From: Ross Lagerwall <ross.lagerwall@citrix.com>

When the guest writes to the RTC, the write is intercepted and emulated
by Xen and the time difference is broadcasted as a TIMEOFFSET ioreq.
Emit an RTC_CHANGE QMP event when this happens rather than ignoring it
so that something can make use of the information (e.g. the toolstack
can persist it between VM starts).

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Message-ID: <20260108135406.1879210-1-ross.lagerwall@citrix.com>
Acked-by: Anthony PERARD <anthony.perard@vates.tech>
Signed-off-by: Anthony PERARD <anthony.perard@vates.tech>
---
 hw/xen/xen-hvm-common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/xen/xen-hvm-common.c b/hw/xen/xen-hvm-common.c
index 59c73dfaeb..b55d7f4a94 100644
--- a/hw/xen/xen-hvm-common.c
+++ b/hw/xen/xen-hvm-common.c
@@ -4,6 +4,7 @@
 #include "qemu/error-report.h"
 #include "qemu/target-info.h"
 #include "qapi/error.h"
+#include "qapi/qapi-events-misc.h"
 #include "exec/target_page.h"
 #include "trace.h"
 
@@ -471,6 +472,7 @@ static void handle_ioreq(XenIOState *state, ioreq_t *req)
             cpu_ioreq_move(req);
             break;
         case IOREQ_TYPE_TIMEOFFSET:
+            qapi_event_send_rtc_change((int64_t)req->data, "");
             break;
         case IOREQ_TYPE_INVALIDATE:
             xen_invalidate_map_cache();


--
Anthony Perard | Vates XCP-ng Developer

XCP-ng & Xen Orchestra - Vates solutions

web: https://vates.tech