hw/s390x/s390-pci-kvm.c

   1 /*
   2  * s390 zPCI KVM interfaces
   3  *
   4  * Copyright 2022 IBM Corp.
   5  * Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13
  14 #include <linux/kvm.h>
  15
  16 #include "kvm/kvm_s390x.h"
  17 #include "hw/s390x/pv.h"
  18 #include "hw/s390x/s390-pci-bus.h"
  19 #include "hw/s390x/s390-pci-kvm.h"
  20 #include "hw/s390x/s390-pci-inst.h"
  21 #include "cpu_models.h"
  22
  23 bool s390_pci_kvm_interp_allowed(void)
  24 {
  25     return kvm_s390_get_zpci_op() && !s390_is_pv();
  26 }
  27
  28 int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)
  29 {
  30     struct kvm_s390_zpci_op args = {
  31         .fh = pbdev->fh,
  32         .op = KVM_S390_ZPCIOP_REG_AEN,
  33         .u.reg_aen.ibv = fib->aibv,
  34         .u.reg_aen.sb = fib->aisb,
  35         .u.reg_aen.noi = FIB_DATA_NOI(fib->data),
  36         .u.reg_aen.isc = FIB_DATA_ISC(fib->data),
  37         .u.reg_aen.sbo = FIB_DATA_AISBO(fib->data),
  38         .u.reg_aen.flags = (assist) ? 0 : KVM_S390_ZPCIOP_REGAEN_HOST
  39     };
  40
  41     return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
  42 }
  43
  44 int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
  45 {
  46     struct kvm_s390_zpci_op args = {
  47         .fh = pbdev->fh,
  48         .op = KVM_S390_ZPCIOP_DEREG_AEN
  49     };
  50
  51     return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
  52 }