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machine: introduce memory-backend property

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Property will contain link to memory backend that will be
used for backing initial RAM.
Follow up commit will alias -mem-path and -mem-prealloc
CLI options into memory backend options to make memory
handling consistent (using only hostmem backend family
for guest RAM allocation).

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200219160953.13771-3-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:08:36 -05:00 • committed by Patchew Importer
parent 68a86dc15c
commit aa8b183974
2 changed files with 26 additions and 0 deletions
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24
hw/core/machine.c
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@ -508,6 +508,22 @@ static void validate_sysbus_device(SysBusDevice *sbdev, void *opaque)
}
}
static char *machine_get_memdev(Object *obj, Error **errp)
{
MachineState *ms = MACHINE(obj);
return g_strdup(ms->ram_memdev_id);
}
static void machine_set_memdev(Object *obj, const char *value, Error **errp)
{
MachineState *ms = MACHINE(obj);
g_free(ms->ram_memdev_id);
ms->ram_memdev_id = g_strdup(value);
}
static void machine_init_notify(Notifier *notifier, void *data)
{
MachineState *machine = MACHINE(qdev_get_machine());
@ -889,6 +905,14 @@ static void machine_initfn(Object *obj)
"Table (HMAT)", NULL);
}
object_property_add_str(obj, "memory-backend",
machine_get_memdev, machine_set_memdev,
&error_abort);
object_property_set_description(obj, "memory-backend",
"Set RAM backend"
"Valid value is ID of hostmem based backend",
&error_abort);
/* Register notifier when init is done for sysbus sanity checks */
ms->sysbus_notifier.notify = machine_init_notify;
qemu_add_machine_init_done_notifier(&ms->sysbus_notifier);