307a5f60eb
Some qdev block devices have support for iothreads and take care of the AioContext they are running in, but most devices don't know about any of this. For the latter category, the qdev drive property must make sure that their BlockBackend is in the main AioContext. Unfortunately, while the current code just does the same thing for devices that do support iothreads, this is not correct and it would show as soon as we actually try to keep a consistent AioContext assignment across all nodes and users of a block graph subtree: If a node is already in a non-default AioContext because of one of its users, attaching a new device should still be possible if that device can work in the same AioContext. Switching the node back to the main context first and only then into the device AioContext causes failure (because the existing user wouldn't allow the switch to the main context). So devices that support iothreads need a different kind of drive property that leaves the node in its current AioContext, but by using this type, the device promises to check later that it can work with this context. This patch adds the qdev infrastructure that allows devices to signal that they handle iothreads and qdev should leave the AioContext alone. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
307 lines
15 KiB
C
307 lines
15 KiB
C
#ifndef QEMU_QDEV_PROPERTIES_H
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#define QEMU_QDEV_PROPERTIES_H
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#include "qapi/qapi-types-block.h"
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#include "qapi/qapi-types-misc.h"
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#include "hw/qdev-core.h"
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/*** qdev-properties.c ***/
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extern const PropertyInfo qdev_prop_bit;
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extern const PropertyInfo qdev_prop_bit64;
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extern const PropertyInfo qdev_prop_bool;
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extern const PropertyInfo qdev_prop_uint8;
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extern const PropertyInfo qdev_prop_uint16;
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extern const PropertyInfo qdev_prop_uint32;
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extern const PropertyInfo qdev_prop_int32;
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extern const PropertyInfo qdev_prop_uint64;
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extern const PropertyInfo qdev_prop_int64;
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extern const PropertyInfo qdev_prop_size;
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extern const PropertyInfo qdev_prop_string;
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extern const PropertyInfo qdev_prop_chr;
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extern const PropertyInfo qdev_prop_tpm;
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extern const PropertyInfo qdev_prop_ptr;
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extern const PropertyInfo qdev_prop_macaddr;
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extern const PropertyInfo qdev_prop_on_off_auto;
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extern const PropertyInfo qdev_prop_losttickpolicy;
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extern const PropertyInfo qdev_prop_blockdev_on_error;
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extern const PropertyInfo qdev_prop_bios_chs_trans;
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extern const PropertyInfo qdev_prop_fdc_drive_type;
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extern const PropertyInfo qdev_prop_drive;
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extern const PropertyInfo qdev_prop_drive_iothread;
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extern const PropertyInfo qdev_prop_netdev;
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extern const PropertyInfo qdev_prop_pci_devfn;
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extern const PropertyInfo qdev_prop_blocksize;
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extern const PropertyInfo qdev_prop_pci_host_devaddr;
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extern const PropertyInfo qdev_prop_uuid;
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extern const PropertyInfo qdev_prop_arraylen;
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extern const PropertyInfo qdev_prop_link;
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extern const PropertyInfo qdev_prop_off_auto_pcibar;
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extern const PropertyInfo qdev_prop_pcie_link_speed;
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extern const PropertyInfo qdev_prop_pcie_link_width;
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#define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
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.name = (_name), \
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.info = &(_prop), \
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.offset = offsetof(_state, _field) \
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+ type_check(_type, typeof_field(_state, _field)), \
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}
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#define DEFINE_PROP_SIGNED(_name, _state, _field, _defval, _prop, _type) { \
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.name = (_name), \
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.info = &(_prop), \
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.offset = offsetof(_state, _field) \
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+ type_check(_type,typeof_field(_state, _field)), \
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.set_default = true, \
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.defval.i = (_type)_defval, \
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}
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#define DEFINE_PROP_SIGNED_NODEFAULT(_name, _state, _field, _prop, _type) { \
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.name = (_name), \
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.info = &(_prop), \
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.offset = offsetof(_state, _field) \
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+ type_check(_type, typeof_field(_state, _field)), \
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}
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#define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) { \
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.name = (_name), \
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.info = &(qdev_prop_bit), \
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.bitnr = (_bit), \
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.offset = offsetof(_state, _field) \
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+ type_check(uint32_t,typeof_field(_state, _field)), \
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.set_default = true, \
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.defval.u = (bool)_defval, \
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}
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#define DEFINE_PROP_UNSIGNED(_name, _state, _field, _defval, _prop, _type) { \
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.name = (_name), \
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.info = &(_prop), \
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.offset = offsetof(_state, _field) \
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+ type_check(_type, typeof_field(_state, _field)), \
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.set_default = true, \
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.defval.u = (_type)_defval, \
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}
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#define DEFINE_PROP_UNSIGNED_NODEFAULT(_name, _state, _field, _prop, _type) { \
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.name = (_name), \
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.info = &(_prop), \
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.offset = offsetof(_state, _field) \
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+ type_check(_type, typeof_field(_state, _field)), \
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}
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#define DEFINE_PROP_BIT64(_name, _state, _field, _bit, _defval) { \
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.name = (_name), \
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.info = &(qdev_prop_bit64), \
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.bitnr = (_bit), \
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.offset = offsetof(_state, _field) \
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+ type_check(uint64_t, typeof_field(_state, _field)), \
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.set_default = true, \
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.defval.u = (bool)_defval, \
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}
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#define DEFINE_PROP_BOOL(_name, _state, _field, _defval) { \
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.name = (_name), \
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.info = &(qdev_prop_bool), \
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.offset = offsetof(_state, _field) \
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+ type_check(bool, typeof_field(_state, _field)), \
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.set_default = true, \
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.defval.u = (bool)_defval, \
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}
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#define PROP_ARRAY_LEN_PREFIX "len-"
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/**
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* DEFINE_PROP_ARRAY:
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* @_name: name of the array
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* @_state: name of the device state structure type
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* @_field: uint32_t field in @_state to hold the array length
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* @_arrayfield: field in @_state (of type '@_arraytype *') which
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* will point to the array
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* @_arrayprop: PropertyInfo defining what property the array elements have
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* @_arraytype: C type of the array elements
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*
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* Define device properties for a variable-length array _name. A
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* static property "len-arrayname" is defined. When the device creator
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* sets this property to the desired length of array, further dynamic
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* properties "arrayname[0]", "arrayname[1]", ... are defined so the
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* device creator can set the array element values. Setting the
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* "len-arrayname" property more than once is an error.
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*
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* When the array length is set, the @_field member of the device
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* struct is set to the array length, and @_arrayfield is set to point
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* to (zero-initialised) memory allocated for the array. For a zero
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* length array, @_field will be set to 0 and @_arrayfield to NULL.
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* It is the responsibility of the device deinit code to free the
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* @_arrayfield memory.
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*/
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#define DEFINE_PROP_ARRAY(_name, _state, _field, \
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_arrayfield, _arrayprop, _arraytype) { \
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.name = (PROP_ARRAY_LEN_PREFIX _name), \
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.info = &(qdev_prop_arraylen), \
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.set_default = true, \
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.defval.u = 0, \
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.offset = offsetof(_state, _field) \
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+ type_check(uint32_t, typeof_field(_state, _field)), \
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.arrayinfo = &(_arrayprop), \
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.arrayfieldsize = sizeof(_arraytype), \
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.arrayoffset = offsetof(_state, _arrayfield), \
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}
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#define DEFINE_PROP_LINK(_name, _state, _field, _type, _ptr_type) { \
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.name = (_name), \
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.info = &(qdev_prop_link), \
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.offset = offsetof(_state, _field) \
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+ type_check(_ptr_type, typeof_field(_state, _field)), \
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.link_type = _type, \
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}
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#define DEFINE_PROP_UINT8(_n, _s, _f, _d) \
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DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
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#define DEFINE_PROP_UINT16(_n, _s, _f, _d) \
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DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_uint16, uint16_t)
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#define DEFINE_PROP_UINT32(_n, _s, _f, _d) \
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DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_uint32, uint32_t)
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#define DEFINE_PROP_INT32(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_int32, int32_t)
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#define DEFINE_PROP_UINT64(_n, _s, _f, _d) \
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DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_uint64, uint64_t)
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#define DEFINE_PROP_INT64(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_int64, int64_t)
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#define DEFINE_PROP_SIZE(_n, _s, _f, _d) \
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DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_size, uint64_t)
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#define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_pci_devfn, int32_t)
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/*
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* Please avoid pointer properties. If you must use them, you must
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* cover them in their device's class init function as follows:
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*
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* - If the property must be set, the device cannot be used with
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* device_add, so add code like this:
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* |* Reason: pointer property "NAME-OF-YOUR-PROP" *|
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* DeviceClass *dc = DEVICE_CLASS(class);
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* dc->user_creatable = false;
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*
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* - If the property may safely remain null, document it like this:
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* |*
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* * Note: pointer property "interrupt_vector" may remain null, thus
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* * no need for dc->user_creatable = false;
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* *|
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*/
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#define DEFINE_PROP_PTR(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
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#define DEFINE_PROP_CHR(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharBackend)
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#define DEFINE_PROP_STRING(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
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#define DEFINE_PROP_NETDEV(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, NICPeers)
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#define DEFINE_PROP_DRIVE(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockBackend *)
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#define DEFINE_PROP_DRIVE_IOTHREAD(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_drive_iothread, BlockBackend *)
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#define DEFINE_PROP_MACADDR(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
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#define DEFINE_PROP_ON_OFF_AUTO(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_on_off_auto, OnOffAuto)
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#define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_losttickpolicy, \
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LostTickPolicy)
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#define DEFINE_PROP_BLOCKDEV_ON_ERROR(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_blockdev_on_error, \
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BlockdevOnError)
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#define DEFINE_PROP_BIOS_CHS_TRANS(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_bios_chs_trans, int)
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#define DEFINE_PROP_BLOCKSIZE(_n, _s, _f) \
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DEFINE_PROP_UNSIGNED(_n, _s, _f, 0, qdev_prop_blocksize, uint16_t)
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#define DEFINE_PROP_PCI_HOST_DEVADDR(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_pci_host_devaddr, PCIHostDeviceAddress)
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#define DEFINE_PROP_MEMORY_REGION(_n, _s, _f) \
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DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, MemoryRegion *)
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#define DEFINE_PROP_OFF_AUTO_PCIBAR(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_off_auto_pcibar, \
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OffAutoPCIBAR)
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#define DEFINE_PROP_PCIE_LINK_SPEED(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_pcie_link_speed, \
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PCIExpLinkSpeed)
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#define DEFINE_PROP_PCIE_LINK_WIDTH(_n, _s, _f, _d) \
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DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_pcie_link_width, \
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PCIExpLinkWidth)
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#define DEFINE_PROP_UUID(_name, _state, _field) { \
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.name = (_name), \
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.info = &qdev_prop_uuid, \
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.offset = offsetof(_state, _field) \
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+ type_check(QemuUUID, typeof_field(_state, _field)), \
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.set_default = true, \
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}
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#define DEFINE_PROP_END_OF_LIST() \
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{}
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/* Set properties between creation and init. */
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void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);
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void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value);
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void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value);
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void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value);
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void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value);
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void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value);
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void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value);
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void qdev_prop_set_string(DeviceState *dev, const char *name, const char *value);
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void qdev_prop_set_chr(DeviceState *dev, const char *name, Chardev *value);
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void qdev_prop_set_netdev(DeviceState *dev, const char *name, NetClientState *value);
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void qdev_prop_set_drive(DeviceState *dev, const char *name,
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BlockBackend *value, Error **errp);
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void qdev_prop_set_macaddr(DeviceState *dev, const char *name,
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const uint8_t *value);
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void qdev_prop_set_enum(DeviceState *dev, const char *name, int value);
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/* FIXME: Remove opaque pointer properties. */
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void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
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void qdev_prop_register_global(GlobalProperty *prop);
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int qdev_prop_check_globals(void);
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void qdev_prop_set_globals(DeviceState *dev);
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void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
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Property *prop, const char *value);
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/**
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* qdev_property_add_static:
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* @dev: Device to add the property to.
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* @prop: The qdev property definition.
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* @errp: location to store error information.
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*
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* Add a static QOM property to @dev for qdev property @prop.
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* On error, store error in @errp. Static properties access data in a struct.
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* The type of the QOM property is derived from prop->info.
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*/
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void qdev_property_add_static(DeviceState *dev, Property *prop, Error **errp);
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void qdev_alias_all_properties(DeviceState *target, Object *source);
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/**
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* @qdev_prop_set_after_realize:
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* @dev: device
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* @name: name of property
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* @errp: indirect pointer to Error to be set
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* Set the Error object to report that an attempt was made to set a property
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* on a device after it has already been realized. This is a utility function
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* which allows property-setter functions to easily report the error in
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* a friendly format identifying both the device and the property.
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*/
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void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
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Error **errp);
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/**
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* qdev_prop_allow_set_link_before_realize:
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*
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* Set the #Error object if an attempt is made to set the link after realize.
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* This function should be used as the check() argument to
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* object_property_add_link().
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*/
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void qdev_prop_allow_set_link_before_realize(const Object *obj,
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const char *name,
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Object *val, Error **errp);
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#endif
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