[PATCH BlueZ v1 03/10] emulator: Answer the time of a guest with a skew

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

With a skew, the current time of the calendar may be ahead of a guest,
so answering it as the time of an interrupt moves the guest past the
events it requested, which then run in its past and make it panic as
time goes backwards.

Answer the time of the guest itself instead.

Fixes: d7ef45305b15 ("emulator: Add time travel calendar to btvirt")
Assisted-by: Claude:claude-opus-5-5
---
 emulator/timetravel.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/emulator/timetravel.c b/emulator/timetravel.c
index c1938ed23bdc..be70acd3c10d 100644
--- a/emulator/timetravel.c
+++ b/emulator/timetravel.c
@@ -461,8 +461,14 @@ static void handle_msg(struct tt_client *client, struct tt_msg *msg)
 		break;
 	case TT_GET:
 		/* The guest takes it as the time of an interrupt: the current
-		 * time, which no guest is ahead of.
+		 * time, which no guest is ahead of in lock-step. With a skew,
+		 * other guests may be ahead of this one, which must stay at
+		 * its own time to run the events it requested.
 		 */
+		if (tt.skew) {
+			send_msg(client, TT_ACK, msg->seq, client->time);
+			return;
+		}
 		client->time = MAX(client->time, tt.now);
 		send_msg(client, TT_ACK, msg->seq, client->time);
 		return;
-- 
2.56.0