[PATCH-for-8.2? 0/6] hw/arm/stm32xxx: Report error when incorrect CPU is used

[PATCH-for-8.2? 0/6] hw/arm/stm32xxx: Report error when incorrect CPU is used

[Philippe Mathieu-Daudé]

Hi,

While reviewing this [1] series from Arnaud and Inès,
I realized STM32 based boards don't check the requested
CPU type is correct, and ignore it. Possibly confusing
users.
Since these simple boards code is used as template,
I took the opportunity to sanitize it a bit, using the
MachineClass::valid_cpu_types which seems simpler (to me)
for newcomers.

First 3 patches are candidate for 8.2 but this is a long
standing issue, not a regression from 8.1.

Other patches are similar cleanups, for 9.0. Besides, the
CPU list output will be nicer with Gavin Shan work [2]
integrated.

Regards,

Phil.

[1] https://lore.kernel.org/qemu-devel/170003673257.14701.8139061802716120109-0@git.sr.ht/
[2] https://lore.kernel.org/qemu-devel/20231114235628.534334-1-gshan@redhat.com/

Philippe Mathieu-Daudé (6):
  hw/arm/stm32f405: Report error when incorrect CPU is used
  hw/arm/stm32f205: Report error when incorrect CPU is used
  hw/arm/stm32f100: Report error when incorrect CPU is used
  hw/arm/msf2: Simplify setting MachineClass::valid_cpu_types[]
  hw/arm/npcm7xx_boards: Simplify setting
    MachineClass::valid_cpu_types[]
  hw/arm/musca: Simplify setting MachineClass::valid_cpu_types[]

 include/hw/arm/msf2-soc.h      |  3 ---
 include/hw/arm/stm32f100_soc.h |  4 ----
 include/hw/arm/stm32f205_soc.h |  4 ----
 include/hw/arm/stm32f405_soc.h |  4 ----
 hw/arm/msf2-soc.c              |  3 +--
 hw/arm/msf2-som.c              | 16 ++++++----------
 hw/arm/musca.c                 | 13 +++++--------
 hw/arm/netduino2.c             |  7 ++++++-
 hw/arm/netduinoplus2.c         |  7 ++++++-
 hw/arm/npcm7xx_boards.c        | 13 +++++--------
 hw/arm/olimex-stm32-h405.c     |  8 ++++++--
 hw/arm/stm32f100_soc.c         |  9 ++-------
 hw/arm/stm32f205_soc.c         |  9 ++-------
 hw/arm/stm32f405_soc.c         |  8 +-------
 hw/arm/stm32vldiscovery.c      |  7 ++++++-
 15 files changed, 46 insertions(+), 69 deletions(-)

-- 
2.41.0

[PATCH-for-8.2? 1/6] hw/arm/stm32f405: Report error when incorrect CPU is used

[Philippe Mathieu-Daudé]

Both 'netduinoplus2' and 'olimex-stm32-h405' machines ignore the
CPU type requested by the command line. This might confuse users,
since the following will create a machine with a Cortex-M4 CPU:

  $ qemu-system-aarch64 -M netduinoplus2 -cpu cortex-r5f

Set the MachineClass::valid_cpu_types field (introduced in commit
c9cf636d48 "machine: Add a valid_cpu_types property").
Remove the now unused MachineClass::default_cpu_type field.

We now get:

  $ qemu-system-aarch64 -M netduinoplus2 -cpu cortex-r5f
  qemu-system-aarch64: Invalid CPU type: cortex-r5f-arm-cpu
  The valid types are: cortex-m4-arm-cpu

Since the SoC family can only use Cortex-M4 CPUs, hard-code the
CPU type name at the SoC level, removing the QOM property
entirely.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/arm/stm32f405_soc.h | 4 ----
 hw/arm/netduinoplus2.c         | 7 ++++++-
 hw/arm/olimex-stm32-h405.c     | 8 ++++++--
 hw/arm/stm32f405_soc.c         | 8 +-------
 4 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/include/hw/arm/stm32f405_soc.h b/include/hw/arm/stm32f405_soc.h
index c968ce3ab2..d15c03c4b5 100644
--- a/include/hw/arm/stm32f405_soc.h
+++ b/include/hw/arm/stm32f405_soc.h
@@ -51,11 +51,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(STM32F405State, STM32F405_SOC)
 #define CCM_SIZE (64 * 1024)
 
 struct STM32F405State {
-    /*< private >*/
     SysBusDevice parent_obj;
-    /*< public >*/
-
-    char *cpu_type;
 
     ARMv7MState armv7m;
 
diff --git a/hw/arm/netduinoplus2.c b/hw/arm/netduinoplus2.c
index 515c081605..e411806dd7 100644
--- a/hw/arm/netduinoplus2.c
+++ b/hw/arm/netduinoplus2.c
@@ -44,7 +44,6 @@ static void netduinoplus2_init(MachineState *machine)
     clock_set_hz(sysclk, SYSCLK_FRQ);
 
     dev = qdev_new(TYPE_STM32F405_SOC);
-    qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
     qdev_connect_clock_in(dev, "sysclk", sysclk);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
@@ -55,7 +54,13 @@ static void netduinoplus2_init(MachineState *machine)
 
 static void netduinoplus2_machine_init(MachineClass *mc)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m4"),
+        NULL
+    };
+
     mc->desc = "Netduino Plus 2 Machine (Cortex-M4)";
+    mc->valid_cpu_types = machine_valid_cpu_types;
     mc->init = netduinoplus2_init;
 }
 
diff --git a/hw/arm/olimex-stm32-h405.c b/hw/arm/olimex-stm32-h405.c
index 3aa61c91b7..694b1dd6ed 100644
--- a/hw/arm/olimex-stm32-h405.c
+++ b/hw/arm/olimex-stm32-h405.c
@@ -47,7 +47,6 @@ static void olimex_stm32_h405_init(MachineState *machine)
     clock_set_hz(sysclk, SYSCLK_FRQ);
 
     dev = qdev_new(TYPE_STM32F405_SOC);
-    qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
     qdev_connect_clock_in(dev, "sysclk", sysclk);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
@@ -58,9 +57,14 @@ static void olimex_stm32_h405_init(MachineState *machine)
 
 static void olimex_stm32_h405_machine_init(MachineClass *mc)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m4"),
+        NULL
+    };
+
     mc->desc = "Olimex STM32-H405 (Cortex-M4)";
     mc->init = olimex_stm32_h405_init;
-    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m4");
+    mc->valid_cpu_types = machine_valid_cpu_types;
 
     /* SRAM pre-allocated as part of the SoC instantiation */
     mc->default_ram_size = 0;
diff --git a/hw/arm/stm32f405_soc.c b/hw/arm/stm32f405_soc.c
index cef23d7ee4..a65bbe298d 100644
--- a/hw/arm/stm32f405_soc.c
+++ b/hw/arm/stm32f405_soc.c
@@ -149,7 +149,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
 
     armv7m = DEVICE(&s->armv7m);
     qdev_prop_set_uint32(armv7m, "num-irq", 96);
-    qdev_prop_set_string(armv7m, "cpu-type", s->cpu_type);
+    qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk);
     qdev_connect_clock_in(armv7m, "refclk", s->refclk);
@@ -287,17 +287,11 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("RNG",         0x50060800, 0x400);
 }
 
-static Property stm32f405_soc_properties[] = {
-    DEFINE_PROP_STRING("cpu-type", STM32F405State, cpu_type),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
 static void stm32f405_soc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = stm32f405_soc_realize;
-    device_class_set_props(dc, stm32f405_soc_properties);
     /* No vmstate or reset required: device has no internal state */
 }
 
-- 
2.41.0

[PATCH-for-8.2? 2/6] hw/arm/stm32f205: Report error when incorrect CPU is used

[Philippe Mathieu-Daudé]

The 'netduino2' machine ignores the CPU type requested by the
command line. This might confuse users, since the following will
create a machine with a Cortex-M3 CPU:

  $ qemu-system-arm -M netduino2 -cpu cortex-a9

Set the MachineClass::valid_cpu_types field (introduced in commit
c9cf636d48 "machine: Add a valid_cpu_types property").
Remove the now unused MachineClass::default_cpu_type field.

We now get:

  $ qemu-system-arm -M netduino2 -cpu cortex-a9
  qemu-system-arm: Invalid CPU type: cortex-a9-arm-cpu
  The valid types are: cortex-m3-arm-cpu

Since the SoC family can only use Cortex-M3 CPUs, hard-code the
CPU type name at the SoC level, removing the QOM property
entirely.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/arm/stm32f205_soc.h | 4 ----
 hw/arm/netduino2.c             | 7 ++++++-
 hw/arm/stm32f205_soc.c         | 9 ++-------
 3 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/include/hw/arm/stm32f205_soc.h b/include/hw/arm/stm32f205_soc.h
index 5a4f776264..4f4c8bbebc 100644
--- a/include/hw/arm/stm32f205_soc.h
+++ b/include/hw/arm/stm32f205_soc.h
@@ -49,11 +49,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(STM32F205State, STM32F205_SOC)
 #define SRAM_SIZE (128 * 1024)
 
 struct STM32F205State {
-    /*< private >*/
     SysBusDevice parent_obj;
-    /*< public >*/
-
-    char *cpu_type;
 
     ARMv7MState armv7m;
 
diff --git a/hw/arm/netduino2.c b/hw/arm/netduino2.c
index 83753d53a3..94b6b379d6 100644
--- a/hw/arm/netduino2.c
+++ b/hw/arm/netduino2.c
@@ -44,7 +44,6 @@ static void netduino2_init(MachineState *machine)
     clock_set_hz(sysclk, SYSCLK_FRQ);
 
     dev = qdev_new(TYPE_STM32F205_SOC);
-    qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
     qdev_connect_clock_in(dev, "sysclk", sysclk);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
@@ -54,8 +53,14 @@ static void netduino2_init(MachineState *machine)
 
 static void netduino2_machine_init(MachineClass *mc)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m3"),
+        NULL
+    };
+
     mc->desc = "Netduino 2 Machine (Cortex-M3)";
     mc->init = netduino2_init;
+    mc->valid_cpu_types = machine_valid_cpu_types;
     mc->ignore_memory_transaction_failures = true;
 }
 
diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
index c6b75a381d..1a548646f6 100644
--- a/hw/arm/stm32f205_soc.c
+++ b/hw/arm/stm32f205_soc.c
@@ -127,7 +127,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
 
     armv7m = DEVICE(&s->armv7m);
     qdev_prop_set_uint32(armv7m, "num-irq", 96);
-    qdev_prop_set_string(armv7m, "cpu-type", s->cpu_type);
+    qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk);
     qdev_connect_clock_in(armv7m, "refclk", s->refclk);
@@ -201,17 +201,12 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
     }
 }
 
-static Property stm32f205_soc_properties[] = {
-    DEFINE_PROP_STRING("cpu-type", STM32F205State, cpu_type),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
 static void stm32f205_soc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = stm32f205_soc_realize;
-    device_class_set_props(dc, stm32f205_soc_properties);
+    /* No vmstate or reset required: device has no internal state */
 }
 
 static const TypeInfo stm32f205_soc_info = {
-- 
2.41.0

[PATCH-for-8.2? 3/6] hw/arm/stm32f100: Report error when incorrect CPU is used

[Philippe Mathieu-Daudé]

The 'stm32vldiscovery' machine ignores the CPU type requested by
the command line. This might confuse users, since the following
will create a machine with a Cortex-M3 CPU:

  $ qemu-system-aarch64 -M stm32vldiscovery -cpu neoverse-n1

Set the MachineClass::valid_cpu_types field (introduced in commit
c9cf636d48 "machine: Add a valid_cpu_types property").
Remove the now unused MachineClass::default_cpu_type field.

We now get:

  $ qemu-system-aarch64 -M stm32vldiscovery -cpu neoverse-n1
  qemu-system-aarch64: Invalid CPU type: neoverse-n1-arm-cpu
  The valid types are: cortex-m3-arm-cpu

Since the SoC family can only use Cortex-M3 CPUs, hard-code the
CPU type name at the SoC level, removing the QOM property
entirely.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/arm/stm32f100_soc.h | 4 ----
 hw/arm/stm32f100_soc.c         | 9 ++-------
 hw/arm/stm32vldiscovery.c      | 7 ++++++-
 3 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/include/hw/arm/stm32f100_soc.h b/include/hw/arm/stm32f100_soc.h
index 40cd415b28..a74d7b369c 100644
--- a/include/hw/arm/stm32f100_soc.h
+++ b/include/hw/arm/stm32f100_soc.h
@@ -43,12 +43,8 @@ OBJECT_DECLARE_SIMPLE_TYPE(STM32F100State, STM32F100_SOC)
 #define SRAM_SIZE (8 * 1024)
 
 struct STM32F100State {
-    /*< private >*/
     SysBusDevice parent_obj;
 
-    /*< public >*/
-    char *cpu_type;
-
     ARMv7MState armv7m;
 
     STM32F2XXUsartState usart[STM_NUM_USARTS];
diff --git a/hw/arm/stm32f100_soc.c b/hw/arm/stm32f100_soc.c
index f7b344ba9f..b90d440d7a 100644
--- a/hw/arm/stm32f100_soc.c
+++ b/hw/arm/stm32f100_soc.c
@@ -115,7 +115,7 @@ static void stm32f100_soc_realize(DeviceState *dev_soc, Error **errp)
     /* Init ARMv7m */
     armv7m = DEVICE(&s->armv7m);
     qdev_prop_set_uint32(armv7m, "num-irq", 61);
-    qdev_prop_set_string(armv7m, "cpu-type", s->cpu_type);
+    qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk);
     qdev_connect_clock_in(armv7m, "refclk", s->refclk);
@@ -180,17 +180,12 @@ static void stm32f100_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("CRC",       0x40023000, 0x400);
 }
 
-static Property stm32f100_soc_properties[] = {
-    DEFINE_PROP_STRING("cpu-type", STM32F100State, cpu_type),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
 static void stm32f100_soc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = stm32f100_soc_realize;
-    device_class_set_props(dc, stm32f100_soc_properties);
+    /* No vmstate or reset required: device has no internal state */
 }
 
 static const TypeInfo stm32f100_soc_info = {
diff --git a/hw/arm/stm32vldiscovery.c b/hw/arm/stm32vldiscovery.c
index 67675e952f..6300dca722 100644
--- a/hw/arm/stm32vldiscovery.c
+++ b/hw/arm/stm32vldiscovery.c
@@ -47,7 +47,6 @@ static void stm32vldiscovery_init(MachineState *machine)
     clock_set_hz(sysclk, SYSCLK_FRQ);
 
     dev = qdev_new(TYPE_STM32F100_SOC);
-    qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
     qdev_connect_clock_in(dev, "sysclk", sysclk);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
@@ -58,8 +57,14 @@ static void stm32vldiscovery_init(MachineState *machine)
 
 static void stm32vldiscovery_machine_init(MachineClass *mc)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m3"),
+        NULL
+    };
+
     mc->desc = "ST STM32VLDISCOVERY (Cortex-M3)";
     mc->init = stm32vldiscovery_init;
+    mc->valid_cpu_types = machine_valid_cpu_types;
 }
 
 DEFINE_MACHINE("stm32vldiscovery", stm32vldiscovery_machine_init)
-- 
2.41.0

[PATCH-for-9.0 4/6] hw/arm/msf2: Simplify setting MachineClass::valid_cpu_types[]

[Philippe Mathieu-Daudé]

The M2Sxxx SoC family can only be used with Cortex-M3.
Propagating the CPU type from the board level is pointless.

Hard-code the CPU type at the SoC level.
Remove the now ignored MachineClass::default_cpu_type field.

Use the common code introduced in commit c9cf636d48 ("machine: Add
a valid_cpu_types property") to check for valid CPU type at the
board level.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/arm/msf2-soc.h |  3 ---
 hw/arm/msf2-soc.c         |  3 +--
 hw/arm/msf2-som.c         | 16 ++++++----------
 3 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/include/hw/arm/msf2-soc.h b/include/hw/arm/msf2-soc.h
index ce417a6266..9300664e8e 100644
--- a/include/hw/arm/msf2-soc.h
+++ b/include/hw/arm/msf2-soc.h
@@ -47,13 +47,10 @@ OBJECT_DECLARE_SIMPLE_TYPE(MSF2State, MSF2_SOC)
 #define MSF2_NUM_TIMERS       2
 
 struct MSF2State {
-    /*< private >*/
     SysBusDevice parent_obj;
-    /*< public >*/
 
     ARMv7MState armv7m;
 
-    char *cpu_type;
     char *part_name;
     uint64_t envm_size;
     uint64_t esram_size;
diff --git a/hw/arm/msf2-soc.c b/hw/arm/msf2-soc.c
index b5fe9f364d..d6eb9ec9ac 100644
--- a/hw/arm/msf2-soc.c
+++ b/hw/arm/msf2-soc.c
@@ -134,7 +134,7 @@ static void m2sxxx_soc_realize(DeviceState *dev_soc, Error **errp)
 
     armv7m = DEVICE(&s->armv7m);
     qdev_prop_set_uint32(armv7m, "num-irq", 81);
-    qdev_prop_set_string(armv7m, "cpu-type", s->cpu_type);
+    qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     qdev_connect_clock_in(armv7m, "cpuclk", s->m3clk);
     qdev_connect_clock_in(armv7m, "refclk", s->refclk);
@@ -231,7 +231,6 @@ static Property m2sxxx_soc_properties[] = {
      * part name specifies the type of SmartFusion2 device variant(this
      * property is for information purpose only.
      */
-    DEFINE_PROP_STRING("cpu-type", MSF2State, cpu_type),
     DEFINE_PROP_STRING("part-name", MSF2State, part_name),
     DEFINE_PROP_UINT64("eNVM-size", MSF2State, envm_size, MSF2_ENVM_MAX_SIZE),
     DEFINE_PROP_UINT64("eSRAM-size", MSF2State, esram_size,
diff --git a/hw/arm/msf2-som.c b/hw/arm/msf2-som.c
index 7b3106c790..ed399223b8 100644
--- a/hw/arm/msf2-som.c
+++ b/hw/arm/msf2-som.c
@@ -47,7 +47,6 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
     DeviceState *dev;
     DeviceState *spi_flash;
     MSF2State *soc;
-    MachineClass *mc = MACHINE_GET_CLASS(machine);
     DriveInfo *dinfo = drive_get(IF_MTD, 0, 0);
     qemu_irq cs_line;
     BusState *spi_bus;
@@ -55,20 +54,12 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
     MemoryRegion *ddr = g_new(MemoryRegion, 1);
     Clock *m3clk;
 
-    if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) {
-        error_report("This board can only be used with CPU %s",
-                     mc->default_cpu_type);
-        exit(1);
-    }
-
     memory_region_init_ram(ddr, NULL, "ddr-ram", DDR_SIZE,
                            &error_fatal);
     memory_region_add_subregion(sysmem, DDR_BASE_ADDRESS, ddr);
 
     dev = qdev_new(TYPE_MSF2_SOC);
     qdev_prop_set_string(dev, "part-name", "M2S010");
-    qdev_prop_set_string(dev, "cpu-type", mc->default_cpu_type);
-
     qdev_prop_set_uint64(dev, "eNVM-size", M2S010_ENVM_SIZE);
     qdev_prop_set_uint64(dev, "eSRAM-size", M2S010_ESRAM_SIZE);
 
@@ -106,9 +97,14 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
 
 static void emcraft_sf2_machine_init(MachineClass *mc)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m3"),
+        NULL
+    };
+
     mc->desc = "SmartFusion2 SOM kit from Emcraft (M2S010)";
     mc->init = emcraft_sf2_s2s010_init;
-    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
+    mc->valid_cpu_types = machine_valid_cpu_types;
 }
 
 DEFINE_MACHINE("emcraft-sf2", emcraft_sf2_machine_init)
-- 
2.41.0

[PATCH-for-9.0 5/6] hw/arm/npcm7xx_boards: Simplify setting MachineClass::valid_cpu_types[]

[Philippe Mathieu-Daudé]

The npcm7xx Soc is created with a Cortex-A9 core, see in
hw/arm/npcm7xx.c:

  static void npcm7xx_init(Object *obj)
  {
      NPCM7xxState *s = NPCM7XX(obj);

      for (int i = 0; i < NPCM7XX_MAX_NUM_CPUS; i++) {
          object_initialize_child(obj, "cpu[*]", &s->cpu[i],
                                  ARM_CPU_TYPE_NAME("cortex-a9"));
      }

The MachineClass::default_cpu_type field is ignored: delete it.

Use the common code introduced in commit c9cf636d48 ("machine: Add
a valid_cpu_types property") to check for valid CPU type at the
board level.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/npcm7xx_boards.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
index 2aef579aac..98f9af27e7 100644
--- a/hw/arm/npcm7xx_boards.c
+++ b/hw/arm/npcm7xx_boards.c
@@ -121,15 +121,8 @@ static NPCM7xxState *npcm7xx_create_soc(MachineState *machine,
                                         uint32_t hw_straps)
 {
     NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_GET_CLASS(machine);
-    MachineClass *mc = MACHINE_CLASS(nmc);
     Object *obj;
 
-    if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) {
-        error_report("This board can only be used with %s",
-                     mc->default_cpu_type);
-        exit(1);
-    }
-
     obj = object_new_with_props(nmc->soc_type, OBJECT(machine), "soc",
                                 &error_abort, NULL);
     object_property_set_uint(obj, "power-on-straps", hw_straps, &error_abort);
@@ -462,13 +455,17 @@ static void npcm7xx_set_soc_type(NPCM7xxMachineClass *nmc, const char *type)
 
 static void npcm7xx_machine_class_init(ObjectClass *oc, void *data)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-a9"),
+        NULL
+    };
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->no_floppy = 1;
     mc->no_cdrom = 1;
     mc->no_parallel = 1;
     mc->default_ram_id = "ram";
-    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a9");
+    mc->valid_cpu_types = machine_valid_cpu_types;
 }
 
 /*
-- 
2.41.0

[PATCH-for-9.0 6/6] hw/arm/musca: Simplify setting MachineClass::valid_cpu_types[]

[Philippe Mathieu-Daudé]

Musca boards use the embedded subsystems (SSE) tied to a specific
Cortex core. Our models only use the Cortex-M33.

Use the common code introduced in commit c9cf636d48 ("machine: Add
a valid_cpu_types property") to check for valid CPU type at the
board level.

Remove the now unused MachineClass::default_cpu_type field.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/musca.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/hw/arm/musca.c b/hw/arm/musca.c
index 6eeee57c9d..d3658354ba 100644
--- a/hw/arm/musca.c
+++ b/hw/arm/musca.c
@@ -355,7 +355,6 @@ static void musca_init(MachineState *machine)
 {
     MuscaMachineState *mms = MUSCA_MACHINE(machine);
     MuscaMachineClass *mmc = MUSCA_MACHINE_GET_CLASS(mms);
-    MachineClass *mc = MACHINE_GET_CLASS(machine);
     MemoryRegion *system_memory = get_system_memory();
     DeviceState *ssedev;
     DeviceState *dev_splitter;
@@ -366,12 +365,6 @@ static void musca_init(MachineState *machine)
     assert(mmc->num_irqs <= MUSCA_NUMIRQ_MAX);
     assert(mmc->num_mpcs <= MUSCA_MPC_MAX);
 
-    if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) {
-        error_report("This board can only be used with CPU %s",
-                     mc->default_cpu_type);
-        exit(1);
-    }
-
     mms->sysclk = clock_new(OBJECT(machine), "SYSCLK");
     clock_set_hz(mms->sysclk, SYSCLK_FRQ);
     mms->s32kclk = clock_new(OBJECT(machine), "S32KCLK");
@@ -603,12 +596,16 @@ static void musca_init(MachineState *machine)
 
 static void musca_class_init(ObjectClass *oc, void *data)
 {
+    static const char *machine_valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m33"),
+        NULL
+    };
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->default_cpus = 2;
     mc->min_cpus = mc->default_cpus;
     mc->max_cpus = mc->default_cpus;
-    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m33");
+    mc->valid_cpu_types = machine_valid_cpu_types;
     mc->init = musca_init;
 }
 
-- 
2.41.0

Re: [PATCH-for-8.2? 1/6] hw/arm/stm32f405: Report error when incorrect CPU is used

[Philippe Mathieu-Daudé]

On 16/11/23 00:21, Philippe Mathieu-Daudé wrote:
> Both 'netduinoplus2' and 'olimex-stm32-h405' machines ignore the
> CPU type requested by the command line. This might confuse users,
> since the following will create a machine with a Cortex-M4 CPU:
> 
>    $ qemu-system-aarch64 -M netduinoplus2 -cpu cortex-r5f
> 
> Set the MachineClass::valid_cpu_types field (introduced in commit
> c9cf636d48 "machine: Add a valid_cpu_types property").
> Remove the now unused MachineClass::default_cpu_type field.
> 
> We now get:
> 
>    $ qemu-system-aarch64 -M netduinoplus2 -cpu cortex-r5f
>    qemu-system-aarch64: Invalid CPU type: cortex-r5f-arm-cpu
>    The valid types are: cortex-m4-arm-cpu
> 
> Since the SoC family can only use Cortex-M4 CPUs, hard-code the
> CPU type name at the SoC level, removing the QOM property
> entirely.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   include/hw/arm/stm32f405_soc.h | 4 ----
>   hw/arm/netduinoplus2.c         | 7 ++++++-
>   hw/arm/olimex-stm32-h405.c     | 8 ++++++--
>   hw/arm/stm32f405_soc.c         | 8 +-------
>   4 files changed, 13 insertions(+), 14 deletions(-)


> diff --git a/hw/arm/olimex-stm32-h405.c b/hw/arm/olimex-stm32-h405.c
> index 3aa61c91b7..694b1dd6ed 100644
> --- a/hw/arm/olimex-stm32-h405.c
> +++ b/hw/arm/olimex-stm32-h405.c
> @@ -47,7 +47,6 @@ static void olimex_stm32_h405_init(MachineState *machine)
>       clock_set_hz(sysclk, SYSCLK_FRQ);
>   
>       dev = qdev_new(TYPE_STM32F405_SOC);
> -    qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
>       qdev_connect_clock_in(dev, "sysclk", sysclk);
>       sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
>   
> @@ -58,9 +57,14 @@ static void olimex_stm32_h405_init(MachineState *machine)
>   
>   static void olimex_stm32_h405_machine_init(MachineClass *mc)
>   {
> +    static const char *machine_valid_cpu_types[] = {

const char * const

(in all this series).

> +        ARM_CPU_TYPE_NAME("cortex-m4"),
> +        NULL
> +    };
> +
>       mc->desc = "Olimex STM32-H405 (Cortex-M4)";
>       mc->init = olimex_stm32_h405_init;
> -    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m4");
> +    mc->valid_cpu_types = machine_valid_cpu_types;
>   
>       /* SRAM pre-allocated as part of the SoC instantiation */
>       mc->default_ram_size = 0;

Re: [PATCH-for-8.2? 3/6] hw/arm/stm32f100: Report error when incorrect CPU is used

[Philippe Mathieu-Daudé]

On 16/11/23 00:21, Philippe Mathieu-Daudé wrote:
> The 'stm32vldiscovery' machine ignores the CPU type requested by
> the command line. This might confuse users, since the following
> will create a machine with a Cortex-M3 CPU:
> 
>    $ qemu-system-aarch64 -M stm32vldiscovery -cpu neoverse-n1
> 
> Set the MachineClass::valid_cpu_types field (introduced in commit
> c9cf636d48 "machine: Add a valid_cpu_types property").
> Remove the now unused MachineClass::default_cpu_type field.
> 
> We now get:
> 
>    $ qemu-system-aarch64 -M stm32vldiscovery -cpu neoverse-n1
>    qemu-system-aarch64: Invalid CPU type: neoverse-n1-arm-cpu
>    The valid types are: cortex-m3-arm-cpu

With [2] from cover applied, this becomes:

      $ qemu-system-aarch64 -M stm32vldiscovery -cpu neoverse-n1 -S
      qemu-system-aarch64: Invalid CPU type: neoverse-n1
      The valid types are: cortex-m3

> Since the SoC family can only use Cortex-M3 CPUs, hard-code the
> CPU type name at the SoC level, removing the QOM property
> entirely.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   include/hw/arm/stm32f100_soc.h | 4 ----
>   hw/arm/stm32f100_soc.c         | 9 ++-------
>   hw/arm/stm32vldiscovery.c      | 7 ++++++-
>   3 files changed, 8 insertions(+), 12 deletions(-)

[2] 
https://lore.kernel.org/qemu-devel/20231114235628.534334-1-gshan@redhat.com/

Re: [PATCH-for-8.2? 0/6] hw/arm/stm32xxx: Report error when incorrect CPU is used

[Richard Henderson]

On 11/15/23 15:21, Philippe Mathieu-Daudé wrote:
> Philippe Mathieu-Daudé (6):
>    hw/arm/stm32f405: Report error when incorrect CPU is used
>    hw/arm/stm32f205: Report error when incorrect CPU is used
>    hw/arm/stm32f100: Report error when incorrect CPU is used
>    hw/arm/msf2: Simplify setting MachineClass::valid_cpu_types[]
>    hw/arm/npcm7xx_boards: Simplify setting
>      MachineClass::valid_cpu_types[]
>    hw/arm/musca: Simplify setting MachineClass::valid_cpu_types[]

With the const fix,

Series
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~