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cpu: Introduce CPU model deprecation API

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Implement the ability of marking some versions deprecated. When
that CPU model is chosen, print a warning.  The warning message
can be customized, e.g. suggesting an alternative CPU model to be
used instead.

The deprecation message will be printed by x86_cpu_list_entry(),
e.g. '-cpu help'.

QMP command 'query-cpu-definitions' will return a bool value
indicating the deprecation status.

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <1600758855-80046-1-git-send-email-robert.hu@linux.intel.com>
[ehabkost: reword commit message]
[ehabkost: Handle NULL cpu_type]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Robert Hoo 2020-09-22 15:14:14 +08:00 • committed by Eduardo Habkost
parent 31c707fb4d
commit 61ad65d0f0
4 changed files with 27 additions and 3 deletions
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12
hw/core/machine.c
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@ -1087,6 +1087,8 @@ MemoryRegion *machine_consume_memdev(MachineState *machine,
void machine_run_board_init(MachineState *machine)
{
MachineClass *machine_class = MACHINE_GET_CLASS(machine);
ObjectClass *oc = object_class_by_name(machine->cpu_type);
CPUClass *cc;
if (machine->ram_memdev_id) {
Object *o;
@ -1106,11 +1108,10 @@ void machine_run_board_init(MachineState *machine)
* specified a CPU with -cpu check here that the user CPU is supported.
*/
if (machine_class->valid_cpu_types && machine->cpu_type) {
ObjectClass *class = object_class_by_name(machine->cpu_type);
int i;
for (i = 0; machine_class->valid_cpu_types[i]; i++) {
if (object_class_dynamic_cast(class,
if (object_class_dynamic_cast(oc,
machine_class->valid_cpu_types[i])) {
/* The user specificed CPU is in the valid field, we are
* good to go.
@ -1133,6 +1134,13 @@ void machine_run_board_init(MachineState *machine)
}
}
/* Check if CPU type is deprecated and warn if so */
cc = CPU_CLASS(oc);
if (cc && cc->deprecation_note) {
warn_report("CPU model %s is deprecated -- %s", machine->cpu_type,
cc->deprecation_note);
}
machine_class->init(machine);
}