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121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* s390 storage key device
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*
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* Copyright 2015 IBM Corp.
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* Author(s): Jason J. Herne <jjherne@linux.vnet.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 S390_STORAGE_KEYS_H
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#define S390_STORAGE_KEYS_H
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#include "hw/qdev-core.h"
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#include "monitor/monitor.h"
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#include "qom/object.h"
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#define TYPE_S390_SKEYS "s390-skeys"
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OBJECT_DECLARE_TYPE(S390SKeysState, S390SKeysClass, S390_SKEYS)
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struct S390SKeysState {
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DeviceState parent_obj;
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bool migration_enabled;
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};
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struct S390SKeysClass {
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DeviceClass parent_class;
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/**
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* @skeys_are_enabled:
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*
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* Check whether storage keys are enabled. If not enabled, they were not
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* enabled lazily either by the guest via a storage key instruction or
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* by the host during migration.
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*
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* If disabled, everything not explicitly triggered by the guest,
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* such as outgoing migration or dirty/change tracking, should not touch
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* storage keys and should not lazily enable it.
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*
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* @ks: the #S390SKeysState
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*
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* Returns false if not enabled and true if enabled.
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*/
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bool (*skeys_are_enabled)(S390SKeysState *ks);
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/**
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* @enable_skeys:
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*
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* Lazily enable storage keys. If this function is not implemented,
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* setting a storage key will lazily enable storage keys implicitly
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* instead. TCG guests have to make sure to flush the TLB of all CPUs
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* if storage keys were not enabled before this call.
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*
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* @ks: the #S390SKeysState
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*
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* Returns false if not enabled before this call, and true if already
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* enabled.
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*/
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bool (*enable_skeys)(S390SKeysState *ks);
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/**
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* @get_skeys:
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*
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* Get storage keys for the given PFN range. This call will fail if
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* storage keys have not been lazily enabled yet.
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*
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* Callers have to validate that a GFN is valid before this call.
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*
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* @ks: the #S390SKeysState
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* @start_gfn: the start GFN to get storage keys for
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* @count: the number of storage keys to get
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* @keys: the byte array where storage keys will be stored to
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*
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* Returns 0 on success, returns an error if getting a storage key failed.
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*/
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int (*get_skeys)(S390SKeysState *ks, uint64_t start_gfn, uint64_t count,
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uint8_t *keys);
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/**
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* @set_skeys:
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*
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* Set storage keys for the given PFN range. This call will fail if
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* storage keys have not been lazily enabled yet and implicit
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* enablement is not supported.
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*
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* Callers have to validate that a GFN is valid before this call.
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*
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* @ks: the #S390SKeysState
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* @start_gfn: the start GFN to set storage keys for
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* @count: the number of storage keys to set
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* @keys: the byte array where storage keys will be read from
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*
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* Returns 0 on success, returns an error if setting a storage key failed.
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*/
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int (*set_skeys)(S390SKeysState *ks, uint64_t start_gfn, uint64_t count,
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uint8_t *keys);
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};
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#define TYPE_KVM_S390_SKEYS "s390-skeys-kvm"
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#define TYPE_QEMU_S390_SKEYS "s390-skeys-qemu"
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typedef struct QEMUS390SKeysState QEMUS390SKeysState;
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DECLARE_INSTANCE_CHECKER(QEMUS390SKeysState, QEMU_S390_SKEYS,
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TYPE_QEMU_S390_SKEYS)
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struct QEMUS390SKeysState {
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S390SKeysState parent_obj;
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uint8_t *keydata;
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uint32_t key_count;
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};
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void s390_skeys_init(void);
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S390SKeysState *s390_get_skeys_device(void);
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void hmp_dump_skeys(Monitor *mon, const QDict *qdict);
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void hmp_info_skeys(Monitor *mon, const QDict *qdict);
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#endif /* S390_STORAGE_KEYS_H */
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