KVM: Portability: Move x86 vcpu ioctl handlers to x86.c
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Hollis Blanchard
Avi Kivity
parent
d075206073
commit
b6c7a5dccf
3 changed files with 443 additions and 436 deletions
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@ -636,6 +636,16 @@ void kvm_arch_destroy_vm(struct kvm *kvm);
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int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
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int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
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int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
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int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
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int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs);
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int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs);
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int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
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struct kvm_debug_guest *dbg);
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int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
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__init void kvm_arch_init(void);
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static inline void kvm_guest_enter(void)
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@ -778,422 +778,6 @@ void kvm_resched(struct kvm_vcpu *vcpu)
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}
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EXPORT_SYMBOL_GPL(kvm_resched);
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/*
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* Check if userspace requested an interrupt window, and that the
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* interrupt window is open.
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*
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* No need to exit to userspace if we already have an interrupt queued.
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*/
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static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
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struct kvm_run *kvm_run)
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{
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return (!vcpu->irq_summary &&
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kvm_run->request_interrupt_window &&
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vcpu->interrupt_window_open &&
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(kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
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}
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static void post_kvm_run_save(struct kvm_vcpu *vcpu,
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struct kvm_run *kvm_run)
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{
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kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
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kvm_run->cr8 = get_cr8(vcpu);
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kvm_run->apic_base = kvm_get_apic_base(vcpu);
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if (irqchip_in_kernel(vcpu->kvm))
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kvm_run->ready_for_interrupt_injection = 1;
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else
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kvm_run->ready_for_interrupt_injection =
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(vcpu->interrupt_window_open &&
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vcpu->irq_summary == 0);
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}
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static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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int r;
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if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
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pr_debug("vcpu %d received sipi with vector # %x\n",
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vcpu->vcpu_id, vcpu->sipi_vector);
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kvm_lapic_reset(vcpu);
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r = kvm_x86_ops->vcpu_reset(vcpu);
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if (r)
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return r;
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vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
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}
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preempted:
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if (vcpu->guest_debug.enabled)
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kvm_x86_ops->guest_debug_pre(vcpu);
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again:
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r = kvm_mmu_reload(vcpu);
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if (unlikely(r))
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goto out;
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kvm_inject_pending_timer_irqs(vcpu);
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preempt_disable();
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kvm_x86_ops->prepare_guest_switch(vcpu);
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kvm_load_guest_fpu(vcpu);
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local_irq_disable();
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if (signal_pending(current)) {
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local_irq_enable();
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preempt_enable();
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r = -EINTR;
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kvm_run->exit_reason = KVM_EXIT_INTR;
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++vcpu->stat.signal_exits;
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goto out;
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}
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if (irqchip_in_kernel(vcpu->kvm))
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kvm_x86_ops->inject_pending_irq(vcpu);
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else if (!vcpu->mmio_read_completed)
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kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
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vcpu->guest_mode = 1;
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kvm_guest_enter();
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if (vcpu->requests)
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if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
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kvm_x86_ops->tlb_flush(vcpu);
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kvm_x86_ops->run(vcpu, kvm_run);
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vcpu->guest_mode = 0;
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local_irq_enable();
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++vcpu->stat.exits;
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/*
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* We must have an instruction between local_irq_enable() and
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* kvm_guest_exit(), so the timer interrupt isn't delayed by
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* the interrupt shadow. The stat.exits increment will do nicely.
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* But we need to prevent reordering, hence this barrier():
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*/
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barrier();
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kvm_guest_exit();
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preempt_enable();
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/*
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* Profile KVM exit RIPs:
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*/
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if (unlikely(prof_on == KVM_PROFILING)) {
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kvm_x86_ops->cache_regs(vcpu);
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profile_hit(KVM_PROFILING, (void *)vcpu->rip);
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}
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r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
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if (r > 0) {
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if (dm_request_for_irq_injection(vcpu, kvm_run)) {
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r = -EINTR;
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kvm_run->exit_reason = KVM_EXIT_INTR;
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++vcpu->stat.request_irq_exits;
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goto out;
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}
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if (!need_resched()) {
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++vcpu->stat.light_exits;
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goto again;
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}
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}
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out:
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if (r > 0) {
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kvm_resched(vcpu);
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goto preempted;
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}
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post_kvm_run_save(vcpu, kvm_run);
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return r;
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}
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static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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int r;
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sigset_t sigsaved;
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vcpu_load(vcpu);
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if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
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kvm_vcpu_block(vcpu);
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vcpu_put(vcpu);
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return -EAGAIN;
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}
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if (vcpu->sigset_active)
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sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
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/* re-sync apic's tpr */
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if (!irqchip_in_kernel(vcpu->kvm))
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set_cr8(vcpu, kvm_run->cr8);
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if (vcpu->pio.cur_count) {
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r = complete_pio(vcpu);
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if (r)
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goto out;
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}
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#if CONFIG_HAS_IOMEM
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if (vcpu->mmio_needed) {
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memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
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vcpu->mmio_read_completed = 1;
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vcpu->mmio_needed = 0;
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r = emulate_instruction(vcpu, kvm_run,
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vcpu->mmio_fault_cr2, 0, 1);
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if (r == EMULATE_DO_MMIO) {
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/*
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* Read-modify-write. Back to userspace.
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*/
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r = 0;
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goto out;
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}
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}
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#endif
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if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
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kvm_x86_ops->cache_regs(vcpu);
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vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
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kvm_x86_ops->decache_regs(vcpu);
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}
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r = __vcpu_run(vcpu, kvm_run);
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out:
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if (vcpu->sigset_active)
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sigprocmask(SIG_SETMASK, &sigsaved, NULL);
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vcpu_put(vcpu);
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return r;
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}
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static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
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struct kvm_regs *regs)
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{
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vcpu_load(vcpu);
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kvm_x86_ops->cache_regs(vcpu);
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regs->rax = vcpu->regs[VCPU_REGS_RAX];
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regs->rbx = vcpu->regs[VCPU_REGS_RBX];
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regs->rcx = vcpu->regs[VCPU_REGS_RCX];
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regs->rdx = vcpu->regs[VCPU_REGS_RDX];
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regs->rsi = vcpu->regs[VCPU_REGS_RSI];
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regs->rdi = vcpu->regs[VCPU_REGS_RDI];
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regs->rsp = vcpu->regs[VCPU_REGS_RSP];
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regs->rbp = vcpu->regs[VCPU_REGS_RBP];
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#ifdef CONFIG_X86_64
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regs->r8 = vcpu->regs[VCPU_REGS_R8];
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regs->r9 = vcpu->regs[VCPU_REGS_R9];
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regs->r10 = vcpu->regs[VCPU_REGS_R10];
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regs->r11 = vcpu->regs[VCPU_REGS_R11];
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regs->r12 = vcpu->regs[VCPU_REGS_R12];
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regs->r13 = vcpu->regs[VCPU_REGS_R13];
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regs->r14 = vcpu->regs[VCPU_REGS_R14];
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regs->r15 = vcpu->regs[VCPU_REGS_R15];
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#endif
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regs->rip = vcpu->rip;
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regs->rflags = kvm_x86_ops->get_rflags(vcpu);
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/*
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* Don't leak debug flags in case they were set for guest debugging
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*/
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if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
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regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
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vcpu_put(vcpu);
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return 0;
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}
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static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
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struct kvm_regs *regs)
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{
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vcpu_load(vcpu);
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vcpu->regs[VCPU_REGS_RAX] = regs->rax;
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vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
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vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
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vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
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vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
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vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
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vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
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vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
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#ifdef CONFIG_X86_64
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vcpu->regs[VCPU_REGS_R8] = regs->r8;
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vcpu->regs[VCPU_REGS_R9] = regs->r9;
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vcpu->regs[VCPU_REGS_R10] = regs->r10;
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vcpu->regs[VCPU_REGS_R11] = regs->r11;
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vcpu->regs[VCPU_REGS_R12] = regs->r12;
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vcpu->regs[VCPU_REGS_R13] = regs->r13;
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vcpu->regs[VCPU_REGS_R14] = regs->r14;
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vcpu->regs[VCPU_REGS_R15] = regs->r15;
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#endif
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vcpu->rip = regs->rip;
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kvm_x86_ops->set_rflags(vcpu, regs->rflags);
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kvm_x86_ops->decache_regs(vcpu);
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vcpu_put(vcpu);
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return 0;
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}
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static void get_segment(struct kvm_vcpu *vcpu,
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struct kvm_segment *var, int seg)
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{
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return kvm_x86_ops->get_segment(vcpu, var, seg);
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}
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static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs)
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{
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struct descriptor_table dt;
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int pending_vec;
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vcpu_load(vcpu);
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get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
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get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
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get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
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get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
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get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
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get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
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get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
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get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
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kvm_x86_ops->get_idt(vcpu, &dt);
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sregs->idt.limit = dt.limit;
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sregs->idt.base = dt.base;
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kvm_x86_ops->get_gdt(vcpu, &dt);
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sregs->gdt.limit = dt.limit;
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sregs->gdt.base = dt.base;
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kvm_x86_ops->decache_cr4_guest_bits(vcpu);
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sregs->cr0 = vcpu->cr0;
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sregs->cr2 = vcpu->cr2;
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sregs->cr3 = vcpu->cr3;
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sregs->cr4 = vcpu->cr4;
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sregs->cr8 = get_cr8(vcpu);
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sregs->efer = vcpu->shadow_efer;
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sregs->apic_base = kvm_get_apic_base(vcpu);
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if (irqchip_in_kernel(vcpu->kvm)) {
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memset(sregs->interrupt_bitmap, 0,
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sizeof sregs->interrupt_bitmap);
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pending_vec = kvm_x86_ops->get_irq(vcpu);
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if (pending_vec >= 0)
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set_bit(pending_vec,
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(unsigned long *)sregs->interrupt_bitmap);
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} else
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memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
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sizeof sregs->interrupt_bitmap);
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vcpu_put(vcpu);
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return 0;
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}
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static void set_segment(struct kvm_vcpu *vcpu,
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struct kvm_segment *var, int seg)
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{
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return kvm_x86_ops->set_segment(vcpu, var, seg);
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}
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static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs)
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{
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int mmu_reset_needed = 0;
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int i, pending_vec, max_bits;
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struct descriptor_table dt;
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vcpu_load(vcpu);
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dt.limit = sregs->idt.limit;
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dt.base = sregs->idt.base;
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kvm_x86_ops->set_idt(vcpu, &dt);
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dt.limit = sregs->gdt.limit;
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dt.base = sregs->gdt.base;
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kvm_x86_ops->set_gdt(vcpu, &dt);
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vcpu->cr2 = sregs->cr2;
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mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
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vcpu->cr3 = sregs->cr3;
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set_cr8(vcpu, sregs->cr8);
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mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
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#ifdef CONFIG_X86_64
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kvm_x86_ops->set_efer(vcpu, sregs->efer);
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#endif
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kvm_set_apic_base(vcpu, sregs->apic_base);
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kvm_x86_ops->decache_cr4_guest_bits(vcpu);
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mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
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vcpu->cr0 = sregs->cr0;
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kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
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mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
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kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
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if (!is_long_mode(vcpu) && is_pae(vcpu))
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load_pdptrs(vcpu, vcpu->cr3);
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if (mmu_reset_needed)
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kvm_mmu_reset_context(vcpu);
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if (!irqchip_in_kernel(vcpu->kvm)) {
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memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
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sizeof vcpu->irq_pending);
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vcpu->irq_summary = 0;
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for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
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if (vcpu->irq_pending[i])
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__set_bit(i, &vcpu->irq_summary);
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} else {
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max_bits = (sizeof sregs->interrupt_bitmap) << 3;
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pending_vec = find_first_bit(
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(const unsigned long *)sregs->interrupt_bitmap,
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max_bits);
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/* Only pending external irq is handled here */
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if (pending_vec < max_bits) {
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kvm_x86_ops->set_irq(vcpu, pending_vec);
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pr_debug("Set back pending irq %d\n",
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pending_vec);
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}
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}
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set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
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set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
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set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
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set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
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set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
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set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
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set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
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set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
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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;
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
Loading…
Reference in a new issue