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s390x/s390-virtio-ccw: add zpcii-disable machine property

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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>
This commit is contained in:
Matthew Rosato 2022-09-02 13:27:37 -04:00 • committed by Thomas Huth
parent 9ee8f7e46a
commit 59d1ce4439
5 changed files with 39 additions and 2 deletions
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4
hw/s390x/s390-pci-kvm.c
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@ -22,7 +22,9 @@
bool s390_pci_kvm_interp_allowed(void)
{
return kvm_s390_get_zpci_op() && !s390_is_pv();
return (kvm_s390_get_zpci_op() && !s390_is_pv() &&
!object_property_get_bool(OBJECT(qdev_get_machine()),
"zpcii-disable", NULL));
}
int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)