fridtjof/qemu-cr16
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

target/ppc: Introduce macro for deprecating PowerPC CPUs

Browse source 
QEMU has a way to deprecate CPUs by setting the 'deprecation_note' in
CPUClass.

Currently PowerPC CPUs don't use this deprecation process.

Introduce 'POWERPC_DEPRECATED_CPU' macro to deprecate particular PowerPC
CPUs in future.

With the change, QEMU will print a warning like below when the
deprecated CPU/Chips are used (example output if power8nvl is deprecated):

    $ ./build/qemu-system-ppc64 -M powernv8 --cpu power8nvl -nographic
    qemu-system-ppc64: warning: CPU model power8nvl_v1.0-powerpc64-cpu is deprecated -- CPU is unmaintained.
    ...

Also, print '(deprecated)' for deprecated CPUs in 'qemu-system-ppc64
--cpu ?' (example output if power8nvl is deprecated):

    $ ./build/qemu-system-ppc64 --cpu help
      ...
      power8e          (alias for power8e_v2.1)
      power8nvl_v1.0   PVR 004c0100 (deprecated)
      power8nvl        (alias for power8nvl_v1.0)
      power8_v2.0      PVR 004d0200
      ...

Suggested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Aditya Gupta <adityag@linux.ibm.com>
Tested-by: Anushree Mathur <anushree.mathur@linux.ibm.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Link: https://lore.kernel.org/r/20250607110412.2342511-2-adityag@linux.ibm.com
Message-ID: <20250607110412.2342511-2-adityag@linux.ibm.com>
This commit is contained in:
Aditya Gupta 2025-06-07 16:34:11 +05:30 • committed by Harsh Prateek Bora
parent 241f6f7994
commit f19052110e
No known key found for this signature in database
GPG key ID: 4544E994F9D68FBB
2 changed files with 17 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

12
target/ppc/cpu-models.c
View file

@ -32,17 +32,20 @@
/* PowerPC CPU definitions */
#define POWERPC_DEF_PREFIX(pvr, svr, type) \
glue(glue(glue(glue(pvr, _), svr), _), type)
#define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type) \
#define POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, _svr, _type, _deprecation_note) \
static void \
glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_class_init) \
(ObjectClass *oc, const void *data) \
{ \
DeviceClass *dc = DEVICE_CLASS(oc); \
CPUClass *cc = CPU_CLASS(oc); \
PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc); \
\
pcc->pvr = _pvr; \
pcc->svr = _svr; \
dc->desc = _desc; \
\
cc->deprecation_note = _deprecation_note; \
} \
\
static const TypeInfo \
@ -63,6 +66,13 @@
type_init( \
glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_register_types))
#define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type) \
POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, _svr, _type, NULL)
#define POWERPC_DEPRECATED_CPU(_name, _pvr, _type, _desc, _deprecation_note)\
POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, POWERPC_SVR_NONE, _type, \
_deprecation_note)
#define POWERPC_DEF(_name, _pvr, _type, _desc) \
POWERPC_DEF_SVR(_name, _desc, _pvr, POWERPC_SVR_NONE, _type)

7
target/ppc/cpu_init.c
View file

@ -7298,6 +7298,7 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
DeviceClass *family = DEVICE_CLASS(ppc_cpu_get_family_class(pcc));
const char *typename = object_class_get_name(oc);
char *name;
@ -7308,7 +7309,11 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
}
name = cpu_model_from_type(typename);
qemu_printf(" %-16s PVR %08x\n", name, pcc->pvr);
if (cc->deprecation_note) {
qemu_printf(" %-16s PVR %08x (deprecated)\n", name, pcc->pvr);
} else {
qemu_printf(" %-16s PVR %08x\n", name, pcc->pvr);
}
for (i = 0; ppc_cpu_aliases[i].alias != NULL; i++) {
PowerPCCPUAlias *alias = &ppc_cpu_aliases[i];
ObjectClass *alias_oc = ppc_cpu_class_by_name(alias->model);