[RFC PATCH v2 37/48] event: add event to notify lmb memory map changes
Sughosh Ganu
sughosh.ganu at linaro.org
Thu Jul 4 09:35:33 CEST 2024
Add an event which would be used for notifying changes in the
LMB modules' memory map. This is to be used for having a
synchronous view of the memory that is currently in use, and that is
available for allocations.
Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
---
Changes since V1:
* Remove the event for EFI notifications.
common/event.c | 2 ++
include/event.h | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/common/event.c b/common/event.c
index dda569d447..fc8002603c 100644
--- a/common/event.c
+++ b/common/event.c
@@ -48,6 +48,8 @@ const char *const type_name[] = {
/* main loop events */
"main_loop",
+
+ "lmb_map_update",
};
_Static_assert(ARRAY_SIZE(type_name) == EVT_COUNT, "event type_name size");
diff --git a/include/event.h b/include/event.h
index fb353ad623..fce7e96170 100644
--- a/include/event.h
+++ b/include/event.h
@@ -153,6 +153,14 @@ enum event_t {
*/
EVT_MAIN_LOOP,
+ /**
+ * @EVT_LMB_MAP_UPDATE:
+ * This event is triggered on an update to the LMB reserved memory
+ * region. This can be used to notify about any LMB memory allocation
+ * or freeing of memory having occurred.
+ */
+ EVT_LMB_MAP_UPDATE,
+
/**
* @EVT_COUNT:
* This constants holds the maximum event number + 1 and is used when
@@ -203,6 +211,12 @@ union event_data {
oftree tree;
struct bootm_headers *images;
} ft_fixup;
+
+ struct event_lmb_map_update {
+ u64 base;
+ u64 size;
+ u8 op;
+ } lmb_map;
};
/**
--
2.34.1
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