]> err.no Git - linux-2.6/commitdiff
KVM: Portability: Move x86 vcpu ioctl handlers to x86.c
authorHollis Blanchard <hollisb@us.ibm.com>
Thu, 1 Nov 2007 19:16:10 +0000 (14:16 -0500)
committerAvi Kivity <avi@qumranet.com>
Wed, 30 Jan 2008 15:53:00 +0000 (17:53 +0200)
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
drivers/kvm/kvm.h
drivers/kvm/kvm_main.c
drivers/kvm/x86.c

index 469ca42c2a19e224f7a473ab54bed7cd451db1e5..3f5ffc37480df3eac5863e64baf9a7926f5fe20d 100644 (file)
@@ -636,6 +636,16 @@ void kvm_arch_destroy_vm(struct kvm *kvm);
 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 
+int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
+int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
+int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
+                                 struct kvm_sregs *sregs);
+int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
+                                 struct kvm_sregs *sregs);
+int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
+                                   struct kvm_debug_guest *dbg);
+int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
+
 __init void kvm_arch_init(void);
 
 static inline void kvm_guest_enter(void)
index 7230f48ba08e0df879cbd15ddbef40f57d62a559..8665531d92876698a211cb6a48505e04ad5a7f0d 100644 (file)
@@ -778,422 +778,6 @@ void kvm_resched(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_resched);
 
-/*
- * Check if userspace requested an interrupt window, and that the
- * interrupt window is open.
- *
- * No need to exit to userspace if we already have an interrupt queued.
- */
-static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
-                                         struct kvm_run *kvm_run)
-{
-       return (!vcpu->irq_summary &&
-               kvm_run->request_interrupt_window &&
-               vcpu->interrupt_window_open &&
-               (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
-}
-
-static void post_kvm_run_save(struct kvm_vcpu *vcpu,
-                             struct kvm_run *kvm_run)
-{
-       kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
-       kvm_run->cr8 = get_cr8(vcpu);
-       kvm_run->apic_base = kvm_get_apic_base(vcpu);
-       if (irqchip_in_kernel(vcpu->kvm))
-               kvm_run->ready_for_interrupt_injection = 1;
-       else
-               kvm_run->ready_for_interrupt_injection =
-                                       (vcpu->interrupt_window_open &&
-                                        vcpu->irq_summary == 0);
-}
-
-static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
-       int r;
-
-       if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
-               pr_debug("vcpu %d received sipi with vector # %x\n",
-                      vcpu->vcpu_id, vcpu->sipi_vector);
-               kvm_lapic_reset(vcpu);
-               r = kvm_x86_ops->vcpu_reset(vcpu);
-               if (r)
-                       return r;
-               vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
-       }
-
-preempted:
-       if (vcpu->guest_debug.enabled)
-               kvm_x86_ops->guest_debug_pre(vcpu);
-
-again:
-       r = kvm_mmu_reload(vcpu);
-       if (unlikely(r))
-               goto out;
-
-       kvm_inject_pending_timer_irqs(vcpu);
-
-       preempt_disable();
-
-       kvm_x86_ops->prepare_guest_switch(vcpu);
-       kvm_load_guest_fpu(vcpu);
-
-       local_irq_disable();
-
-       if (signal_pending(current)) {
-               local_irq_enable();
-               preempt_enable();
-               r = -EINTR;
-               kvm_run->exit_reason = KVM_EXIT_INTR;
-               ++vcpu->stat.signal_exits;
-               goto out;
-       }
-
-       if (irqchip_in_kernel(vcpu->kvm))
-               kvm_x86_ops->inject_pending_irq(vcpu);
-       else if (!vcpu->mmio_read_completed)
-               kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
-
-       vcpu->guest_mode = 1;
-       kvm_guest_enter();
-
-       if (vcpu->requests)
-               if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
-                       kvm_x86_ops->tlb_flush(vcpu);
-
-       kvm_x86_ops->run(vcpu, kvm_run);
-
-       vcpu->guest_mode = 0;
-       local_irq_enable();
-
-       ++vcpu->stat.exits;
-
-       /*
-        * We must have an instruction between local_irq_enable() and
-        * kvm_guest_exit(), so the timer interrupt isn't delayed by
-        * the interrupt shadow.  The stat.exits increment will do nicely.
-        * But we need to prevent reordering, hence this barrier():
-        */
-       barrier();
-
-       kvm_guest_exit();
-
-       preempt_enable();
-
-       /*
-        * Profile KVM exit RIPs:
-        */
-       if (unlikely(prof_on == KVM_PROFILING)) {
-               kvm_x86_ops->cache_regs(vcpu);
-               profile_hit(KVM_PROFILING, (void *)vcpu->rip);
-       }
-
-       r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
-
-       if (r > 0) {
-               if (dm_request_for_irq_injection(vcpu, kvm_run)) {
-                       r = -EINTR;
-                       kvm_run->exit_reason = KVM_EXIT_INTR;
-                       ++vcpu->stat.request_irq_exits;
-                       goto out;
-               }
-               if (!need_resched()) {
-                       ++vcpu->stat.light_exits;
-                       goto again;
-               }
-       }
-
-out:
-       if (r > 0) {
-               kvm_resched(vcpu);
-               goto preempted;
-       }
-
-       post_kvm_run_save(vcpu, kvm_run);
-
-       return r;
-}
-
-
-static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
-       int r;
-       sigset_t sigsaved;
-
-       vcpu_load(vcpu);
-
-       if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
-               kvm_vcpu_block(vcpu);
-               vcpu_put(vcpu);
-               return -EAGAIN;
-       }
-
-       if (vcpu->sigset_active)
-               sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
-
-       /* re-sync apic's tpr */
-       if (!irqchip_in_kernel(vcpu->kvm))
-               set_cr8(vcpu, kvm_run->cr8);
-
-       if (vcpu->pio.cur_count) {
-               r = complete_pio(vcpu);
-               if (r)
-                       goto out;
-       }
-#if CONFIG_HAS_IOMEM
-       if (vcpu->mmio_needed) {
-               memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
-               vcpu->mmio_read_completed = 1;
-               vcpu->mmio_needed = 0;
-               r = emulate_instruction(vcpu, kvm_run,
-                                       vcpu->mmio_fault_cr2, 0, 1);
-               if (r == EMULATE_DO_MMIO) {
-                       /*
-                        * Read-modify-write.  Back to userspace.
-                        */
-                       r = 0;
-                       goto out;
-               }
-       }
-#endif
-       if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
-               kvm_x86_ops->cache_regs(vcpu);
-               vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
-               kvm_x86_ops->decache_regs(vcpu);
-       }
-
-       r = __vcpu_run(vcpu, kvm_run);
-
-out:
-       if (vcpu->sigset_active)
-               sigprocmask(SIG_SETMASK, &sigsaved, NULL);
-
-       vcpu_put(vcpu);
-       return r;
-}
-
-static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
-                                  struct kvm_regs *regs)
-{
-       vcpu_load(vcpu);
-
-       kvm_x86_ops->cache_regs(vcpu);
-
-       regs->rax = vcpu->regs[VCPU_REGS_RAX];
-       regs->rbx = vcpu->regs[VCPU_REGS_RBX];
-       regs->rcx = vcpu->regs[VCPU_REGS_RCX];
-       regs->rdx = vcpu->regs[VCPU_REGS_RDX];
-       regs->rsi = vcpu->regs[VCPU_REGS_RSI];
-       regs->rdi = vcpu->regs[VCPU_REGS_RDI];
-       regs->rsp = vcpu->regs[VCPU_REGS_RSP];
-       regs->rbp = vcpu->regs[VCPU_REGS_RBP];
-#ifdef CONFIG_X86_64
-       regs->r8 = vcpu->regs[VCPU_REGS_R8];
-       regs->r9 = vcpu->regs[VCPU_REGS_R9];
-       regs->r10 = vcpu->regs[VCPU_REGS_R10];
-       regs->r11 = vcpu->regs[VCPU_REGS_R11];
-       regs->r12 = vcpu->regs[VCPU_REGS_R12];
-       regs->r13 = vcpu->regs[VCPU_REGS_R13];
-       regs->r14 = vcpu->regs[VCPU_REGS_R14];
-       regs->r15 = vcpu->regs[VCPU_REGS_R15];
-#endif
-
-       regs->rip = vcpu->rip;
-       regs->rflags = kvm_x86_ops->get_rflags(vcpu);
-
-       /*
-        * Don't leak debug flags in case they were set for guest debugging
-        */
-       if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
-               regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
-
-       vcpu_put(vcpu);
-
-       return 0;
-}
-
-static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
-                                  struct kvm_regs *regs)
-{
-       vcpu_load(vcpu);
-
-       vcpu->regs[VCPU_REGS_RAX] = regs->rax;
-       vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
-       vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
-       vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
-       vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
-       vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
-       vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
-       vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
-#ifdef CONFIG_X86_64
-       vcpu->regs[VCPU_REGS_R8] = regs->r8;
-       vcpu->regs[VCPU_REGS_R9] = regs->r9;
-       vcpu->regs[VCPU_REGS_R10] = regs->r10;
-       vcpu->regs[VCPU_REGS_R11] = regs->r11;
-       vcpu->regs[VCPU_REGS_R12] = regs->r12;
-       vcpu->regs[VCPU_REGS_R13] = regs->r13;
-       vcpu->regs[VCPU_REGS_R14] = regs->r14;
-       vcpu->regs[VCPU_REGS_R15] = regs->r15;
-#endif
-
-       vcpu->rip = regs->rip;
-       kvm_x86_ops->set_rflags(vcpu, regs->rflags);
-
-       kvm_x86_ops->decache_regs(vcpu);
-
-       vcpu_put(vcpu);
-
-       return 0;
-}
-
-static void get_segment(struct kvm_vcpu *vcpu,
-                       struct kvm_segment *var, int seg)
-{
-       return kvm_x86_ops->get_segment(vcpu, var, seg);
-}
-
-static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
-                                   struct kvm_sregs *sregs)
-{
-       struct descriptor_table dt;
-       int pending_vec;
-
-       vcpu_load(vcpu);
-
-       get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
-       get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
-       get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
-       get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
-       get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
-       get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
-
-       get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
-       get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
-
-       kvm_x86_ops->get_idt(vcpu, &dt);
-       sregs->idt.limit = dt.limit;
-       sregs->idt.base = dt.base;
-       kvm_x86_ops->get_gdt(vcpu, &dt);
-       sregs->gdt.limit = dt.limit;
-       sregs->gdt.base = dt.base;
-
-       kvm_x86_ops->decache_cr4_guest_bits(vcpu);
-       sregs->cr0 = vcpu->cr0;
-       sregs->cr2 = vcpu->cr2;
-       sregs->cr3 = vcpu->cr3;
-       sregs->cr4 = vcpu->cr4;
-       sregs->cr8 = get_cr8(vcpu);
-       sregs->efer = vcpu->shadow_efer;
-       sregs->apic_base = kvm_get_apic_base(vcpu);
-
-       if (irqchip_in_kernel(vcpu->kvm)) {
-               memset(sregs->interrupt_bitmap, 0,
-                      sizeof sregs->interrupt_bitmap);
-               pending_vec = kvm_x86_ops->get_irq(vcpu);
-               if (pending_vec >= 0)
-                       set_bit(pending_vec,
-                               (unsigned long *)sregs->interrupt_bitmap);
-       } else
-               memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
-                      sizeof sregs->interrupt_bitmap);
-
-       vcpu_put(vcpu);
-
-       return 0;
-}
-
-static void set_segment(struct kvm_vcpu *vcpu,
-                       struct kvm_segment *var, int seg)
-{
-       return kvm_x86_ops->set_segment(vcpu, var, seg);
-}
-
-static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
-                                   struct kvm_sregs *sregs)
-{
-       int mmu_reset_needed = 0;
-       int i, pending_vec, max_bits;
-       struct descriptor_table dt;
-
-       vcpu_load(vcpu);
-
-       dt.limit = sregs->idt.limit;
-       dt.base = sregs->idt.base;
-       kvm_x86_ops->set_idt(vcpu, &dt);
-       dt.limit = sregs->gdt.limit;
-       dt.base = sregs->gdt.base;
-       kvm_x86_ops->set_gdt(vcpu, &dt);
-
-       vcpu->cr2 = sregs->cr2;
-       mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
-       vcpu->cr3 = sregs->cr3;
-
-       set_cr8(vcpu, sregs->cr8);
-
-       mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
-#ifdef CONFIG_X86_64
-       kvm_x86_ops->set_efer(vcpu, sregs->efer);
-#endif
-       kvm_set_apic_base(vcpu, sregs->apic_base);
-
-       kvm_x86_ops->decache_cr4_guest_bits(vcpu);
-
-       mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
-       vcpu->cr0 = sregs->cr0;
-       kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
-
-       mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
-       kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
-       if (!is_long_mode(vcpu) && is_pae(vcpu))
-               load_pdptrs(vcpu, vcpu->cr3);
-
-       if (mmu_reset_needed)
-               kvm_mmu_reset_context(vcpu);
-
-       if (!irqchip_in_kernel(vcpu->kvm)) {
-               memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
-                      sizeof vcpu->irq_pending);
-               vcpu->irq_summary = 0;
-               for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
-                       if (vcpu->irq_pending[i])
-                               __set_bit(i, &vcpu->irq_summary);
-       } else {
-               max_bits = (sizeof sregs->interrupt_bitmap) << 3;
-               pending_vec = find_first_bit(
-                       (const unsigned long *)sregs->interrupt_bitmap,
-                       max_bits);
-               /* Only pending external irq is handled here */
-               if (pending_vec < max_bits) {
-                       kvm_x86_ops->set_irq(vcpu, pending_vec);
-                       pr_debug("Set back pending irq %d\n",
-                                pending_vec);
-               }
-       }
-
-       set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
-       set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
-       set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
-       set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
-       set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
-       set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
-
-       set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
-       set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
-
-       vcpu_put(vcpu);
-
-       return 0;
-}
-
-void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
-{
-       struct kvm_segment cs;
-
-       get_segment(vcpu, &cs, VCPU_SREG_CS);
-       *db = cs.db;
-       *l = cs.l;
-}
-EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
-
 /*
  * Translate a guest virtual address to a guest physical address.
  */
@@ -1233,20 +817,6 @@ static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
        return 0;
 }
 
-static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
-                                     struct kvm_debug_guest *dbg)
-{
-       int r;
-
-       vcpu_load(vcpu);
-
-       r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
-
-       vcpu_put(vcpu);
-
-       return r;
-}
-
 static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
                                    unsigned long address,
                                    int *type)
@@ -1392,13 +962,13 @@ static long kvm_vcpu_ioctl(struct file *filp,
                r = -EINVAL;
                if (arg)
                        goto out;
-               r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
+               r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
                break;
        case KVM_GET_REGS: {
                struct kvm_regs kvm_regs;
 
                memset(&kvm_regs, 0, sizeof kvm_regs);
-               r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
+               r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
                if (r)
                        goto out;
                r = -EFAULT;
@@ -1413,7 +983,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
                r = -EFAULT;
                if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
                        goto out;
-               r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
+               r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
                if (r)
                        goto out;
                r = 0;
@@ -1423,7 +993,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
                struct kvm_sregs kvm_sregs;
 
                memset(&kvm_sregs, 0, sizeof kvm_sregs);
-               r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
+               r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
                if (r)
                        goto out;
                r = -EFAULT;
@@ -1438,7 +1008,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
                r = -EFAULT;
                if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
                        goto out;
-               r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
+               r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
                if (r)
                        goto out;
                r = 0;
@@ -1477,7 +1047,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
                r = -EFAULT;
                if (copy_from_user(&dbg, argp, sizeof dbg))
                        goto out;
-               r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
+               r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
                if (r)
                        goto out;
                r = 0;
index ef1661f10b484ec70cd600291a090f6e54e39e2c..394da6605364b0aa9bfa3dd1eb01fbd43e562cc3 100644 (file)
@@ -1786,6 +1786,433 @@ void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
 
+/*
+ * Check if userspace requested an interrupt window, and that the
+ * interrupt window is open.
+ *
+ * No need to exit to userspace if we already have an interrupt queued.
+ */
+static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
+                                         struct kvm_run *kvm_run)
+{
+       return (!vcpu->irq_summary &&
+               kvm_run->request_interrupt_window &&
+               vcpu->interrupt_window_open &&
+               (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
+}
+
+static void post_kvm_run_save(struct kvm_vcpu *vcpu,
+                             struct kvm_run *kvm_run)
+{
+       kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
+       kvm_run->cr8 = get_cr8(vcpu);
+       kvm_run->apic_base = kvm_get_apic_base(vcpu);
+       if (irqchip_in_kernel(vcpu->kvm))
+               kvm_run->ready_for_interrupt_injection = 1;
+       else
+               kvm_run->ready_for_interrupt_injection =
+                                       (vcpu->interrupt_window_open &&
+                                        vcpu->irq_summary == 0);
+}
+
+static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       int r;
+
+       if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
+               pr_debug("vcpu %d received sipi with vector # %x\n",
+                      vcpu->vcpu_id, vcpu->sipi_vector);
+               kvm_lapic_reset(vcpu);
+               r = kvm_x86_ops->vcpu_reset(vcpu);
+               if (r)
+                       return r;
+               vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
+       }
+
+preempted:
+       if (vcpu->guest_debug.enabled)
+               kvm_x86_ops->guest_debug_pre(vcpu);
+
+again:
+       r = kvm_mmu_reload(vcpu);
+       if (unlikely(r))
+               goto out;
+
+       kvm_inject_pending_timer_irqs(vcpu);
+
+       preempt_disable();
+
+       kvm_x86_ops->prepare_guest_switch(vcpu);
+       kvm_load_guest_fpu(vcpu);
+
+       local_irq_disable();
+
+       if (signal_pending(current)) {
+               local_irq_enable();
+               preempt_enable();
+               r = -EINTR;
+               kvm_run->exit_reason = KVM_EXIT_INTR;
+               ++vcpu->stat.signal_exits;
+               goto out;
+       }
+
+       if (irqchip_in_kernel(vcpu->kvm))
+               kvm_x86_ops->inject_pending_irq(vcpu);
+       else if (!vcpu->mmio_read_completed)
+               kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
+
+       vcpu->guest_mode = 1;
+       kvm_guest_enter();
+
+       if (vcpu->requests)
+               if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
+                       kvm_x86_ops->tlb_flush(vcpu);
+
+       kvm_x86_ops->run(vcpu, kvm_run);
+
+       vcpu->guest_mode = 0;
+       local_irq_enable();
+
+       ++vcpu->stat.exits;
+
+       /*
+        * We must have an instruction between local_irq_enable() and
+        * kvm_guest_exit(), so the timer interrupt isn't delayed by
+        * the interrupt shadow.  The stat.exits increment will do nicely.
+        * But we need to prevent reordering, hence this barrier():
+        */
+       barrier();
+
+       kvm_guest_exit();
+
+       preempt_enable();
+
+       /*
+        * Profile KVM exit RIPs:
+        */
+       if (unlikely(prof_on == KVM_PROFILING)) {
+               kvm_x86_ops->cache_regs(vcpu);
+               profile_hit(KVM_PROFILING, (void *)vcpu->rip);
+       }
+
+       r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
+
+       if (r > 0) {
+               if (dm_request_for_irq_injection(vcpu, kvm_run)) {
+                       r = -EINTR;
+                       kvm_run->exit_reason = KVM_EXIT_INTR;
+                       ++vcpu->stat.request_irq_exits;
+                       goto out;
+               }
+               if (!need_resched()) {
+                       ++vcpu->stat.light_exits;
+                       goto again;
+               }
+       }
+
+out:
+       if (r > 0) {
+               kvm_resched(vcpu);
+               goto preempted;
+       }
+
+       post_kvm_run_save(vcpu, kvm_run);
+
+       return r;
+}
+
+int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+       int r;
+       sigset_t sigsaved;
+
+       vcpu_load(vcpu);
+
+       if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
+               kvm_vcpu_block(vcpu);
+               vcpu_put(vcpu);
+               return -EAGAIN;
+       }
+
+       if (vcpu->sigset_active)
+               sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
+
+       /* re-sync apic's tpr */
+       if (!irqchip_in_kernel(vcpu->kvm))
+               set_cr8(vcpu, kvm_run->cr8);
+
+       if (vcpu->pio.cur_count) {
+               r = complete_pio(vcpu);
+               if (r)
+                       goto out;
+       }
+#if CONFIG_HAS_IOMEM
+       if (vcpu->mmio_needed) {
+               memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
+               vcpu->mmio_read_completed = 1;
+               vcpu->mmio_needed = 0;
+               r = emulate_instruction(vcpu, kvm_run,
+                                       vcpu->mmio_fault_cr2, 0, 1);
+               if (r == EMULATE_DO_MMIO) {
+                       /*
+                        * Read-modify-write.  Back to userspace.
+                        */
+                       r = 0;
+                       goto out;
+               }
+       }
+#endif
+       if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
+               kvm_x86_ops->cache_regs(vcpu);
+               vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
+               kvm_x86_ops->decache_regs(vcpu);
+       }
+
+       r = __vcpu_run(vcpu, kvm_run);
+
+out:
+       if (vcpu->sigset_active)
+               sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+       vcpu_put(vcpu);
+       return r;
+}
+
+int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+       vcpu_load(vcpu);
+
+       kvm_x86_ops->cache_regs(vcpu);
+
+       regs->rax = vcpu->regs[VCPU_REGS_RAX];
+       regs->rbx = vcpu->regs[VCPU_REGS_RBX];
+       regs->rcx = vcpu->regs[VCPU_REGS_RCX];
+       regs->rdx = vcpu->regs[VCPU_REGS_RDX];
+       regs->rsi = vcpu->regs[VCPU_REGS_RSI];
+       regs->rdi = vcpu->regs[VCPU_REGS_RDI];
+       regs->rsp = vcpu->regs[VCPU_REGS_RSP];
+       regs->rbp = vcpu->regs[VCPU_REGS_RBP];
+#ifdef CONFIG_X86_64
+       regs->r8 = vcpu->regs[VCPU_REGS_R8];
+       regs->r9 = vcpu->regs[VCPU_REGS_R9];
+       regs->r10 = vcpu->regs[VCPU_REGS_R10];
+       regs->r11 = vcpu->regs[VCPU_REGS_R11];
+       regs->r12 = vcpu->regs[VCPU_REGS_R12];
+       regs->r13 = vcpu->regs[VCPU_REGS_R13];
+       regs->r14 = vcpu->regs[VCPU_REGS_R14];
+       regs->r15 = vcpu->regs[VCPU_REGS_R15];
+#endif
+
+       regs->rip = vcpu->rip;
+       regs->rflags = kvm_x86_ops->get_rflags(vcpu);
+
+       /*
+        * Don't leak debug flags in case they were set for guest debugging
+        */
+       if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
+               regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
+
+       vcpu_put(vcpu);
+
+       return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+       vcpu_load(vcpu);
+
+       vcpu->regs[VCPU_REGS_RAX] = regs->rax;
+       vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
+       vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
+       vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
+       vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
+       vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
+       vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
+       vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
+#ifdef CONFIG_X86_64
+       vcpu->regs[VCPU_REGS_R8] = regs->r8;
+       vcpu->regs[VCPU_REGS_R9] = regs->r9;
+       vcpu->regs[VCPU_REGS_R10] = regs->r10;
+       vcpu->regs[VCPU_REGS_R11] = regs->r11;
+       vcpu->regs[VCPU_REGS_R12] = regs->r12;
+       vcpu->regs[VCPU_REGS_R13] = regs->r13;
+       vcpu->regs[VCPU_REGS_R14] = regs->r14;
+       vcpu->regs[VCPU_REGS_R15] = regs->r15;
+#endif
+
+       vcpu->rip = regs->rip;
+       kvm_x86_ops->set_rflags(vcpu, regs->rflags);
+
+       kvm_x86_ops->decache_regs(vcpu);
+
+       vcpu_put(vcpu);
+
+       return 0;
+}
+
+static void get_segment(struct kvm_vcpu *vcpu,
+                       struct kvm_segment *var, int seg)
+{
+       return kvm_x86_ops->get_segment(vcpu, var, seg);
+}
+
+void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
+{
+       struct kvm_segment cs;
+
+       get_segment(vcpu, &cs, VCPU_SREG_CS);
+       *db = cs.db;
+       *l = cs.l;
+}
+EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
+
+int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
+                                 struct kvm_sregs *sregs)
+{
+       struct descriptor_table dt;
+       int pending_vec;
+
+       vcpu_load(vcpu);
+
+       get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
+       get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
+       get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
+       get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
+       get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
+       get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
+
+       get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
+       get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
+
+       kvm_x86_ops->get_idt(vcpu, &dt);
+       sregs->idt.limit = dt.limit;
+       sregs->idt.base = dt.base;
+       kvm_x86_ops->get_gdt(vcpu, &dt);
+       sregs->gdt.limit = dt.limit;
+       sregs->gdt.base = dt.base;
+
+       kvm_x86_ops->decache_cr4_guest_bits(vcpu);
+       sregs->cr0 = vcpu->cr0;
+       sregs->cr2 = vcpu->cr2;
+       sregs->cr3 = vcpu->cr3;
+       sregs->cr4 = vcpu->cr4;
+       sregs->cr8 = get_cr8(vcpu);
+       sregs->efer = vcpu->shadow_efer;
+       sregs->apic_base = kvm_get_apic_base(vcpu);
+
+       if (irqchip_in_kernel(vcpu->kvm)) {
+               memset(sregs->interrupt_bitmap, 0,
+                      sizeof sregs->interrupt_bitmap);
+               pending_vec = kvm_x86_ops->get_irq(vcpu);
+               if (pending_vec >= 0)
+                       set_bit(pending_vec,
+                               (unsigned long *)sregs->interrupt_bitmap);
+       } else
+               memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
+                      sizeof sregs->interrupt_bitmap);
+
+       vcpu_put(vcpu);
+
+       return 0;
+}
+
+static void set_segment(struct kvm_vcpu *vcpu,
+                       struct kvm_segment *var, int seg)
+{
+       return kvm_x86_ops->set_segment(vcpu, var, seg);
+}
+
+int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
+                                 struct kvm_sregs *sregs)
+{
+       int mmu_reset_needed = 0;
+       int i, pending_vec, max_bits;
+       struct descriptor_table dt;
+
+       vcpu_load(vcpu);
+
+       dt.limit = sregs->idt.limit;
+       dt.base = sregs->idt.base;
+       kvm_x86_ops->set_idt(vcpu, &dt);
+       dt.limit = sregs->gdt.limit;
+       dt.base = sregs->gdt.base;
+       kvm_x86_ops->set_gdt(vcpu, &dt);
+
+       vcpu->cr2 = sregs->cr2;
+       mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
+       vcpu->cr3 = sregs->cr3;
+
+       set_cr8(vcpu, sregs->cr8);
+
+       mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
+#ifdef CONFIG_X86_64
+       kvm_x86_ops->set_efer(vcpu, sregs->efer);
+#endif
+       kvm_set_apic_base(vcpu, sregs->apic_base);
+
+       kvm_x86_ops->decache_cr4_guest_bits(vcpu);
+
+       mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
+       vcpu->cr0 = sregs->cr0;
+       kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
+
+       mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
+       kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
+       if (!is_long_mode(vcpu) && is_pae(vcpu))
+               load_pdptrs(vcpu, vcpu->cr3);
+
+       if (mmu_reset_needed)
+               kvm_mmu_reset_context(vcpu);
+
+       if (!irqchip_in_kernel(vcpu->kvm)) {
+               memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
+                      sizeof vcpu->irq_pending);
+               vcpu->irq_summary = 0;
+               for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
+                       if (vcpu->irq_pending[i])
+                               __set_bit(i, &vcpu->irq_summary);
+       } else {
+               max_bits = (sizeof sregs->interrupt_bitmap) << 3;
+               pending_vec = find_first_bit(
+                       (const unsigned long *)sregs->interrupt_bitmap,
+                       max_bits);
+               /* Only pending external irq is handled here */
+               if (pending_vec < max_bits) {
+                       kvm_x86_ops->set_irq(vcpu, pending_vec);
+                       pr_debug("Set back pending irq %d\n",
+                                pending_vec);
+               }
+       }
+
+       set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
+       set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
+       set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
+       set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
+       set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
+       set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
+
+       set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
+       set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
+
+       vcpu_put(vcpu);
+
+       return 0;
+}
+
+int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
+                                   struct kvm_debug_guest *dbg)
+{
+       int r;
+
+       vcpu_load(vcpu);
+
+       r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
+
+       vcpu_put(vcpu);
+
+       return r;
+}
+
 /*
  * fxsave fpu state.  Taken from x86_64/processor.h.  To be killed when
  * we have asm/x86/processor.h