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s390-pci-kvm.c (1390B)

      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 }