hw/i3c: Add hotplug support
This adds support for hotplugging in I3C. Conceptually this can be thought of as an I3C target being physically socketed onto a board. It is then the target's responsibility to go through the hot-join and DAA process so it can participate on the bus. Signed-off-by: Joe Komlodi <komlodi@google.com> Reviewed-by: Patrick Venture <venture@google.com> Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com> Tested-by: Jithu Joseph <jithu.joseph@oss.qualcomm.com> Link: https://lore.kernel.org/qemu-devel/20260225021158.1586584-21-jamin_lin@aspeedtech.com Signed-off-by: Cédric Le Goater <clg@redhat.com>
Jamin Lin committed
Feb 25, 2026 at 02:12 UTC
071d587645d13e54a966d3d6ef655cbf041a8a8b
1 file changed
+17
hw/i3c/core.c
+17
@@ -11,6 +11,7 @@
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#include "qapi/error.h"
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#include "trace.h"
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#include "hw/i3c/i3c.h"
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+#include "hw/core/hotplug.h"
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#include "hw/core/qdev-properties.h"
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/*
@@ -26,6 +27,17 @@ static const Property i3c_props[] = {
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DEFINE_PROP_UINT64("pid", struct I3CTarget, pid, 0),
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};
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+static void i3c_realize(BusState *bus, Error **errp)
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+{
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+ qbus_set_bus_hotplug_handler(bus);
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+}
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+
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+static void i3c_class_init(ObjectClass *klass, const void *data)
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+{
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+ BusClass *k = BUS_CLASS(klass);
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+ k->realize = i3c_realize;
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+}
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+
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I3CBus *i3c_init_bus(DeviceState *parent, const char *name)
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{
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return i3c_init_bus_type(TYPE_I3C_BUS, parent, name);
@@ -633,6 +645,11 @@ static const TypeInfo i3c_types[] = {
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.parent = TYPE_BUS,
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.instance_size = sizeof(I3CBus),
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.class_size = sizeof(I3CBusClass),
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+ .class_init = i3c_class_init,
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+ .interfaces = (InterfaceInfo[]) {
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+ { TYPE_HOTPLUG_HANDLER },
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+ { }
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+ }
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},
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{
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.name = TYPE_I3C_TARGET,