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accel: introduce AccelCPUClass extending CPUClass

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add a new optional interface to CPUClass, which allows accelerators
to extend the CPUClass with additional accelerator-specific
initializations.

This will allow to separate the target cpu code that is specific
to each accelerator, and register it automatically with object
hierarchy lookup depending on accelerator code availability,
as part of the accel_init_interfaces() initialization step.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20210204163931.7358-19-cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Claudio Fontana 2021-02-04 17:39:26 +01:00 • committed by Richard Henderson
parent b86f59c715
commit fb6916dd6c
4 changed files with 87 additions and 0 deletions
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38
include/hw/core/accel-cpu.h Normal file
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/*
* Accelerator interface, specializes CPUClass
* This header is used only by target-specific code.
*
* Copyright 2021 SUSE LLC
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef ACCEL_CPU_H
#define ACCEL_CPU_H
/*
* This header is used to define new accelerator-specific target-specific
* accelerator cpu subclasses.
* It uses CPU_RESOLVING_TYPE, so this is clearly target-specific.
*
* Do not try to use for any other purpose than the implementation of new
* subclasses in target/, or the accel implementation itself in accel/
*/
#define TYPE_ACCEL_CPU "accel-" CPU_RESOLVING_TYPE
#define ACCEL_CPU_NAME(name) (name "-" TYPE_ACCEL_CPU)
typedef struct AccelCPUClass AccelCPUClass;
DECLARE_CLASS_CHECKERS(AccelCPUClass, ACCEL_CPU, TYPE_ACCEL_CPU)
typedef struct AccelCPUClass {
/*< private >*/
ObjectClass parent_class;
/*< public >*/
void (*cpu_class_init)(CPUClass *cc);
void (*cpu_instance_init)(CPUState *cpu);
void (*cpu_realizefn)(CPUState *cpu, Error **errp);
} AccelCPUClass;
#endif /* ACCEL_CPU_H */