[v8,1/9] qdev: Add a granule_mode property

Commit Message

Eric Auger March 7, 2024, 1:43 p.m. UTC

Introduce a new enum type property allowing to set an
IOMMU granule. Values are 4k, 8k, 16k, 64k and host.
This latter indicates the vIOMMU granule will match
the host page size.

A subsequent patch will add such a property to the
virtio-iommu device.

Signed-off-by: Eric Auger <[e-mail]>
Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
Reviewed-by: Zhenzhong Duan <[e-mail]>

---
v5 -> v6
- remove #include "hw/virtio/virtio-iommu.h" (Zhenzhong)

v4 -> v5
- remove code that can be automatically generated
  and add the new enum in qapi/virtio.json (Philippe).
  Added Phild's SOB. low case needs to be used due to
  the Jason generation.

v3 -> v4:
- Add 8K
---
 qapi/virtio.json                    | 18 ++++++++++++++++++
 include/hw/qdev-properties-system.h |  3 +++
 hw/core/qdev-properties-system.c    | 14 ++++++++++++++
 3 files changed, 35 insertions(+)

Patch

diff --git a/qapi/virtio.json b/qapi/virtio.json
index a79013fe89..95745fdfd7 100644
--- a/qapi/virtio.json
+++ b/qapi/virtio.json
@@ -957,3 +957,21 @@ 
 
 { 'struct': 'DummyVirtioForceArrays',
   'data': { 'unused-iothread-vq-mapping': ['IOThreadVirtQueueMapping'] } }
+
+##
+# @GranuleMode:
+#
+# @4k: granule page size of 4KiB
+#
+# @8k: granule page size of 8KiB
+#
+# @16k: granule page size of 16KiB
+#
+# @64k: granule page size of 64KiB
+#
+# @host: granule matches the host page size
+#
+# Since: 9.0
+##
+{ 'enum': 'GranuleMode',
+  'data': [ '4k', '8k', '16k', '64k', 'host' ] }
diff --git a/include/hw/qdev-properties-system.h b/include/hw/qdev-properties-system.h
index 06c359c190..626be87dd3 100644
--- a/include/hw/qdev-properties-system.h
+++ b/include/hw/qdev-properties-system.h
@@ -8,6 +8,7 @@  extern const PropertyInfo qdev_prop_macaddr;
 extern const PropertyInfo qdev_prop_reserved_region;
 extern const PropertyInfo qdev_prop_multifd_compression;
 extern const PropertyInfo qdev_prop_mig_mode;
+extern const PropertyInfo qdev_prop_granule_mode;
 extern const PropertyInfo qdev_prop_losttickpolicy;
 extern const PropertyInfo qdev_prop_blockdev_on_error;
 extern const PropertyInfo qdev_prop_bios_chs_trans;
@@ -47,6 +48,8 @@  extern const PropertyInfo qdev_prop_iothread_vq_mapping_list;
 #define DEFINE_PROP_MIG_MODE(_n, _s, _f, _d) \
     DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_mig_mode, \
                        MigMode)
+#define DEFINE_PROP_GRANULE_MODE(_n, _s, _f, _d) \
+    DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_granule_mode, GranuleMode)
 #define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \
     DEFINE_PROP_SIGNED(_n, _s, _f, _d, qdev_prop_losttickpolicy, \
                         LostTickPolicy)
diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index 1a396521d5..b45e90edb2 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -679,6 +679,20 @@  const PropertyInfo qdev_prop_mig_mode = {
     .set_default_value = qdev_propinfo_set_default_value_enum,
 };
 
+/* --- GranuleMode --- */
+
+QEMU_BUILD_BUG_ON(sizeof(GranuleMode) != sizeof(int));
+
+const PropertyInfo qdev_prop_granule_mode = {
+    .name = "GranuleMode",
+    .description = "granule_mode values, "
+                   "4k, 8k, 16k, 64k, host",
+    .enum_table = &GranuleMode_lookup,
+    .get = qdev_propinfo_get_enum,
+    .set = qdev_propinfo_set_enum,
+    .set_default_value = qdev_propinfo_set_default_value_enum,
+};
+
 /* --- Reserved Region --- */
 
 /*