3015 | { | |
3016 | unsigned after_mxcsr_mask; | |
3017 | ||
3018 | /* Initialize guest FPU by resetting ours and saving into guest's */ | |
3019 | preempt_disable(); | |
ad312c7c | 3020 | fx_save(&vcpu->arch.host_fx_image); |
d0752060 | 3021 | fpu_init(); |
ad312c7c ZX |
3022 | fx_save(&vcpu->arch.guest_fx_image); |
3023 | fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
3024 | preempt_enable(); |
3025 | ||
ad312c7c | 3026 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 3027 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
3028 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
3029 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
3030 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
3031 | } | |
3032 | EXPORT_SYMBOL_GPL(fx_init); | |
3033 | ||
3034 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
3035 | { | |
3036 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
3037 | return; | |
3038 | ||
3039 | vcpu->guest_fpu_loaded = 1; | |
ad312c7c ZX |
3040 | fx_save(&vcpu->arch.host_fx_image); |
3041 | fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
3042 | } |
3043 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
3044 | ||
3045 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
3046 | { | |
3047 | if (!vcpu->guest_fpu_loaded) | |
3048 | return; | |
3049 | ||
3050 | vcpu->guest_fpu_loaded = 0; | |
ad312c7c ZX |
3051 | fx_save(&vcpu->arch.guest_fx_image); |
3052 | fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 3053 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
3054 | } |
3055 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
3056 | |
3057 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
3058 | { | |
3059 | kvm_x86_ops->vcpu_free(vcpu); | |
3060 | } | |
3061 | ||
3062 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
3063 | unsigned int id) | |
3064 | { | |
26e5215f AK |
3065 | return kvm_x86_ops->vcpu_create(kvm, id); |
3066 | } | |
e9b11c17 | 3067 | |
26e5215f AK |
3068 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
3069 | { | |
3070 | int r; | |
e9b11c17 ZX |
3071 | |
3072 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 3073 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 ZX |
3074 | |
3075 | vcpu_load(vcpu); | |
3076 | r = kvm_arch_vcpu_reset(vcpu); | |
3077 | if (r == 0) | |
3078 | r = kvm_mmu_setup(vcpu); | |
3079 | vcpu_put(vcpu); | |
3080 | if (r < 0) | |
3081 | goto free_vcpu; | |
3082 | ||
26e5215f | 3083 | return 0; |
e9b11c17 ZX |
3084 | free_vcpu: |
3085 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 3086 | return r; |
e9b11c17 ZX |
3087 | } |
3088 | ||
d40ccc62 | 3089 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
3090 | { |
3091 | vcpu_load(vcpu); | |
3092 | kvm_mmu_unload(vcpu); | |
3093 | vcpu_put(vcpu); | |
3094 | ||
3095 | kvm_x86_ops->vcpu_free(vcpu); | |
3096 | } | |
3097 | ||
3098 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
3099 | { | |
3100 | return kvm_x86_ops->vcpu_reset(vcpu); | |
3101 | } | |
3102 | ||
3103 | void kvm_arch_hardware_enable(void *garbage) | |
3104 | { | |
3105 | kvm_x86_ops->hardware_enable(garbage); | |
3106 | } | |
3107 | ||
3108 | void kvm_arch_hardware_disable(void *garbage) | |
3109 | { | |
3110 | kvm_x86_ops->hardware_disable(garbage); | |
3111 | } | |
3112 | ||
3113 | int kvm_arch_hardware_setup(void) | |
3114 | { | |
3115 | return kvm_x86_ops->hardware_setup(); | |
3116 | } | |
3117 | ||
3118 | void kvm_arch_hardware_unsetup(void) | |
3119 | { | |
3120 | kvm_x86_ops->hardware_unsetup(); | |
3121 | } | |
3122 | ||
3123 | void kvm_arch_check_processor_compat(void *rtn) | |
3124 | { | |
3125 | kvm_x86_ops->check_processor_compatibility(rtn); | |
3126 | } | |
3127 | ||
3128 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
3129 | { | |
3130 | struct page *page; | |
3131 | struct kvm *kvm; | |
3132 | int r; | |
3133 | ||
3134 | BUG_ON(vcpu->kvm == NULL); | |
3135 | kvm = vcpu->kvm; | |
3136 | ||
ad312c7c | 3137 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
e9b11c17 | 3138 | if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) |
ad312c7c | 3139 | vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE; |
e9b11c17 | 3140 | else |
ad312c7c | 3141 | vcpu->arch.mp_state = VCPU_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
3142 | |
3143 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3144 | if (!page) { | |
3145 | r = -ENOMEM; | |
3146 | goto fail; | |
3147 | } | |
ad312c7c | 3148 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
3149 | |
3150 | r = kvm_mmu_create(vcpu); | |
3151 | if (r < 0) | |
3152 | goto fail_free_pio_data; | |
3153 | ||
3154 | if (irqchip_in_kernel(kvm)) { | |
3155 | r = kvm_create_lapic(vcpu); | |
3156 | if (r < 0) | |
3157 | goto fail_mmu_destroy; | |
3158 | } | |
3159 | ||
3160 | return 0; | |
3161 | ||
3162 | fail_mmu_destroy: | |
3163 | kvm_mmu_destroy(vcpu); | |
3164 | fail_free_pio_data: | |
ad312c7c | 3165 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
3166 | fail: |
3167 | return r; | |
3168 | } | |
3169 | ||
3170 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
3171 | { | |
3172 | kvm_free_lapic(vcpu); | |
3173 | kvm_mmu_destroy(vcpu); | |
ad312c7c | 3174 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 3175 | } |
d19a9cd2 ZX |
3176 | |
3177 | struct kvm *kvm_arch_create_vm(void) | |
3178 | { | |
3179 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
3180 | ||
3181 | if (!kvm) | |
3182 | return ERR_PTR(-ENOMEM); | |
3183 | ||
f05e70ac | 3184 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
d19a9cd2 ZX |
3185 | |
3186 | return kvm; | |
3187 | } | |
3188 | ||
3189 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
3190 | { | |
3191 | vcpu_load(vcpu); | |
3192 | kvm_mmu_unload(vcpu); | |
3193 | vcpu_put(vcpu); | |
3194 | } | |
3195 | ||
3196 | static void kvm_free_vcpus(struct kvm *kvm) | |
3197 | { | |
3198 | unsigned int i; | |
3199 | ||
3200 | /* | |
3201 | * Unpin any mmu pages first. | |
3202 | */ | |
3203 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
3204 | if (kvm->vcpus[i]) | |
3205 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
3206 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
3207 | if (kvm->vcpus[i]) { | |
3208 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
3209 | kvm->vcpus[i] = NULL; | |
3210 | } | |
3211 | } | |
3212 | ||
3213 | } | |
3214 | ||
3215 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
3216 | { | |
d7deeeb0 ZX |
3217 | kfree(kvm->arch.vpic); |
3218 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
3219 | kvm_free_vcpus(kvm); |
3220 | kvm_free_physmem(kvm); | |
3221 | kfree(kvm); | |
3222 | } | |
0de10343 ZX |
3223 | |
3224 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
3225 | struct kvm_userspace_memory_region *mem, | |
3226 | struct kvm_memory_slot old, | |
3227 | int user_alloc) | |
3228 | { | |
3229 | int npages = mem->memory_size >> PAGE_SHIFT; | |
3230 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
3231 | ||
3232 | /*To keep backward compatibility with older userspace, | |
3233 | *x86 needs to hanlde !user_alloc case. | |
3234 | */ | |
3235 | if (!user_alloc) { | |
3236 | if (npages && !old.rmap) { | |
0de10343 ZX |
3237 | memslot->userspace_addr = do_mmap(NULL, 0, |
3238 | npages * PAGE_SIZE, | |
3239 | PROT_READ | PROT_WRITE, | |
3240 | MAP_SHARED | MAP_ANONYMOUS, | |
3241 | 0); | |
0de10343 ZX |
3242 | |
3243 | if (IS_ERR((void *)memslot->userspace_addr)) | |
3244 | return PTR_ERR((void *)memslot->userspace_addr); | |
3245 | } else { | |
3246 | if (!old.user_alloc && old.rmap) { | |
3247 | int ret; | |
3248 | ||
0de10343 ZX |
3249 | ret = do_munmap(current->mm, old.userspace_addr, |
3250 | old.npages * PAGE_SIZE); | |
0de10343 ZX |
3251 | if (ret < 0) |
3252 | printk(KERN_WARNING | |
3253 | "kvm_vm_ioctl_set_memory_region: " | |
3254 | "failed to munmap memory\n"); | |
3255 | } | |
3256 | } | |
3257 | } | |
3258 | ||
f05e70ac | 3259 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
3260 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
3261 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
3262 | } | |
3263 | ||
3264 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
3265 | kvm_flush_remote_tlbs(kvm); | |
3266 | ||
3267 | return 0; | |
3268 | } | |
1d737c8a ZX |
3269 | |
3270 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) | |
3271 | { | |
3272 | return vcpu->arch.mp_state == VCPU_MP_STATE_RUNNABLE | |
3273 | || vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED; | |
3274 | } | |
5736199a ZX |
3275 | |
3276 | static void vcpu_kick_intr(void *info) | |
3277 | { | |
3278 | #ifdef DEBUG | |
3279 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info; | |
3280 | printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu); | |
3281 | #endif | |
3282 | } | |
3283 | ||
3284 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
3285 | { | |
3286 | int ipi_pcpu = vcpu->cpu; | |
3287 | ||
3288 | if (waitqueue_active(&vcpu->wq)) { | |
3289 | wake_up_interruptible(&vcpu->wq); | |
3290 | ++vcpu->stat.halt_wakeup; | |
3291 | } | |
3292 | if (vcpu->guest_mode) | |
3293 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0); | |
3294 | } |