[PATCH v2 0/9] machine: uniquify virt QOM names

[PATCH v2 0/9] machine: uniquify virt QOM names

[Yonggang Luo]

Multiple targets register a virt board as MACHINE_TYPE_NAME("virt").
Those QOM types collide if more than one board is linked into one
qemu-system process. This series splits the QOM type from the -M name
so each virt board can keep a unique type while -M virt, help, and
migration stay the same.

- Add machine_class_set_name() so boards can set MachineClass::name
  when it must differ from the QOM type. machine_class_base_init still
  defaults the name to the QOM type without -machine. Document that
  MachineClass::name is the -M name, not the QOM type. Sort -M help
  by that name so order matches the printed names after types are
  prefixed (arm-virt-11.1-machine vs virt-11.1).
- Give each colliding virt board a unique QOM type and keep the
  existing -M name via machine_class_set_name(): riscv-virt, arm-virt,
  or1k-virt, hexagon-virt, loongarch-virt, m68k-virt, and xtensa-virt.
  Versioned ARM, LoongArch, and M68K boards keep virt-<ver>. Latest
  ARM virt still sets mc->alias to virt.
- query-machines returns MachineInfo typename, the QOM type from
  object_class_get_name(), for qom-list-properties. The -M name alone
  is not that type once virt boards are prefixed.

Changes v1 -> v2:
- query-machines returns MachineInfo typename. v1 returned only the
  -M name, so a client that appended "-machine" looked up the wrong
  type for a prefixed board such as arm-virt-11.1-machine versus
  -M virt-11.1.

Yonggang Luo (9):
  machine: allow -M name to differ from QOM type
  hw/riscv/virt: use unique QOM name
  hw/arm/virt: use unique QOM name
  hw/or1k/virt: use unique QOM name
  hw/hexagon/virt: use unique QOM name
  hw/loongarch/virt: use unique QOM name
  hw/m68k/virt: use unique QOM name
  hw/xtensa/virt: use unique QOM name
  qapi: return MachineInfo typename from query-machines

 hw/arm/virt.c               |  3 +-
 hw/core/machine-qmp-cmds.c  |  1 +
 hw/core/machine.c           |  6 ++++
 hw/hexagon/virt.c           |  1 +
 hw/loongarch/virt.c         |  3 +-
 hw/m68k/virt.c              |  7 ++--
 hw/or1k/virt.c              |  3 +-
 hw/riscv/virt.c             |  3 +-
 hw/xtensa/virt.c            |  3 +-
 include/hw/arm/virt.h       |  2 +-
 include/hw/core/boards.h    | 12 ++++++-
 include/hw/hexagon/virt.h   |  2 +-
 include/hw/loongarch/virt.h |  2 +-
 include/hw/riscv/virt.h     |  2 +-
 qapi/machine.json           |  6 +++-
 system/vl.c                 |  8 ++---
 tests/qtest/qom-test.c      | 65 +++++++++++++++++++++++++++++++++----
 17 files changed, 104 insertions(+), 25 deletions(-)

-- 
2.52.0.windows.1

[PATCH v2 1/9] machine: allow -M name to differ from QOM type

[Yonggang Luo]

- Add machine_class_set_name() so boards can keep a stable -M name
  when the QOM type is uniquified. machine_class_base_init still
  defaults the name to the QOM type without -machine.
- Document that MachineClass::name is the -M name, not the QOM type.
- Sort -M help by MachineClass::name so order matches the printed names
  when QOM types are prefixed (arm-virt-11.1-machine vs virt-11.1).

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
---
 hw/core/machine.c        |  6 ++++++
 include/hw/core/boards.h | 12 +++++++++++-
 system/vl.c              |  8 +++-----
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/hw/core/machine.c b/hw/core/machine.c
index 92f7be52a13..6b933f2302d 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -1215,6 +1215,12 @@ static void machine_class_init(ObjectClass *oc, const void *data)
         "Memory size configuration");
 }
 
+void machine_class_set_name(MachineClass *mc, const char *name)
+{
+    g_free(mc->name);
+    mc->name = g_strdup(name);
+}
+
 static void machine_class_base_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
diff --git a/include/hw/core/boards.h b/include/hw/core/boards.h
index 3b86724cf00..851140ad052 100644
--- a/include/hw/core/boards.h
+++ b/include/hw/core/boards.h
@@ -36,6 +36,16 @@ const char *machine_default_cpu_type(const MachineState *ms);
  * @mc: Machine class
  */
 const char *machine_class_default_cpu_type(MachineClass *mc);
+/**
+ * machine_class_set_name: Set the -M name when it differs from the QOM type
+ * @mc: Machine class
+ * @name: Name used by -M lookup, help, and migration
+ *
+ * machine_class_base_init sets MachineClass::name from the QOM type with
+ * the -machine suffix removed. Call this from board class_init when the
+ * CLI name must stay stable after the QOM type is uniquified.
+ */
+void machine_class_set_name(MachineClass *mc, const char *name);
 
 void machine_add_audiodev_property(MachineClass *mc);
 void machine_run_board_init(MachineState *machine, const char *mem_path, Error **errp);
@@ -269,7 +279,7 @@ struct MachineClass {
     /*< public >*/
 
     const char *family; /* NULL iff @name identifies a standalone machtype */
-    char *name;
+    char *name; /* -M name; default is QOM type without -machine */
     const char *alias;
     const char *desc;
     const char *deprecation_reason;
diff --git a/system/vl.c b/system/vl.c
index 468a9fc247a..0d52c5d0a46 100644
--- a/system/vl.c
+++ b/system/vl.c
@@ -1538,10 +1538,9 @@ static gint machine_class_cmp(gconstpointer a, gconstpointer b, gpointer d)
     if (mc1->family == NULL) {
         if (mc2->family == NULL) {
             /* Compare standalone machine types against each other; they sort
-             * in increasing order.
+             * in increasing order by the name shown in -M help.
              */
-            return strcmp(object_class_get_name(OBJECT_CLASS(mc1)),
-                          object_class_get_name(OBJECT_CLASS(mc2)));
+            return strcmp(mc1->name, mc2->name);
         }
 
         /* Standalone machine types sort after families. */
@@ -1560,8 +1559,7 @@ static gint machine_class_cmp(gconstpointer a, gconstpointer b, gpointer d)
     }
 
     /* Within the same family, machine types sort in decreasing order. */
-    return strcmp(object_class_get_name(OBJECT_CLASS(mc2)),
-                  object_class_get_name(OBJECT_CLASS(mc1)));
+    return strcmp(mc2->name, mc1->name);
 }
 
 static void machine_help_func(const QDict *qdict)
-- 
2.52.0.windows.1

Re: [PATCH v2 1/9] machine: allow -M name to differ from QOM type

[Pierrick Bouvier]

Hi Yonggang,

On 9/22/26 2:55 PM, Yonggang Luo wrote:
> - Add machine_class_set_name() so boards can keep a stable -M name
>    when the QOM type is uniquified. machine_class_base_init still
>    defaults the name to the QOM type without -machine.
> - Document that MachineClass::name is the -M name, not the QOM type.
> - Sort -M help by MachineClass::name so order matches the printed names
>    when QOM types are prefixed (arm-virt-11.1-machine vs virt-11.1).
> 
> Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
> ---
>   hw/core/machine.c        |  6 ++++++
>   include/hw/core/boards.h | 12 +++++++++++-
>   system/vl.c              |  8 +++-----
>   3 files changed, 20 insertions(+), 6 deletions(-)
> 

this indeed allows QOM types to coexist in same binary.
In such binary, how are we now supposed to differentiate two virt 
machines from -M <name>, given they both have same alias name?

Regards,
Pierrick

Re: [PATCH v2 1/9] machine: allow -M name to differ from QOM type

[Yonggang Luo]

[-- Attachment #1: Type: text/plain, Size: 6530 bytes --]

On Wed, Sep 23, 2026 at 1:01 PM Pierrick Bouvier <
pierrick.bouvier@oss.qualcomm.com> wrote:
>
> this indeed allows QOM types to coexist in same binary.
> In such binary, how are we now supposed to differentiate two virt
> machines from -M <name>, given they both have same alias name?
>
> Regards,
> Pierrick


# Machine option demos

Intended design for combined `qemu-system`. Implement to match these
rows. Last `-M` / `-machine` / `-readconfig` wins. `qemu.conf` is
applied first.

`arch:name` binds `arch` and picks `name`. `arch:` binds `arch`.
`x86_64:` and `i386:` then run that target's default machine.
`aarch64:` and `riscv64:` have no default and exit with
`No machine specified, and there is no default`. A later bare
`name` keeps the last prefix. Help / `?` after `arch:` lists that
target; it does not leave the target at `none`.

Single-target rows are historic `qemu-system-<arch>` and stay as they
are.

## Bind and run

| Command | Shows |
|---------|-------|
| `qemu-system -M aarch64:virt` | Bind `aarch64`, run `virt`. |
| `qemu-system -M x86_64:q35` | Bind `x86_64`, run `q35`. |
| `qemu-system -M riscv64:virt` | Bind `riscv64`, run `virt`. |
| `qemu-system -M type=aarch64:virt` | Same as `-M aarch64:virt`. |
| `qemu-system -machine aarch64:virt` | Same as `-M`. |
| `qemu-system-aarch64 -M virt` | Historic. No `arch:` bind. |
| `qemu-system-x86_64` | Single-target default (`pc` / `q35`). |

## Default machine (`arch:`)

| Command | Shows |
|---------|-------|
| `qemu-system -M x86_64:` | Bind `x86_64`, run that target's default. |
| `qemu-system -M i386:` | Bind `i386`, run that target's default. |
| `qemu-system -M aarch64:` | Bind `aarch64`, then `No machine specified,
and there is no default`. |
| `qemu-system -M riscv64:` | Bind `riscv64`, then the same error. |
| `qemu-system -M none:` | Target `none`, empty `none` machine. |

## List

| Command | Shows |
|---------|-------|
| `qemu-system -M help` | Grouped list. `none:` first, then each target. |
| `qemu-system -M ?` | Same as `-M help`. |
| `qemu-system -M aarch64:help` | Flat list for `aarch64` only. |
| `qemu-system -M aarch64:?` | Same as `-M aarch64:help`. |
| `qemu-system -M riscv64:help` | Flat list for `riscv64` only. |
| `qemu-system -M none:help` | `none` and `empty machine`. No other target
group. |
| `qemu-system-aarch64 -M help` | Flat list for that target only. |

## Empty machine

| Command | Shows |
|---------|-------|
| `qemu-system` | Target `none`, empty `none` machine. |
| `qemu-system -M none` | Empty `none` machine. |
| `qemu-system -M none:none` | Same. |
| `qemu-system -M aarch64:none` | Target `aarch64`, empty `none` machine. |
| `qemu-system -M aarch64:virt -M none` | Empty `none` machine. Target
stays `aarch64`. |

## Properties

| Command | Shows |
|---------|-------|
| `qemu-system -M aarch64:virt,help` | Bind `aarch64`, dump `virt`
properties. |
| `qemu-system -M aarch64:,help` | `No machine specified, and there is no
default`. |
| `qemu-system -M virt,help` | `machine type "virt" needs an arch: prefix`.
|
| `qemu-system -M none,help` | Dump empty `none` machine properties. |
| `qemu-system-aarch64 -M virt,help` | Historic property dump for `virt`. |

## Last `-M` wins

| Command | Shows |
|---------|-------|
| `qemu-system -M aarch64:virt -M x86_64:q35` | Target `x86_64`, machine
`q35`. |
| `qemu-system -M aarch64:virt -M virt` | Last name is `virt`. Keep prefix
`aarch64`, run `virt`. |
| `qemu-system -M virt -M aarch64:virt` | Target `aarch64`, machine `virt`.
|
| `qemu-system -M aarch64: -M virt` | Bind `aarch64`, then bare `virt` runs
`virt`. |
| `qemu-system -M aarch64:virt -M riscv64:` | Bind `riscv64`, then `No
machine specified, and there is no default`. |
| `qemu-system -M aarch64:virt -M riscv64:virt` | Target `riscv64`, machine
`virt`. |
| `qemu-system -M help -M aarch64:virt` | Help is not last; run
`aarch64:virt`. |
| `qemu-system -M aarch64:virt -M help` | Keep prefix `aarch64`. List has
`virt`, not `q35`. |

## `-readconfig`

A `[machine] type = "..."` file is another machine option. The last
of `-M`, `-machine`, and `-readconfig` wins.

| Command | Shows |
|---------|-------|
| `-readconfig` with `type = "aarch64:virt"` | Bind `aarch64`, run `virt`. |
| that file, then `-M none` | Machine `none`. Target stays `aarch64`. |
| `-readconfig` with `type = "none:"` | Target `none`, empty `none`
machine. |
| `-M aarch64:virt`, then `-readconfig` `type = "riscv64:virt"` | Target
`riscv64`, machine `virt`. |

## Wrong target or machine

| Command | Shows |
|---------|-------|
| `qemu-system -M virt` | `machine type "virt" needs an arch: prefix` |
| `qemu-system -M riscv64` | Same. Bare `riscv64` is a machine name, not a
target. |
| `qemu-system -M aarch64` | Same. Bare `aarch64` is a machine name, not a
target. |
| `qemu-system -M aarch64:q35` | Target `aarch64`, then `unsupported
machine type: "aarch64:q35"` |
| `qemu-system -M arm:sbsa-ref` | Target `arm`, then unsupported
(`sbsa-ref` is `aarch64` only). |
| `qemu-system -M aarch64:no-such` | Target `aarch64`, then `unsupported
machine type: "aarch64:no-such"` |
| `qemu-system -M no-such:virt` | `target 'no-such' is not available` |
| `qemu-system -M AARCH64:virt` | `target 'AARCH64' is not available`
(names are lowercase). |
| `qemu-system -M none:virt` | `machine type "none:virt" is not available
for target none` |

## Odd strings

| Command | Shows |
|---------|-------|
| `qemu-system -M :virt` | Not a prefix. Same as bare `virt`: needs
`arch:`. |
| `qemu-system -M :` | Not a prefix. Unsupported machine `:` / needs
`arch:`. |
| `qemu-system -M aarch64:virt:extra` | First colon only. Name is
`virt:extra`. Unsupported machine. |
| `qemu-system-x86_64 -M aarch64:virt` | Prefix `aarch64` != `x86_64`. Not
available for this target. |
| `qemu-system-aarch64 -M aarch64:virt` | Prefix matches. Run `virt`. |

## Intended grouped `-M help` (no target)

| Group | Contents |
|-------|----------|
| `none:` | only `none` |
| `i386:` and `x86_64:` | pc / q35 / isapc / microvm / xen / nitro |
| `arm:` and `aarch64:` | `virt-*` and 32-bit ARM boards |
| `aarch64:` only | sbsa-ref, versal, zcu102, imx8, npcm845, raspi3/4,
ast2700 |
| `riscv32:` and `riscv64:` | RISC-V boards |
| `microblaze:` | petalogix and xlnx-zynqmp-pmu |


--
         此致
礼
罗勇刚
Yours
    sincerely,
Yonggang Luo

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Re: [PATCH v2 1/9] machine: allow -M name to differ from QOM type

[marcandre.lureau]

> - Add machine_class_set_name() so boards can keep a stable -M name
>   when the QOM type is uniquified. machine_class_base_init still
>   defaults the name to the QOM type without -machine.
> - Document that MachineClass::name is the -M name, not the QOM type.
> - Sort -M help by MachineClass::name so order matches the printed names
>   when QOM types are prefixed (arm-virt-11.1-machine vs virt-11.1).
> 
> Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
> Message-ID: <20260922215533.641-2-luoyonggang@gmail.com>
>
> diff --git a/hw/core/machine.c b/hw/core/machine.c
> index 92f7be52a13f..6b933f2302d5 100644
> --- a/hw/core/machine.c
> +++ b/hw/core/machine.c
> @@ -1215,6 +1215,12 @@ static void machine_class_init(ObjectClass *oc, const void *data)
>          "Memory size configuration");
>  }
>  
> +void machine_class_set_name(MachineClass *mc, const char *name)
> +{
> +    g_free(mc->name);
> +    mc->name = g_strdup(name);
> +}
> +
>  static void machine_class_base_init(ObjectClass *oc, const void *data)
>  {
>      MachineClass *mc = MACHINE_CLASS(oc);
> diff --git a/include/hw/core/boards.h b/include/hw/core/boards.h
> index 3b86724cf007..851140ad0520 100644
> --- a/include/hw/core/boards.h
> +++ b/include/hw/core/boards.h
> @@ -36,6 +36,16 @@ const char *machine_default_cpu_type(const MachineState *ms);
>   * @mc: Machine class
>   */
>  const char *machine_class_default_cpu_type(MachineClass *mc);
> +/**
> + * machine_class_set_name: Set the -M name when it differs from the QOM type
> + * @mc: Machine class
> + * @name: Name used by -M lookup, help, and migration
> + *
> + * machine_class_base_init sets MachineClass::name from the QOM type with
> + * the -machine suffix removed. Call this from board class_init when the
> + * CLI name must stay stable after the QOM type is uniquified.
> + */
> +void machine_class_set_name(MachineClass *mc, const char *name);

add machine_class_set_name() to the comment example around line 484:

Add after the existing mc->desc line in the example:
 *          machine_class_set_name(mc, "virt-" MACHINE_VER_STR(__VA_ARGS__)); \

And update the example's type name from "virt" to show a prefixed name like
"arm-virt" so it matches the real usage pattern.

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 2/9] hw/riscv/virt: use unique QOM name

[Yonggang Luo]

Use TYPE_RISCV_VIRT_MACHINE so the RISC-V virt QOM type does not
collide with ARM virt in a combined qemu-system binary. Keep the
-M / help / migration name as virt via machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/riscv/virt.c         | 3 ++-
 include/hw/riscv/virt.h | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index d4b501802f6..b29182cb39b 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -1134,6 +1134,7 @@ static void virt_machine_class_init(ObjectClass *oc, const void *data)
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 
     mc->desc = "RISC-V VirtIO board";
+    machine_class_set_name(mc, "virt");
     mc->init = virt_machine_init;
     mc->max_cpus = VIRT_CPUS_MAX;
     mc->default_cpu_type = TYPE_RISCV_CPU_BASE;
@@ -1197,7 +1198,7 @@ static void virt_machine_class_init(ObjectClass *oc, const void *data)
 }
 
 static const TypeInfo virt_machine_typeinfo = {
-    .name       = MACHINE_TYPE_NAME("virt"),
+    .name       = TYPE_RISCV_VIRT_MACHINE,
     .parent     = TYPE_MACHINE,
     .class_init = virt_machine_class_init,
     .instance_init = virt_machine_instance_init,
diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
index e516898f9ad..969aa5866ee 100644
--- a/include/hw/riscv/virt.h
+++ b/include/hw/riscv/virt.h
@@ -30,7 +30,7 @@
 #define VIRT_SOCKETS_MAX_BITS          2
 #define VIRT_SOCKETS_MAX               (1 << VIRT_SOCKETS_MAX_BITS)
 
-#define TYPE_RISCV_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
+#define TYPE_RISCV_VIRT_MACHINE MACHINE_TYPE_NAME("riscv-virt")
 typedef struct RISCVVirtState RISCVVirtState;
 DECLARE_INSTANCE_CHECKER(RISCVVirtState, RISCV_VIRT_MACHINE,
                          TYPE_RISCV_VIRT_MACHINE)
-- 
2.52.0.windows.1

Re: [PATCH v2 2/9] hw/riscv/virt: use unique QOM name

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:25 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> Use TYPE_RISCV_VIRT_MACHINE so the RISC-V virt QOM type does not
> collide with ARM virt in a combined qemu-system binary. Keep the
> -M / help / migration name as virt via machine_class_set_name().

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 3/9] hw/arm/virt: use unique QOM name

[Yonggang Luo]

Set TYPE_VIRT_MACHINE to MACHINE_TYPE_NAME("arm-virt") so ARM virt
no longer collides with other virt-machine types in one process.
Keep the -M / help / migration name as virt-* via
machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/arm/virt.c         | 3 ++-
 include/hw/arm/virt.h | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 3eecf094bcc..c8ffa1ceaf4 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -123,13 +123,14 @@ static void arm_virt_compat_default_set(MachineClass *mc)
         MACHINE_VER_SYM(options, virt, __VA_ARGS__)(mc); \
         mc->desc = "QEMU " MACHINE_VER_STR(__VA_ARGS__) " ARM Virtual Machine"; \
         MACHINE_VER_DEPRECATION(__VA_ARGS__); \
+        machine_class_set_name(mc, "virt-" MACHINE_VER_STR(__VA_ARGS__)); \
         if (latest) { \
             mc->alias = "virt"; \
         } \
     } \
     static const TypeInfo MACHINE_VER_SYM(info, virt, __VA_ARGS__) = \
     { \
-        .name = MACHINE_VER_TYPE_NAME("virt", __VA_ARGS__), \
+        .name = MACHINE_VER_TYPE_NAME("arm-virt", __VA_ARGS__), \
         .parent = TYPE_VIRT_MACHINE, \
         .class_init = MACHINE_VER_SYM(class_init, virt, __VA_ARGS__), \
     }; \
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 22e66d1a113..383ee320948 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -215,7 +215,7 @@ struct VirtMachineState {
 
 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM)
 
-#define TYPE_VIRT_MACHINE   MACHINE_TYPE_NAME("virt")
+#define TYPE_VIRT_MACHINE   MACHINE_TYPE_NAME("arm-virt")
 OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE)
 
 void virt_acpi_setup(VirtMachineState *vms);
-- 
2.52.0.windows.1

Re: [PATCH v2 3/9] hw/arm/virt: use unique QOM name

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:26 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> Set TYPE_VIRT_MACHINE to MACHINE_TYPE_NAME("arm-virt") so ARM virt
> no longer collides with other virt-machine types in one process.
> Keep the -M / help / migration name as virt-* via
> machine_class_set_name().

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 4/9] hw/or1k/virt: use unique QOM name

[Yonggang Luo]

Set TYPE_VIRT_MACHINE to MACHINE_TYPE_NAME("or1k-virt") so OpenRISC
virt no longer collides with other virt-machine types in one process.
Keep the -M / help / migration name as virt via
machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/or1k/virt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/or1k/virt.c b/hw/or1k/virt.c
index 2ff5c084a2b..35884252379 100644
--- a/hw/or1k/virt.c
+++ b/hw/or1k/virt.c
@@ -34,7 +34,7 @@
 #define VIRT_CPUS_MAX 4
 #define VIRT_CLK_MHZ 20000000
 
-#define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
+#define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("or1k-virt")
 #define VIRT_MACHINE(obj) \
     OBJECT_CHECK(OR1KVirtState, (obj), TYPE_VIRT_MACHINE)
 
@@ -548,6 +548,7 @@ static void openrisc_virt_machine_init(ObjectClass *oc, const void *data)
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->desc = "or1k virtual machine";
+    machine_class_set_name(mc, "virt");
     mc->init = openrisc_virt_init;
     mc->max_cpus = VIRT_CPUS_MAX;
     mc->is_default = false;
-- 
2.52.0.windows.1

Re: [PATCH v2 4/9] hw/or1k/virt: use unique QOM name

[marcandre.lureau]

> Set TYPE_VIRT_MACHINE to MACHINE_TYPE_NAME("or1k-virt") so OpenRISC
> virt no longer collides with other virt-machine types in one process.
> Keep the -M / help / migration name as virt via
> machine_class_set_name().
> 
> Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
> Message-ID: <20260922215533.641-5-luoyonggang@gmail.com>
>
> diff --git a/hw/or1k/virt.c b/hw/or1k/virt.c
> index 2ff5c084a2b7..35884252379c 100644
> --- a/hw/or1k/virt.c
> +++ b/hw/or1k/virt.c
> @@ -34,7 +34,7 @@
>  #define VIRT_CPUS_MAX 4
>  #define VIRT_CLK_MHZ 20000000
>  
> -#define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
> +#define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("or1k-virt")
>  #define VIRT_MACHINE(obj) \
>      OBJECT_CHECK(OR1KVirtState, (obj), TYPE_VIRT_MACHINE)

While at it, rename it to TYPE_OR1K_VIRT_MACHINE?

>  
> @@ -548,6 +548,7 @@ static void openrisc_virt_machine_init(ObjectClass *oc, const void *data)
>      MachineClass *mc = MACHINE_CLASS(oc);
>  
>      mc->desc = "or1k virtual machine";
> +    machine_class_set_name(mc, "virt");
>      mc->init = openrisc_virt_init;
>      mc->max_cpus = VIRT_CPUS_MAX;
>      mc->is_default = false;

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 5/9] hw/hexagon/virt: use unique QOM name

[Yonggang Luo]

Set TYPE_HEXAGON_VIRT_MACHINE to MACHINE_TYPE_NAME("hexagon-virt") so
Hexagon virt no longer collides with other virt-machine types in one
process. Keep the -M / help / migration name as virt via
machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Brian Cain <brian.cain@oss.qualcomm.com>
---
 hw/hexagon/virt.c         | 1 +
 include/hw/hexagon/virt.h | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/hexagon/virt.c b/hw/hexagon/virt.c
index 64d8366d27d..04591066bef 100644
--- a/hw/hexagon/virt.c
+++ b/hw/hexagon/virt.c
@@ -359,6 +359,7 @@ static void virt_class_init(ObjectClass *oc, const void *data)
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->desc = "Hexagon Virtual Machine";
+    machine_class_set_name(mc, "virt");
     mc->init = virt_init;
     mc->default_cpu_type = HEXAGON_CPU_TYPE_NAME("v68");
     mc->default_ram_size = 4 * GiB;
diff --git a/include/hw/hexagon/virt.h b/include/hw/hexagon/virt.h
index 4ca2f1ef859..523c4858036 100644
--- a/include/hw/hexagon/virt.h
+++ b/include/hw/hexagon/virt.h
@@ -26,7 +26,7 @@ struct HexagonVirtMachineState {
 
 void hexagon_load_fdt(const struct HexagonVirtMachineState *vms);
 
-#define TYPE_HEXAGON_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
+#define TYPE_HEXAGON_VIRT_MACHINE MACHINE_TYPE_NAME("hexagon-virt")
 OBJECT_DECLARE_SIMPLE_TYPE(HexagonVirtMachineState, HEXAGON_VIRT_MACHINE)
 
 #endif /* HW_HEXAGONVIRT_H */
-- 
2.52.0.windows.1

Re: [PATCH v2 5/9] hw/hexagon/virt: use unique QOM name

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:28 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> Set TYPE_HEXAGON_VIRT_MACHINE to MACHINE_TYPE_NAME("hexagon-virt") so
> Hexagon virt no longer collides with other virt-machine types in one
> process. Keep the -M / help / migration name as virt via
> machine_class_set_name().

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 6/9] hw/loongarch/virt: use unique QOM name

[Yonggang Luo]

Set TYPE_LOONGARCH_VIRT_MACHINE to MACHINE_TYPE_NAME("loongarch-virt")
so LoongArch virt no longer collides with other virt-machine types in
one process. Keep the -M / help / migration name as virt-* via
machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/loongarch/virt.c         | 3 ++-
 include/hw/loongarch/virt.h | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 9c5371af9de..2b003443eb0 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -1543,6 +1543,7 @@ static void virt_class_init(ObjectClass *oc, const void *data)
         MACHINE_VER_SYM(options, virt, __VA_ARGS__)(mc); \
         mc->desc = "QEMU " MACHINE_VER_STR(__VA_ARGS__) " LoongArch Virtual Machine"; \
         MACHINE_VER_DEPRECATION(__VA_ARGS__); \
+        machine_class_set_name(mc, "virt-" MACHINE_VER_STR(__VA_ARGS__)); \
         if (latest) { \
             mc->alias = "virt"; \
             mc->is_default = true; \
@@ -1550,7 +1551,7 @@ static void virt_class_init(ObjectClass *oc, const void *data)
     } \
     static const TypeInfo MACHINE_VER_SYM(info, virt, __VA_ARGS__) = \
     { \
-        .name = MACHINE_VER_TYPE_NAME("virt", __VA_ARGS__), \
+        .name = MACHINE_VER_TYPE_NAME("loongarch-virt", __VA_ARGS__), \
         .parent = TYPE_LOONGARCH_VIRT_MACHINE, \
         .class_init = MACHINE_VER_SYM(class_init, virt, __VA_ARGS__), \
     }; \
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index d39a9bbf5dd..09529de48bd 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -130,7 +130,7 @@ struct LoongArchVirtMachineState {
     bool highmem_mmio;
 };
 
-#define TYPE_LOONGARCH_VIRT_MACHINE  MACHINE_TYPE_NAME("virt")
+#define TYPE_LOONGARCH_VIRT_MACHINE  MACHINE_TYPE_NAME("loongarch-virt")
 OBJECT_DECLARE_SIMPLE_TYPE(LoongArchVirtMachineState, LOONGARCH_VIRT_MACHINE)
 void virt_acpi_setup(LoongArchVirtMachineState *lvms);
 void virt_fdt_setup(LoongArchVirtMachineState *lvms);
-- 
2.52.0.windows.1

Re: [PATCH v2 6/9] hw/loongarch/virt: use unique QOM name

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:29 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> Set TYPE_LOONGARCH_VIRT_MACHINE to MACHINE_TYPE_NAME("loongarch-virt")
> so LoongArch virt no longer collides with other virt-machine types in
> one process. Keep the -M / help / migration name as virt-* via
> machine_class_set_name().

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 7/9] hw/m68k/virt: use unique QOM name

[Yonggang Luo]

Set the parent and versioned QOM types to m68k-virt so M68K virt no
longer collides with other virt-machine types in one process. Keep
the -M / help / migration name as virt-* via
machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/m68k/virt.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/hw/m68k/virt.c b/hw/m68k/virt.c
index 274970978ff..1faa178bdfc 100644
--- a/hw/m68k/virt.c
+++ b/hw/m68k/virt.c
@@ -323,7 +323,7 @@ static void virt_machine_class_init(ObjectClass *oc, const void *data)
 }
 
 static const TypeInfo virt_machine_info = {
-    .name       = MACHINE_TYPE_NAME("virt"),
+    .name       = MACHINE_TYPE_NAME("m68k-virt"),
     .parent     = TYPE_MACHINE,
     .abstract   = true,
     .class_init = virt_machine_class_init,
@@ -345,14 +345,15 @@ type_init(virt_machine_register_types)
         MACHINE_VER_SYM(options, virt, __VA_ARGS__)(mc); \
         mc->desc = "QEMU " MACHINE_VER_STR(__VA_ARGS__) " M68K Virtual Machine"; \
         MACHINE_VER_DEPRECATION(__VA_ARGS__); \
+        machine_class_set_name(mc, "virt-" MACHINE_VER_STR(__VA_ARGS__)); \
         if (latest) { \
             mc->alias = "virt"; \
         } \
     } \
     static const TypeInfo MACHINE_VER_SYM(info, virt, __VA_ARGS__) = \
     { \
-        .name = MACHINE_VER_TYPE_NAME("virt", __VA_ARGS__), \
-        .parent = MACHINE_TYPE_NAME("virt"), \
+        .name = MACHINE_VER_TYPE_NAME("m68k-virt", __VA_ARGS__), \
+        .parent = MACHINE_TYPE_NAME("m68k-virt"), \
         .class_init = MACHINE_VER_SYM(class_init, virt, __VA_ARGS__), \
     }; \
     static void MACHINE_VER_SYM(register, virt, __VA_ARGS__)(void) \
-- 
2.52.0.windows.1

Re: [PATCH v2 7/9] hw/m68k/virt: use unique QOM name

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:30 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> Set the parent and versioned QOM types to m68k-virt so M68K virt no
> longer collides with other virt-machine types in one process. Keep
> the -M / help / migration name as virt-* via
> machine_class_set_name().

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 8/9] hw/xtensa/virt: use unique QOM name

[Yonggang Luo]

Register the board as xtensa-virt so Xtensa virt no longer collides
with other virt-machine types in one process. Keep the -M / help /
migration name as virt via machine_class_set_name().

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/xtensa/virt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/xtensa/virt.c b/hw/xtensa/virt.c
index 271f06e0953..dc5b255b9b1 100644
--- a/hw/xtensa/virt.c
+++ b/hw/xtensa/virt.c
@@ -118,10 +118,11 @@ static void xtensa_virt_init(MachineState *machine)
 static void xtensa_virt_machine_init(MachineClass *mc)
 {
     mc->desc = "virt machine (" XTENSA_DEFAULT_CPU_MODEL ")";
+    machine_class_set_name(mc, "virt");
     mc->init = xtensa_virt_init;
     mc->max_cpus = 32;
     mc->default_cpu_type = XTENSA_DEFAULT_CPU_TYPE;
     mc->default_nic = "virtio-net-pci";
 }
 
-DEFINE_MACHINE("virt", xtensa_virt_machine_init)
+DEFINE_MACHINE("xtensa-virt", xtensa_virt_machine_init)
-- 
2.52.0.windows.1

Re: [PATCH v2 8/9] hw/xtensa/virt: use unique QOM name

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:31 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> Register the board as xtensa-virt so Xtensa virt no longer collides
> with other virt-machine types in one process. Keep the -M / help /
> migration name as virt via machine_class_set_name().

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>

[PATCH v2 9/9] qapi: return MachineInfo typename from query-machines

[Yonggang Luo]

query-machines returned only the -M name, so management apps inferred
the QOM type as that name plus "-machine". A prefixed type such as
arm-virt-11.1-machine no longer matches -M virt-11.1. Return the QOM
type in MachineInfo typename from object_class_get_name() in
qmp_query_machines(). test_query_machines_typename checks that
qom-list-properties accepts it.

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 hw/core/machine-qmp-cmds.c |  1 +
 qapi/machine.json          |  6 +++-
 tests/qtest/qom-test.c     | 65 ++++++++++++++++++++++++++++++++++----
 3 files changed, 65 insertions(+), 7 deletions(-)

diff --git a/hw/core/machine-qmp-cmds.c b/hw/core/machine-qmp-cmds.c
index 9c08b17510a..27ceed54a14 100644
--- a/hw/core/machine-qmp-cmds.c
+++ b/hw/core/machine-qmp-cmds.c
@@ -116,6 +116,7 @@ MachineInfoList *qmp_query_machines(bool has_compat_props, bool compat_props,
         }
 
         info->name = g_strdup(mc->name);
+        info->q_typename = g_strdup(object_class_get_name(OBJECT_CLASS(mc)));
         info->cpu_max = !mc->max_cpus ? 1 : mc->max_cpus;
         info->hotpluggable_cpus = mc->has_hotpluggable_cpus;
         info->numa_mem_supported = mc->numa_mem_supported;
diff --git a/qapi/machine.json b/qapi/machine.json
index b1be5608b61..f5ead98e174 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -168,6 +168,9 @@
 #
 # @name: the name of the machine
 #
+# @typename: QOM type name of the machine, for qom-list-properties
+#     (since 11.2)
+#
 # @alias: an alias for the machine name
 #
 # @is-default: whether the machine is default
@@ -208,7 +211,7 @@
 # Since: 1.2
 ##
 { 'struct': 'MachineInfo',
-  'data': { 'name': 'str', '*alias': 'str',
+  'data': { 'name': 'str', 'typename': 'str', '*alias': 'str',
             '*is-default': 'bool', 'cpu-max': 'int',
             'hotpluggable-cpus': 'bool',  'numa-mem-supported': 'bool',
             'deprecated': 'bool', '*default-cpu-type': 'str',
@@ -238,6 +241,7 @@
 #               {
 #                  "hotpluggable-cpus": true,
 #                  "name": "pc-q35-6.2",
+#                  "typename": "pc-q35-6.2-machine",
 #                  "compat-props": [
 #                       {
 #                          "qom-type": "virtio-mem",
diff --git a/tests/qtest/qom-test.c b/tests/qtest/qom-test.c
index cf4c6b5add5..4ee95af6d94 100644
--- a/tests/qtest/qom-test.c
+++ b/tests/qtest/qom-test.c
@@ -200,13 +200,32 @@ static void test_machine(gconstpointer data)
 
     if (g_test_slow()) {
         /* Make sure we can get the machine class properties: */
-        g_autofree char *qom_machine = g_strdup_printf("%s-machine", machine);
-
-        response = qtest_qmp(qts, "{ 'execute': 'qom-list-properties',"
-                                  "  'arguments': { 'typename': %s } }",
-                             qom_machine);
-        g_assert(response);
+        QList *list;
+        const QListEntry *p;
+        bool found = false;
+
+        response = qtest_qmp(qts, "{ 'execute': 'query-machines' }");
+        g_assert(!qdict_haskey(response, "error"));
+        list = qdict_get_qlist(response, "return");
+        g_assert(list);
+        for (p = qlist_first(list); p; p = qlist_next(p)) {
+            QDict *minfo = qobject_to(QDict, qlist_entry_obj(p));
+            QDict *props;
+
+            if (strcmp(qdict_get_str(minfo, "name"), machine)) {
+                continue;
+            }
+            props = qtest_qmp(qts, "{ 'execute': 'qom-list-properties',"
+                                   "  'arguments': { 'typename': %s } }",
+                              qdict_get_str(minfo, "typename"));
+            g_assert(!qdict_haskey(props, "error"));
+            g_assert(qdict_haskey(props, "return"));
+            qobject_unref(props);
+            found = true;
+            break;
+        }
         qobject_unref(response);
+        g_assert(found);
     }
 
     test_properties(qts, "/machine", true);
@@ -218,6 +237,39 @@ static void test_machine(gconstpointer data)
     qtest_quit(qts);
 }
 
+static void test_query_machines_typename(void)
+{
+    QTestState *qts;
+    QDict *response;
+    QList *list;
+    const QListEntry *p;
+    bool saw = false;
+
+    qts = qtest_init("-machine none");
+    response = qtest_qmp(qts, "{ 'execute': 'query-machines' }");
+    g_assert(!qdict_haskey(response, "error"));
+    list = qdict_get_qlist(response, "return");
+    g_assert(list);
+
+    for (p = qlist_first(list); p; p = qlist_next(p)) {
+        QDict *minfo = qobject_to(QDict, qlist_entry_obj(p));
+        const char *typename = qdict_get_str(minfo, "typename");
+        g_autoptr(QDict) props = NULL;
+
+        g_assert(g_str_has_suffix(typename, "-machine"));
+        props = qtest_qmp(qts, "{ 'execute': 'qom-list-properties',"
+                               "  'arguments': { 'typename': %s } }",
+                          typename);
+        g_assert(!qdict_haskey(props, "error"));
+        g_assert(qdict_haskey(props, "return"));
+        saw = true;
+    }
+
+    g_assert(saw);
+    qobject_unref(response);
+    qtest_quit(qts);
+}
+
 static void add_machine_test_case(const char *mname)
 {
     char *path;
@@ -250,6 +302,7 @@ int main(int argc, char **argv)
 
     qtest_cb_for_every_machine(add_machine_test_case, g_test_quick());
     qtest_add_func("qom/qom-qtests", test_qom_qtests);
+    qtest_add_func("qom/machine-typename", test_query_machines_typename);
 
     return g_test_run();
 }
-- 
2.52.0.windows.1

Re: [PATCH v2 9/9] qapi: return MachineInfo typename from query-machines

[Daniel P. Berrangé]

On Wed, Sep 23, 2026 at 05:55:32AM +0800, Yonggang Luo wrote:
> query-machines returned only the -M name, so management apps inferred
> the QOM type as that name plus "-machine". A prefixed type such as
> arm-virt-11.1-machine no longer matches -M virt-11.1. Return the QOM
> type in MachineInfo typename from object_class_get_name() in
> qmp_query_machines(). test_query_machines_typename checks that
> qom-list-properties accepts it.
> 
> Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
> ---
>  hw/core/machine-qmp-cmds.c |  1 +
>  qapi/machine.json          |  6 +++-
>  tests/qtest/qom-test.c     | 65 ++++++++++++++++++++++++++++++++++----
>  3 files changed, 65 insertions(+), 7 deletions(-)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
-- 
|: https://berrange.com       ~~        https://hachyderm.io/@berrange :|
|: https://libvirt.org          ~~          https://entangle-photo.org :|
|: https://pixelfed.art/berrange   ~~    https://fstop138.berrange.com :|

Re: [PATCH v2 9/9] qapi: return MachineInfo typename from query-machines

[marcandre.lureau]

On Wed, 23 Sep 2026 05:55:32 +0800, Yonggang Luo <luoyonggang@gmail.com> wrote:
> query-machines returned only the -M name, so management apps inferred
> the QOM type as that name plus "-machine". A prefixed type such as
> arm-virt-11.1-machine no longer matches -M virt-11.1. Return the QOM
> type in MachineInfo typename from object_class_get_name() in
> qmp_query_machines(). test_query_machines_typename checks that
> qom-list-properties accepts it.
> 
> [...]

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

-- 
Marc-André Lureau <marcandre.lureau@redhat.com>