#ifdef CONFIG_KVM_S390_UCONTROL
case KVM_CAP_S390_UCONTROL:
#endif
+ case KVM_CAP_ASYNC_PF:
case KVM_CAP_SYNC_REGS:
case KVM_CAP_ONE_REG:
case KVM_CAP_ENABLE_CAP:
case KVM_CAP_S390_CSS_SUPPORT:
case KVM_CAP_IOEVENTFD:
+ case KVM_CAP_DEVICE_CTRL:
+ case KVM_CAP_ENABLE_CAP_VM:
r = 1;
break;
case KVM_CAP_NR_VCPUS:
return 0;
}
+static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
+{
+ int r;
+
+ if (cap->flags)
+ return -EINVAL;
+
+ switch (cap->cap) {
+ case KVM_CAP_S390_IRQCHIP:
+ kvm->arch.use_irqchip = 1;
+ r = 0;
+ break;
+ default:
+ r = -EINVAL;
+ break;
+ }
+ return r;
+}
+
long kvm_arch_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
r = kvm_s390_inject_vm(kvm, &s390int);
break;
}
+ case KVM_ENABLE_CAP: {
+ struct kvm_enable_cap cap;
+ r = -EFAULT;
+ if (copy_from_user(&cap, argp, sizeof(cap)))
+ break;
+ r = kvm_vm_ioctl_enable_cap(kvm, &cap);
+ break;
+ }
+ case KVM_CREATE_IRQCHIP: {
+ struct kvm_irq_routing_entry routing;
+
+ r = -EINVAL;
+ if (kvm->arch.use_irqchip) {
+ /* Set up dummy routing. */
+ memset(&routing, 0, sizeof(routing));
+ kvm_set_irq_routing(kvm, &routing, 0, 0);
+ r = 0;
+ }
+ break;
+ }
default:
r = -ENOTTY;
}
{
int rc;
char debug_name[16];
+ static unsigned long sca_offset;
rc = -EINVAL;
#ifdef CONFIG_KVM_S390_UCONTROL
kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL);
if (!kvm->arch.sca)
goto out_err;
+ spin_lock(&kvm_lock);
+ sca_offset = (sca_offset + 16) & 0x7f0;
+ kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset);
+ spin_unlock(&kvm_lock);
sprintf(debug_name, "kvm-%u", current->pid);
if (!kvm->arch.gmap)
goto out_nogmap;
kvm->arch.gmap->private = kvm;
+ kvm->arch.gmap->pfault_enabled = 0;
}
kvm->arch.css_support = 0;
+ kvm->arch.use_irqchip = 0;
return 0;
out_nogmap:
{
VCPU_EVENT(vcpu, 3, "%s", "free cpu");
trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
+ kvm_clear_async_pf_completion_queue(vcpu);
if (!kvm_is_ucontrol(vcpu->kvm)) {
clear_bit(63 - vcpu->vcpu_id,
(unsigned long *) &vcpu->kvm->arch.sca->mcn);
debug_unregister(kvm->arch.dbf);
if (!kvm_is_ucontrol(kvm))
gmap_free(kvm->arch.gmap);
+ kvm_s390_destroy_adapters(kvm);
}
/* Section: vcpu related */
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
+ vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
+ kvm_clear_async_pf_completion_queue(vcpu);
if (kvm_is_ucontrol(vcpu->kvm)) {
vcpu->arch.gmap = gmap_alloc(current->mm);
if (!vcpu->arch.gmap)
vcpu->arch.guest_fpregs.fpc = 0;
asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc));
vcpu->arch.sie_block->gbea = 1;
+ vcpu->arch.sie_block->pp = 0;
+ vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
+ kvm_clear_async_pf_completion_queue(vcpu);
atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_local_irqs(vcpu);
}
int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
spin_lock_init(&vcpu->arch.local_int.lock);
INIT_LIST_HEAD(&vcpu->arch.local_int.list);
vcpu->arch.local_int.float_int = &kvm->arch.float_int;
- spin_lock(&kvm->arch.float_int.lock);
- kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int;
vcpu->arch.local_int.wq = &vcpu->wq;
vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
- spin_unlock(&kvm->arch.float_int.lock);
rc = kvm_vcpu_init(vcpu, kvm, id);
if (rc)
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
- /* kvm common code refers to this, but never calls it */
- BUG();
- return 0;
+ return kvm_cpu_has_interrupt(vcpu);
}
void s390_vcpu_block(struct kvm_vcpu *vcpu)
r = put_user(vcpu->arch.sie_block->ckc,
(u64 __user *)reg->addr);
break;
+ case KVM_REG_S390_PFTOKEN:
+ r = put_user(vcpu->arch.pfault_token,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFCOMPARE:
+ r = put_user(vcpu->arch.pfault_compare,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFSELECT:
+ r = put_user(vcpu->arch.pfault_select,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PP:
+ r = put_user(vcpu->arch.sie_block->pp,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_GBEA:
+ r = put_user(vcpu->arch.sie_block->gbea,
+ (u64 __user *)reg->addr);
+ break;
default:
break;
}
r = get_user(vcpu->arch.sie_block->ckc,
(u64 __user *)reg->addr);
break;
+ case KVM_REG_S390_PFTOKEN:
+ r = get_user(vcpu->arch.pfault_token,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFCOMPARE:
+ r = get_user(vcpu->arch.pfault_compare,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFSELECT:
+ r = get_user(vcpu->arch.pfault_select,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PP:
+ r = get_user(vcpu->arch.sie_block->pp,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_GBEA:
+ r = get_user(vcpu->arch.sie_block->gbea,
+ (u64 __user *)reg->addr);
+ break;
default:
break;
}
return 0;
}
+static long kvm_arch_fault_in_sync(struct kvm_vcpu *vcpu)
+{
+ long rc;
+ hva_t fault = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap);
+ struct mm_struct *mm = current->mm;
+ down_read(&mm->mmap_sem);
+ rc = get_user_pages(current, mm, fault, 1, 1, 0, NULL, NULL);
+ up_read(&mm->mmap_sem);
+ return rc;
+}
+
+static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
+ unsigned long token)
+{
+ struct kvm_s390_interrupt inti;
+ inti.parm64 = token;
+
+ if (start_token) {
+ inti.type = KVM_S390_INT_PFAULT_INIT;
+ WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti));
+ } else {
+ inti.type = KVM_S390_INT_PFAULT_DONE;
+ WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
+ }
+}
+
+void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
+ struct kvm_async_pf *work)
+{
+ trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
+ __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
+}
+
+void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
+ struct kvm_async_pf *work)
+{
+ trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
+ __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
+}
+
+void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
+ struct kvm_async_pf *work)
+{
+ /* s390 will always inject the page directly */
+}
+
+bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
+{
+ /*
+ * s390 will always inject the page directly,
+ * but we still want check_async_completion to cleanup
+ */
+ return true;
+}
+
+static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
+{
+ hva_t hva;
+ struct kvm_arch_async_pf arch;
+ int rc;
+
+ if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
+ return 0;
+ if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
+ vcpu->arch.pfault_compare)
+ return 0;
+ if (psw_extint_disabled(vcpu))
+ return 0;
+ if (kvm_cpu_has_interrupt(vcpu))
+ return 0;
+ if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
+ return 0;
+ if (!vcpu->arch.gmap->pfault_enabled)
+ return 0;
+
+ hva = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap);
+ if (copy_from_guest(vcpu, &arch.pfault_token, vcpu->arch.pfault_token, 8))
+ return 0;
+
+ rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
+ return rc;
+}
+
static int vcpu_pre_run(struct kvm_vcpu *vcpu)
{
int rc, cpuflags;
+ /*
+ * On s390 notifications for arriving pages will be delivered directly
+ * to the guest but the house keeping for completed pfaults is
+ * handled outside the worker.
+ */
+ kvm_check_async_pf_completion(vcpu);
+
memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16);
if (need_resched())
static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
{
- int rc;
+ int rc = -1;
VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
vcpu->arch.sie_block->icptcode);
current->thread.gmap_addr;
vcpu->run->s390_ucontrol.pgm_code = 0x10;
rc = -EREMOTE;
- } else {
+
+ } else if (current->thread.gmap_pfault) {
+ trace_kvm_s390_major_guest_pfault(vcpu);
+ current->thread.gmap_pfault = 0;
+ if (kvm_arch_setup_async_pf(vcpu) ||
+ (kvm_arch_fault_in_sync(vcpu) >= 0))
+ rc = 0;
+ }
+
+ if (rc == -1) {
VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
trace_kvm_s390_sie_fault(vcpu);
rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
if (rc == 0) {
if (kvm_is_ucontrol(vcpu->kvm))
- rc = -EOPNOTSUPP;
+ /* Don't exit for host interrupts. */
+ rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0;
else
rc = kvm_handle_sie_intercept(vcpu);
}
atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
- BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL);
-
switch (kvm_run->exit_reason) {
case KVM_EXIT_S390_SIEIC:
case KVM_EXIT_UNKNOWN:
projects / linux.git / blobdiff