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28221f9c99
As the kernel has no way of disallowing the start of a huge page backed VM, we can migrate a running huge backed VM to a host that has no huge page KVM support. Let's glue huge page support support to the 3.1 machine, so we do not migrate to a destination host that doesn't have QEMU huge page support and can stop migration if KVM doesn't indicate support. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Message-Id: <20180928093435.198573-1-frankja@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* virtio ccw machine definitions
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*
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* Copyright 2012, 2016 IBM Corp.
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* Author(s): Cornelia Huck <cornelia.huck@de.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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#ifndef HW_S390X_S390_VIRTIO_CCW_H
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#define HW_S390X_S390_VIRTIO_CCW_H
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#include "hw/boards.h"
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#define TYPE_S390_CCW_MACHINE "s390-ccw-machine"
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#define S390_CCW_MACHINE(obj) \
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OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE)
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#define S390_MACHINE_CLASS(klass) \
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OBJECT_CLASS_CHECK(S390CcwMachineClass, (klass), TYPE_S390_CCW_MACHINE)
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typedef struct S390CcwMachineState {
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/*< private >*/
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MachineState parent_obj;
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/*< public >*/
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bool aes_key_wrap;
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bool dea_key_wrap;
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uint8_t loadparm[8];
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} S390CcwMachineState;
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typedef struct S390CcwMachineClass {
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/*< private >*/
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MachineClass parent_class;
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/*< public >*/
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bool ri_allowed;
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bool cpu_model_allowed;
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bool css_migration_enabled;
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bool hpage_1m_allowed;
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} S390CcwMachineClass;
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/* runtime-instrumentation allowed by the machine */
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bool ri_allowed(void);
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/* cpu model allowed by the machine */
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bool cpu_model_allowed(void);
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/* 1M huge page mappings allowed by the machine */
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bool hpage_1m_allowed(void);
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/**
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* Returns true if (vmstate based) migration of the channel subsystem
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* is enabled, false if it is disabled.
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*/
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bool css_migration_enabled(void);
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#endif
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