2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Avi Kivity <avi@qumranet.com>
10 * Yaniv Kamay <yaniv@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
17 #include <linux/kvm_host.h>
21 #include <linux/clocksource.h>
22 #include <linux/kvm.h>
24 #include <linux/vmalloc.h>
25 #include <linux/module.h>
26 #include <linux/mman.h>
27 #include <linux/highmem.h>
29 #include <asm/uaccess.h>
33 #define MAX_IO_MSRS 256
34 #define CR0_RESERVED_BITS \
35 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
36 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
37 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
38 #define CR4_RESERVED_BITS \
39 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
40 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
41 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
42 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
44 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
46 * - enable syscall per default because its emulated by KVM
47 * - enable LME and LMA per default on 64 bit KVM
50 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
52 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
55 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
56 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
58 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
59 struct kvm_cpuid_entry2 __user *entries);
61 struct kvm_x86_ops *kvm_x86_ops;
63 struct kvm_stats_debugfs_item debugfs_entries[] = {
64 { "pf_fixed", VCPU_STAT(pf_fixed) },
65 { "pf_guest", VCPU_STAT(pf_guest) },
66 { "tlb_flush", VCPU_STAT(tlb_flush) },
67 { "invlpg", VCPU_STAT(invlpg) },
68 { "exits", VCPU_STAT(exits) },
69 { "io_exits", VCPU_STAT(io_exits) },
70 { "mmio_exits", VCPU_STAT(mmio_exits) },
71 { "signal_exits", VCPU_STAT(signal_exits) },
72 { "irq_window", VCPU_STAT(irq_window_exits) },
73 { "halt_exits", VCPU_STAT(halt_exits) },
74 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
75 { "hypercalls", VCPU_STAT(hypercalls) },
76 { "request_irq", VCPU_STAT(request_irq_exits) },
77 { "irq_exits", VCPU_STAT(irq_exits) },
78 { "host_state_reload", VCPU_STAT(host_state_reload) },
79 { "efer_reload", VCPU_STAT(efer_reload) },
80 { "fpu_reload", VCPU_STAT(fpu_reload) },
81 { "insn_emulation", VCPU_STAT(insn_emulation) },
82 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
83 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
84 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
85 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
86 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
87 { "mmu_flooded", VM_STAT(mmu_flooded) },
88 { "mmu_recycled", VM_STAT(mmu_recycled) },
89 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
90 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
91 { "largepages", VM_STAT(lpages) },
96 unsigned long segment_base(u16 selector)
98 struct descriptor_table gdt;
99 struct desc_struct *d;
100 unsigned long table_base;
106 asm("sgdt %0" : "=m"(gdt));
107 table_base = gdt.base;
109 if (selector & 4) { /* from ldt */
112 asm("sldt %0" : "=g"(ldt_selector));
113 table_base = segment_base(ldt_selector);
115 d = (struct desc_struct *)(table_base + (selector & ~7));
116 v = d->base0 | ((unsigned long)d->base1 << 16) |
117 ((unsigned long)d->base2 << 24);
119 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
120 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
124 EXPORT_SYMBOL_GPL(segment_base);
126 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
128 if (irqchip_in_kernel(vcpu->kvm))
129 return vcpu->arch.apic_base;
131 return vcpu->arch.apic_base;
133 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
135 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
137 /* TODO: reserve bits check */
138 if (irqchip_in_kernel(vcpu->kvm))
139 kvm_lapic_set_base(vcpu, data);
141 vcpu->arch.apic_base = data;
143 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
145 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
147 WARN_ON(vcpu->arch.exception.pending);
148 vcpu->arch.exception.pending = true;
149 vcpu->arch.exception.has_error_code = false;
150 vcpu->arch.exception.nr = nr;
152 EXPORT_SYMBOL_GPL(kvm_queue_exception);
154 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
157 ++vcpu->stat.pf_guest;
158 if (vcpu->arch.exception.pending) {
159 if (vcpu->arch.exception.nr == PF_VECTOR) {
160 printk(KERN_DEBUG "kvm: inject_page_fault:"
161 " double fault 0x%lx\n", addr);
162 vcpu->arch.exception.nr = DF_VECTOR;
163 vcpu->arch.exception.error_code = 0;
164 } else if (vcpu->arch.exception.nr == DF_VECTOR) {
165 /* triple fault -> shutdown */
166 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
170 vcpu->arch.cr2 = addr;
171 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
174 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
176 WARN_ON(vcpu->arch.exception.pending);
177 vcpu->arch.exception.pending = true;
178 vcpu->arch.exception.has_error_code = true;
179 vcpu->arch.exception.nr = nr;
180 vcpu->arch.exception.error_code = error_code;
182 EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
184 static void __queue_exception(struct kvm_vcpu *vcpu)
186 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
187 vcpu->arch.exception.has_error_code,
188 vcpu->arch.exception.error_code);
192 * Load the pae pdptrs. Return true is they are all valid.
194 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
196 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
197 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
200 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
202 down_read(&vcpu->kvm->slots_lock);
203 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
204 offset * sizeof(u64), sizeof(pdpte));
209 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
210 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
217 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
219 up_read(&vcpu->kvm->slots_lock);
223 EXPORT_SYMBOL_GPL(load_pdptrs);
225 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
227 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
231 if (is_long_mode(vcpu) || !is_pae(vcpu))
234 down_read(&vcpu->kvm->slots_lock);
235 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
238 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
240 up_read(&vcpu->kvm->slots_lock);
245 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
247 if (cr0 & CR0_RESERVED_BITS) {
248 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
249 cr0, vcpu->arch.cr0);
250 kvm_inject_gp(vcpu, 0);
254 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
255 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
256 kvm_inject_gp(vcpu, 0);
260 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
261 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
262 "and a clear PE flag\n");
263 kvm_inject_gp(vcpu, 0);
267 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
269 if ((vcpu->arch.shadow_efer & EFER_LME)) {
273 printk(KERN_DEBUG "set_cr0: #GP, start paging "
274 "in long mode while PAE is disabled\n");
275 kvm_inject_gp(vcpu, 0);
278 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
280 printk(KERN_DEBUG "set_cr0: #GP, start paging "
281 "in long mode while CS.L == 1\n");
282 kvm_inject_gp(vcpu, 0);
288 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
289 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
291 kvm_inject_gp(vcpu, 0);
297 kvm_x86_ops->set_cr0(vcpu, cr0);
298 vcpu->arch.cr0 = cr0;
300 kvm_mmu_reset_context(vcpu);
303 EXPORT_SYMBOL_GPL(kvm_set_cr0);
305 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
307 kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f));
309 EXPORT_SYMBOL_GPL(kvm_lmsw);
311 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
313 if (cr4 & CR4_RESERVED_BITS) {
314 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
315 kvm_inject_gp(vcpu, 0);
319 if (is_long_mode(vcpu)) {
320 if (!(cr4 & X86_CR4_PAE)) {
321 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
323 kvm_inject_gp(vcpu, 0);
326 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
327 && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
328 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
329 kvm_inject_gp(vcpu, 0);
333 if (cr4 & X86_CR4_VMXE) {
334 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
335 kvm_inject_gp(vcpu, 0);
338 kvm_x86_ops->set_cr4(vcpu, cr4);
339 vcpu->arch.cr4 = cr4;
340 kvm_mmu_reset_context(vcpu);
342 EXPORT_SYMBOL_GPL(kvm_set_cr4);
344 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
346 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
347 kvm_mmu_flush_tlb(vcpu);
351 if (is_long_mode(vcpu)) {
352 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
353 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
354 kvm_inject_gp(vcpu, 0);
359 if (cr3 & CR3_PAE_RESERVED_BITS) {
361 "set_cr3: #GP, reserved bits\n");
362 kvm_inject_gp(vcpu, 0);
365 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
366 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
368 kvm_inject_gp(vcpu, 0);
373 * We don't check reserved bits in nonpae mode, because
374 * this isn't enforced, and VMware depends on this.
378 down_read(&vcpu->kvm->slots_lock);
380 * Does the new cr3 value map to physical memory? (Note, we
381 * catch an invalid cr3 even in real-mode, because it would
382 * cause trouble later on when we turn on paging anyway.)
384 * A real CPU would silently accept an invalid cr3 and would
385 * attempt to use it - with largely undefined (and often hard
386 * to debug) behavior on the guest side.
388 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
389 kvm_inject_gp(vcpu, 0);
391 vcpu->arch.cr3 = cr3;
392 vcpu->arch.mmu.new_cr3(vcpu);
394 up_read(&vcpu->kvm->slots_lock);
396 EXPORT_SYMBOL_GPL(kvm_set_cr3);
398 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
400 if (cr8 & CR8_RESERVED_BITS) {
401 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
402 kvm_inject_gp(vcpu, 0);
405 if (irqchip_in_kernel(vcpu->kvm))
406 kvm_lapic_set_tpr(vcpu, cr8);
408 vcpu->arch.cr8 = cr8;
410 EXPORT_SYMBOL_GPL(kvm_set_cr8);
412 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
414 if (irqchip_in_kernel(vcpu->kvm))
415 return kvm_lapic_get_cr8(vcpu);
417 return vcpu->arch.cr8;
419 EXPORT_SYMBOL_GPL(kvm_get_cr8);
422 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
423 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
425 * This list is modified at module load time to reflect the
426 * capabilities of the host cpu.
428 static u32 msrs_to_save[] = {
429 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
432 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
434 MSR_IA32_TIME_STAMP_COUNTER, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
435 MSR_IA32_PERF_STATUS,
438 static unsigned num_msrs_to_save;
440 static u32 emulated_msrs[] = {
441 MSR_IA32_MISC_ENABLE,
444 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
446 if (efer & efer_reserved_bits) {
447 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
449 kvm_inject_gp(vcpu, 0);
454 && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) {
455 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
456 kvm_inject_gp(vcpu, 0);
460 kvm_x86_ops->set_efer(vcpu, efer);
463 efer |= vcpu->arch.shadow_efer & EFER_LMA;
465 vcpu->arch.shadow_efer = efer;
468 void kvm_enable_efer_bits(u64 mask)
470 efer_reserved_bits &= ~mask;
472 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
476 * Writes msr value into into the appropriate "register".
477 * Returns 0 on success, non-0 otherwise.
478 * Assumes vcpu_load() was already called.
480 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
482 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
486 * Adapt set_msr() to msr_io()'s calling convention
488 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
490 return kvm_set_msr(vcpu, index, *data);
493 static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
496 struct kvm_wall_clock wc;
497 struct timespec wc_ts;
504 down_read(&kvm->slots_lock);
505 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
507 wc_ts = current_kernel_time();
508 wc.wc_sec = wc_ts.tv_sec;
509 wc.wc_nsec = wc_ts.tv_nsec;
510 wc.wc_version = version;
512 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
515 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
516 up_read(&kvm->slots_lock);
519 static void kvm_write_guest_time(struct kvm_vcpu *v)
523 struct kvm_vcpu_arch *vcpu = &v->arch;
526 if ((!vcpu->time_page))
529 /* Keep irq disabled to prevent changes to the clock */
530 local_irq_save(flags);
531 kvm_get_msr(v, MSR_IA32_TIME_STAMP_COUNTER,
532 &vcpu->hv_clock.tsc_timestamp);
534 local_irq_restore(flags);
536 /* With all the info we got, fill in the values */
538 vcpu->hv_clock.system_time = ts.tv_nsec +
539 (NSEC_PER_SEC * (u64)ts.tv_sec);
541 * The interface expects us to write an even number signaling that the
542 * update is finished. Since the guest won't see the intermediate
543 * state, we just write "2" at the end
545 vcpu->hv_clock.version = 2;
547 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
549 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
550 sizeof(vcpu->hv_clock));
552 kunmap_atomic(shared_kaddr, KM_USER0);
554 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
558 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
562 set_efer(vcpu, data);
564 case MSR_IA32_MC0_STATUS:
565 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
568 case MSR_IA32_MCG_STATUS:
569 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
572 case MSR_IA32_MCG_CTL:
573 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
576 case MSR_IA32_UCODE_REV:
577 case MSR_IA32_UCODE_WRITE:
578 case 0x200 ... 0x2ff: /* MTRRs */
580 case MSR_IA32_APICBASE:
581 kvm_set_apic_base(vcpu, data);
583 case MSR_IA32_MISC_ENABLE:
584 vcpu->arch.ia32_misc_enable_msr = data;
586 case MSR_KVM_WALL_CLOCK:
587 vcpu->kvm->arch.wall_clock = data;
588 kvm_write_wall_clock(vcpu->kvm, data);
590 case MSR_KVM_SYSTEM_TIME: {
591 if (vcpu->arch.time_page) {
592 kvm_release_page_dirty(vcpu->arch.time_page);
593 vcpu->arch.time_page = NULL;
596 vcpu->arch.time = data;
598 /* we verify if the enable bit is set... */
602 /* ...but clean it before doing the actual write */
603 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
605 vcpu->arch.hv_clock.tsc_to_system_mul =
606 clocksource_khz2mult(tsc_khz, 22);
607 vcpu->arch.hv_clock.tsc_shift = 22;
609 down_read(¤t->mm->mmap_sem);
610 down_read(&vcpu->kvm->slots_lock);
611 vcpu->arch.time_page =
612 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
613 up_read(&vcpu->kvm->slots_lock);
614 up_read(¤t->mm->mmap_sem);
616 if (is_error_page(vcpu->arch.time_page)) {
617 kvm_release_page_clean(vcpu->arch.time_page);
618 vcpu->arch.time_page = NULL;
621 kvm_write_guest_time(vcpu);
625 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data);
630 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
634 * Reads an msr value (of 'msr_index') into 'pdata'.
635 * Returns 0 on success, non-0 otherwise.
636 * Assumes vcpu_load() was already called.
638 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
640 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
643 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
648 case 0xc0010010: /* SYSCFG */
649 case 0xc0010015: /* HWCR */
650 case MSR_IA32_PLATFORM_ID:
651 case MSR_IA32_P5_MC_ADDR:
652 case MSR_IA32_P5_MC_TYPE:
653 case MSR_IA32_MC0_CTL:
654 case MSR_IA32_MCG_STATUS:
655 case MSR_IA32_MCG_CAP:
656 case MSR_IA32_MCG_CTL:
657 case MSR_IA32_MC0_MISC:
658 case MSR_IA32_MC0_MISC+4:
659 case MSR_IA32_MC0_MISC+8:
660 case MSR_IA32_MC0_MISC+12:
661 case MSR_IA32_MC0_MISC+16:
662 case MSR_IA32_UCODE_REV:
663 case MSR_IA32_EBL_CR_POWERON:
666 case 0x200 ... 0x2ff:
669 case 0xcd: /* fsb frequency */
672 case MSR_IA32_APICBASE:
673 data = kvm_get_apic_base(vcpu);
675 case MSR_IA32_MISC_ENABLE:
676 data = vcpu->arch.ia32_misc_enable_msr;
678 case MSR_IA32_PERF_STATUS:
679 /* TSC increment by tick */
682 data |= (((uint64_t)4ULL) << 40);
685 data = vcpu->arch.shadow_efer;
687 case MSR_KVM_WALL_CLOCK:
688 data = vcpu->kvm->arch.wall_clock;
690 case MSR_KVM_SYSTEM_TIME:
691 data = vcpu->arch.time;
694 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
700 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
703 * Read or write a bunch of msrs. All parameters are kernel addresses.
705 * @return number of msrs set successfully.
707 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
708 struct kvm_msr_entry *entries,
709 int (*do_msr)(struct kvm_vcpu *vcpu,
710 unsigned index, u64 *data))
716 for (i = 0; i < msrs->nmsrs; ++i)
717 if (do_msr(vcpu, entries[i].index, &entries[i].data))
726 * Read or write a bunch of msrs. Parameters are user addresses.
728 * @return number of msrs set successfully.
730 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
731 int (*do_msr)(struct kvm_vcpu *vcpu,
732 unsigned index, u64 *data),
735 struct kvm_msrs msrs;
736 struct kvm_msr_entry *entries;
741 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
745 if (msrs.nmsrs >= MAX_IO_MSRS)
749 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
750 entries = vmalloc(size);
755 if (copy_from_user(entries, user_msrs->entries, size))
758 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
763 if (writeback && copy_to_user(user_msrs->entries, entries, size))
775 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
778 void decache_vcpus_on_cpu(int cpu)
781 struct kvm_vcpu *vcpu;
784 spin_lock(&kvm_lock);
785 list_for_each_entry(vm, &vm_list, vm_list)
786 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
791 * If the vcpu is locked, then it is running on some
792 * other cpu and therefore it is not cached on the
795 * If it's not locked, check the last cpu it executed
798 if (mutex_trylock(&vcpu->mutex)) {
799 if (vcpu->cpu == cpu) {
800 kvm_x86_ops->vcpu_decache(vcpu);
803 mutex_unlock(&vcpu->mutex);
806 spin_unlock(&kvm_lock);
809 int kvm_dev_ioctl_check_extension(long ext)
814 case KVM_CAP_IRQCHIP:
816 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
817 case KVM_CAP_USER_MEMORY:
818 case KVM_CAP_SET_TSS_ADDR:
819 case KVM_CAP_EXT_CPUID:
820 case KVM_CAP_CLOCKSOURCE:
824 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
826 case KVM_CAP_NR_VCPUS:
829 case KVM_CAP_NR_MEMSLOTS:
830 r = KVM_MEMORY_SLOTS;
840 long kvm_arch_dev_ioctl(struct file *filp,
841 unsigned int ioctl, unsigned long arg)
843 void __user *argp = (void __user *)arg;
847 case KVM_GET_MSR_INDEX_LIST: {
848 struct kvm_msr_list __user *user_msr_list = argp;
849 struct kvm_msr_list msr_list;
853 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
856 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
857 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
860 if (n < num_msrs_to_save)
863 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
864 num_msrs_to_save * sizeof(u32)))
866 if (copy_to_user(user_msr_list->indices
867 + num_msrs_to_save * sizeof(u32),
869 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
874 case KVM_GET_SUPPORTED_CPUID: {
875 struct kvm_cpuid2 __user *cpuid_arg = argp;
876 struct kvm_cpuid2 cpuid;
879 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
881 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
887 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
899 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
901 kvm_x86_ops->vcpu_load(vcpu, cpu);
902 kvm_write_guest_time(vcpu);
905 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
907 kvm_x86_ops->vcpu_put(vcpu);
908 kvm_put_guest_fpu(vcpu);
911 static int is_efer_nx(void)
915 rdmsrl(MSR_EFER, efer);
916 return efer & EFER_NX;
919 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
922 struct kvm_cpuid_entry2 *e, *entry;
925 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
926 e = &vcpu->arch.cpuid_entries[i];
927 if (e->function == 0x80000001) {
932 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
933 entry->edx &= ~(1 << 20);
934 printk(KERN_INFO "kvm: guest NX capability removed\n");
938 /* when an old userspace process fills a new kernel module */
939 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
940 struct kvm_cpuid *cpuid,
941 struct kvm_cpuid_entry __user *entries)
944 struct kvm_cpuid_entry *cpuid_entries;
947 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
950 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
954 if (copy_from_user(cpuid_entries, entries,
955 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
957 for (i = 0; i < cpuid->nent; i++) {
958 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
959 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
960 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
961 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
962 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
963 vcpu->arch.cpuid_entries[i].index = 0;
964 vcpu->arch.cpuid_entries[i].flags = 0;
965 vcpu->arch.cpuid_entries[i].padding[0] = 0;
966 vcpu->arch.cpuid_entries[i].padding[1] = 0;
967 vcpu->arch.cpuid_entries[i].padding[2] = 0;
969 vcpu->arch.cpuid_nent = cpuid->nent;
970 cpuid_fix_nx_cap(vcpu);
974 vfree(cpuid_entries);
979 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
980 struct kvm_cpuid2 *cpuid,
981 struct kvm_cpuid_entry2 __user *entries)
986 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
989 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
990 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
992 vcpu->arch.cpuid_nent = cpuid->nent;
999 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
1000 struct kvm_cpuid2 *cpuid,
1001 struct kvm_cpuid_entry2 __user *entries)
1006 if (cpuid->nent < vcpu->arch.cpuid_nent)
1009 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
1010 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
1015 cpuid->nent = vcpu->arch.cpuid_nent;
1019 static inline u32 bit(int bitno)
1021 return 1 << (bitno & 31);
1024 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1027 entry->function = function;
1028 entry->index = index;
1029 cpuid_count(entry->function, entry->index,
1030 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
1034 static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1035 u32 index, int *nent, int maxnent)
1037 const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) |
1038 bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) |
1039 bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) |
1040 bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) |
1041 bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) |
1042 bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) |
1043 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
1044 bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) |
1045 bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) |
1046 bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP);
1047 const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) |
1048 bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) |
1049 bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) |
1050 bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) |
1051 bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) |
1052 bit(X86_FEATURE_PGE) |
1053 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
1054 bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) |
1055 bit(X86_FEATURE_SYSCALL) |
1056 (bit(X86_FEATURE_NX) && is_efer_nx()) |
1057 #ifdef CONFIG_X86_64
1058 bit(X86_FEATURE_LM) |
1060 bit(X86_FEATURE_MMXEXT) |
1061 bit(X86_FEATURE_3DNOWEXT) |
1062 bit(X86_FEATURE_3DNOW);
1063 const u32 kvm_supported_word3_x86_features =
1064 bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16);
1065 const u32 kvm_supported_word6_x86_features =
1066 bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY);
1068 /* all func 2 cpuid_count() should be called on the same cpu */
1070 do_cpuid_1_ent(entry, function, index);
1075 entry->eax = min(entry->eax, (u32)0xb);
1078 entry->edx &= kvm_supported_word0_x86_features;
1079 entry->ecx &= kvm_supported_word3_x86_features;
1081 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1082 * may return different values. This forces us to get_cpu() before
1083 * issuing the first command, and also to emulate this annoying behavior
1084 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1086 int t, times = entry->eax & 0xff;
1088 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1089 for (t = 1; t < times && *nent < maxnent; ++t) {
1090 do_cpuid_1_ent(&entry[t], function, 0);
1091 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1096 /* function 4 and 0xb have additional index. */
1100 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1101 /* read more entries until cache_type is zero */
1102 for (i = 1; *nent < maxnent; ++i) {
1103 cache_type = entry[i - 1].eax & 0x1f;
1106 do_cpuid_1_ent(&entry[i], function, i);
1108 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1116 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1117 /* read more entries until level_type is zero */
1118 for (i = 1; *nent < maxnent; ++i) {
1119 level_type = entry[i - 1].ecx & 0xff;
1122 do_cpuid_1_ent(&entry[i], function, i);
1124 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1130 entry->eax = min(entry->eax, 0x8000001a);
1133 entry->edx &= kvm_supported_word1_x86_features;
1134 entry->ecx &= kvm_supported_word6_x86_features;
1140 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
1141 struct kvm_cpuid_entry2 __user *entries)
1143 struct kvm_cpuid_entry2 *cpuid_entries;
1144 int limit, nent = 0, r = -E2BIG;
1147 if (cpuid->nent < 1)
1150 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
1154 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
1155 limit = cpuid_entries[0].eax;
1156 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
1157 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1158 &nent, cpuid->nent);
1160 if (nent >= cpuid->nent)
1163 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
1164 limit = cpuid_entries[nent - 1].eax;
1165 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
1166 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1167 &nent, cpuid->nent);
1169 if (copy_to_user(entries, cpuid_entries,
1170 nent * sizeof(struct kvm_cpuid_entry2)))
1176 vfree(cpuid_entries);
1181 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
1182 struct kvm_lapic_state *s)
1185 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
1191 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
1192 struct kvm_lapic_state *s)
1195 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
1196 kvm_apic_post_state_restore(vcpu);
1202 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
1203 struct kvm_interrupt *irq)
1205 if (irq->irq < 0 || irq->irq >= 256)
1207 if (irqchip_in_kernel(vcpu->kvm))
1211 set_bit(irq->irq, vcpu->arch.irq_pending);
1212 set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
1219 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
1220 struct kvm_tpr_access_ctl *tac)
1224 vcpu->arch.tpr_access_reporting = !!tac->enabled;
1228 long kvm_arch_vcpu_ioctl(struct file *filp,
1229 unsigned int ioctl, unsigned long arg)
1231 struct kvm_vcpu *vcpu = filp->private_data;
1232 void __user *argp = (void __user *)arg;
1236 case KVM_GET_LAPIC: {
1237 struct kvm_lapic_state lapic;
1239 memset(&lapic, 0, sizeof lapic);
1240 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
1244 if (copy_to_user(argp, &lapic, sizeof lapic))
1249 case KVM_SET_LAPIC: {
1250 struct kvm_lapic_state lapic;
1253 if (copy_from_user(&lapic, argp, sizeof lapic))
1255 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
1261 case KVM_INTERRUPT: {
1262 struct kvm_interrupt irq;
1265 if (copy_from_user(&irq, argp, sizeof irq))
1267 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1273 case KVM_SET_CPUID: {
1274 struct kvm_cpuid __user *cpuid_arg = argp;
1275 struct kvm_cpuid cpuid;
1278 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1280 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
1285 case KVM_SET_CPUID2: {
1286 struct kvm_cpuid2 __user *cpuid_arg = argp;
1287 struct kvm_cpuid2 cpuid;
1290 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1292 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
1293 cpuid_arg->entries);
1298 case KVM_GET_CPUID2: {
1299 struct kvm_cpuid2 __user *cpuid_arg = argp;
1300 struct kvm_cpuid2 cpuid;
1303 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1305 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
1306 cpuid_arg->entries);
1310 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1316 r = msr_io(vcpu, argp, kvm_get_msr, 1);
1319 r = msr_io(vcpu, argp, do_set_msr, 0);
1321 case KVM_TPR_ACCESS_REPORTING: {
1322 struct kvm_tpr_access_ctl tac;
1325 if (copy_from_user(&tac, argp, sizeof tac))
1327 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
1331 if (copy_to_user(argp, &tac, sizeof tac))
1336 case KVM_SET_VAPIC_ADDR: {
1337 struct kvm_vapic_addr va;
1340 if (!irqchip_in_kernel(vcpu->kvm))
1343 if (copy_from_user(&va, argp, sizeof va))
1346 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
1356 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
1360 if (addr > (unsigned int)(-3 * PAGE_SIZE))
1362 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
1366 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
1367 u32 kvm_nr_mmu_pages)
1369 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
1372 down_write(&kvm->slots_lock);
1374 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
1375 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
1377 up_write(&kvm->slots_lock);
1381 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
1383 return kvm->arch.n_alloc_mmu_pages;
1386 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1389 struct kvm_mem_alias *alias;
1391 for (i = 0; i < kvm->arch.naliases; ++i) {
1392 alias = &kvm->arch.aliases[i];
1393 if (gfn >= alias->base_gfn
1394 && gfn < alias->base_gfn + alias->npages)
1395 return alias->target_gfn + gfn - alias->base_gfn;
1401 * Set a new alias region. Aliases map a portion of physical memory into
1402 * another portion. This is useful for memory windows, for example the PC
1405 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
1406 struct kvm_memory_alias *alias)
1409 struct kvm_mem_alias *p;
1412 /* General sanity checks */
1413 if (alias->memory_size & (PAGE_SIZE - 1))
1415 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
1417 if (alias->slot >= KVM_ALIAS_SLOTS)
1419 if (alias->guest_phys_addr + alias->memory_size
1420 < alias->guest_phys_addr)
1422 if (alias->target_phys_addr + alias->memory_size
1423 < alias->target_phys_addr)
1426 down_write(&kvm->slots_lock);
1428 p = &kvm->arch.aliases[alias->slot];
1429 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
1430 p->npages = alias->memory_size >> PAGE_SHIFT;
1431 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
1433 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
1434 if (kvm->arch.aliases[n - 1].npages)
1436 kvm->arch.naliases = n;
1438 kvm_mmu_zap_all(kvm);
1440 up_write(&kvm->slots_lock);
1448 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
1453 switch (chip->chip_id) {
1454 case KVM_IRQCHIP_PIC_MASTER:
1455 memcpy(&chip->chip.pic,
1456 &pic_irqchip(kvm)->pics[0],
1457 sizeof(struct kvm_pic_state));
1459 case KVM_IRQCHIP_PIC_SLAVE:
1460 memcpy(&chip->chip.pic,
1461 &pic_irqchip(kvm)->pics[1],
1462 sizeof(struct kvm_pic_state));
1464 case KVM_IRQCHIP_IOAPIC:
1465 memcpy(&chip->chip.ioapic,
1466 ioapic_irqchip(kvm),
1467 sizeof(struct kvm_ioapic_state));
1476 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
1481 switch (chip->chip_id) {
1482 case KVM_IRQCHIP_PIC_MASTER:
1483 memcpy(&pic_irqchip(kvm)->pics[0],
1485 sizeof(struct kvm_pic_state));
1487 case KVM_IRQCHIP_PIC_SLAVE:
1488 memcpy(&pic_irqchip(kvm)->pics[1],
1490 sizeof(struct kvm_pic_state));
1492 case KVM_IRQCHIP_IOAPIC:
1493 memcpy(ioapic_irqchip(kvm),
1495 sizeof(struct kvm_ioapic_state));
1501 kvm_pic_update_irq(pic_irqchip(kvm));
1506 * Get (and clear) the dirty memory log for a memory slot.
1508 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1509 struct kvm_dirty_log *log)
1513 struct kvm_memory_slot *memslot;
1516 down_write(&kvm->slots_lock);
1518 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1522 /* If nothing is dirty, don't bother messing with page tables. */
1524 kvm_mmu_slot_remove_write_access(kvm, log->slot);
1525 kvm_flush_remote_tlbs(kvm);
1526 memslot = &kvm->memslots[log->slot];
1527 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1528 memset(memslot->dirty_bitmap, 0, n);
1532 up_write(&kvm->slots_lock);
1536 long kvm_arch_vm_ioctl(struct file *filp,
1537 unsigned int ioctl, unsigned long arg)
1539 struct kvm *kvm = filp->private_data;
1540 void __user *argp = (void __user *)arg;
1544 case KVM_SET_TSS_ADDR:
1545 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
1549 case KVM_SET_MEMORY_REGION: {
1550 struct kvm_memory_region kvm_mem;
1551 struct kvm_userspace_memory_region kvm_userspace_mem;
1554 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
1556 kvm_userspace_mem.slot = kvm_mem.slot;
1557 kvm_userspace_mem.flags = kvm_mem.flags;
1558 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
1559 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
1560 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
1565 case KVM_SET_NR_MMU_PAGES:
1566 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
1570 case KVM_GET_NR_MMU_PAGES:
1571 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
1573 case KVM_SET_MEMORY_ALIAS: {
1574 struct kvm_memory_alias alias;
1577 if (copy_from_user(&alias, argp, sizeof alias))
1579 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
1584 case KVM_CREATE_IRQCHIP:
1586 kvm->arch.vpic = kvm_create_pic(kvm);
1587 if (kvm->arch.vpic) {
1588 r = kvm_ioapic_init(kvm);
1590 kfree(kvm->arch.vpic);
1591 kvm->arch.vpic = NULL;
1597 case KVM_IRQ_LINE: {
1598 struct kvm_irq_level irq_event;
1601 if (copy_from_user(&irq_event, argp, sizeof irq_event))
1603 if (irqchip_in_kernel(kvm)) {
1604 mutex_lock(&kvm->lock);
1605 if (irq_event.irq < 16)
1606 kvm_pic_set_irq(pic_irqchip(kvm),
1609 kvm_ioapic_set_irq(kvm->arch.vioapic,
1612 mutex_unlock(&kvm->lock);
1617 case KVM_GET_IRQCHIP: {
1618 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1619 struct kvm_irqchip chip;
1622 if (copy_from_user(&chip, argp, sizeof chip))
1625 if (!irqchip_in_kernel(kvm))
1627 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1631 if (copy_to_user(argp, &chip, sizeof chip))
1636 case KVM_SET_IRQCHIP: {
1637 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1638 struct kvm_irqchip chip;
1641 if (copy_from_user(&chip, argp, sizeof chip))
1644 if (!irqchip_in_kernel(kvm))
1646 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1659 static void kvm_init_msr_list(void)
1664 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1665 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1668 msrs_to_save[j] = msrs_to_save[i];
1671 num_msrs_to_save = j;
1675 * Only apic need an MMIO device hook, so shortcut now..
1677 static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1680 struct kvm_io_device *dev;
1682 if (vcpu->arch.apic) {
1683 dev = &vcpu->arch.apic->dev;
1684 if (dev->in_range(dev, addr))
1691 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1694 struct kvm_io_device *dev;
1696 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1698 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1702 int emulator_read_std(unsigned long addr,
1705 struct kvm_vcpu *vcpu)
1708 int r = X86EMUL_CONTINUE;
1710 down_read(&vcpu->kvm->slots_lock);
1712 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1713 unsigned offset = addr & (PAGE_SIZE-1);
1714 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1717 if (gpa == UNMAPPED_GVA) {
1718 r = X86EMUL_PROPAGATE_FAULT;
1721 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1723 r = X86EMUL_UNHANDLEABLE;
1732 up_read(&vcpu->kvm->slots_lock);
1735 EXPORT_SYMBOL_GPL(emulator_read_std);
1737 static int emulator_read_emulated(unsigned long addr,
1740 struct kvm_vcpu *vcpu)
1742 struct kvm_io_device *mmio_dev;
1745 if (vcpu->mmio_read_completed) {
1746 memcpy(val, vcpu->mmio_data, bytes);
1747 vcpu->mmio_read_completed = 0;
1748 return X86EMUL_CONTINUE;
1751 down_read(&vcpu->kvm->slots_lock);
1752 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1753 up_read(&vcpu->kvm->slots_lock);
1755 /* For APIC access vmexit */
1756 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1759 if (emulator_read_std(addr, val, bytes, vcpu)
1760 == X86EMUL_CONTINUE)
1761 return X86EMUL_CONTINUE;
1762 if (gpa == UNMAPPED_GVA)
1763 return X86EMUL_PROPAGATE_FAULT;
1767 * Is this MMIO handled locally?
1769 mutex_lock(&vcpu->kvm->lock);
1770 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1772 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1773 mutex_unlock(&vcpu->kvm->lock);
1774 return X86EMUL_CONTINUE;
1776 mutex_unlock(&vcpu->kvm->lock);
1778 vcpu->mmio_needed = 1;
1779 vcpu->mmio_phys_addr = gpa;
1780 vcpu->mmio_size = bytes;
1781 vcpu->mmio_is_write = 0;
1783 return X86EMUL_UNHANDLEABLE;
1786 static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1787 const void *val, int bytes)
1791 down_read(&vcpu->kvm->slots_lock);
1792 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1794 up_read(&vcpu->kvm->slots_lock);
1797 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1798 up_read(&vcpu->kvm->slots_lock);
1802 static int emulator_write_emulated_onepage(unsigned long addr,
1805 struct kvm_vcpu *vcpu)
1807 struct kvm_io_device *mmio_dev;
1810 down_read(&vcpu->kvm->slots_lock);
1811 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1812 up_read(&vcpu->kvm->slots_lock);
1814 if (gpa == UNMAPPED_GVA) {
1815 kvm_inject_page_fault(vcpu, addr, 2);
1816 return X86EMUL_PROPAGATE_FAULT;
1819 /* For APIC access vmexit */
1820 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1823 if (emulator_write_phys(vcpu, gpa, val, bytes))
1824 return X86EMUL_CONTINUE;
1828 * Is this MMIO handled locally?
1830 mutex_lock(&vcpu->kvm->lock);
1831 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1833 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1834 mutex_unlock(&vcpu->kvm->lock);
1835 return X86EMUL_CONTINUE;
1837 mutex_unlock(&vcpu->kvm->lock);
1839 vcpu->mmio_needed = 1;
1840 vcpu->mmio_phys_addr = gpa;
1841 vcpu->mmio_size = bytes;
1842 vcpu->mmio_is_write = 1;
1843 memcpy(vcpu->mmio_data, val, bytes);
1845 return X86EMUL_CONTINUE;
1848 int emulator_write_emulated(unsigned long addr,
1851 struct kvm_vcpu *vcpu)
1853 /* Crossing a page boundary? */
1854 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1857 now = -addr & ~PAGE_MASK;
1858 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1859 if (rc != X86EMUL_CONTINUE)
1865 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1867 EXPORT_SYMBOL_GPL(emulator_write_emulated);
1869 static int emulator_cmpxchg_emulated(unsigned long addr,
1873 struct kvm_vcpu *vcpu)
1875 static int reported;
1879 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1881 #ifndef CONFIG_X86_64
1882 /* guests cmpxchg8b have to be emulated atomically */
1889 down_read(&vcpu->kvm->slots_lock);
1890 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1892 if (gpa == UNMAPPED_GVA ||
1893 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1896 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
1901 down_read(¤t->mm->mmap_sem);
1902 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1903 up_read(¤t->mm->mmap_sem);
1905 kaddr = kmap_atomic(page, KM_USER0);
1906 set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val);
1907 kunmap_atomic(kaddr, KM_USER0);
1908 kvm_release_page_dirty(page);
1910 up_read(&vcpu->kvm->slots_lock);
1914 return emulator_write_emulated(addr, new, bytes, vcpu);
1917 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1919 return kvm_x86_ops->get_segment_base(vcpu, seg);
1922 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1924 return X86EMUL_CONTINUE;
1927 int emulate_clts(struct kvm_vcpu *vcpu)
1929 kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS);
1930 return X86EMUL_CONTINUE;
1933 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1935 struct kvm_vcpu *vcpu = ctxt->vcpu;
1939 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1940 return X86EMUL_CONTINUE;
1942 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1943 return X86EMUL_UNHANDLEABLE;
1947 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1949 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1952 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1954 /* FIXME: better handling */
1955 return X86EMUL_UNHANDLEABLE;
1957 return X86EMUL_CONTINUE;
1960 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1962 static int reported;
1964 unsigned long rip = vcpu->arch.rip;
1965 unsigned long rip_linear;
1967 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1972 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1974 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1975 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1978 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1980 static struct x86_emulate_ops emulate_ops = {
1981 .read_std = emulator_read_std,
1982 .read_emulated = emulator_read_emulated,
1983 .write_emulated = emulator_write_emulated,
1984 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1987 int emulate_instruction(struct kvm_vcpu *vcpu,
1988 struct kvm_run *run,
1994 struct decode_cache *c;
1996 vcpu->arch.mmio_fault_cr2 = cr2;
1997 kvm_x86_ops->cache_regs(vcpu);
1999 vcpu->mmio_is_write = 0;
2000 vcpu->arch.pio.string = 0;
2002 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
2004 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
2006 vcpu->arch.emulate_ctxt.vcpu = vcpu;
2007 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
2008 vcpu->arch.emulate_ctxt.mode =
2009 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
2010 ? X86EMUL_MODE_REAL : cs_l
2011 ? X86EMUL_MODE_PROT64 : cs_db
2012 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
2014 if (vcpu->arch.emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
2015 vcpu->arch.emulate_ctxt.cs_base = 0;
2016 vcpu->arch.emulate_ctxt.ds_base = 0;
2017 vcpu->arch.emulate_ctxt.es_base = 0;
2018 vcpu->arch.emulate_ctxt.ss_base = 0;
2020 vcpu->arch.emulate_ctxt.cs_base =
2021 get_segment_base(vcpu, VCPU_SREG_CS);
2022 vcpu->arch.emulate_ctxt.ds_base =
2023 get_segment_base(vcpu, VCPU_SREG_DS);
2024 vcpu->arch.emulate_ctxt.es_base =
2025 get_segment_base(vcpu, VCPU_SREG_ES);
2026 vcpu->arch.emulate_ctxt.ss_base =
2027 get_segment_base(vcpu, VCPU_SREG_SS);
2030 vcpu->arch.emulate_ctxt.gs_base =
2031 get_segment_base(vcpu, VCPU_SREG_GS);
2032 vcpu->arch.emulate_ctxt.fs_base =
2033 get_segment_base(vcpu, VCPU_SREG_FS);
2035 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
2037 /* Reject the instructions other than VMCALL/VMMCALL when
2038 * try to emulate invalid opcode */
2039 c = &vcpu->arch.emulate_ctxt.decode;
2040 if ((emulation_type & EMULTYPE_TRAP_UD) &&
2041 (!(c->twobyte && c->b == 0x01 &&
2042 (c->modrm_reg == 0 || c->modrm_reg == 3) &&
2043 c->modrm_mod == 3 && c->modrm_rm == 1)))
2044 return EMULATE_FAIL;
2046 ++vcpu->stat.insn_emulation;
2048 ++vcpu->stat.insn_emulation_fail;
2049 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
2050 return EMULATE_DONE;
2051 return EMULATE_FAIL;
2055 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
2057 if (vcpu->arch.pio.string)
2058 return EMULATE_DO_MMIO;
2060 if ((r || vcpu->mmio_is_write) && run) {
2061 run->exit_reason = KVM_EXIT_MMIO;
2062 run->mmio.phys_addr = vcpu->mmio_phys_addr;
2063 memcpy(run->mmio.data, vcpu->mmio_data, 8);
2064 run->mmio.len = vcpu->mmio_size;
2065 run->mmio.is_write = vcpu->mmio_is_write;
2069 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
2070 return EMULATE_DONE;
2071 if (!vcpu->mmio_needed) {
2072 kvm_report_emulation_failure(vcpu, "mmio");
2073 return EMULATE_FAIL;
2075 return EMULATE_DO_MMIO;
2078 kvm_x86_ops->decache_regs(vcpu);
2079 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
2081 if (vcpu->mmio_is_write) {
2082 vcpu->mmio_needed = 0;
2083 return EMULATE_DO_MMIO;
2086 return EMULATE_DONE;
2088 EXPORT_SYMBOL_GPL(emulate_instruction);
2090 static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
2094 for (i = 0; i < ARRAY_SIZE(vcpu->arch.pio.guest_pages); ++i)
2095 if (vcpu->arch.pio.guest_pages[i]) {
2096 kvm_release_page_dirty(vcpu->arch.pio.guest_pages[i]);
2097 vcpu->arch.pio.guest_pages[i] = NULL;
2101 static int pio_copy_data(struct kvm_vcpu *vcpu)
2103 void *p = vcpu->arch.pio_data;
2106 int nr_pages = vcpu->arch.pio.guest_pages[1] ? 2 : 1;
2108 q = vmap(vcpu->arch.pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
2111 free_pio_guest_pages(vcpu);
2114 q += vcpu->arch.pio.guest_page_offset;
2115 bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count;
2116 if (vcpu->arch.pio.in)
2117 memcpy(q, p, bytes);
2119 memcpy(p, q, bytes);
2120 q -= vcpu->arch.pio.guest_page_offset;
2122 free_pio_guest_pages(vcpu);
2126 int complete_pio(struct kvm_vcpu *vcpu)
2128 struct kvm_pio_request *io = &vcpu->arch.pio;
2132 kvm_x86_ops->cache_regs(vcpu);
2136 memcpy(&vcpu->arch.regs[VCPU_REGS_RAX], vcpu->arch.pio_data,
2140 r = pio_copy_data(vcpu);
2142 kvm_x86_ops->cache_regs(vcpu);
2149 delta *= io->cur_count;
2151 * The size of the register should really depend on
2152 * current address size.
2154 vcpu->arch.regs[VCPU_REGS_RCX] -= delta;
2160 vcpu->arch.regs[VCPU_REGS_RDI] += delta;
2162 vcpu->arch.regs[VCPU_REGS_RSI] += delta;
2165 kvm_x86_ops->decache_regs(vcpu);
2167 io->count -= io->cur_count;
2173 static void kernel_pio(struct kvm_io_device *pio_dev,
2174 struct kvm_vcpu *vcpu,
2177 /* TODO: String I/O for in kernel device */
2179 mutex_lock(&vcpu->kvm->lock);
2180 if (vcpu->arch.pio.in)
2181 kvm_iodevice_read(pio_dev, vcpu->arch.pio.port,
2182 vcpu->arch.pio.size,
2185 kvm_iodevice_write(pio_dev, vcpu->arch.pio.port,
2186 vcpu->arch.pio.size,
2188 mutex_unlock(&vcpu->kvm->lock);
2191 static void pio_string_write(struct kvm_io_device *pio_dev,
2192 struct kvm_vcpu *vcpu)
2194 struct kvm_pio_request *io = &vcpu->arch.pio;
2195 void *pd = vcpu->arch.pio_data;
2198 mutex_lock(&vcpu->kvm->lock);
2199 for (i = 0; i < io->cur_count; i++) {
2200 kvm_iodevice_write(pio_dev, io->port,
2205 mutex_unlock(&vcpu->kvm->lock);
2208 static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
2211 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
2214 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2215 int size, unsigned port)
2217 struct kvm_io_device *pio_dev;
2219 vcpu->run->exit_reason = KVM_EXIT_IO;
2220 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
2221 vcpu->run->io.size = vcpu->arch.pio.size = size;
2222 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2223 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1;
2224 vcpu->run->io.port = vcpu->arch.pio.port = port;
2225 vcpu->arch.pio.in = in;
2226 vcpu->arch.pio.string = 0;
2227 vcpu->arch.pio.down = 0;
2228 vcpu->arch.pio.guest_page_offset = 0;
2229 vcpu->arch.pio.rep = 0;
2231 kvm_x86_ops->cache_regs(vcpu);
2232 memcpy(vcpu->arch.pio_data, &vcpu->arch.regs[VCPU_REGS_RAX], 4);
2233 kvm_x86_ops->decache_regs(vcpu);
2235 kvm_x86_ops->skip_emulated_instruction(vcpu);
2237 pio_dev = vcpu_find_pio_dev(vcpu, port);
2239 kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data);
2245 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
2247 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2248 int size, unsigned long count, int down,
2249 gva_t address, int rep, unsigned port)
2251 unsigned now, in_page;
2255 struct kvm_io_device *pio_dev;
2257 vcpu->run->exit_reason = KVM_EXIT_IO;
2258 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
2259 vcpu->run->io.size = vcpu->arch.pio.size = size;
2260 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2261 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count;
2262 vcpu->run->io.port = vcpu->arch.pio.port = port;
2263 vcpu->arch.pio.in = in;
2264 vcpu->arch.pio.string = 1;
2265 vcpu->arch.pio.down = down;
2266 vcpu->arch.pio.guest_page_offset = offset_in_page(address);
2267 vcpu->arch.pio.rep = rep;
2270 kvm_x86_ops->skip_emulated_instruction(vcpu);
2275 in_page = PAGE_SIZE - offset_in_page(address);
2277 in_page = offset_in_page(address) + size;
2278 now = min(count, (unsigned long)in_page / size);
2281 * String I/O straddles page boundary. Pin two guest pages
2282 * so that we satisfy atomicity constraints. Do just one
2283 * transaction to avoid complexity.
2290 * String I/O in reverse. Yuck. Kill the guest, fix later.
2292 pr_unimpl(vcpu, "guest string pio down\n");
2293 kvm_inject_gp(vcpu, 0);
2296 vcpu->run->io.count = now;
2297 vcpu->arch.pio.cur_count = now;
2299 if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count)
2300 kvm_x86_ops->skip_emulated_instruction(vcpu);
2302 for (i = 0; i < nr_pages; ++i) {
2303 down_read(&vcpu->kvm->slots_lock);
2304 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
2305 vcpu->arch.pio.guest_pages[i] = page;
2306 up_read(&vcpu->kvm->slots_lock);
2308 kvm_inject_gp(vcpu, 0);
2309 free_pio_guest_pages(vcpu);
2314 pio_dev = vcpu_find_pio_dev(vcpu, port);
2315 if (!vcpu->arch.pio.in) {
2316 /* string PIO write */
2317 ret = pio_copy_data(vcpu);
2318 if (ret >= 0 && pio_dev) {
2319 pio_string_write(pio_dev, vcpu);
2321 if (vcpu->arch.pio.count == 0)
2325 pr_unimpl(vcpu, "no string pio read support yet, "
2326 "port %x size %d count %ld\n",
2331 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
2333 int kvm_arch_init(void *opaque)
2336 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
2339 printk(KERN_ERR "kvm: already loaded the other module\n");
2344 if (!ops->cpu_has_kvm_support()) {
2345 printk(KERN_ERR "kvm: no hardware support\n");
2349 if (ops->disabled_by_bios()) {
2350 printk(KERN_ERR "kvm: disabled by bios\n");
2355 r = kvm_mmu_module_init();
2359 kvm_init_msr_list();
2362 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2369 void kvm_arch_exit(void)
2372 kvm_mmu_module_exit();
2375 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
2377 ++vcpu->stat.halt_exits;
2378 if (irqchip_in_kernel(vcpu->kvm)) {
2379 vcpu->arch.mp_state = VCPU_MP_STATE_HALTED;
2380 kvm_vcpu_block(vcpu);
2381 if (vcpu->arch.mp_state != VCPU_MP_STATE_RUNNABLE)
2385 vcpu->run->exit_reason = KVM_EXIT_HLT;
2389 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
2391 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
2393 unsigned long nr, a0, a1, a2, a3, ret;
2395 kvm_x86_ops->cache_regs(vcpu);
2397 nr = vcpu->arch.regs[VCPU_REGS_RAX];
2398 a0 = vcpu->arch.regs[VCPU_REGS_RBX];
2399 a1 = vcpu->arch.regs[VCPU_REGS_RCX];
2400 a2 = vcpu->arch.regs[VCPU_REGS_RDX];
2401 a3 = vcpu->arch.regs[VCPU_REGS_RSI];
2403 if (!is_long_mode(vcpu)) {
2412 case KVM_HC_VAPIC_POLL_IRQ:
2419 vcpu->arch.regs[VCPU_REGS_RAX] = ret;
2420 kvm_x86_ops->decache_regs(vcpu);
2421 ++vcpu->stat.hypercalls;
2424 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
2426 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
2428 char instruction[3];
2433 * Blow out the MMU to ensure that no other VCPU has an active mapping
2434 * to ensure that the updated hypercall appears atomically across all
2437 kvm_mmu_zap_all(vcpu->kvm);
2439 kvm_x86_ops->cache_regs(vcpu);
2440 kvm_x86_ops->patch_hypercall(vcpu, instruction);
2441 if (emulator_write_emulated(vcpu->arch.rip, instruction, 3, vcpu)
2442 != X86EMUL_CONTINUE)
2448 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
2450 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
2453 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
2455 struct descriptor_table dt = { limit, base };
2457 kvm_x86_ops->set_gdt(vcpu, &dt);
2460 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
2462 struct descriptor_table dt = { limit, base };
2464 kvm_x86_ops->set_idt(vcpu, &dt);
2467 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
2468 unsigned long *rflags)
2470 kvm_lmsw(vcpu, msw);
2471 *rflags = kvm_x86_ops->get_rflags(vcpu);
2474 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
2476 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2479 return vcpu->arch.cr0;
2481 return vcpu->arch.cr2;
2483 return vcpu->arch.cr3;
2485 return vcpu->arch.cr4;
2487 return kvm_get_cr8(vcpu);
2489 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
2494 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
2495 unsigned long *rflags)
2499 kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val));
2500 *rflags = kvm_x86_ops->get_rflags(vcpu);
2503 vcpu->arch.cr2 = val;
2506 kvm_set_cr3(vcpu, val);
2509 kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val));
2512 kvm_set_cr8(vcpu, val & 0xfUL);
2515 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
2519 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
2521 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
2522 int j, nent = vcpu->arch.cpuid_nent;
2524 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
2525 /* when no next entry is found, the current entry[i] is reselected */
2526 for (j = i + 1; j == i; j = (j + 1) % nent) {
2527 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
2528 if (ej->function == e->function) {
2529 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
2533 return 0; /* silence gcc, even though control never reaches here */
2536 /* find an entry with matching function, matching index (if needed), and that
2537 * should be read next (if it's stateful) */
2538 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
2539 u32 function, u32 index)
2541 if (e->function != function)
2543 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
2545 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
2546 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
2551 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
2554 u32 function, index;
2555 struct kvm_cpuid_entry2 *e, *best;
2557 kvm_x86_ops->cache_regs(vcpu);
2558 function = vcpu->arch.regs[VCPU_REGS_RAX];
2559 index = vcpu->arch.regs[VCPU_REGS_RCX];
2560 vcpu->arch.regs[VCPU_REGS_RAX] = 0;
2561 vcpu->arch.regs[VCPU_REGS_RBX] = 0;
2562 vcpu->arch.regs[VCPU_REGS_RCX] = 0;
2563 vcpu->arch.regs[VCPU_REGS_RDX] = 0;
2565 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
2566 e = &vcpu->arch.cpuid_entries[i];
2567 if (is_matching_cpuid_entry(e, function, index)) {
2568 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
2569 move_to_next_stateful_cpuid_entry(vcpu, i);
2574 * Both basic or both extended?
2576 if (((e->function ^ function) & 0x80000000) == 0)
2577 if (!best || e->function > best->function)
2581 vcpu->arch.regs[VCPU_REGS_RAX] = best->eax;
2582 vcpu->arch.regs[VCPU_REGS_RBX] = best->ebx;
2583 vcpu->arch.regs[VCPU_REGS_RCX] = best->ecx;
2584 vcpu->arch.regs[VCPU_REGS_RDX] = best->edx;
2586 kvm_x86_ops->decache_regs(vcpu);
2587 kvm_x86_ops->skip_emulated_instruction(vcpu);
2589 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
2592 * Check if userspace requested an interrupt window, and that the
2593 * interrupt window is open.
2595 * No need to exit to userspace if we already have an interrupt queued.
2597 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2598 struct kvm_run *kvm_run)
2600 return (!vcpu->arch.irq_summary &&
2601 kvm_run->request_interrupt_window &&
2602 vcpu->arch.interrupt_window_open &&
2603 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
2606 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
2607 struct kvm_run *kvm_run)
2609 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2610 kvm_run->cr8 = kvm_get_cr8(vcpu);
2611 kvm_run->apic_base = kvm_get_apic_base(vcpu);
2612 if (irqchip_in_kernel(vcpu->kvm))
2613 kvm_run->ready_for_interrupt_injection = 1;
2615 kvm_run->ready_for_interrupt_injection =
2616 (vcpu->arch.interrupt_window_open &&
2617 vcpu->arch.irq_summary == 0);
2620 static void vapic_enter(struct kvm_vcpu *vcpu)
2622 struct kvm_lapic *apic = vcpu->arch.apic;
2625 if (!apic || !apic->vapic_addr)
2628 down_read(¤t->mm->mmap_sem);
2629 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
2630 up_read(¤t->mm->mmap_sem);
2632 vcpu->arch.apic->vapic_page = page;
2635 static void vapic_exit(struct kvm_vcpu *vcpu)
2637 struct kvm_lapic *apic = vcpu->arch.apic;
2639 if (!apic || !apic->vapic_addr)
2642 kvm_release_page_dirty(apic->vapic_page);
2643 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
2646 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2650 if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
2651 pr_debug("vcpu %d received sipi with vector # %x\n",
2652 vcpu->vcpu_id, vcpu->arch.sipi_vector);
2653 kvm_lapic_reset(vcpu);
2654 r = kvm_x86_ops->vcpu_reset(vcpu);
2657 vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
2663 if (vcpu->guest_debug.enabled)
2664 kvm_x86_ops->guest_debug_pre(vcpu);
2668 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
2669 kvm_mmu_unload(vcpu);
2671 r = kvm_mmu_reload(vcpu);
2675 if (vcpu->requests) {
2676 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
2677 __kvm_migrate_apic_timer(vcpu);
2678 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
2680 kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS;
2684 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) {
2685 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
2691 kvm_inject_pending_timer_irqs(vcpu);
2695 kvm_x86_ops->prepare_guest_switch(vcpu);
2696 kvm_load_guest_fpu(vcpu);
2698 local_irq_disable();
2700 if (need_resched()) {
2708 if (test_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) {
2715 if (signal_pending(current)) {
2719 kvm_run->exit_reason = KVM_EXIT_INTR;
2720 ++vcpu->stat.signal_exits;
2724 if (vcpu->arch.exception.pending)
2725 __queue_exception(vcpu);
2726 else if (irqchip_in_kernel(vcpu->kvm))
2727 kvm_x86_ops->inject_pending_irq(vcpu);
2729 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2731 kvm_lapic_sync_to_vapic(vcpu);
2733 vcpu->guest_mode = 1;
2737 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
2738 kvm_x86_ops->tlb_flush(vcpu);
2740 kvm_x86_ops->run(vcpu, kvm_run);
2742 vcpu->guest_mode = 0;
2748 * We must have an instruction between local_irq_enable() and
2749 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2750 * the interrupt shadow. The stat.exits increment will do nicely.
2751 * But we need to prevent reordering, hence this barrier():
2760 * Profile KVM exit RIPs:
2762 if (unlikely(prof_on == KVM_PROFILING)) {
2763 kvm_x86_ops->cache_regs(vcpu);
2764 profile_hit(KVM_PROFILING, (void *)vcpu->arch.rip);
2767 if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu))
2768 vcpu->arch.exception.pending = false;
2770 kvm_lapic_sync_from_vapic(vcpu);
2772 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2775 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2777 kvm_run->exit_reason = KVM_EXIT_INTR;
2778 ++vcpu->stat.request_irq_exits;
2781 if (!need_resched())
2791 post_kvm_run_save(vcpu, kvm_run);
2798 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2805 if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2806 kvm_vcpu_block(vcpu);
2811 if (vcpu->sigset_active)
2812 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2814 /* re-sync apic's tpr */
2815 if (!irqchip_in_kernel(vcpu->kvm))
2816 kvm_set_cr8(vcpu, kvm_run->cr8);
2818 if (vcpu->arch.pio.cur_count) {
2819 r = complete_pio(vcpu);
2823 #if CONFIG_HAS_IOMEM
2824 if (vcpu->mmio_needed) {
2825 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2826 vcpu->mmio_read_completed = 1;
2827 vcpu->mmio_needed = 0;
2828 r = emulate_instruction(vcpu, kvm_run,
2829 vcpu->arch.mmio_fault_cr2, 0,
2830 EMULTYPE_NO_DECODE);
2831 if (r == EMULATE_DO_MMIO) {
2833 * Read-modify-write. Back to userspace.
2840 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2841 kvm_x86_ops->cache_regs(vcpu);
2842 vcpu->arch.regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2843 kvm_x86_ops->decache_regs(vcpu);
2846 r = __vcpu_run(vcpu, kvm_run);
2849 if (vcpu->sigset_active)
2850 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2856 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2860 kvm_x86_ops->cache_regs(vcpu);
2862 regs->rax = vcpu->arch.regs[VCPU_REGS_RAX];
2863 regs->rbx = vcpu->arch.regs[VCPU_REGS_RBX];
2864 regs->rcx = vcpu->arch.regs[VCPU_REGS_RCX];
2865 regs->rdx = vcpu->arch.regs[VCPU_REGS_RDX];
2866 regs->rsi = vcpu->arch.regs[VCPU_REGS_RSI];
2867 regs->rdi = vcpu->arch.regs[VCPU_REGS_RDI];
2868 regs->rsp = vcpu->arch.regs[VCPU_REGS_RSP];
2869 regs->rbp = vcpu->arch.regs[VCPU_REGS_RBP];
2870 #ifdef CONFIG_X86_64
2871 regs->r8 = vcpu->arch.regs[VCPU_REGS_R8];
2872 regs->r9 = vcpu->arch.regs[VCPU_REGS_R9];
2873 regs->r10 = vcpu->arch.regs[VCPU_REGS_R10];
2874 regs->r11 = vcpu->arch.regs[VCPU_REGS_R11];
2875 regs->r12 = vcpu->arch.regs[VCPU_REGS_R12];
2876 regs->r13 = vcpu->arch.regs[VCPU_REGS_R13];
2877 regs->r14 = vcpu->arch.regs[VCPU_REGS_R14];
2878 regs->r15 = vcpu->arch.regs[VCPU_REGS_R15];
2881 regs->rip = vcpu->arch.rip;
2882 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2885 * Don't leak debug flags in case they were set for guest debugging
2887 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2888 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2895 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2899 vcpu->arch.regs[VCPU_REGS_RAX] = regs->rax;
2900 vcpu->arch.regs[VCPU_REGS_RBX] = regs->rbx;
2901 vcpu->arch.regs[VCPU_REGS_RCX] = regs->rcx;
2902 vcpu->arch.regs[VCPU_REGS_RDX] = regs->rdx;
2903 vcpu->arch.regs[VCPU_REGS_RSI] = regs->rsi;
2904 vcpu->arch.regs[VCPU_REGS_RDI] = regs->rdi;
2905 vcpu->arch.regs[VCPU_REGS_RSP] = regs->rsp;
2906 vcpu->arch.regs[VCPU_REGS_RBP] = regs->rbp;
2907 #ifdef CONFIG_X86_64
2908 vcpu->arch.regs[VCPU_REGS_R8] = regs->r8;
2909 vcpu->arch.regs[VCPU_REGS_R9] = regs->r9;
2910 vcpu->arch.regs[VCPU_REGS_R10] = regs->r10;
2911 vcpu->arch.regs[VCPU_REGS_R11] = regs->r11;
2912 vcpu->arch.regs[VCPU_REGS_R12] = regs->r12;
2913 vcpu->arch.regs[VCPU_REGS_R13] = regs->r13;
2914 vcpu->arch.regs[VCPU_REGS_R14] = regs->r14;
2915 vcpu->arch.regs[VCPU_REGS_R15] = regs->r15;
2918 vcpu->arch.rip = regs->rip;
2919 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2921 kvm_x86_ops->decache_regs(vcpu);
2928 static void get_segment(struct kvm_vcpu *vcpu,
2929 struct kvm_segment *var, int seg)
2931 kvm_x86_ops->get_segment(vcpu, var, seg);
2934 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2936 struct kvm_segment cs;
2938 get_segment(vcpu, &cs, VCPU_SREG_CS);
2942 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2944 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2945 struct kvm_sregs *sregs)
2947 struct descriptor_table dt;
2952 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2953 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2954 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2955 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2956 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2957 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2959 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2960 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2962 kvm_x86_ops->get_idt(vcpu, &dt);
2963 sregs->idt.limit = dt.limit;
2964 sregs->idt.base = dt.base;
2965 kvm_x86_ops->get_gdt(vcpu, &dt);
2966 sregs->gdt.limit = dt.limit;
2967 sregs->gdt.base = dt.base;
2969 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2970 sregs->cr0 = vcpu->arch.cr0;
2971 sregs->cr2 = vcpu->arch.cr2;
2972 sregs->cr3 = vcpu->arch.cr3;
2973 sregs->cr4 = vcpu->arch.cr4;
2974 sregs->cr8 = kvm_get_cr8(vcpu);
2975 sregs->efer = vcpu->arch.shadow_efer;
2976 sregs->apic_base = kvm_get_apic_base(vcpu);
2978 if (irqchip_in_kernel(vcpu->kvm)) {
2979 memset(sregs->interrupt_bitmap, 0,
2980 sizeof sregs->interrupt_bitmap);
2981 pending_vec = kvm_x86_ops->get_irq(vcpu);
2982 if (pending_vec >= 0)
2983 set_bit(pending_vec,
2984 (unsigned long *)sregs->interrupt_bitmap);
2986 memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending,
2987 sizeof sregs->interrupt_bitmap);
2994 static void set_segment(struct kvm_vcpu *vcpu,
2995 struct kvm_segment *var, int seg)
2997 kvm_x86_ops->set_segment(vcpu, var, seg);
3000 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
3001 struct kvm_sregs *sregs)
3003 int mmu_reset_needed = 0;
3004 int i, pending_vec, max_bits;
3005 struct descriptor_table dt;
3009 dt.limit = sregs->idt.limit;
3010 dt.base = sregs->idt.base;
3011 kvm_x86_ops->set_idt(vcpu, &dt);
3012 dt.limit = sregs->gdt.limit;
3013 dt.base = sregs->gdt.base;
3014 kvm_x86_ops->set_gdt(vcpu, &dt);
3016 vcpu->arch.cr2 = sregs->cr2;
3017 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
3018 vcpu->arch.cr3 = sregs->cr3;
3020 kvm_set_cr8(vcpu, sregs->cr8);
3022 mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer;
3023 kvm_x86_ops->set_efer(vcpu, sregs->efer);
3024 kvm_set_apic_base(vcpu, sregs->apic_base);
3026 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
3028 mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0;
3029 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
3030 vcpu->arch.cr0 = sregs->cr0;
3032 mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4;
3033 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
3034 if (!is_long_mode(vcpu) && is_pae(vcpu))
3035 load_pdptrs(vcpu, vcpu->arch.cr3);
3037 if (mmu_reset_needed)
3038 kvm_mmu_reset_context(vcpu);
3040 if (!irqchip_in_kernel(vcpu->kvm)) {
3041 memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap,
3042 sizeof vcpu->arch.irq_pending);
3043 vcpu->arch.irq_summary = 0;
3044 for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i)
3045 if (vcpu->arch.irq_pending[i])
3046 __set_bit(i, &vcpu->arch.irq_summary);
3048 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
3049 pending_vec = find_first_bit(
3050 (const unsigned long *)sregs->interrupt_bitmap,
3052 /* Only pending external irq is handled here */
3053 if (pending_vec < max_bits) {
3054 kvm_x86_ops->set_irq(vcpu, pending_vec);
3055 pr_debug("Set back pending irq %d\n",
3060 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
3061 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
3062 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
3063 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
3064 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
3065 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
3067 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
3068 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
3075 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
3076 struct kvm_debug_guest *dbg)
3082 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
3090 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
3091 * we have asm/x86/processor.h
3102 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
3103 #ifdef CONFIG_X86_64
3104 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
3106 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
3111 * Translate a guest virtual address to a guest physical address.
3113 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
3114 struct kvm_translation *tr)
3116 unsigned long vaddr = tr->linear_address;
3120 down_read(&vcpu->kvm->slots_lock);
3121 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr);
3122 up_read(&vcpu->kvm->slots_lock);
3123 tr->physical_address = gpa;
3124 tr->valid = gpa != UNMAPPED_GVA;
3132 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3134 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
3138 memcpy(fpu->fpr, fxsave->st_space, 128);
3139 fpu->fcw = fxsave->cwd;
3140 fpu->fsw = fxsave->swd;
3141 fpu->ftwx = fxsave->twd;
3142 fpu->last_opcode = fxsave->fop;
3143 fpu->last_ip = fxsave->rip;
3144 fpu->last_dp = fxsave->rdp;
3145 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
3152 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3154 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
3158 memcpy(fxsave->st_space, fpu->fpr, 128);
3159 fxsave->cwd = fpu->fcw;
3160 fxsave->swd = fpu->fsw;
3161 fxsave->twd = fpu->ftwx;
3162 fxsave->fop = fpu->last_opcode;
3163 fxsave->rip = fpu->last_ip;
3164 fxsave->rdp = fpu->last_dp;
3165 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
3172 void fx_init(struct kvm_vcpu *vcpu)
3174 unsigned after_mxcsr_mask;
3176 /* Initialize guest FPU by resetting ours and saving into guest's */
3178 fx_save(&vcpu->arch.host_fx_image);
3180 fx_save(&vcpu->arch.guest_fx_image);
3181 fx_restore(&vcpu->arch.host_fx_image);
3184 vcpu->arch.cr0 |= X86_CR0_ET;
3185 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
3186 vcpu->arch.guest_fx_image.mxcsr = 0x1f80;
3187 memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask,
3188 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
3190 EXPORT_SYMBOL_GPL(fx_init);
3192 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
3194 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
3197 vcpu->guest_fpu_loaded = 1;
3198 fx_save(&vcpu->arch.host_fx_image);
3199 fx_restore(&vcpu->arch.guest_fx_image);
3201 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
3203 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
3205 if (!vcpu->guest_fpu_loaded)
3208 vcpu->guest_fpu_loaded = 0;
3209 fx_save(&vcpu->arch.guest_fx_image);
3210 fx_restore(&vcpu->arch.host_fx_image);
3211 ++vcpu->stat.fpu_reload;
3213 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
3215 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
3217 kvm_x86_ops->vcpu_free(vcpu);
3220 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
3223 return kvm_x86_ops->vcpu_create(kvm, id);
3226 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
3230 /* We do fxsave: this must be aligned. */
3231 BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF);
3234 r = kvm_arch_vcpu_reset(vcpu);
3236 r = kvm_mmu_setup(vcpu);
3243 kvm_x86_ops->vcpu_free(vcpu);
3247 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
3250 kvm_mmu_unload(vcpu);
3253 kvm_x86_ops->vcpu_free(vcpu);
3256 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
3258 return kvm_x86_ops->vcpu_reset(vcpu);
3261 void kvm_arch_hardware_enable(void *garbage)
3263 kvm_x86_ops->hardware_enable(garbage);
3266 void kvm_arch_hardware_disable(void *garbage)
3268 kvm_x86_ops->hardware_disable(garbage);
3271 int kvm_arch_hardware_setup(void)
3273 return kvm_x86_ops->hardware_setup();
3276 void kvm_arch_hardware_unsetup(void)
3278 kvm_x86_ops->hardware_unsetup();
3281 void kvm_arch_check_processor_compat(void *rtn)
3283 kvm_x86_ops->check_processor_compatibility(rtn);
3286 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
3292 BUG_ON(vcpu->kvm == NULL);
3295 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
3296 if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
3297 vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
3299 vcpu->arch.mp_state = VCPU_MP_STATE_UNINITIALIZED;
3301 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
3306 vcpu->arch.pio_data = page_address(page);
3308 r = kvm_mmu_create(vcpu);
3310 goto fail_free_pio_data;
3312 if (irqchip_in_kernel(kvm)) {
3313 r = kvm_create_lapic(vcpu);
3315 goto fail_mmu_destroy;
3321 kvm_mmu_destroy(vcpu);
3323 free_page((unsigned long)vcpu->arch.pio_data);
3328 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
3330 kvm_free_lapic(vcpu);
3331 kvm_mmu_destroy(vcpu);
3332 free_page((unsigned long)vcpu->arch.pio_data);
3335 struct kvm *kvm_arch_create_vm(void)
3337 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
3340 return ERR_PTR(-ENOMEM);
3342 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
3347 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
3350 kvm_mmu_unload(vcpu);
3354 static void kvm_free_vcpus(struct kvm *kvm)
3359 * Unpin any mmu pages first.
3361 for (i = 0; i < KVM_MAX_VCPUS; ++i)
3363 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
3364 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
3365 if (kvm->vcpus[i]) {
3366 kvm_arch_vcpu_free(kvm->vcpus[i]);
3367 kvm->vcpus[i] = NULL;
3373 void kvm_arch_destroy_vm(struct kvm *kvm)
3375 kfree(kvm->arch.vpic);
3376 kfree(kvm->arch.vioapic);
3377 kvm_free_vcpus(kvm);
3378 kvm_free_physmem(kvm);
3382 int kvm_arch_set_memory_region(struct kvm *kvm,
3383 struct kvm_userspace_memory_region *mem,
3384 struct kvm_memory_slot old,
3387 int npages = mem->memory_size >> PAGE_SHIFT;
3388 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
3390 /*To keep backward compatibility with older userspace,
3391 *x86 needs to hanlde !user_alloc case.
3394 if (npages && !old.rmap) {
3395 down_write(¤t->mm->mmap_sem);
3396 memslot->userspace_addr = do_mmap(NULL, 0,
3398 PROT_READ | PROT_WRITE,
3399 MAP_SHARED | MAP_ANONYMOUS,
3401 up_write(¤t->mm->mmap_sem);
3403 if (IS_ERR((void *)memslot->userspace_addr))
3404 return PTR_ERR((void *)memslot->userspace_addr);
3406 if (!old.user_alloc && old.rmap) {
3409 down_write(¤t->mm->mmap_sem);
3410 ret = do_munmap(current->mm, old.userspace_addr,
3411 old.npages * PAGE_SIZE);
3412 up_write(¤t->mm->mmap_sem);
3415 "kvm_vm_ioctl_set_memory_region: "
3416 "failed to munmap memory\n");
3421 if (!kvm->arch.n_requested_mmu_pages) {
3422 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
3423 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
3426 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
3427 kvm_flush_remote_tlbs(kvm);
3432 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3434 return vcpu->arch.mp_state == VCPU_MP_STATE_RUNNABLE
3435 || vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED;
3438 static void vcpu_kick_intr(void *info)
3441 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
3442 printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
3446 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
3448 int ipi_pcpu = vcpu->cpu;
3450 if (waitqueue_active(&vcpu->wq)) {
3451 wake_up_interruptible(&vcpu->wq);
3452 ++vcpu->stat.halt_wakeup;
3454 if (vcpu->guest_mode)
3455 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);