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machine: alias -mem-path and -mem-prealloc into memory-foo backend

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Allow machine to opt in for hostmem backend based initial RAM
even if user uses old -mem-path/prealloc options by providing
  MachineClass::default_ram_id
Follow up patches will incrementally convert machines to new API,
by dropping memory_region_allocate_system_memory() and setting
default_ram_id that board used to use before conversion to keep
migration stream the same.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200219160953.13771-4-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:08:37 -05:00 • committed by Patchew Importer
parent aa8b183974
commit 900c0ba373
5 changed files with 49 additions and 9 deletions
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25
vl.c
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@ -75,6 +75,7 @@ int main(int argc, char **argv)
#include "ui/input.h"
#include "sysemu/sysemu.h"
#include "sysemu/numa.h"
#include "sysemu/hostmem.h"
#include "exec/gdbstub.h"
#include "qemu/timer.h"
#include "chardev/char.h"
@ -2805,6 +2806,26 @@ static void configure_accelerators(const char *progname)
}
}
static void create_default_memdev(MachineState *ms, const char *path,
bool prealloc)
{
Object *obj;
MachineClass *mc = MACHINE_GET_CLASS(ms);
obj = object_new(path ? TYPE_MEMORY_BACKEND_FILE : TYPE_MEMORY_BACKEND_RAM);
if (path) {
object_property_set_str(obj, path, "mem-path", &error_fatal);
}
object_property_set_bool(obj, prealloc, "prealloc", &error_fatal);
object_property_set_int(obj, ms->ram_size, "size", &error_fatal);
object_property_add_child(object_get_objects_root(), mc->default_ram_id,
obj, &error_fatal);
user_creatable_complete(USER_CREATABLE(obj), &error_fatal);
object_unref(obj);
object_property_set_str(OBJECT(ms), mc->default_ram_id, "memory-backend",
&error_fatal);
}
int main(int argc, char **argv, char **envp)
{
int i;
@ -4268,6 +4289,10 @@ int main(int argc, char **argv, char **envp)
}
parse_numa_opts(current_machine);
if (machine_class->default_ram_id && current_machine->ram_size &&
!current_machine->ram_memdev_id) {
create_default_memdev(current_machine, mem_path, mem_prealloc);
}
/* do monitor/qmp handling at preconfig state if requested */
main_loop();