2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 * Amit Shah <amit.shah@qumranet.com>
14 * Ben-Ami Yassour <benami@il.ibm.com>
16 * This work is licensed under the terms of the GNU GPL, version 2. See
17 * the COPYING file in the top-level directory.
21 #include <linux/kvm_host.h>
26 #include "kvm_cache_regs.h"
29 #include <linux/clocksource.h>
30 #include <linux/interrupt.h>
31 #include <linux/kvm.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/mman.h>
36 #include <linux/highmem.h>
37 #include <linux/iommu.h>
38 #include <linux/intel-iommu.h>
39 #include <linux/cpufreq.h>
40 #include <linux/user-return-notifier.h>
41 #include <linux/srcu.h>
42 #include <trace/events/kvm.h>
43 #undef TRACE_INCLUDE_FILE
44 #define CREATE_TRACE_POINTS
47 #include <asm/debugreg.h>
48 #include <asm/uaccess.h>
54 #define MAX_IO_MSRS 256
55 #define CR0_RESERVED_BITS \
56 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
57 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
58 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
59 #define CR4_RESERVED_BITS \
60 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
61 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
62 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
63 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
65 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
67 #define KVM_MAX_MCE_BANKS 32
68 #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P
71 * - enable syscall per default because its emulated by KVM
72 * - enable LME and LMA per default on 64 bit KVM
75 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
77 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
80 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
81 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
83 static void update_cr8_intercept(struct kvm_vcpu *vcpu);
84 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
85 struct kvm_cpuid_entry2 __user *entries);
87 struct kvm_x86_ops *kvm_x86_ops;
88 EXPORT_SYMBOL_GPL(kvm_x86_ops);
91 module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR);
93 #define KVM_NR_SHARED_MSRS 16
95 struct kvm_shared_msrs_global {
97 u32 msrs[KVM_NR_SHARED_MSRS];
100 struct kvm_shared_msrs {
101 struct user_return_notifier urn;
103 struct kvm_shared_msr_values {
106 } values[KVM_NR_SHARED_MSRS];
109 static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
110 static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
112 struct kvm_stats_debugfs_item debugfs_entries[] = {
113 { "pf_fixed", VCPU_STAT(pf_fixed) },
114 { "pf_guest", VCPU_STAT(pf_guest) },
115 { "tlb_flush", VCPU_STAT(tlb_flush) },
116 { "invlpg", VCPU_STAT(invlpg) },
117 { "exits", VCPU_STAT(exits) },
118 { "io_exits", VCPU_STAT(io_exits) },
119 { "mmio_exits", VCPU_STAT(mmio_exits) },
120 { "signal_exits", VCPU_STAT(signal_exits) },
121 { "irq_window", VCPU_STAT(irq_window_exits) },
122 { "nmi_window", VCPU_STAT(nmi_window_exits) },
123 { "halt_exits", VCPU_STAT(halt_exits) },
124 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
125 { "hypercalls", VCPU_STAT(hypercalls) },
126 { "request_irq", VCPU_STAT(request_irq_exits) },
127 { "irq_exits", VCPU_STAT(irq_exits) },
128 { "host_state_reload", VCPU_STAT(host_state_reload) },
129 { "efer_reload", VCPU_STAT(efer_reload) },
130 { "fpu_reload", VCPU_STAT(fpu_reload) },
131 { "insn_emulation", VCPU_STAT(insn_emulation) },
132 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
133 { "irq_injections", VCPU_STAT(irq_injections) },
134 { "nmi_injections", VCPU_STAT(nmi_injections) },
135 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
136 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
137 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
138 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
139 { "mmu_flooded", VM_STAT(mmu_flooded) },
140 { "mmu_recycled", VM_STAT(mmu_recycled) },
141 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
142 { "mmu_unsync", VM_STAT(mmu_unsync) },
143 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
144 { "largepages", VM_STAT(lpages) },
148 static void kvm_on_user_return(struct user_return_notifier *urn)
151 struct kvm_shared_msrs *locals
152 = container_of(urn, struct kvm_shared_msrs, urn);
153 struct kvm_shared_msr_values *values;
155 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
156 values = &locals->values[slot];
157 if (values->host != values->curr) {
158 wrmsrl(shared_msrs_global.msrs[slot], values->host);
159 values->curr = values->host;
162 locals->registered = false;
163 user_return_notifier_unregister(urn);
166 static void shared_msr_update(unsigned slot, u32 msr)
168 struct kvm_shared_msrs *smsr;
171 smsr = &__get_cpu_var(shared_msrs);
172 /* only read, and nobody should modify it at this time,
173 * so don't need lock */
174 if (slot >= shared_msrs_global.nr) {
175 printk(KERN_ERR "kvm: invalid MSR slot!");
178 rdmsrl_safe(msr, &value);
179 smsr->values[slot].host = value;
180 smsr->values[slot].curr = value;
183 void kvm_define_shared_msr(unsigned slot, u32 msr)
185 if (slot >= shared_msrs_global.nr)
186 shared_msrs_global.nr = slot + 1;
187 shared_msrs_global.msrs[slot] = msr;
188 /* we need ensured the shared_msr_global have been updated */
191 EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
193 static void kvm_shared_msr_cpu_online(void)
197 for (i = 0; i < shared_msrs_global.nr; ++i)
198 shared_msr_update(i, shared_msrs_global.msrs[i]);
201 void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
203 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
205 if (((value ^ smsr->values[slot].curr) & mask) == 0)
207 smsr->values[slot].curr = value;
208 wrmsrl(shared_msrs_global.msrs[slot], value);
209 if (!smsr->registered) {
210 smsr->urn.on_user_return = kvm_on_user_return;
211 user_return_notifier_register(&smsr->urn);
212 smsr->registered = true;
215 EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
217 static void drop_user_return_notifiers(void *ignore)
219 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
221 if (smsr->registered)
222 kvm_on_user_return(&smsr->urn);
225 unsigned long segment_base(u16 selector)
227 struct descriptor_table gdt;
228 struct desc_struct *d;
229 unsigned long table_base;
236 table_base = gdt.base;
238 if (selector & 4) { /* from ldt */
239 u16 ldt_selector = kvm_read_ldt();
241 table_base = segment_base(ldt_selector);
243 d = (struct desc_struct *)(table_base + (selector & ~7));
244 v = get_desc_base(d);
246 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
247 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
251 EXPORT_SYMBOL_GPL(segment_base);
253 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
255 if (irqchip_in_kernel(vcpu->kvm))
256 return vcpu->arch.apic_base;
258 return vcpu->arch.apic_base;
260 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
262 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
264 /* TODO: reserve bits check */
265 if (irqchip_in_kernel(vcpu->kvm))
266 kvm_lapic_set_base(vcpu, data);
268 vcpu->arch.apic_base = data;
270 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
272 #define EXCPT_BENIGN 0
273 #define EXCPT_CONTRIBUTORY 1
276 static int exception_class(int vector)
286 return EXCPT_CONTRIBUTORY;
293 static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
294 unsigned nr, bool has_error, u32 error_code)
299 if (!vcpu->arch.exception.pending) {
301 vcpu->arch.exception.pending = true;
302 vcpu->arch.exception.has_error_code = has_error;
303 vcpu->arch.exception.nr = nr;
304 vcpu->arch.exception.error_code = error_code;
308 /* to check exception */
309 prev_nr = vcpu->arch.exception.nr;
310 if (prev_nr == DF_VECTOR) {
311 /* triple fault -> shutdown */
312 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
315 class1 = exception_class(prev_nr);
316 class2 = exception_class(nr);
317 if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY)
318 || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) {
319 /* generate double fault per SDM Table 5-5 */
320 vcpu->arch.exception.pending = true;
321 vcpu->arch.exception.has_error_code = true;
322 vcpu->arch.exception.nr = DF_VECTOR;
323 vcpu->arch.exception.error_code = 0;
325 /* replace previous exception with a new one in a hope
326 that instruction re-execution will regenerate lost
331 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
333 kvm_multiple_exception(vcpu, nr, false, 0);
335 EXPORT_SYMBOL_GPL(kvm_queue_exception);
337 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
340 ++vcpu->stat.pf_guest;
341 vcpu->arch.cr2 = addr;
342 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
345 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
347 vcpu->arch.nmi_pending = 1;
349 EXPORT_SYMBOL_GPL(kvm_inject_nmi);
351 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
353 kvm_multiple_exception(vcpu, nr, true, error_code);
355 EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
358 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
359 * a #GP and return false.
361 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
363 if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl)
365 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
368 EXPORT_SYMBOL_GPL(kvm_require_cpl);
371 * Load the pae pdptrs. Return true is they are all valid.
373 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
375 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
376 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
379 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
381 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
382 offset * sizeof(u64), sizeof(pdpte));
387 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
388 if (is_present_gpte(pdpte[i]) &&
389 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
396 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
397 __set_bit(VCPU_EXREG_PDPTR,
398 (unsigned long *)&vcpu->arch.regs_avail);
399 __set_bit(VCPU_EXREG_PDPTR,
400 (unsigned long *)&vcpu->arch.regs_dirty);
405 EXPORT_SYMBOL_GPL(load_pdptrs);
407 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
409 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
413 if (is_long_mode(vcpu) || !is_pae(vcpu))
416 if (!test_bit(VCPU_EXREG_PDPTR,
417 (unsigned long *)&vcpu->arch.regs_avail))
420 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
423 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
429 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
434 if (cr0 & 0xffffffff00000000UL) {
435 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
436 cr0, kvm_read_cr0(vcpu));
437 kvm_inject_gp(vcpu, 0);
442 cr0 &= ~CR0_RESERVED_BITS;
444 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
445 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
446 kvm_inject_gp(vcpu, 0);
450 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
451 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
452 "and a clear PE flag\n");
453 kvm_inject_gp(vcpu, 0);
457 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
459 if ((vcpu->arch.efer & EFER_LME)) {
463 printk(KERN_DEBUG "set_cr0: #GP, start paging "
464 "in long mode while PAE is disabled\n");
465 kvm_inject_gp(vcpu, 0);
468 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
470 printk(KERN_DEBUG "set_cr0: #GP, start paging "
471 "in long mode while CS.L == 1\n");
472 kvm_inject_gp(vcpu, 0);
478 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
479 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
481 kvm_inject_gp(vcpu, 0);
487 kvm_x86_ops->set_cr0(vcpu, cr0);
488 vcpu->arch.cr0 = cr0;
490 kvm_mmu_reset_context(vcpu);
493 EXPORT_SYMBOL_GPL(kvm_set_cr0);
495 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
497 kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0ful) | (msw & 0x0f));
499 EXPORT_SYMBOL_GPL(kvm_lmsw);
501 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
503 unsigned long old_cr4 = kvm_read_cr4(vcpu);
504 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE;
506 if (cr4 & CR4_RESERVED_BITS) {
507 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
508 kvm_inject_gp(vcpu, 0);
512 if (is_long_mode(vcpu)) {
513 if (!(cr4 & X86_CR4_PAE)) {
514 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
516 kvm_inject_gp(vcpu, 0);
519 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
520 && ((cr4 ^ old_cr4) & pdptr_bits)
521 && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
522 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
523 kvm_inject_gp(vcpu, 0);
527 if (cr4 & X86_CR4_VMXE) {
528 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
529 kvm_inject_gp(vcpu, 0);
532 kvm_x86_ops->set_cr4(vcpu, cr4);
533 vcpu->arch.cr4 = cr4;
534 vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled;
535 kvm_mmu_reset_context(vcpu);
537 EXPORT_SYMBOL_GPL(kvm_set_cr4);
539 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
541 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
542 kvm_mmu_sync_roots(vcpu);
543 kvm_mmu_flush_tlb(vcpu);
547 if (is_long_mode(vcpu)) {
548 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
549 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
550 kvm_inject_gp(vcpu, 0);
555 if (cr3 & CR3_PAE_RESERVED_BITS) {
557 "set_cr3: #GP, reserved bits\n");
558 kvm_inject_gp(vcpu, 0);
561 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
562 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
564 kvm_inject_gp(vcpu, 0);
569 * We don't check reserved bits in nonpae mode, because
570 * this isn't enforced, and VMware depends on this.
575 * Does the new cr3 value map to physical memory? (Note, we
576 * catch an invalid cr3 even in real-mode, because it would
577 * cause trouble later on when we turn on paging anyway.)
579 * A real CPU would silently accept an invalid cr3 and would
580 * attempt to use it - with largely undefined (and often hard
581 * to debug) behavior on the guest side.
583 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
584 kvm_inject_gp(vcpu, 0);
586 vcpu->arch.cr3 = cr3;
587 vcpu->arch.mmu.new_cr3(vcpu);
590 EXPORT_SYMBOL_GPL(kvm_set_cr3);
592 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
594 if (cr8 & CR8_RESERVED_BITS) {
595 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
596 kvm_inject_gp(vcpu, 0);
599 if (irqchip_in_kernel(vcpu->kvm))
600 kvm_lapic_set_tpr(vcpu, cr8);
602 vcpu->arch.cr8 = cr8;
604 EXPORT_SYMBOL_GPL(kvm_set_cr8);
606 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
608 if (irqchip_in_kernel(vcpu->kvm))
609 return kvm_lapic_get_cr8(vcpu);
611 return vcpu->arch.cr8;
613 EXPORT_SYMBOL_GPL(kvm_get_cr8);
615 static inline u32 bit(int bitno)
617 return 1 << (bitno & 31);
621 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
622 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
624 * This list is modified at module load time to reflect the
625 * capabilities of the host cpu. This capabilities test skips MSRs that are
626 * kvm-specific. Those are put in the beginning of the list.
629 #define KVM_SAVE_MSRS_BEGIN 5
630 static u32 msrs_to_save[] = {
631 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
632 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
633 HV_X64_MSR_APIC_ASSIST_PAGE,
634 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
637 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
639 MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
642 static unsigned num_msrs_to_save;
644 static u32 emulated_msrs[] = {
645 MSR_IA32_MISC_ENABLE,
648 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
650 if (efer & efer_reserved_bits) {
651 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
653 kvm_inject_gp(vcpu, 0);
658 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) {
659 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
660 kvm_inject_gp(vcpu, 0);
664 if (efer & EFER_FFXSR) {
665 struct kvm_cpuid_entry2 *feat;
667 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
668 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) {
669 printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n");
670 kvm_inject_gp(vcpu, 0);
675 if (efer & EFER_SVME) {
676 struct kvm_cpuid_entry2 *feat;
678 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
679 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) {
680 printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n");
681 kvm_inject_gp(vcpu, 0);
686 kvm_x86_ops->set_efer(vcpu, efer);
689 efer |= vcpu->arch.efer & EFER_LMA;
691 vcpu->arch.efer = efer;
693 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
694 kvm_mmu_reset_context(vcpu);
697 void kvm_enable_efer_bits(u64 mask)
699 efer_reserved_bits &= ~mask;
701 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
705 * Writes msr value into into the appropriate "register".
706 * Returns 0 on success, non-0 otherwise.
707 * Assumes vcpu_load() was already called.
709 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
711 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
715 * Adapt set_msr() to msr_io()'s calling convention
717 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
719 return kvm_set_msr(vcpu, index, *data);
722 static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
725 struct pvclock_wall_clock wc;
726 struct timespec boot;
733 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
736 * The guest calculates current wall clock time by adding
737 * system time (updated by kvm_write_guest_time below) to the
738 * wall clock specified here. guest system time equals host
739 * system time for us, thus we must fill in host boot time here.
743 wc.sec = boot.tv_sec;
744 wc.nsec = boot.tv_nsec;
745 wc.version = version;
747 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
750 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
753 static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
755 uint32_t quotient, remainder;
757 /* Don't try to replace with do_div(), this one calculates
758 * "(dividend << 32) / divisor" */
760 : "=a" (quotient), "=d" (remainder)
761 : "0" (0), "1" (dividend), "r" (divisor) );
765 static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock)
767 uint64_t nsecs = 1000000000LL;
772 tps64 = tsc_khz * 1000LL;
773 while (tps64 > nsecs*2) {
778 tps32 = (uint32_t)tps64;
779 while (tps32 <= (uint32_t)nsecs) {
784 hv_clock->tsc_shift = shift;
785 hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32);
787 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
788 __func__, tsc_khz, hv_clock->tsc_shift,
789 hv_clock->tsc_to_system_mul);
792 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
794 static void kvm_write_guest_time(struct kvm_vcpu *v)
798 struct kvm_vcpu_arch *vcpu = &v->arch;
800 unsigned long this_tsc_khz;
802 if ((!vcpu->time_page))
805 this_tsc_khz = get_cpu_var(cpu_tsc_khz);
806 if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) {
807 kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock);
808 vcpu->hv_clock_tsc_khz = this_tsc_khz;
810 put_cpu_var(cpu_tsc_khz);
812 /* Keep irq disabled to prevent changes to the clock */
813 local_irq_save(flags);
814 kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp);
816 monotonic_to_bootbased(&ts);
817 local_irq_restore(flags);
819 /* With all the info we got, fill in the values */
821 vcpu->hv_clock.system_time = ts.tv_nsec +
822 (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset;
825 * The interface expects us to write an even number signaling that the
826 * update is finished. Since the guest won't see the intermediate
827 * state, we just increase by 2 at the end.
829 vcpu->hv_clock.version += 2;
831 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
833 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
834 sizeof(vcpu->hv_clock));
836 kunmap_atomic(shared_kaddr, KM_USER0);
838 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
841 static int kvm_request_guest_time_update(struct kvm_vcpu *v)
843 struct kvm_vcpu_arch *vcpu = &v->arch;
845 if (!vcpu->time_page)
847 set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests);
851 static bool msr_mtrr_valid(unsigned msr)
854 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
855 case MSR_MTRRfix64K_00000:
856 case MSR_MTRRfix16K_80000:
857 case MSR_MTRRfix16K_A0000:
858 case MSR_MTRRfix4K_C0000:
859 case MSR_MTRRfix4K_C8000:
860 case MSR_MTRRfix4K_D0000:
861 case MSR_MTRRfix4K_D8000:
862 case MSR_MTRRfix4K_E0000:
863 case MSR_MTRRfix4K_E8000:
864 case MSR_MTRRfix4K_F0000:
865 case MSR_MTRRfix4K_F8000:
866 case MSR_MTRRdefType:
867 case MSR_IA32_CR_PAT:
875 static bool valid_pat_type(unsigned t)
877 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
880 static bool valid_mtrr_type(unsigned t)
882 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
885 static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
889 if (!msr_mtrr_valid(msr))
892 if (msr == MSR_IA32_CR_PAT) {
893 for (i = 0; i < 8; i++)
894 if (!valid_pat_type((data >> (i * 8)) & 0xff))
897 } else if (msr == MSR_MTRRdefType) {
900 return valid_mtrr_type(data & 0xff);
901 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
902 for (i = 0; i < 8 ; i++)
903 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
909 return valid_mtrr_type(data & 0xff);
912 static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
914 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
916 if (!mtrr_valid(vcpu, msr, data))
919 if (msr == MSR_MTRRdefType) {
920 vcpu->arch.mtrr_state.def_type = data;
921 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
922 } else if (msr == MSR_MTRRfix64K_00000)
924 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
925 p[1 + msr - MSR_MTRRfix16K_80000] = data;
926 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
927 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
928 else if (msr == MSR_IA32_CR_PAT)
929 vcpu->arch.pat = data;
930 else { /* Variable MTRRs */
931 int idx, is_mtrr_mask;
934 idx = (msr - 0x200) / 2;
935 is_mtrr_mask = msr - 0x200 - 2 * idx;
938 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
941 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
945 kvm_mmu_reset_context(vcpu);
949 static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
951 u64 mcg_cap = vcpu->arch.mcg_cap;
952 unsigned bank_num = mcg_cap & 0xff;
955 case MSR_IA32_MCG_STATUS:
956 vcpu->arch.mcg_status = data;
958 case MSR_IA32_MCG_CTL:
959 if (!(mcg_cap & MCG_CTL_P))
961 if (data != 0 && data != ~(u64)0)
963 vcpu->arch.mcg_ctl = data;
966 if (msr >= MSR_IA32_MC0_CTL &&
967 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
968 u32 offset = msr - MSR_IA32_MC0_CTL;
969 /* only 0 or all 1s can be written to IA32_MCi_CTL */
970 if ((offset & 0x3) == 0 &&
971 data != 0 && data != ~(u64)0)
973 vcpu->arch.mce_banks[offset] = data;
981 static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
983 struct kvm *kvm = vcpu->kvm;
984 int lm = is_long_mode(vcpu);
985 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
986 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
987 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
988 : kvm->arch.xen_hvm_config.blob_size_32;
989 u32 page_num = data & ~PAGE_MASK;
990 u64 page_addr = data & PAGE_MASK;
995 if (page_num >= blob_size)
998 page = kzalloc(PAGE_SIZE, GFP_KERNEL);
1002 if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE))
1004 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
1013 static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
1015 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
1018 static bool kvm_hv_msr_partition_wide(u32 msr)
1022 case HV_X64_MSR_GUEST_OS_ID:
1023 case HV_X64_MSR_HYPERCALL:
1031 static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1033 struct kvm *kvm = vcpu->kvm;
1036 case HV_X64_MSR_GUEST_OS_ID:
1037 kvm->arch.hv_guest_os_id = data;
1038 /* setting guest os id to zero disables hypercall page */
1039 if (!kvm->arch.hv_guest_os_id)
1040 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
1042 case HV_X64_MSR_HYPERCALL: {
1047 /* if guest os id is not set hypercall should remain disabled */
1048 if (!kvm->arch.hv_guest_os_id)
1050 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1051 kvm->arch.hv_hypercall = data;
1054 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1055 addr = gfn_to_hva(kvm, gfn);
1056 if (kvm_is_error_hva(addr))
1058 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1059 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
1060 if (copy_to_user((void __user *)addr, instructions, 4))
1062 kvm->arch.hv_hypercall = data;
1066 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1067 "data 0x%llx\n", msr, data);
1073 static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1076 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1079 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1080 vcpu->arch.hv_vapic = data;
1083 addr = gfn_to_hva(vcpu->kvm, data >>
1084 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1085 if (kvm_is_error_hva(addr))
1087 if (clear_user((void __user *)addr, PAGE_SIZE))
1089 vcpu->arch.hv_vapic = data;
1092 case HV_X64_MSR_EOI:
1093 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1094 case HV_X64_MSR_ICR:
1095 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1096 case HV_X64_MSR_TPR:
1097 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1099 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1100 "data 0x%llx\n", msr, data);
1107 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1111 set_efer(vcpu, data);
1114 data &= ~(u64)0x40; /* ignore flush filter disable */
1116 pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1121 case MSR_FAM10H_MMIO_CONF_BASE:
1123 pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1128 case MSR_AMD64_NB_CFG:
1130 case MSR_IA32_DEBUGCTLMSR:
1132 /* We support the non-activated case already */
1134 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1135 /* Values other than LBR and BTF are vendor-specific,
1136 thus reserved and should throw a #GP */
1139 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1142 case MSR_IA32_UCODE_REV:
1143 case MSR_IA32_UCODE_WRITE:
1144 case MSR_VM_HSAVE_PA:
1145 case MSR_AMD64_PATCH_LOADER:
1147 case 0x200 ... 0x2ff:
1148 return set_msr_mtrr(vcpu, msr, data);
1149 case MSR_IA32_APICBASE:
1150 kvm_set_apic_base(vcpu, data);
1152 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1153 return kvm_x2apic_msr_write(vcpu, msr, data);
1154 case MSR_IA32_MISC_ENABLE:
1155 vcpu->arch.ia32_misc_enable_msr = data;
1157 case MSR_KVM_WALL_CLOCK:
1158 vcpu->kvm->arch.wall_clock = data;
1159 kvm_write_wall_clock(vcpu->kvm, data);
1161 case MSR_KVM_SYSTEM_TIME: {
1162 if (vcpu->arch.time_page) {
1163 kvm_release_page_dirty(vcpu->arch.time_page);
1164 vcpu->arch.time_page = NULL;
1167 vcpu->arch.time = data;
1169 /* we verify if the enable bit is set... */
1173 /* ...but clean it before doing the actual write */
1174 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1176 vcpu->arch.time_page =
1177 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
1179 if (is_error_page(vcpu->arch.time_page)) {
1180 kvm_release_page_clean(vcpu->arch.time_page);
1181 vcpu->arch.time_page = NULL;
1184 kvm_request_guest_time_update(vcpu);
1187 case MSR_IA32_MCG_CTL:
1188 case MSR_IA32_MCG_STATUS:
1189 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1190 return set_msr_mce(vcpu, msr, data);
1192 /* Performance counters are not protected by a CPUID bit,
1193 * so we should check all of them in the generic path for the sake of
1194 * cross vendor migration.
1195 * Writing a zero into the event select MSRs disables them,
1196 * which we perfectly emulate ;-). Any other value should be at least
1197 * reported, some guests depend on them.
1199 case MSR_P6_EVNTSEL0:
1200 case MSR_P6_EVNTSEL1:
1201 case MSR_K7_EVNTSEL0:
1202 case MSR_K7_EVNTSEL1:
1203 case MSR_K7_EVNTSEL2:
1204 case MSR_K7_EVNTSEL3:
1206 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1207 "0x%x data 0x%llx\n", msr, data);
1209 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1210 * so we ignore writes to make it happy.
1212 case MSR_P6_PERFCTR0:
1213 case MSR_P6_PERFCTR1:
1214 case MSR_K7_PERFCTR0:
1215 case MSR_K7_PERFCTR1:
1216 case MSR_K7_PERFCTR2:
1217 case MSR_K7_PERFCTR3:
1218 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1219 "0x%x data 0x%llx\n", msr, data);
1221 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1222 if (kvm_hv_msr_partition_wide(msr)) {
1224 mutex_lock(&vcpu->kvm->lock);
1225 r = set_msr_hyperv_pw(vcpu, msr, data);
1226 mutex_unlock(&vcpu->kvm->lock);
1229 return set_msr_hyperv(vcpu, msr, data);
1232 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1233 return xen_hvm_config(vcpu, data);
1235 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1239 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1246 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1250 * Reads an msr value (of 'msr_index') into 'pdata'.
1251 * Returns 0 on success, non-0 otherwise.
1252 * Assumes vcpu_load() was already called.
1254 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1256 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1259 static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1261 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1263 if (!msr_mtrr_valid(msr))
1266 if (msr == MSR_MTRRdefType)
1267 *pdata = vcpu->arch.mtrr_state.def_type +
1268 (vcpu->arch.mtrr_state.enabled << 10);
1269 else if (msr == MSR_MTRRfix64K_00000)
1271 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1272 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1273 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1274 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1275 else if (msr == MSR_IA32_CR_PAT)
1276 *pdata = vcpu->arch.pat;
1277 else { /* Variable MTRRs */
1278 int idx, is_mtrr_mask;
1281 idx = (msr - 0x200) / 2;
1282 is_mtrr_mask = msr - 0x200 - 2 * idx;
1285 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1288 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1295 static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1298 u64 mcg_cap = vcpu->arch.mcg_cap;
1299 unsigned bank_num = mcg_cap & 0xff;
1302 case MSR_IA32_P5_MC_ADDR:
1303 case MSR_IA32_P5_MC_TYPE:
1306 case MSR_IA32_MCG_CAP:
1307 data = vcpu->arch.mcg_cap;
1309 case MSR_IA32_MCG_CTL:
1310 if (!(mcg_cap & MCG_CTL_P))
1312 data = vcpu->arch.mcg_ctl;
1314 case MSR_IA32_MCG_STATUS:
1315 data = vcpu->arch.mcg_status;
1318 if (msr >= MSR_IA32_MC0_CTL &&
1319 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1320 u32 offset = msr - MSR_IA32_MC0_CTL;
1321 data = vcpu->arch.mce_banks[offset];
1330 static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1333 struct kvm *kvm = vcpu->kvm;
1336 case HV_X64_MSR_GUEST_OS_ID:
1337 data = kvm->arch.hv_guest_os_id;
1339 case HV_X64_MSR_HYPERCALL:
1340 data = kvm->arch.hv_hypercall;
1343 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1351 static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1356 case HV_X64_MSR_VP_INDEX: {
1359 kvm_for_each_vcpu(r, v, vcpu->kvm)
1364 case HV_X64_MSR_EOI:
1365 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1366 case HV_X64_MSR_ICR:
1367 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1368 case HV_X64_MSR_TPR:
1369 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
1371 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1378 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1383 case MSR_IA32_PLATFORM_ID:
1384 case MSR_IA32_UCODE_REV:
1385 case MSR_IA32_EBL_CR_POWERON:
1386 case MSR_IA32_DEBUGCTLMSR:
1387 case MSR_IA32_LASTBRANCHFROMIP:
1388 case MSR_IA32_LASTBRANCHTOIP:
1389 case MSR_IA32_LASTINTFROMIP:
1390 case MSR_IA32_LASTINTTOIP:
1393 case MSR_VM_HSAVE_PA:
1394 case MSR_P6_PERFCTR0:
1395 case MSR_P6_PERFCTR1:
1396 case MSR_P6_EVNTSEL0:
1397 case MSR_P6_EVNTSEL1:
1398 case MSR_K7_EVNTSEL0:
1399 case MSR_K7_PERFCTR0:
1400 case MSR_K8_INT_PENDING_MSG:
1401 case MSR_AMD64_NB_CFG:
1402 case MSR_FAM10H_MMIO_CONF_BASE:
1406 data = 0x500 | KVM_NR_VAR_MTRR;
1408 case 0x200 ... 0x2ff:
1409 return get_msr_mtrr(vcpu, msr, pdata);
1410 case 0xcd: /* fsb frequency */
1413 case MSR_IA32_APICBASE:
1414 data = kvm_get_apic_base(vcpu);
1416 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1417 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1419 case MSR_IA32_MISC_ENABLE:
1420 data = vcpu->arch.ia32_misc_enable_msr;
1422 case MSR_IA32_PERF_STATUS:
1423 /* TSC increment by tick */
1425 /* CPU multiplier */
1426 data |= (((uint64_t)4ULL) << 40);
1429 data = vcpu->arch.efer;
1431 case MSR_KVM_WALL_CLOCK:
1432 data = vcpu->kvm->arch.wall_clock;
1434 case MSR_KVM_SYSTEM_TIME:
1435 data = vcpu->arch.time;
1437 case MSR_IA32_P5_MC_ADDR:
1438 case MSR_IA32_P5_MC_TYPE:
1439 case MSR_IA32_MCG_CAP:
1440 case MSR_IA32_MCG_CTL:
1441 case MSR_IA32_MCG_STATUS:
1442 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1443 return get_msr_mce(vcpu, msr, pdata);
1444 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1445 if (kvm_hv_msr_partition_wide(msr)) {
1447 mutex_lock(&vcpu->kvm->lock);
1448 r = get_msr_hyperv_pw(vcpu, msr, pdata);
1449 mutex_unlock(&vcpu->kvm->lock);
1452 return get_msr_hyperv(vcpu, msr, pdata);
1456 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
1459 pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
1467 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1470 * Read or write a bunch of msrs. All parameters are kernel addresses.
1472 * @return number of msrs set successfully.
1474 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
1475 struct kvm_msr_entry *entries,
1476 int (*do_msr)(struct kvm_vcpu *vcpu,
1477 unsigned index, u64 *data))
1483 idx = srcu_read_lock(&vcpu->kvm->srcu);
1484 for (i = 0; i < msrs->nmsrs; ++i)
1485 if (do_msr(vcpu, entries[i].index, &entries[i].data))
1487 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1495 * Read or write a bunch of msrs. Parameters are user addresses.
1497 * @return number of msrs set successfully.
1499 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
1500 int (*do_msr)(struct kvm_vcpu *vcpu,
1501 unsigned index, u64 *data),
1504 struct kvm_msrs msrs;
1505 struct kvm_msr_entry *entries;
1510 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
1514 if (msrs.nmsrs >= MAX_IO_MSRS)
1518 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
1519 entries = vmalloc(size);
1524 if (copy_from_user(entries, user_msrs->entries, size))
1527 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
1532 if (writeback && copy_to_user(user_msrs->entries, entries, size))
1543 int kvm_dev_ioctl_check_extension(long ext)
1548 case KVM_CAP_IRQCHIP:
1550 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
1551 case KVM_CAP_SET_TSS_ADDR:
1552 case KVM_CAP_EXT_CPUID:
1553 case KVM_CAP_CLOCKSOURCE:
1555 case KVM_CAP_NOP_IO_DELAY:
1556 case KVM_CAP_MP_STATE:
1557 case KVM_CAP_SYNC_MMU:
1558 case KVM_CAP_REINJECT_CONTROL:
1559 case KVM_CAP_IRQ_INJECT_STATUS:
1560 case KVM_CAP_ASSIGN_DEV_IRQ:
1562 case KVM_CAP_IOEVENTFD:
1564 case KVM_CAP_PIT_STATE2:
1565 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
1566 case KVM_CAP_XEN_HVM:
1567 case KVM_CAP_ADJUST_CLOCK:
1568 case KVM_CAP_VCPU_EVENTS:
1569 case KVM_CAP_HYPERV:
1570 case KVM_CAP_HYPERV_VAPIC:
1571 case KVM_CAP_HYPERV_SPIN:
1572 case KVM_CAP_PCI_SEGMENT:
1575 case KVM_CAP_COALESCED_MMIO:
1576 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
1579 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
1581 case KVM_CAP_NR_VCPUS:
1584 case KVM_CAP_NR_MEMSLOTS:
1585 r = KVM_MEMORY_SLOTS;
1587 case KVM_CAP_PV_MMU: /* obsolete */
1594 r = KVM_MAX_MCE_BANKS;
1604 long kvm_arch_dev_ioctl(struct file *filp,
1605 unsigned int ioctl, unsigned long arg)
1607 void __user *argp = (void __user *)arg;
1611 case KVM_GET_MSR_INDEX_LIST: {
1612 struct kvm_msr_list __user *user_msr_list = argp;
1613 struct kvm_msr_list msr_list;
1617 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
1620 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
1621 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
1624 if (n < msr_list.nmsrs)
1627 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
1628 num_msrs_to_save * sizeof(u32)))
1630 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
1632 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
1637 case KVM_GET_SUPPORTED_CPUID: {
1638 struct kvm_cpuid2 __user *cpuid_arg = argp;
1639 struct kvm_cpuid2 cpuid;
1642 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1644 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
1645 cpuid_arg->entries);
1650 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1655 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
1658 mce_cap = KVM_MCE_CAP_SUPPORTED;
1660 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
1672 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1674 kvm_x86_ops->vcpu_load(vcpu, cpu);
1675 if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) {
1676 unsigned long khz = cpufreq_quick_get(cpu);
1679 per_cpu(cpu_tsc_khz, cpu) = khz;
1681 kvm_request_guest_time_update(vcpu);
1684 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1686 kvm_put_guest_fpu(vcpu);
1687 kvm_x86_ops->vcpu_put(vcpu);
1690 static int is_efer_nx(void)
1692 unsigned long long efer = 0;
1694 rdmsrl_safe(MSR_EFER, &efer);
1695 return efer & EFER_NX;
1698 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
1701 struct kvm_cpuid_entry2 *e, *entry;
1704 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
1705 e = &vcpu->arch.cpuid_entries[i];
1706 if (e->function == 0x80000001) {
1711 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
1712 entry->edx &= ~(1 << 20);
1713 printk(KERN_INFO "kvm: guest NX capability removed\n");
1717 /* when an old userspace process fills a new kernel module */
1718 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
1719 struct kvm_cpuid *cpuid,
1720 struct kvm_cpuid_entry __user *entries)
1723 struct kvm_cpuid_entry *cpuid_entries;
1726 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1729 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
1733 if (copy_from_user(cpuid_entries, entries,
1734 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
1736 for (i = 0; i < cpuid->nent; i++) {
1737 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
1738 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
1739 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
1740 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
1741 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
1742 vcpu->arch.cpuid_entries[i].index = 0;
1743 vcpu->arch.cpuid_entries[i].flags = 0;
1744 vcpu->arch.cpuid_entries[i].padding[0] = 0;
1745 vcpu->arch.cpuid_entries[i].padding[1] = 0;
1746 vcpu->arch.cpuid_entries[i].padding[2] = 0;
1748 vcpu->arch.cpuid_nent = cpuid->nent;
1749 cpuid_fix_nx_cap(vcpu);
1751 kvm_apic_set_version(vcpu);
1752 kvm_x86_ops->cpuid_update(vcpu);
1755 vfree(cpuid_entries);
1760 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
1761 struct kvm_cpuid2 *cpuid,
1762 struct kvm_cpuid_entry2 __user *entries)
1767 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1770 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
1771 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
1773 vcpu->arch.cpuid_nent = cpuid->nent;
1774 kvm_apic_set_version(vcpu);
1775 kvm_x86_ops->cpuid_update(vcpu);
1782 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
1783 struct kvm_cpuid2 *cpuid,
1784 struct kvm_cpuid_entry2 __user *entries)
1789 if (cpuid->nent < vcpu->arch.cpuid_nent)
1792 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
1793 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
1798 cpuid->nent = vcpu->arch.cpuid_nent;
1802 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1805 entry->function = function;
1806 entry->index = index;
1807 cpuid_count(entry->function, entry->index,
1808 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
1812 #define F(x) bit(X86_FEATURE_##x)
1814 static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1815 u32 index, int *nent, int maxnent)
1817 unsigned f_nx = is_efer_nx() ? F(NX) : 0;
1818 #ifdef CONFIG_X86_64
1819 unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL)
1821 unsigned f_lm = F(LM);
1823 unsigned f_gbpages = 0;
1826 unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
1829 const u32 kvm_supported_word0_x86_features =
1830 F(FPU) | F(VME) | F(DE) | F(PSE) |
1831 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1832 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
1833 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1834 F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) |
1835 0 /* Reserved, DS, ACPI */ | F(MMX) |
1836 F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
1837 0 /* HTT, TM, Reserved, PBE */;
1838 /* cpuid 0x80000001.edx */
1839 const u32 kvm_supported_word1_x86_features =
1840 F(FPU) | F(VME) | F(DE) | F(PSE) |
1841 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1842 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) |
1843 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1844 F(PAT) | F(PSE36) | 0 /* Reserved */ |
1845 f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) |
1846 F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp |
1847 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW);
1849 const u32 kvm_supported_word4_x86_features =
1850 F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ |
1851 0 /* DS-CPL, VMX, SMX, EST */ |
1852 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
1853 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ |
1854 0 /* Reserved, DCA */ | F(XMM4_1) |
1855 F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
1856 0 /* Reserved, XSAVE, OSXSAVE */;
1857 /* cpuid 0x80000001.ecx */
1858 const u32 kvm_supported_word6_x86_features =
1859 F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ |
1860 F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
1861 F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) |
1862 0 /* SKINIT */ | 0 /* WDT */;
1864 /* all calls to cpuid_count() should be made on the same cpu */
1866 do_cpuid_1_ent(entry, function, index);
1871 entry->eax = min(entry->eax, (u32)0xb);
1874 entry->edx &= kvm_supported_word0_x86_features;
1875 entry->ecx &= kvm_supported_word4_x86_features;
1876 /* we support x2apic emulation even if host does not support
1877 * it since we emulate x2apic in software */
1878 entry->ecx |= F(X2APIC);
1880 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1881 * may return different values. This forces us to get_cpu() before
1882 * issuing the first command, and also to emulate this annoying behavior
1883 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1885 int t, times = entry->eax & 0xff;
1887 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1888 entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
1889 for (t = 1; t < times && *nent < maxnent; ++t) {
1890 do_cpuid_1_ent(&entry[t], function, 0);
1891 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1896 /* function 4 and 0xb have additional index. */
1900 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1901 /* read more entries until cache_type is zero */
1902 for (i = 1; *nent < maxnent; ++i) {
1903 cache_type = entry[i - 1].eax & 0x1f;
1906 do_cpuid_1_ent(&entry[i], function, i);
1908 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1916 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1917 /* read more entries until level_type is zero */
1918 for (i = 1; *nent < maxnent; ++i) {
1919 level_type = entry[i - 1].ecx & 0xff00;
1922 do_cpuid_1_ent(&entry[i], function, i);
1924 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1930 entry->eax = min(entry->eax, 0x8000001a);
1933 entry->edx &= kvm_supported_word1_x86_features;
1934 entry->ecx &= kvm_supported_word6_x86_features;
1942 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
1943 struct kvm_cpuid_entry2 __user *entries)
1945 struct kvm_cpuid_entry2 *cpuid_entries;
1946 int limit, nent = 0, r = -E2BIG;
1949 if (cpuid->nent < 1)
1951 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1952 cpuid->nent = KVM_MAX_CPUID_ENTRIES;
1954 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
1958 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
1959 limit = cpuid_entries[0].eax;
1960 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
1961 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1962 &nent, cpuid->nent);
1964 if (nent >= cpuid->nent)
1967 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
1968 limit = cpuid_entries[nent - 1].eax;
1969 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
1970 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1971 &nent, cpuid->nent);
1973 if (nent >= cpuid->nent)
1977 if (copy_to_user(entries, cpuid_entries,
1978 nent * sizeof(struct kvm_cpuid_entry2)))
1984 vfree(cpuid_entries);
1989 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
1990 struct kvm_lapic_state *s)
1993 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
1999 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2000 struct kvm_lapic_state *s)
2003 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
2004 kvm_apic_post_state_restore(vcpu);
2005 update_cr8_intercept(vcpu);
2011 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2012 struct kvm_interrupt *irq)
2014 if (irq->irq < 0 || irq->irq >= 256)
2016 if (irqchip_in_kernel(vcpu->kvm))
2020 kvm_queue_interrupt(vcpu, irq->irq, false);
2027 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
2030 kvm_inject_nmi(vcpu);
2036 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
2037 struct kvm_tpr_access_ctl *tac)
2041 vcpu->arch.tpr_access_reporting = !!tac->enabled;
2045 static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
2049 unsigned bank_num = mcg_cap & 0xff, bank;
2052 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
2054 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2057 vcpu->arch.mcg_cap = mcg_cap;
2058 /* Init IA32_MCG_CTL to all 1s */
2059 if (mcg_cap & MCG_CTL_P)
2060 vcpu->arch.mcg_ctl = ~(u64)0;
2061 /* Init IA32_MCi_CTL to all 1s */
2062 for (bank = 0; bank < bank_num; bank++)
2063 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2068 static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2069 struct kvm_x86_mce *mce)
2071 u64 mcg_cap = vcpu->arch.mcg_cap;
2072 unsigned bank_num = mcg_cap & 0xff;
2073 u64 *banks = vcpu->arch.mce_banks;
2075 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2078 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2079 * reporting is disabled
2081 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2082 vcpu->arch.mcg_ctl != ~(u64)0)
2084 banks += 4 * mce->bank;
2086 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2087 * reporting is disabled for the bank
2089 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2091 if (mce->status & MCI_STATUS_UC) {
2092 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
2093 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
2094 printk(KERN_DEBUG "kvm: set_mce: "
2095 "injects mce exception while "
2096 "previous one is in progress!\n");
2097 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
2100 if (banks[1] & MCI_STATUS_VAL)
2101 mce->status |= MCI_STATUS_OVER;
2102 banks[2] = mce->addr;
2103 banks[3] = mce->misc;
2104 vcpu->arch.mcg_status = mce->mcg_status;
2105 banks[1] = mce->status;
2106 kvm_queue_exception(vcpu, MC_VECTOR);
2107 } else if (!(banks[1] & MCI_STATUS_VAL)
2108 || !(banks[1] & MCI_STATUS_UC)) {
2109 if (banks[1] & MCI_STATUS_VAL)
2110 mce->status |= MCI_STATUS_OVER;
2111 banks[2] = mce->addr;
2112 banks[3] = mce->misc;
2113 banks[1] = mce->status;
2115 banks[1] |= MCI_STATUS_OVER;
2119 static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2120 struct kvm_vcpu_events *events)
2124 events->exception.injected = vcpu->arch.exception.pending;
2125 events->exception.nr = vcpu->arch.exception.nr;
2126 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
2127 events->exception.error_code = vcpu->arch.exception.error_code;
2129 events->interrupt.injected = vcpu->arch.interrupt.pending;
2130 events->interrupt.nr = vcpu->arch.interrupt.nr;
2131 events->interrupt.soft = vcpu->arch.interrupt.soft;
2133 events->nmi.injected = vcpu->arch.nmi_injected;
2134 events->nmi.pending = vcpu->arch.nmi_pending;
2135 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
2137 events->sipi_vector = vcpu->arch.sipi_vector;
2139 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
2140 | KVM_VCPUEVENT_VALID_SIPI_VECTOR);
2145 static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2146 struct kvm_vcpu_events *events)
2148 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
2149 | KVM_VCPUEVENT_VALID_SIPI_VECTOR))
2154 vcpu->arch.exception.pending = events->exception.injected;
2155 vcpu->arch.exception.nr = events->exception.nr;
2156 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2157 vcpu->arch.exception.error_code = events->exception.error_code;
2159 vcpu->arch.interrupt.pending = events->interrupt.injected;
2160 vcpu->arch.interrupt.nr = events->interrupt.nr;
2161 vcpu->arch.interrupt.soft = events->interrupt.soft;
2162 if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm))
2163 kvm_pic_clear_isr_ack(vcpu->kvm);
2165 vcpu->arch.nmi_injected = events->nmi.injected;
2166 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2167 vcpu->arch.nmi_pending = events->nmi.pending;
2168 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2170 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2171 vcpu->arch.sipi_vector = events->sipi_vector;
2178 long kvm_arch_vcpu_ioctl(struct file *filp,
2179 unsigned int ioctl, unsigned long arg)
2181 struct kvm_vcpu *vcpu = filp->private_data;
2182 void __user *argp = (void __user *)arg;
2184 struct kvm_lapic_state *lapic = NULL;
2187 case KVM_GET_LAPIC: {
2189 if (!vcpu->arch.apic)
2191 lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2196 r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic);
2200 if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state)))
2205 case KVM_SET_LAPIC: {
2207 if (!vcpu->arch.apic)
2209 lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2214 if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state)))
2216 r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic);
2222 case KVM_INTERRUPT: {
2223 struct kvm_interrupt irq;
2226 if (copy_from_user(&irq, argp, sizeof irq))
2228 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2235 r = kvm_vcpu_ioctl_nmi(vcpu);
2241 case KVM_SET_CPUID: {
2242 struct kvm_cpuid __user *cpuid_arg = argp;
2243 struct kvm_cpuid cpuid;
2246 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2248 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2253 case KVM_SET_CPUID2: {
2254 struct kvm_cpuid2 __user *cpuid_arg = argp;
2255 struct kvm_cpuid2 cpuid;
2258 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2260 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
2261 cpuid_arg->entries);
2266 case KVM_GET_CPUID2: {
2267 struct kvm_cpuid2 __user *cpuid_arg = argp;
2268 struct kvm_cpuid2 cpuid;
2271 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2273 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
2274 cpuid_arg->entries);
2278 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2284 r = msr_io(vcpu, argp, kvm_get_msr, 1);
2287 r = msr_io(vcpu, argp, do_set_msr, 0);
2289 case KVM_TPR_ACCESS_REPORTING: {
2290 struct kvm_tpr_access_ctl tac;
2293 if (copy_from_user(&tac, argp, sizeof tac))
2295 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
2299 if (copy_to_user(argp, &tac, sizeof tac))
2304 case KVM_SET_VAPIC_ADDR: {
2305 struct kvm_vapic_addr va;
2308 if (!irqchip_in_kernel(vcpu->kvm))
2311 if (copy_from_user(&va, argp, sizeof va))
2314 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
2317 case KVM_X86_SETUP_MCE: {
2321 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
2323 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
2326 case KVM_X86_SET_MCE: {
2327 struct kvm_x86_mce mce;
2330 if (copy_from_user(&mce, argp, sizeof mce))
2332 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
2335 case KVM_GET_VCPU_EVENTS: {
2336 struct kvm_vcpu_events events;
2338 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
2341 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
2346 case KVM_SET_VCPU_EVENTS: {
2347 struct kvm_vcpu_events events;
2350 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
2353 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
2364 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
2368 if (addr > (unsigned int)(-3 * PAGE_SIZE))
2370 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
2374 static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
2377 kvm->arch.ept_identity_map_addr = ident_addr;
2381 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
2382 u32 kvm_nr_mmu_pages)
2384 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
2387 mutex_lock(&kvm->slots_lock);
2388 spin_lock(&kvm->mmu_lock);
2390 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
2391 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
2393 spin_unlock(&kvm->mmu_lock);
2394 mutex_unlock(&kvm->slots_lock);
2398 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
2400 return kvm->arch.n_alloc_mmu_pages;
2403 gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn)
2406 struct kvm_mem_alias *alias;
2407 struct kvm_mem_aliases *aliases;
2409 aliases = rcu_dereference(kvm->arch.aliases);
2411 for (i = 0; i < aliases->naliases; ++i) {
2412 alias = &aliases->aliases[i];
2413 if (alias->flags & KVM_ALIAS_INVALID)
2415 if (gfn >= alias->base_gfn
2416 && gfn < alias->base_gfn + alias->npages)
2417 return alias->target_gfn + gfn - alias->base_gfn;
2422 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
2425 struct kvm_mem_alias *alias;
2426 struct kvm_mem_aliases *aliases;
2428 aliases = rcu_dereference(kvm->arch.aliases);
2430 for (i = 0; i < aliases->naliases; ++i) {
2431 alias = &aliases->aliases[i];
2432 if (gfn >= alias->base_gfn
2433 && gfn < alias->base_gfn + alias->npages)
2434 return alias->target_gfn + gfn - alias->base_gfn;
2440 * Set a new alias region. Aliases map a portion of physical memory into
2441 * another portion. This is useful for memory windows, for example the PC
2444 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
2445 struct kvm_memory_alias *alias)
2448 struct kvm_mem_alias *p;
2449 struct kvm_mem_aliases *aliases, *old_aliases;
2452 /* General sanity checks */
2453 if (alias->memory_size & (PAGE_SIZE - 1))
2455 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
2457 if (alias->slot >= KVM_ALIAS_SLOTS)
2459 if (alias->guest_phys_addr + alias->memory_size
2460 < alias->guest_phys_addr)
2462 if (alias->target_phys_addr + alias->memory_size
2463 < alias->target_phys_addr)
2467 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2471 mutex_lock(&kvm->slots_lock);
2473 /* invalidate any gfn reference in case of deletion/shrinking */
2474 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2475 aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID;
2476 old_aliases = kvm->arch.aliases;
2477 rcu_assign_pointer(kvm->arch.aliases, aliases);
2478 synchronize_srcu_expedited(&kvm->srcu);
2479 kvm_mmu_zap_all(kvm);
2483 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2487 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2489 p = &aliases->aliases[alias->slot];
2490 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
2491 p->npages = alias->memory_size >> PAGE_SHIFT;
2492 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
2493 p->flags &= ~(KVM_ALIAS_INVALID);
2495 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
2496 if (aliases->aliases[n - 1].npages)
2498 aliases->naliases = n;
2500 old_aliases = kvm->arch.aliases;
2501 rcu_assign_pointer(kvm->arch.aliases, aliases);
2502 synchronize_srcu_expedited(&kvm->srcu);
2507 mutex_unlock(&kvm->slots_lock);
2512 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2517 switch (chip->chip_id) {
2518 case KVM_IRQCHIP_PIC_MASTER:
2519 memcpy(&chip->chip.pic,
2520 &pic_irqchip(kvm)->pics[0],
2521 sizeof(struct kvm_pic_state));
2523 case KVM_IRQCHIP_PIC_SLAVE:
2524 memcpy(&chip->chip.pic,
2525 &pic_irqchip(kvm)->pics[1],
2526 sizeof(struct kvm_pic_state));
2528 case KVM_IRQCHIP_IOAPIC:
2529 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
2538 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2543 switch (chip->chip_id) {
2544 case KVM_IRQCHIP_PIC_MASTER:
2545 raw_spin_lock(&pic_irqchip(kvm)->lock);
2546 memcpy(&pic_irqchip(kvm)->pics[0],
2548 sizeof(struct kvm_pic_state));
2549 raw_spin_unlock(&pic_irqchip(kvm)->lock);
2551 case KVM_IRQCHIP_PIC_SLAVE:
2552 raw_spin_lock(&pic_irqchip(kvm)->lock);
2553 memcpy(&pic_irqchip(kvm)->pics[1],
2555 sizeof(struct kvm_pic_state));
2556 raw_spin_unlock(&pic_irqchip(kvm)->lock);
2558 case KVM_IRQCHIP_IOAPIC:
2559 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
2565 kvm_pic_update_irq(pic_irqchip(kvm));
2569 static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2573 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2574 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
2575 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2579 static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2583 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2584 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
2585 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
2586 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2590 static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2594 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2595 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
2596 sizeof(ps->channels));
2597 ps->flags = kvm->arch.vpit->pit_state.flags;
2598 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2602 static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2604 int r = 0, start = 0;
2605 u32 prev_legacy, cur_legacy;
2606 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2607 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
2608 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
2609 if (!prev_legacy && cur_legacy)
2611 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
2612 sizeof(kvm->arch.vpit->pit_state.channels));
2613 kvm->arch.vpit->pit_state.flags = ps->flags;
2614 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
2615 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2619 static int kvm_vm_ioctl_reinject(struct kvm *kvm,
2620 struct kvm_reinject_control *control)
2622 if (!kvm->arch.vpit)
2624 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2625 kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
2626 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2631 * Get (and clear) the dirty memory log for a memory slot.
2633 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
2634 struct kvm_dirty_log *log)
2637 struct kvm_memory_slot *memslot;
2638 unsigned long is_dirty = 0;
2639 unsigned long *dirty_bitmap = NULL;
2641 mutex_lock(&kvm->slots_lock);
2644 if (log->slot >= KVM_MEMORY_SLOTS)
2647 memslot = &kvm->memslots->memslots[log->slot];
2649 if (!memslot->dirty_bitmap)
2652 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
2655 dirty_bitmap = vmalloc(n);
2658 memset(dirty_bitmap, 0, n);
2660 for (i = 0; !is_dirty && i < n/sizeof(long); i++)
2661 is_dirty = memslot->dirty_bitmap[i];
2663 /* If nothing is dirty, don't bother messing with page tables. */
2665 struct kvm_memslots *slots, *old_slots;
2667 spin_lock(&kvm->mmu_lock);
2668 kvm_mmu_slot_remove_write_access(kvm, log->slot);
2669 spin_unlock(&kvm->mmu_lock);
2671 slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
2675 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
2676 slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
2678 old_slots = kvm->memslots;
2679 rcu_assign_pointer(kvm->memslots, slots);
2680 synchronize_srcu_expedited(&kvm->srcu);
2681 dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap;
2686 if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
2689 vfree(dirty_bitmap);
2691 mutex_unlock(&kvm->slots_lock);
2695 long kvm_arch_vm_ioctl(struct file *filp,
2696 unsigned int ioctl, unsigned long arg)
2698 struct kvm *kvm = filp->private_data;
2699 void __user *argp = (void __user *)arg;
2702 * This union makes it completely explicit to gcc-3.x
2703 * that these two variables' stack usage should be
2704 * combined, not added together.
2707 struct kvm_pit_state ps;
2708 struct kvm_pit_state2 ps2;
2709 struct kvm_memory_alias alias;
2710 struct kvm_pit_config pit_config;
2714 case KVM_SET_TSS_ADDR:
2715 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
2719 case KVM_SET_IDENTITY_MAP_ADDR: {
2723 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
2725 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
2730 case KVM_SET_MEMORY_REGION: {
2731 struct kvm_memory_region kvm_mem;
2732 struct kvm_userspace_memory_region kvm_userspace_mem;
2735 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
2737 kvm_userspace_mem.slot = kvm_mem.slot;
2738 kvm_userspace_mem.flags = kvm_mem.flags;
2739 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
2740 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
2741 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
2746 case KVM_SET_NR_MMU_PAGES:
2747 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
2751 case KVM_GET_NR_MMU_PAGES:
2752 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
2754 case KVM_SET_MEMORY_ALIAS:
2756 if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias)))
2758 r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias);
2762 case KVM_CREATE_IRQCHIP: {
2763 struct kvm_pic *vpic;
2765 mutex_lock(&kvm->lock);
2768 goto create_irqchip_unlock;
2770 vpic = kvm_create_pic(kvm);
2772 r = kvm_ioapic_init(kvm);
2774 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
2777 goto create_irqchip_unlock;
2780 goto create_irqchip_unlock;
2782 kvm->arch.vpic = vpic;
2784 r = kvm_setup_default_irq_routing(kvm);
2786 mutex_lock(&kvm->irq_lock);
2787 kvm_ioapic_destroy(kvm);
2788 kvm_destroy_pic(kvm);
2789 mutex_unlock(&kvm->irq_lock);
2791 create_irqchip_unlock:
2792 mutex_unlock(&kvm->lock);
2795 case KVM_CREATE_PIT:
2796 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
2798 case KVM_CREATE_PIT2:
2800 if (copy_from_user(&u.pit_config, argp,
2801 sizeof(struct kvm_pit_config)))
2804 mutex_lock(&kvm->slots_lock);
2807 goto create_pit_unlock;
2809 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
2813 mutex_unlock(&kvm->slots_lock);
2815 case KVM_IRQ_LINE_STATUS:
2816 case KVM_IRQ_LINE: {
2817 struct kvm_irq_level irq_event;
2820 if (copy_from_user(&irq_event, argp, sizeof irq_event))
2822 if (irqchip_in_kernel(kvm)) {
2824 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2825 irq_event.irq, irq_event.level);
2826 if (ioctl == KVM_IRQ_LINE_STATUS) {
2827 irq_event.status = status;
2828 if (copy_to_user(argp, &irq_event,
2836 case KVM_GET_IRQCHIP: {
2837 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2838 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
2844 if (copy_from_user(chip, argp, sizeof *chip))
2845 goto get_irqchip_out;
2847 if (!irqchip_in_kernel(kvm))
2848 goto get_irqchip_out;
2849 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
2851 goto get_irqchip_out;
2853 if (copy_to_user(argp, chip, sizeof *chip))
2854 goto get_irqchip_out;
2862 case KVM_SET_IRQCHIP: {
2863 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2864 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
2870 if (copy_from_user(chip, argp, sizeof *chip))
2871 goto set_irqchip_out;
2873 if (!irqchip_in_kernel(kvm))
2874 goto set_irqchip_out;
2875 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
2877 goto set_irqchip_out;
2887 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
2890 if (!kvm->arch.vpit)
2892 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
2896 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
2903 if (copy_from_user(&u.ps, argp, sizeof u.ps))
2906 if (!kvm->arch.vpit)
2908 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
2914 case KVM_GET_PIT2: {
2916 if (!kvm->arch.vpit)
2918 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
2922 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
2927 case KVM_SET_PIT2: {
2929 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
2932 if (!kvm->arch.vpit)
2934 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
2940 case KVM_REINJECT_CONTROL: {
2941 struct kvm_reinject_control control;
2943 if (copy_from_user(&control, argp, sizeof(control)))
2945 r = kvm_vm_ioctl_reinject(kvm, &control);
2951 case KVM_XEN_HVM_CONFIG: {
2953 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
2954 sizeof(struct kvm_xen_hvm_config)))
2957 if (kvm->arch.xen_hvm_config.flags)
2962 case KVM_SET_CLOCK: {
2963 struct timespec now;
2964 struct kvm_clock_data user_ns;
2969 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
2978 now_ns = timespec_to_ns(&now);
2979 delta = user_ns.clock - now_ns;
2980 kvm->arch.kvmclock_offset = delta;
2983 case KVM_GET_CLOCK: {
2984 struct timespec now;
2985 struct kvm_clock_data user_ns;
2989 now_ns = timespec_to_ns(&now);
2990 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
2994 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3007 static void kvm_init_msr_list(void)
3012 /* skip the first msrs in the list. KVM-specific */
3013 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
3014 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3017 msrs_to_save[j] = msrs_to_save[i];
3020 num_msrs_to_save = j;
3023 static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3026 if (vcpu->arch.apic &&
3027 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v))
3030 return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
3033 static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
3035 if (vcpu->arch.apic &&
3036 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v))
3039 return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
3042 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3044 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3045 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3048 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3050 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3051 access |= PFERR_FETCH_MASK;
3052 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3055 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3057 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3058 access |= PFERR_WRITE_MASK;
3059 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3062 /* uses this to access any guest's mapped memory without checking CPL */
3063 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3065 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error);
3068 static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3069 struct kvm_vcpu *vcpu, u32 access,
3073 int r = X86EMUL_CONTINUE;
3076 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error);
3077 unsigned offset = addr & (PAGE_SIZE-1);
3078 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
3081 if (gpa == UNMAPPED_GVA) {
3082 r = X86EMUL_PROPAGATE_FAULT;
3085 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
3087 r = X86EMUL_UNHANDLEABLE;
3099 /* used for instruction fetching */
3100 static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes,
3101 struct kvm_vcpu *vcpu, u32 *error)
3103 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3104 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
3105 access | PFERR_FETCH_MASK, error);
3108 static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
3109 struct kvm_vcpu *vcpu, u32 *error)
3111 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3112 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
3116 static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes,
3117 struct kvm_vcpu *vcpu, u32 *error)
3119 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error);
3122 static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes,
3123 struct kvm_vcpu *vcpu, u32 *error)
3126 int r = X86EMUL_CONTINUE;
3129 gpa_t gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error);
3130 unsigned offset = addr & (PAGE_SIZE-1);
3131 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
3134 if (gpa == UNMAPPED_GVA) {
3135 r = X86EMUL_PROPAGATE_FAULT;
3138 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
3140 r = X86EMUL_UNHANDLEABLE;
3153 static int emulator_read_emulated(unsigned long addr,
3156 struct kvm_vcpu *vcpu)
3161 if (vcpu->mmio_read_completed) {
3162 memcpy(val, vcpu->mmio_data, bytes);
3163 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
3164 vcpu->mmio_phys_addr, *(u64 *)val);
3165 vcpu->mmio_read_completed = 0;
3166 return X86EMUL_CONTINUE;
3169 gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code);
3171 if (gpa == UNMAPPED_GVA) {
3172 kvm_inject_page_fault(vcpu, addr, error_code);
3173 return X86EMUL_PROPAGATE_FAULT;
3176 /* For APIC access vmexit */
3177 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3180 if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL)
3181 == X86EMUL_CONTINUE)
3182 return X86EMUL_CONTINUE;
3186 * Is this MMIO handled locally?
3188 if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) {
3189 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val);
3190 return X86EMUL_CONTINUE;
3193 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
3195 vcpu->mmio_needed = 1;
3196 vcpu->mmio_phys_addr = gpa;
3197 vcpu->mmio_size = bytes;
3198 vcpu->mmio_is_write = 0;
3200 return X86EMUL_UNHANDLEABLE;
3203 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
3204 const void *val, int bytes)
3208 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
3211 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
3215 static int emulator_write_emulated_onepage(unsigned long addr,
3218 struct kvm_vcpu *vcpu)
3223 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code);
3225 if (gpa == UNMAPPED_GVA) {
3226 kvm_inject_page_fault(vcpu, addr, error_code);
3227 return X86EMUL_PROPAGATE_FAULT;
3230 /* For APIC access vmexit */
3231 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3234 if (emulator_write_phys(vcpu, gpa, val, bytes))
3235 return X86EMUL_CONTINUE;
3238 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
3240 * Is this MMIO handled locally?
3242 if (!vcpu_mmio_write(vcpu, gpa, bytes, val))
3243 return X86EMUL_CONTINUE;
3245 vcpu->mmio_needed = 1;
3246 vcpu->mmio_phys_addr = gpa;
3247 vcpu->mmio_size = bytes;
3248 vcpu->mmio_is_write = 1;
3249 memcpy(vcpu->mmio_data, val, bytes);
3251 return X86EMUL_CONTINUE;
3254 int emulator_write_emulated(unsigned long addr,
3257 struct kvm_vcpu *vcpu)
3259 /* Crossing a page boundary? */
3260 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
3263 now = -addr & ~PAGE_MASK;
3264 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
3265 if (rc != X86EMUL_CONTINUE)
3271 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
3273 EXPORT_SYMBOL_GPL(emulator_write_emulated);
3275 static int emulator_cmpxchg_emulated(unsigned long addr,
3279 struct kvm_vcpu *vcpu)
3281 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
3282 #ifndef CONFIG_X86_64
3283 /* guests cmpxchg8b have to be emulated atomically */
3290 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
3292 if (gpa == UNMAPPED_GVA ||
3293 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3296 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
3301 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
3303 kaddr = kmap_atomic(page, KM_USER0);
3304 set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val);
3305 kunmap_atomic(kaddr, KM_USER0);
3306 kvm_release_page_dirty(page);
3311 return emulator_write_emulated(addr, new, bytes, vcpu);
3314 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
3316 return kvm_x86_ops->get_segment_base(vcpu, seg);
3319 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
3321 kvm_mmu_invlpg(vcpu, address);
3322 return X86EMUL_CONTINUE;
3325 int emulate_clts(struct kvm_vcpu *vcpu)
3327 kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
3328 kvm_x86_ops->fpu_activate(vcpu);
3329 return X86EMUL_CONTINUE;
3332 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
3334 return kvm_x86_ops->get_dr(ctxt->vcpu, dr, dest);
3337 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
3339 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
3341 return kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask);
3344 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
3347 unsigned long rip = kvm_rip_read(vcpu);
3348 unsigned long rip_linear;
3350 if (!printk_ratelimit())
3353 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
3355 kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu, NULL);
3357 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
3358 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
3360 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
3362 static struct x86_emulate_ops emulate_ops = {
3363 .read_std = kvm_read_guest_virt_system,
3364 .fetch = kvm_fetch_guest_virt,
3365 .read_emulated = emulator_read_emulated,
3366 .write_emulated = emulator_write_emulated,
3367 .cmpxchg_emulated = emulator_cmpxchg_emulated,
3370 static void cache_all_regs(struct kvm_vcpu *vcpu)
3372 kvm_register_read(vcpu, VCPU_REGS_RAX);
3373 kvm_register_read(vcpu, VCPU_REGS_RSP);
3374 kvm_register_read(vcpu, VCPU_REGS_RIP);
3375 vcpu->arch.regs_dirty = ~0;
3378 int emulate_instruction(struct kvm_vcpu *vcpu,
3384 struct decode_cache *c;
3385 struct kvm_run *run = vcpu->run;
3387 kvm_clear_exception_queue(vcpu);
3388 vcpu->arch.mmio_fault_cr2 = cr2;
3390 * TODO: fix emulate.c to use guest_read/write_register
3391 * instead of direct ->regs accesses, can save hundred cycles
3392 * on Intel for instructions that don't read/change RSP, for
3395 cache_all_regs(vcpu);
3397 vcpu->mmio_is_write = 0;
3398 vcpu->arch.pio.string = 0;
3400 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
3402 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
3404 vcpu->arch.emulate_ctxt.vcpu = vcpu;
3405 vcpu->arch.emulate_ctxt.eflags = kvm_get_rflags(vcpu);
3406 vcpu->arch.emulate_ctxt.mode =
3407 (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
3408 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
3409 ? X86EMUL_MODE_VM86 : cs_l
3410 ? X86EMUL_MODE_PROT64 : cs_db
3411 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
3413 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
3415 /* Only allow emulation of specific instructions on #UD
3416 * (namely VMMCALL, sysenter, sysexit, syscall)*/
3417 c = &vcpu->arch.emulate_ctxt.decode;
3418 if (emulation_type & EMULTYPE_TRAP_UD) {
3420 return EMULATE_FAIL;
3422 case 0x01: /* VMMCALL */
3423 if (c->modrm_mod != 3 || c->modrm_rm != 1)
3424 return EMULATE_FAIL;
3426 case 0x34: /* sysenter */
3427 case 0x35: /* sysexit */
3428 if (c->modrm_mod != 0 || c->modrm_rm != 0)
3429 return EMULATE_FAIL;
3431 case 0x05: /* syscall */
3432 if (c->modrm_mod != 0 || c->modrm_rm != 0)
3433 return EMULATE_FAIL;
3436 return EMULATE_FAIL;
3439 if (!(c->modrm_reg == 0 || c->modrm_reg == 3))
3440 return EMULATE_FAIL;
3443 ++vcpu->stat.insn_emulation;
3445 ++vcpu->stat.insn_emulation_fail;
3446 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
3447 return EMULATE_DONE;
3448 return EMULATE_FAIL;
3452 if (emulation_type & EMULTYPE_SKIP) {
3453 kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip);
3454 return EMULATE_DONE;
3457 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
3458 shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
3461 kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
3463 if (vcpu->arch.pio.string)
3464 return EMULATE_DO_MMIO;
3466 if ((r || vcpu->mmio_is_write) && run) {
3467 run->exit_reason = KVM_EXIT_MMIO;
3468 run->mmio.phys_addr = vcpu->mmio_phys_addr;
3469 memcpy(run->mmio.data, vcpu->mmio_data, 8);
3470 run->mmio.len = vcpu->mmio_size;
3471 run->mmio.is_write = vcpu->mmio_is_write;
3475 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
3476 return EMULATE_DONE;
3477 if (!vcpu->mmio_needed) {
3478 kvm_report_emulation_failure(vcpu, "mmio");
3479 return EMULATE_FAIL;
3481 return EMULATE_DO_MMIO;
3484 kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
3486 if (vcpu->mmio_is_write) {
3487 vcpu->mmio_needed = 0;
3488 return EMULATE_DO_MMIO;
3491 return EMULATE_DONE;
3493 EXPORT_SYMBOL_GPL(emulate_instruction);
3495 static int pio_copy_data(struct kvm_vcpu *vcpu)
3497 void *p = vcpu->arch.pio_data;
3498 gva_t q = vcpu->arch.pio.guest_gva;
3503 bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count;
3504 if (vcpu->arch.pio.in)
3505 ret = kvm_write_guest_virt(q, p, bytes, vcpu, &error_code);
3507 ret = kvm_read_guest_virt(q, p, bytes, vcpu, &error_code);
3509 if (ret == X86EMUL_PROPAGATE_FAULT)
3510 kvm_inject_page_fault(vcpu, q, error_code);
3515 int complete_pio(struct kvm_vcpu *vcpu)
3517 struct kvm_pio_request *io = &vcpu->arch.pio;
3524 val = kvm_register_read(vcpu, VCPU_REGS_RAX);
3525 memcpy(&val, vcpu->arch.pio_data, io->size);
3526 kvm_register_write(vcpu, VCPU_REGS_RAX, val);
3530 r = pio_copy_data(vcpu);
3537 delta *= io->cur_count;
3539 * The size of the register should really depend on
3540 * current address size.
3542 val = kvm_register_read(vcpu, VCPU_REGS_RCX);
3544 kvm_register_write(vcpu, VCPU_REGS_RCX, val);
3550 val = kvm_register_read(vcpu, VCPU_REGS_RDI);
3552 kvm_register_write(vcpu, VCPU_REGS_RDI, val);
3554 val = kvm_register_read(vcpu, VCPU_REGS_RSI);
3556 kvm_register_write(vcpu, VCPU_REGS_RSI, val);
3560 io->count -= io->cur_count;
3566 static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
3568 /* TODO: String I/O for in kernel device */
3571 if (vcpu->arch.pio.in)
3572 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
3573 vcpu->arch.pio.size, pd);
3575 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
3576 vcpu->arch.pio.port, vcpu->arch.pio.size,
3581 static int pio_string_write(struct kvm_vcpu *vcpu)
3583 struct kvm_pio_request *io = &vcpu->arch.pio;
3584 void *pd = vcpu->arch.pio_data;
3587 for (i = 0; i < io->cur_count; i++) {
3588 if (kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
3589 io->port, io->size, pd)) {
3598 int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port)
3602 trace_kvm_pio(!in, port, size, 1);
3604 vcpu->run->exit_reason = KVM_EXIT_IO;
3605 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3606 vcpu->run->io.size = vcpu->arch.pio.size = size;
3607 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3608 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1;
3609 vcpu->run->io.port = vcpu->arch.pio.port = port;
3610 vcpu->arch.pio.in = in;
3611 vcpu->arch.pio.string = 0;
3612 vcpu->arch.pio.down = 0;
3613 vcpu->arch.pio.rep = 0;
3615 if (!vcpu->arch.pio.in) {
3616 val = kvm_register_read(vcpu, VCPU_REGS_RAX);
3617 memcpy(vcpu->arch.pio_data, &val, 4);
3620 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
3626 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
3628 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in,
3629 int size, unsigned long count, int down,
3630 gva_t address, int rep, unsigned port)
3632 unsigned now, in_page;
3635 trace_kvm_pio(!in, port, size, count);
3637 vcpu->run->exit_reason = KVM_EXIT_IO;
3638 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3639 vcpu->run->io.size = vcpu->arch.pio.size = size;
3640 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3641 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count;
3642 vcpu->run->io.port = vcpu->arch.pio.port = port;
3643 vcpu->arch.pio.in = in;
3644 vcpu->arch.pio.string = 1;
3645 vcpu->arch.pio.down = down;
3646 vcpu->arch.pio.rep = rep;
3649 kvm_x86_ops->skip_emulated_instruction(vcpu);
3654 in_page = PAGE_SIZE - offset_in_page(address);
3656 in_page = offset_in_page(address) + size;
3657 now = min(count, (unsigned long)in_page / size);
3662 * String I/O in reverse. Yuck. Kill the guest, fix later.
3664 pr_unimpl(vcpu, "guest string pio down\n");
3665 kvm_inject_gp(vcpu, 0);
3668 vcpu->run->io.count = now;
3669 vcpu->arch.pio.cur_count = now;
3671 if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count)
3672 kvm_x86_ops->skip_emulated_instruction(vcpu);
3674 vcpu->arch.pio.guest_gva = address;
3676 if (!vcpu->arch.pio.in) {
3677 /* string PIO write */
3678 ret = pio_copy_data(vcpu);
3679 if (ret == X86EMUL_PROPAGATE_FAULT)
3681 if (ret == 0 && !pio_string_write(vcpu)) {
3683 if (vcpu->arch.pio.count == 0)
3687 /* no string PIO read support yet */
3691 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
3693 static void bounce_off(void *info)
3698 static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
3701 struct cpufreq_freqs *freq = data;
3703 struct kvm_vcpu *vcpu;
3704 int i, send_ipi = 0;
3706 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
3708 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
3710 per_cpu(cpu_tsc_khz, freq->cpu) = freq->new;
3712 spin_lock(&kvm_lock);
3713 list_for_each_entry(kvm, &vm_list, vm_list) {
3714 kvm_for_each_vcpu(i, vcpu, kvm) {
3715 if (vcpu->cpu != freq->cpu)
3717 if (!kvm_request_guest_time_update(vcpu))
3719 if (vcpu->cpu != smp_processor_id())
3723 spin_unlock(&kvm_lock);
3725 if (freq->old < freq->new && send_ipi) {
3727 * We upscale the frequency. Must make the guest
3728 * doesn't see old kvmclock values while running with
3729 * the new frequency, otherwise we risk the guest sees
3730 * time go backwards.
3732 * In case we update the frequency for another cpu
3733 * (which might be in guest context) send an interrupt
3734 * to kick the cpu out of guest context. Next time
3735 * guest context is entered kvmclock will be updated,
3736 * so the guest will not see stale values.
3738 smp_call_function_single(freq->cpu, bounce_off, NULL, 1);
3743 static struct notifier_block kvmclock_cpufreq_notifier_block = {
3744 .notifier_call = kvmclock_cpufreq_notifier
3747 static void kvm_timer_init(void)
3751 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
3752 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
3753 CPUFREQ_TRANSITION_NOTIFIER);
3754 for_each_online_cpu(cpu) {
3755 unsigned long khz = cpufreq_get(cpu);
3758 per_cpu(cpu_tsc_khz, cpu) = khz;
3761 for_each_possible_cpu(cpu)
3762 per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
3766 int kvm_arch_init(void *opaque)
3769 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
3772 printk(KERN_ERR "kvm: already loaded the other module\n");
3777 if (!ops->cpu_has_kvm_support()) {
3778 printk(KERN_ERR "kvm: no hardware support\n");
3782 if (ops->disabled_by_bios()) {
3783 printk(KERN_ERR "kvm: disabled by bios\n");
3788 r = kvm_mmu_module_init();
3792 kvm_init_msr_list();
3795 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
3796 kvm_mmu_set_base_ptes(PT_PRESENT_MASK);
3797 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
3798 PT_DIRTY_MASK, PT64_NX_MASK, 0);
3808 void kvm_arch_exit(void)
3810 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
3811 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
3812 CPUFREQ_TRANSITION_NOTIFIER);
3814 kvm_mmu_module_exit();
3817 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
3819 ++vcpu->stat.halt_exits;
3820 if (irqchip_in_kernel(vcpu->kvm)) {
3821 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
3824 vcpu->run->exit_reason = KVM_EXIT_HLT;
3828 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
3830 static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0,
3833 if (is_long_mode(vcpu))
3836 return a0 | ((gpa_t)a1 << 32);
3839 int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
3841 u64 param, ingpa, outgpa, ret;
3842 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
3843 bool fast, longmode;
3847 * hypercall generates UD from non zero cpl and real mode
3850 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
3851 kvm_queue_exception(vcpu, UD_VECTOR);
3855 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
3856 longmode = is_long_mode(vcpu) && cs_l == 1;
3859 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
3860 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
3861 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
3862 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
3863 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
3864 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
3866 #ifdef CONFIG_X86_64
3868 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
3869 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
3870 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
3874 code = param & 0xffff;
3875 fast = (param >> 16) & 0x1;
3876 rep_cnt = (param >> 32) & 0xfff;
3877 rep_idx = (param >> 48) & 0xfff;
3879 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
3882 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
3883 kvm_vcpu_on_spin(vcpu);
3886 res = HV_STATUS_INVALID_HYPERCALL_CODE;
3890 ret = res | (((u64)rep_done & 0xfff) << 32);
3892 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
3894 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
3895 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
3901 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
3903 unsigned long nr, a0, a1, a2, a3, ret;
3906 if (kvm_hv_hypercall_enabled(vcpu->kvm))
3907 return kvm_hv_hypercall(vcpu);
3909 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
3910 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
3911 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
3912 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
3913 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
3915 trace_kvm_hypercall(nr, a0, a1, a2, a3);
3917 if (!is_long_mode(vcpu)) {
3925 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
3931 case KVM_HC_VAPIC_POLL_IRQ:
3935 r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret);
3942 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
3943 ++vcpu->stat.hypercalls;
3946 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
3948 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
3950 char instruction[3];
3951 unsigned long rip = kvm_rip_read(vcpu);
3954 * Blow out the MMU to ensure that no other VCPU has an active mapping
3955 * to ensure that the updated hypercall appears atomically across all
3958 kvm_mmu_zap_all(vcpu->kvm);
3960 kvm_x86_ops->patch_hypercall(vcpu, instruction);
3962 return emulator_write_emulated(rip, instruction, 3, vcpu);
3965 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
3967 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
3970 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
3972 struct descriptor_table dt = { limit, base };
3974 kvm_x86_ops->set_gdt(vcpu, &dt);
3977 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
3979 struct descriptor_table dt = { limit, base };
3981 kvm_x86_ops->set_idt(vcpu, &dt);
3984 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
3985 unsigned long *rflags)
3987 kvm_lmsw(vcpu, msw);
3988 *rflags = kvm_get_rflags(vcpu);
3991 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
3993 unsigned long value;
3997 value = kvm_read_cr0(vcpu);
4000 value = vcpu->arch.cr2;
4003 value = vcpu->arch.cr3;
4006 value = kvm_read_cr4(vcpu);
4009 value = kvm_get_cr8(vcpu);
4012 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
4019 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
4020 unsigned long *rflags)
4024 kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
4025 *rflags = kvm_get_rflags(vcpu);
4028 vcpu->arch.cr2 = val;
4031 kvm_set_cr3(vcpu, val);
4034 kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
4037 kvm_set_cr8(vcpu, val & 0xfUL);
4040 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
4044 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
4046 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
4047 int j, nent = vcpu->arch.cpuid_nent;
4049 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
4050 /* when no next entry is found, the current entry[i] is reselected */
4051 for (j = i + 1; ; j = (j + 1) % nent) {
4052 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
4053 if (ej->function == e->function) {
4054 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
4058 return 0; /* silence gcc, even though control never reaches here */
4061 /* find an entry with matching function, matching index (if needed), and that
4062 * should be read next (if it's stateful) */
4063 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
4064 u32 function, u32 index)
4066 if (e->function != function)
4068 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
4070 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
4071 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
4076 struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
4077 u32 function, u32 index)
4080 struct kvm_cpuid_entry2 *best = NULL;
4082 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
4083 struct kvm_cpuid_entry2 *e;
4085 e = &vcpu->arch.cpuid_entries[i];
4086 if (is_matching_cpuid_entry(e, function, index)) {
4087 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
4088 move_to_next_stateful_cpuid_entry(vcpu, i);
4093 * Both basic or both extended?
4095 if (((e->function ^ function) & 0x80000000) == 0)
4096 if (!best || e->function > best->function)
4101 EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry);
4103 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
4105 struct kvm_cpuid_entry2 *best;
4107 best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
4109 return best->eax & 0xff;
4113 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
4115 u32 function, index;
4116 struct kvm_cpuid_entry2 *best;
4118 function = kvm_register_read(vcpu, VCPU_REGS_RAX);
4119 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
4120 kvm_register_write(vcpu, VCPU_REGS_RAX, 0);
4121 kvm_register_write(vcpu, VCPU_REGS_RBX, 0);
4122 kvm_register_write(vcpu, VCPU_REGS_RCX, 0);
4123 kvm_register_write(vcpu, VCPU_REGS_RDX, 0);
4124 best = kvm_find_cpuid_entry(vcpu, function, index);
4126 kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax);
4127 kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx);
4128 kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx);
4129 kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx);
4131 kvm_x86_ops->skip_emulated_instruction(vcpu);
4132 trace_kvm_cpuid(function,
4133 kvm_register_read(vcpu, VCPU_REGS_RAX),
4134 kvm_register_read(vcpu, VCPU_REGS_RBX),
4135 kvm_register_read(vcpu, VCPU_REGS_RCX),
4136 kvm_register_read(vcpu, VCPU_REGS_RDX));
4138 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
4141 * Check if userspace requested an interrupt window, and that the
4142 * interrupt window is open.
4144 * No need to exit to userspace if we already have an interrupt queued.
4146 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
4148 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
4149 vcpu->run->request_interrupt_window &&
4150 kvm_arch_interrupt_allowed(vcpu));
4153 static void post_kvm_run_save(struct kvm_vcpu *vcpu)
4155 struct kvm_run *kvm_run = vcpu->run;
4157 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
4158 kvm_run->cr8 = kvm_get_cr8(vcpu);
4159 kvm_run->apic_base = kvm_get_apic_base(vcpu);
4160 if (irqchip_in_kernel(vcpu->kvm))
4161 kvm_run->ready_for_interrupt_injection = 1;
4163 kvm_run->ready_for_interrupt_injection =
4164 kvm_arch_interrupt_allowed(vcpu) &&
4165 !kvm_cpu_has_interrupt(vcpu) &&
4166 !kvm_event_needs_reinjection(vcpu);
4169 static void vapic_enter(struct kvm_vcpu *vcpu)
4171 struct kvm_lapic *apic = vcpu->arch.apic;
4174 if (!apic || !apic->vapic_addr)
4177 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
4179 vcpu->arch.apic->vapic_page = page;
4182 static void vapic_exit(struct kvm_vcpu *vcpu)
4184 struct kvm_lapic *apic = vcpu->arch.apic;
4187 if (!apic || !apic->vapic_addr)
4190 idx = srcu_read_lock(&vcpu->kvm->srcu);
4191 kvm_release_page_dirty(apic->vapic_page);
4192 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
4193 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4196 static void update_cr8_intercept(struct kvm_vcpu *vcpu)
4200 if (!kvm_x86_ops->update_cr8_intercept)
4203 if (!vcpu->arch.apic)
4206 if (!vcpu->arch.apic->vapic_addr)
4207 max_irr = kvm_lapic_find_highest_irr(vcpu);
4214 tpr = kvm_lapic_get_cr8(vcpu);
4216 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
4219 static void inject_pending_event(struct kvm_vcpu *vcpu)
4221 /* try to reinject previous events if any */
4222 if (vcpu->arch.exception.pending) {
4223 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
4224 vcpu->arch.exception.has_error_code,
4225 vcpu->arch.exception.error_code);
4229 if (vcpu->arch.nmi_injected) {
4230 kvm_x86_ops->set_nmi(vcpu);
4234 if (vcpu->arch.interrupt.pending) {
4235 kvm_x86_ops->set_irq(vcpu);
4239 /* try to inject new event if pending */
4240 if (vcpu->arch.nmi_pending) {
4241 if (kvm_x86_ops->nmi_allowed(vcpu)) {
4242 vcpu->arch.nmi_pending = false;
4243 vcpu->arch.nmi_injected = true;
4244 kvm_x86_ops->set_nmi(vcpu);
4246 } else if (kvm_cpu_has_interrupt(vcpu)) {
4247 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
4248 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
4250 kvm_x86_ops->set_irq(vcpu);
4255 static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
4258 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
4259 vcpu->run->request_interrupt_window;
4262 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
4263 kvm_mmu_unload(vcpu);
4265 r = kvm_mmu_reload(vcpu);
4269 if (vcpu->requests) {
4270 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
4271 __kvm_migrate_timers(vcpu);
4272 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests))
4273 kvm_write_guest_time(vcpu);
4274 if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests))
4275 kvm_mmu_sync_roots(vcpu);
4276 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
4277 kvm_x86_ops->tlb_flush(vcpu);
4278 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
4280 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
4284 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) {
4285 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
4289 if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) {
4290 vcpu->fpu_active = 0;
4291 kvm_x86_ops->fpu_deactivate(vcpu);
4297 kvm_x86_ops->prepare_guest_switch(vcpu);
4298 if (vcpu->fpu_active)
4299 kvm_load_guest_fpu(vcpu);
4301 local_irq_disable();
4303 clear_bit(KVM_REQ_KICK, &vcpu->requests);
4304 smp_mb__after_clear_bit();
4306 if (vcpu->requests || need_resched() || signal_pending(current)) {
4307 set_bit(KVM_REQ_KICK, &vcpu->requests);
4314 inject_pending_event(vcpu);
4316 /* enable NMI/IRQ window open exits if needed */
4317 if (vcpu->arch.nmi_pending)
4318 kvm_x86_ops->enable_nmi_window(vcpu);
4319 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
4320 kvm_x86_ops->enable_irq_window(vcpu);
4322 if (kvm_lapic_enabled(vcpu)) {
4323 update_cr8_intercept(vcpu);
4324 kvm_lapic_sync_to_vapic(vcpu);
4327 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4331 if (unlikely(vcpu->arch.switch_db_regs)) {
4333 set_debugreg(vcpu->arch.eff_db[0], 0);
4334 set_debugreg(vcpu->arch.eff_db[1], 1);
4335 set_debugreg(vcpu->arch.eff_db[2], 2);
4336 set_debugreg(vcpu->arch.eff_db[3], 3);
4339 trace_kvm_entry(vcpu->vcpu_id);
4340 kvm_x86_ops->run(vcpu);
4343 * If the guest has used debug registers, at least dr7
4344 * will be disabled while returning to the host.
4345 * If we don't have active breakpoints in the host, we don't
4346 * care about the messed up debug address registers. But if
4347 * we have some of them active, restore the old state.
4349 if (hw_breakpoint_active())
4350 hw_breakpoint_restore();
4352 set_bit(KVM_REQ_KICK, &vcpu->requests);
4358 * We must have an instruction between local_irq_enable() and
4359 * kvm_guest_exit(), so the timer interrupt isn't delayed by
4360 * the interrupt shadow. The stat.exits increment will do nicely.
4361 * But we need to prevent reordering, hence this barrier():
4369 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4372 * Profile KVM exit RIPs:
4374 if (unlikely(prof_on == KVM_PROFILING)) {
4375 unsigned long rip = kvm_rip_read(vcpu);
4376 profile_hit(KVM_PROFILING, (void *)rip);
4380 kvm_lapic_sync_from_vapic(vcpu);
4382 r = kvm_x86_ops->handle_exit(vcpu);
4388 static int __vcpu_run(struct kvm_vcpu *vcpu)
4391 struct kvm *kvm = vcpu->kvm;
4393 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
4394 pr_debug("vcpu %d received sipi with vector # %x\n",
4395 vcpu->vcpu_id, vcpu->arch.sipi_vector);
4396 kvm_lapic_reset(vcpu);
4397 r = kvm_arch_vcpu_reset(vcpu);
4400 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
4403 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4408 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
4409 r = vcpu_enter_guest(vcpu);
4411 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4412 kvm_vcpu_block(vcpu);
4413 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4414 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
4416 switch(vcpu->arch.mp_state) {
4417 case KVM_MP_STATE_HALTED:
4418 vcpu->arch.mp_state =
4419 KVM_MP_STATE_RUNNABLE;
4420 case KVM_MP_STATE_RUNNABLE:
4422 case KVM_MP_STATE_SIPI_RECEIVED:
4433 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
4434 if (kvm_cpu_has_pending_timer(vcpu))
4435 kvm_inject_pending_timer_irqs(vcpu);
4437 if (dm_request_for_irq_injection(vcpu)) {
4439 vcpu->run->exit_reason = KVM_EXIT_INTR;
4440 ++vcpu->stat.request_irq_exits;
4442 if (signal_pending(current)) {
4444 vcpu->run->exit_reason = KVM_EXIT_INTR;
4445 ++vcpu->stat.signal_exits;
4447 if (need_resched()) {
4448 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4450 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4454 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4455 post_kvm_run_save(vcpu);
4462 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4469 if (vcpu->sigset_active)
4470 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
4472 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
4473 kvm_vcpu_block(vcpu);
4474 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
4479 /* re-sync apic's tpr */
4480 if (!irqchip_in_kernel(vcpu->kvm))
4481 kvm_set_cr8(vcpu, kvm_run->cr8);
4483 if (vcpu->arch.pio.cur_count) {
4484 r = complete_pio(vcpu);
4488 if (vcpu->mmio_needed) {
4489 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
4490 vcpu->mmio_read_completed = 1;
4491 vcpu->mmio_needed = 0;
4493 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4494 r = emulate_instruction(vcpu, vcpu->arch.mmio_fault_cr2, 0,
4495 EMULTYPE_NO_DECODE);
4496 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4497 if (r == EMULATE_DO_MMIO) {
4499 * Read-modify-write. Back to userspace.
4505 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL)
4506 kvm_register_write(vcpu, VCPU_REGS_RAX,
4507 kvm_run->hypercall.ret);
4509 r = __vcpu_run(vcpu);
4512 if (vcpu->sigset_active)
4513 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
4519 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
4523 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
4524 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
4525 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
4526 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
4527 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
4528 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
4529 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
4530 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
4531 #ifdef CONFIG_X86_64
4532 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
4533 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
4534 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
4535 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
4536 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
4537 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
4538 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
4539 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
4542 regs->rip = kvm_rip_read(vcpu);
4543 regs->rflags = kvm_get_rflags(vcpu);
4550 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
4554 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
4555 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
4556 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
4557 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
4558 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
4559 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
4560 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
4561 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
4562 #ifdef CONFIG_X86_64
4563 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
4564 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
4565 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
4566 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
4567 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
4568 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
4569 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
4570 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
4573 kvm_rip_write(vcpu, regs->rip);
4574 kvm_set_rflags(vcpu, regs->rflags);
4576 vcpu->arch.exception.pending = false;
4583 void kvm_get_segment(struct kvm_vcpu *vcpu,
4584 struct kvm_segment *var, int seg)
4586 kvm_x86_ops->get_segment(vcpu, var, seg);
4589 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
4591 struct kvm_segment cs;
4593 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
4597 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
4599 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
4600 struct kvm_sregs *sregs)
4602 struct descriptor_table dt;
4606 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
4607 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
4608 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
4609 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
4610 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
4611 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
4613 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
4614 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
4616 kvm_x86_ops->get_idt(vcpu, &dt);
4617 sregs->idt.limit = dt.limit;
4618 sregs->idt.base = dt.base;
4619 kvm_x86_ops->get_gdt(vcpu, &dt);
4620 sregs->gdt.limit = dt.limit;
4621 sregs->gdt.base = dt.base;
4623 sregs->cr0 = kvm_read_cr0(vcpu);
4624 sregs->cr2 = vcpu->arch.cr2;
4625 sregs->cr3 = vcpu->arch.cr3;
4626 sregs->cr4 = kvm_read_cr4(vcpu);
4627 sregs->cr8 = kvm_get_cr8(vcpu);
4628 sregs->efer = vcpu->arch.efer;
4629 sregs->apic_base = kvm_get_apic_base(vcpu);
4631 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
4633 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
4634 set_bit(vcpu->arch.interrupt.nr,
4635 (unsigned long *)sregs->interrupt_bitmap);
4642 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
4643 struct kvm_mp_state *mp_state)
4646 mp_state->mp_state = vcpu->arch.mp_state;
4651 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
4652 struct kvm_mp_state *mp_state)
4655 vcpu->arch.mp_state = mp_state->mp_state;
4660 static void kvm_set_segment(struct kvm_vcpu *vcpu,
4661 struct kvm_segment *var, int seg)
4663 kvm_x86_ops->set_segment(vcpu, var, seg);
4666 static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector,
4667 struct kvm_segment *kvm_desct)
4669 kvm_desct->base = get_desc_base(seg_desc);
4670 kvm_desct->limit = get_desc_limit(seg_desc);
4672 kvm_desct->limit <<= 12;
4673 kvm_desct->limit |= 0xfff;
4675 kvm_desct->selector = selector;
4676 kvm_desct->type = seg_desc->type;
4677 kvm_desct->present = seg_desc->p;
4678 kvm_desct->dpl = seg_desc->dpl;
4679 kvm_desct->db = seg_desc->d;
4680 kvm_desct->s = seg_desc->s;
4681 kvm_desct->l = seg_desc->l;
4682 kvm_desct->g = seg_desc->g;
4683 kvm_desct->avl = seg_desc->avl;
4685 kvm_desct->unusable = 1;
4687 kvm_desct->unusable = 0;
4688 kvm_desct->padding = 0;
4691 static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu,
4693 struct descriptor_table *dtable)
4695 if (selector & 1 << 2) {
4696 struct kvm_segment kvm_seg;
4698 kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR);
4700 if (kvm_seg.unusable)
4703 dtable->limit = kvm_seg.limit;
4704 dtable->base = kvm_seg.base;
4707 kvm_x86_ops->get_gdt(vcpu, dtable);
4710 /* allowed just for 8 bytes segments */
4711 static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
4712 struct desc_struct *seg_desc)
4714 struct descriptor_table dtable;
4715 u16 index = selector >> 3;
4720 get_segment_descriptor_dtable(vcpu, selector, &dtable);
4722 if (dtable.limit < index * 8 + 7) {
4723 kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc);
4724 return X86EMUL_PROPAGATE_FAULT;
4726 addr = dtable.base + index * 8;
4727 ret = kvm_read_guest_virt_system(addr, seg_desc, sizeof(*seg_desc),
4729 if (ret == X86EMUL_PROPAGATE_FAULT)
4730 kvm_inject_page_fault(vcpu, addr, err);
4735 /* allowed just for 8 bytes segments */
4736 static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
4737 struct desc_struct *seg_desc)
4739 struct descriptor_table dtable;
4740 u16 index = selector >> 3;
4742 get_segment_descriptor_dtable(vcpu, selector, &dtable);
4744 if (dtable.limit < index * 8 + 7)
4746 return kvm_write_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu, NULL);
4749 static gpa_t get_tss_base_addr_write(struct kvm_vcpu *vcpu,
4750 struct desc_struct *seg_desc)
4752 u32 base_addr = get_desc_base(seg_desc);
4754 return kvm_mmu_gva_to_gpa_write(vcpu, base_addr, NULL);
4757 static gpa_t get_tss_base_addr_read(struct kvm_vcpu *vcpu,
4758 struct desc_struct *seg_desc)
4760 u32 base_addr = get_desc_base(seg_desc);
4762 return kvm_mmu_gva_to_gpa_read(vcpu, base_addr, NULL);
4765 static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg)
4767 struct kvm_segment kvm_seg;
4769 kvm_get_segment(vcpu, &kvm_seg, seg);
4770 return kvm_seg.selector;
4773 static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg)
4775 struct kvm_segment segvar = {
4776 .base = selector << 4,
4778 .selector = selector,
4789 kvm_x86_ops->set_segment(vcpu, &segvar, seg);
4793 static int is_vm86_segment(struct kvm_vcpu *vcpu, int seg)
4795 return (seg != VCPU_SREG_LDTR) &&
4796 (seg != VCPU_SREG_TR) &&
4797 (kvm_get_rflags(vcpu) & X86_EFLAGS_VM);
4800 static void kvm_check_segment_descriptor(struct kvm_vcpu *vcpu, int seg,
4803 /* NULL selector is not valid for CS and SS */
4804 if (seg == VCPU_SREG_CS || seg == VCPU_SREG_SS)
4806 kvm_queue_exception_e(vcpu, TS_VECTOR, selector >> 3);
4809 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
4810 int type_bits, int seg)
4812 struct kvm_segment kvm_seg;
4813 struct desc_struct seg_desc;
4815 if (is_vm86_segment(vcpu, seg) || !is_protmode(vcpu))
4816 return kvm_load_realmode_segment(vcpu, selector, seg);
4818 if (load_guest_segment_descriptor(vcpu, selector, &seg_desc))
4820 seg_desct_to_kvm_desct(&seg_desc, selector, &kvm_seg);
4822 kvm_check_segment_descriptor(vcpu, seg, selector);
4823 kvm_seg.type |= type_bits;
4825 if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS &&
4826 seg != VCPU_SREG_LDTR)
4828 kvm_seg.unusable = 1;
4830 kvm_set_segment(vcpu, &kvm_seg, seg);
4831 if (selector && !kvm_seg.unusable && kvm_seg.s) {
4832 /* mark segment as accessed */
4834 save_guest_segment_descriptor(vcpu, selector, &seg_desc);
4839 static void save_state_to_tss32(struct kvm_vcpu *vcpu,
4840 struct tss_segment_32 *tss)
4842 tss->cr3 = vcpu->arch.cr3;
4843 tss->eip = kvm_rip_read(vcpu);
4844 tss->eflags = kvm_get_rflags(vcpu);
4845 tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX);
4846 tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX);
4847 tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX);
4848 tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX);
4849 tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP);
4850 tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP);
4851 tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI);
4852 tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI);
4853 tss->es = get_segment_selector(vcpu, VCPU_SREG_ES);
4854 tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS);
4855 tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS);
4856 tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS);
4857 tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS);
4858 tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS);
4859 tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR);
4862 static int load_state_from_tss32(struct kvm_vcpu *vcpu,
4863 struct tss_segment_32 *tss)
4865 kvm_set_cr3(vcpu, tss->cr3);
4867 kvm_rip_write(vcpu, tss->eip);
4868 kvm_set_rflags(vcpu, tss->eflags | 2);
4870 kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax);
4871 kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx);
4872 kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx);
4873 kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx);
4874 kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp);
4875 kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp);
4876 kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi);
4877 kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi);
4879 if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR))
4882 if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES))
4885 if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS))
4888 if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS))
4891 if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS))
4894 if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS))
4897 if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS))
4902 static void save_state_to_tss16(struct kvm_vcpu *vcpu,
4903 struct tss_segment_16 *tss)
4905 tss->ip = kvm_rip_read(vcpu);
4906 tss->flag = kvm_get_rflags(vcpu);
4907 tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX);
4908 tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX);
4909 tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX);
4910 tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX);
4911 tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP);
4912 tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP);
4913 tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI);
4914 tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI);
4916 tss->es = get_segment_selector(vcpu, VCPU_SREG_ES);
4917 tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS);
4918 tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS);
4919 tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS);
4920 tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR);
4923 static int load_state_from_tss16(struct kvm_vcpu *vcpu,
4924 struct tss_segment_16 *tss)
4926 kvm_rip_write(vcpu, tss->ip);
4927 kvm_set_rflags(vcpu, tss->flag | 2);
4928 kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax);
4929 kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx);
4930 kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx);
4931 kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx);
4932 kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp);
4933 kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp);
4934 kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si);
4935 kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di);
4937 if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR))
4940 if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES))
4943 if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS))
4946 if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS))
4949 if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS))
4954 static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector,
4955 u16 old_tss_sel, u32 old_tss_base,
4956 struct desc_struct *nseg_desc)
4958 struct tss_segment_16 tss_segment_16;
4961 if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16,
4962 sizeof tss_segment_16))
4965 save_state_to_tss16(vcpu, &tss_segment_16);
4967 if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16,
4968 sizeof tss_segment_16))
4971 if (kvm_read_guest(vcpu->kvm, get_tss_base_addr_read(vcpu, nseg_desc),
4972 &tss_segment_16, sizeof tss_segment_16))
4975 if (old_tss_sel != 0xffff) {
4976 tss_segment_16.prev_task_link = old_tss_sel;
4978 if (kvm_write_guest(vcpu->kvm,
4979 get_tss_base_addr_write(vcpu, nseg_desc),
4980 &tss_segment_16.prev_task_link,
4981 sizeof tss_segment_16.prev_task_link))
4985 if (load_state_from_tss16(vcpu, &tss_segment_16))
4993 static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector,
4994 u16 old_tss_sel, u32 old_tss_base,
4995 struct desc_struct *nseg_desc)
4997 struct tss_segment_32 tss_segment_32;
5000 if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32,
5001 sizeof tss_segment_32))
5004 save_state_to_tss32(vcpu, &tss_segment_32);
5006 if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32,
5007 sizeof tss_segment_32))
5010 if (kvm_read_guest(vcpu->kvm, get_tss_base_addr_read(vcpu, nseg_desc),
5011 &tss_segment_32, sizeof tss_segment_32))
5014 if (old_tss_sel != 0xffff) {
5015 tss_segment_32.prev_task_link = old_tss_sel;
5017 if (kvm_write_guest(vcpu->kvm,
5018 get_tss_base_addr_write(vcpu, nseg_desc),
5019 &tss_segment_32.prev_task_link,
5020 sizeof tss_segment_32.prev_task_link))
5024 if (load_state_from_tss32(vcpu, &tss_segment_32))
5032 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason)
5034 struct kvm_segment tr_seg;
5035 struct desc_struct cseg_desc;
5036 struct desc_struct nseg_desc;
5038 u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR);
5039 u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR);
5041 old_tss_base = kvm_mmu_gva_to_gpa_write(vcpu, old_tss_base, NULL);
5043 /* FIXME: Handle errors. Failure to read either TSS or their
5044 * descriptors should generate a pagefault.
5046 if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc))
5049 if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc))
5052 if (reason != TASK_SWITCH_IRET) {
5055 cpl = kvm_x86_ops->get_cpl(vcpu);
5056 if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) {
5057 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
5062 if (!nseg_desc.p || get_desc_limit(&nseg_desc) < 0x67) {
5063 kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc);
5067 if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) {
5068 cseg_desc.type &= ~(1 << 1); //clear the B flag
5069 save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc);
5072 if (reason == TASK_SWITCH_IRET) {
5073 u32 eflags = kvm_get_rflags(vcpu);
5074 kvm_set_rflags(vcpu, eflags & ~X86_EFLAGS_NT);
5077 /* set back link to prev task only if NT bit is set in eflags
5078 note that old_tss_sel is not used afetr this point */
5079 if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE)
5080 old_tss_sel = 0xffff;
5082 if (nseg_desc.type & 8)
5083 ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel,
5084 old_tss_base, &nseg_desc);
5086 ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel,
5087 old_tss_base, &nseg_desc);
5089 if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) {
5090 u32 eflags = kvm_get_rflags(vcpu);
5091 kvm_set_rflags(vcpu, eflags | X86_EFLAGS_NT);
5094 if (reason != TASK_SWITCH_IRET) {
5095 nseg_desc.type |= (1 << 1);
5096 save_guest_segment_descriptor(vcpu, tss_selector,
5100 kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0(vcpu) | X86_CR0_TS);
5101 seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg);
5103 kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR);
5107 EXPORT_SYMBOL_GPL(kvm_task_switch);
5109 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
5110 struct kvm_sregs *sregs)
5112 int mmu_reset_needed = 0;
5113 int pending_vec, max_bits;
5114 struct descriptor_table dt;
5118 dt.limit = sregs->idt.limit;
5119 dt.base = sregs->idt.base;
5120 kvm_x86_ops->set_idt(vcpu, &dt);
5121 dt.limit = sregs->gdt.limit;
5122 dt.base = sregs->gdt.base;
5123 kvm_x86_ops->set_gdt(vcpu, &dt);
5125 vcpu->arch.cr2 = sregs->cr2;
5126 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
5127 vcpu->arch.cr3 = sregs->cr3;
5129 kvm_set_cr8(vcpu, sregs->cr8);
5131 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
5132 kvm_x86_ops->set_efer(vcpu, sregs->efer);
5133 kvm_set_apic_base(vcpu, sregs->apic_base);
5135 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
5136 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
5137 vcpu->arch.cr0 = sregs->cr0;
5139 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
5140 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
5141 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
5142 load_pdptrs(vcpu, vcpu->arch.cr3);
5143 mmu_reset_needed = 1;
5146 if (mmu_reset_needed)
5147 kvm_mmu_reset_context(vcpu);
5149 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
5150 pending_vec = find_first_bit(
5151 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
5152 if (pending_vec < max_bits) {
5153 kvm_queue_interrupt(vcpu, pending_vec, false);
5154 pr_debug("Set back pending irq %d\n", pending_vec);
5155 if (irqchip_in_kernel(vcpu->kvm))
5156 kvm_pic_clear_isr_ack(vcpu->kvm);
5159 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5160 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5161 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5162 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5163 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5164 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
5166 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5167 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
5169 update_cr8_intercept(vcpu);
5171 /* Older userspace won't unhalt the vcpu on reset. */
5172 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
5173 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
5175 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5182 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
5183 struct kvm_guest_debug *dbg)
5185 unsigned long rflags;
5190 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
5192 if (vcpu->arch.exception.pending)
5194 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
5195 kvm_queue_exception(vcpu, DB_VECTOR);
5197 kvm_queue_exception(vcpu, BP_VECTOR);
5201 * Read rflags as long as potentially injected trace flags are still
5204 rflags = kvm_get_rflags(vcpu);
5206 vcpu->guest_debug = dbg->control;
5207 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
5208 vcpu->guest_debug = 0;
5210 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
5211 for (i = 0; i < KVM_NR_DB_REGS; ++i)
5212 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
5213 vcpu->arch.switch_db_regs =
5214 (dbg->arch.debugreg[7] & DR7_BP_EN_MASK);
5216 for (i = 0; i < KVM_NR_DB_REGS; i++)
5217 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
5218 vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
5221 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
5222 vcpu->arch.singlestep_cs =
5223 get_segment_selector(vcpu, VCPU_SREG_CS);
5224 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu);
5228 * Trigger an rflags update that will inject or remove the trace
5231 kvm_set_rflags(vcpu, rflags);
5233 kvm_x86_ops->set_guest_debug(vcpu, dbg);
5244 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
5245 * we have asm/x86/processor.h
5256 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
5257 #ifdef CONFIG_X86_64
5258 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
5260 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
5265 * Translate a guest virtual address to a guest physical address.
5267 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
5268 struct kvm_translation *tr)
5270 unsigned long vaddr = tr->linear_address;
5275 idx = srcu_read_lock(&vcpu->kvm->srcu);
5276 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
5277 srcu_read_unlock(&vcpu->kvm->srcu, idx);
5278 tr->physical_address = gpa;
5279 tr->valid = gpa != UNMAPPED_GVA;
5287 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5289 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
5293 memcpy(fpu->fpr, fxsave->st_space, 128);
5294 fpu->fcw = fxsave->cwd;
5295 fpu->fsw = fxsave->swd;
5296 fpu->ftwx = fxsave->twd;
5297 fpu->last_opcode = fxsave->fop;
5298 fpu->last_ip = fxsave->rip;
5299 fpu->last_dp = fxsave->rdp;
5300 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
5307 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5309 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
5313 memcpy(fxsave->st_space, fpu->fpr, 128);
5314 fxsave->cwd = fpu->fcw;
5315 fxsave->swd = fpu->fsw;
5316 fxsave->twd = fpu->ftwx;
5317 fxsave->fop = fpu->last_opcode;
5318 fxsave->rip = fpu->last_ip;
5319 fxsave->rdp = fpu->last_dp;
5320 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
5327 void fx_init(struct kvm_vcpu *vcpu)
5329 unsigned after_mxcsr_mask;
5332 * Touch the fpu the first time in non atomic context as if
5333 * this is the first fpu instruction the exception handler
5334 * will fire before the instruction returns and it'll have to
5335 * allocate ram with GFP_KERNEL.
5338 kvm_fx_save(&vcpu->arch.host_fx_image);
5340 /* Initialize guest FPU by resetting ours and saving into guest's */
5342 kvm_fx_save(&vcpu->arch.host_fx_image);
5344 kvm_fx_save(&vcpu->arch.guest_fx_image);
5345 kvm_fx_restore(&vcpu->arch.host_fx_image);
5348 vcpu->arch.cr0 |= X86_CR0_ET;
5349 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
5350 vcpu->arch.guest_fx_image.mxcsr = 0x1f80;
5351 memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask,
5352 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
5354 EXPORT_SYMBOL_GPL(fx_init);
5356 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
5358 if (vcpu->guest_fpu_loaded)
5361 vcpu->guest_fpu_loaded = 1;
5362 kvm_fx_save(&vcpu->arch.host_fx_image);
5363 kvm_fx_restore(&vcpu->arch.guest_fx_image);
5367 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
5369 if (!vcpu->guest_fpu_loaded)
5372 vcpu->guest_fpu_loaded = 0;
5373 kvm_fx_save(&vcpu->arch.guest_fx_image);
5374 kvm_fx_restore(&vcpu->arch.host_fx_image);
5375 ++vcpu->stat.fpu_reload;
5376 set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
5380 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
5382 if (vcpu->arch.time_page) {
5383 kvm_release_page_dirty(vcpu->arch.time_page);
5384 vcpu->arch.time_page = NULL;
5387 kvm_x86_ops->vcpu_free(vcpu);
5390 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
5393 return kvm_x86_ops->vcpu_create(kvm, id);
5396 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
5400 /* We do fxsave: this must be aligned. */
5401 BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF);
5403 vcpu->arch.mtrr_state.have_fixed = 1;
5405 r = kvm_arch_vcpu_reset(vcpu);
5407 r = kvm_mmu_setup(vcpu);
5414 kvm_x86_ops->vcpu_free(vcpu);
5418 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
5421 kvm_mmu_unload(vcpu);
5424 kvm_x86_ops->vcpu_free(vcpu);
5427 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
5429 vcpu->arch.nmi_pending = false;
5430 vcpu->arch.nmi_injected = false;
5432 vcpu->arch.switch_db_regs = 0;
5433 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
5434 vcpu->arch.dr6 = DR6_FIXED_1;
5435 vcpu->arch.dr7 = DR7_FIXED_1;
5437 return kvm_x86_ops->vcpu_reset(vcpu);
5440 int kvm_arch_hardware_enable(void *garbage)
5443 * Since this may be called from a hotplug notifcation,
5444 * we can't get the CPU frequency directly.
5446 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
5447 int cpu = raw_smp_processor_id();
5448 per_cpu(cpu_tsc_khz, cpu) = 0;
5451 kvm_shared_msr_cpu_online();
5453 return kvm_x86_ops->hardware_enable(garbage);
5456 void kvm_arch_hardware_disable(void *garbage)
5458 kvm_x86_ops->hardware_disable(garbage);
5459 drop_user_return_notifiers(garbage);
5462 int kvm_arch_hardware_setup(void)
5464 return kvm_x86_ops->hardware_setup();
5467 void kvm_arch_hardware_unsetup(void)
5469 kvm_x86_ops->hardware_unsetup();
5472 void kvm_arch_check_processor_compat(void *rtn)
5474 kvm_x86_ops->check_processor_compatibility(rtn);
5477 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
5483 BUG_ON(vcpu->kvm == NULL);
5486 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
5487 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
5488 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5490 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
5492 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
5497 vcpu->arch.pio_data = page_address(page);
5499 r = kvm_mmu_create(vcpu);
5501 goto fail_free_pio_data;
5503 if (irqchip_in_kernel(kvm)) {
5504 r = kvm_create_lapic(vcpu);
5506 goto fail_mmu_destroy;
5509 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
5511 if (!vcpu->arch.mce_banks) {
5513 goto fail_free_lapic;
5515 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
5519 kvm_free_lapic(vcpu);
5521 kvm_mmu_destroy(vcpu);
5523 free_page((unsigned long)vcpu->arch.pio_data);
5528 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
5532 kfree(vcpu->arch.mce_banks);
5533 kvm_free_lapic(vcpu);
5534 idx = srcu_read_lock(&vcpu->kvm->srcu);
5535 kvm_mmu_destroy(vcpu);
5536 srcu_read_unlock(&vcpu->kvm->srcu, idx);
5537 free_page((unsigned long)vcpu->arch.pio_data);
5540 struct kvm *kvm_arch_create_vm(void)
5542 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
5545 return ERR_PTR(-ENOMEM);
5547 kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
5548 if (!kvm->arch.aliases) {
5550 return ERR_PTR(-ENOMEM);
5553 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
5554 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
5556 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
5557 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
5559 rdtscll(kvm->arch.vm_init_tsc);
5564 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
5567 kvm_mmu_unload(vcpu);
5571 static void kvm_free_vcpus(struct kvm *kvm)
5574 struct kvm_vcpu *vcpu;
5577 * Unpin any mmu pages first.
5579 kvm_for_each_vcpu(i, vcpu, kvm)
5580 kvm_unload_vcpu_mmu(vcpu);
5581 kvm_for_each_vcpu(i, vcpu, kvm)
5582 kvm_arch_vcpu_free(vcpu);
5584 mutex_lock(&kvm->lock);
5585 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
5586 kvm->vcpus[i] = NULL;
5588 atomic_set(&kvm->online_vcpus, 0);
5589 mutex_unlock(&kvm->lock);
5592 void kvm_arch_sync_events(struct kvm *kvm)
5594 kvm_free_all_assigned_devices(kvm);
5597 void kvm_arch_destroy_vm(struct kvm *kvm)
5599 kvm_iommu_unmap_guest(kvm);
5601 kfree(kvm->arch.vpic);
5602 kfree(kvm->arch.vioapic);
5603 kvm_free_vcpus(kvm);
5604 kvm_free_physmem(kvm);
5605 if (kvm->arch.apic_access_page)
5606 put_page(kvm->arch.apic_access_page);
5607 if (kvm->arch.ept_identity_pagetable)
5608 put_page(kvm->arch.ept_identity_pagetable);
5609 cleanup_srcu_struct(&kvm->srcu);
5610 kfree(kvm->arch.aliases);
5614 int kvm_arch_prepare_memory_region(struct kvm *kvm,
5615 struct kvm_memory_slot *memslot,
5616 struct kvm_memory_slot old,
5617 struct kvm_userspace_memory_region *mem,
5620 int npages = memslot->npages;
5622 /*To keep backward compatibility with older userspace,
5623 *x86 needs to hanlde !user_alloc case.
5626 if (npages && !old.rmap) {
5627 unsigned long userspace_addr;
5629 down_write(¤t->mm->mmap_sem);
5630 userspace_addr = do_mmap(NULL, 0,
5632 PROT_READ | PROT_WRITE,
5633 MAP_PRIVATE | MAP_ANONYMOUS,
5635 up_write(¤t->mm->mmap_sem);
5637 if (IS_ERR((void *)userspace_addr))
5638 return PTR_ERR((void *)userspace_addr);
5640 memslot->userspace_addr = userspace_addr;
5648 void kvm_arch_commit_memory_region(struct kvm *kvm,
5649 struct kvm_userspace_memory_region *mem,
5650 struct kvm_memory_slot old,
5654 int npages = mem->memory_size >> PAGE_SHIFT;
5656 if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
5659 down_write(¤t->mm->mmap_sem);
5660 ret = do_munmap(current->mm, old.userspace_addr,
5661 old.npages * PAGE_SIZE);
5662 up_write(¤t->mm->mmap_sem);
5665 "kvm_vm_ioctl_set_memory_region: "
5666 "failed to munmap memory\n");
5669 spin_lock(&kvm->mmu_lock);
5670 if (!kvm->arch.n_requested_mmu_pages) {
5671 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
5672 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
5675 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
5676 spin_unlock(&kvm->mmu_lock);
5679 void kvm_arch_flush_shadow(struct kvm *kvm)
5681 kvm_mmu_zap_all(kvm);
5682 kvm_reload_remote_mmus(kvm);
5685 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
5687 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE
5688 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
5689 || vcpu->arch.nmi_pending ||
5690 (kvm_arch_interrupt_allowed(vcpu) &&
5691 kvm_cpu_has_interrupt(vcpu));
5694 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
5697 int cpu = vcpu->cpu;
5699 if (waitqueue_active(&vcpu->wq)) {
5700 wake_up_interruptible(&vcpu->wq);
5701 ++vcpu->stat.halt_wakeup;
5705 if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
5706 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
5707 smp_send_reschedule(cpu);
5711 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
5713 return kvm_x86_ops->interrupt_allowed(vcpu);
5716 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
5718 unsigned long rflags;
5720 rflags = kvm_x86_ops->get_rflags(vcpu);
5721 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5722 rflags &= ~(unsigned long)(X86_EFLAGS_TF | X86_EFLAGS_RF);
5725 EXPORT_SYMBOL_GPL(kvm_get_rflags);
5727 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
5729 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
5730 vcpu->arch.singlestep_cs ==
5731 get_segment_selector(vcpu, VCPU_SREG_CS) &&
5732 vcpu->arch.singlestep_rip == kvm_rip_read(vcpu))
5733 rflags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
5734 kvm_x86_ops->set_rflags(vcpu, rflags);
5736 EXPORT_SYMBOL_GPL(kvm_set_rflags);
5738 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
5739 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
5740 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
5741 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
5742 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
5743 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
5744 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
5745 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
5746 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
5747 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
5748 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);