59d1ce4439
The zpcii-disable machine property can be used to force-disable the use of zPCI interpretation facilities for a VM. By default, this setting will be off for machine 7.2 and newer. Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> Message-Id: <20220902172737.170349-9-mjrosato@linux.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> [thuth: Fix contextual conflict in ccw_machine_7_1_instance_options()] Signed-off-by: Thomas Huth <thuth@redhat.com>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/*
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* s390 zPCI KVM interfaces
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*
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* Copyright 2022 IBM Corp.
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* Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include <linux/kvm.h>
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#include "kvm/kvm_s390x.h"
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#include "hw/s390x/pv.h"
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#include "hw/s390x/s390-pci-bus.h"
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#include "hw/s390x/s390-pci-kvm.h"
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#include "hw/s390x/s390-pci-inst.h"
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#include "cpu_models.h"
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bool s390_pci_kvm_interp_allowed(void)
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{
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return (kvm_s390_get_zpci_op() && !s390_is_pv() &&
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!object_property_get_bool(OBJECT(qdev_get_machine()),
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"zpcii-disable", NULL));
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}
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int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)
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{
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struct kvm_s390_zpci_op args = {
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.fh = pbdev->fh,
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.op = KVM_S390_ZPCIOP_REG_AEN,
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.u.reg_aen.ibv = fib->aibv,
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.u.reg_aen.sb = fib->aisb,
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.u.reg_aen.noi = FIB_DATA_NOI(fib->data),
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.u.reg_aen.isc = FIB_DATA_ISC(fib->data),
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.u.reg_aen.sbo = FIB_DATA_AISBO(fib->data),
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.u.reg_aen.flags = (assist) ? 0 : KVM_S390_ZPCIOP_REGAEN_HOST
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};
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return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
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}
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int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
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{
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struct kvm_s390_zpci_op args = {
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.fh = pbdev->fh,
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.op = KVM_S390_ZPCIOP_DEREG_AEN
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};
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return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
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}
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