From 7966d70f6f6b188475e67c2c363f19eec3d28c96 Mon Sep 17 00:00:00 2001 From: Jason A. Donenfeld Date: Tue, 25 Oct 2022 02:43:17 +0200 Subject: reset: allow registering handlers that aren't called by snapshot loading Snapshot loading only expects to call deterministic handlers, not non-deterministic ones. So introduce a way of registering handlers that won't be called when reseting for snapshots. Signed-off-by: Jason A. Donenfeld Message-id: 20221025004327.568476-2-Jason@zx2c4.com [PMM: updated json doc comment with Markus' text; fixed checkpatch style nit] Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- hw/core/reset.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'hw/core/reset.c') diff --git a/hw/core/reset.c b/hw/core/reset.c index 36be82c491..d3263b613e 100644 --- a/hw/core/reset.c +++ b/hw/core/reset.c @@ -33,6 +33,7 @@ typedef struct QEMUResetEntry { QTAILQ_ENTRY(QEMUResetEntry) entry; QEMUResetHandler *func; void *opaque; + bool skip_on_snapshot_load; } QEMUResetEntry; static QTAILQ_HEAD(, QEMUResetEntry) reset_handlers = @@ -47,6 +48,16 @@ void qemu_register_reset(QEMUResetHandler *func, void *opaque) QTAILQ_INSERT_TAIL(&reset_handlers, re, entry); } +void qemu_register_reset_nosnapshotload(QEMUResetHandler *func, void *opaque) +{ + QEMUResetEntry *re = g_new0(QEMUResetEntry, 1); + + re->func = func; + re->opaque = opaque; + re->skip_on_snapshot_load = true; + QTAILQ_INSERT_TAIL(&reset_handlers, re, entry); +} + void qemu_unregister_reset(QEMUResetHandler *func, void *opaque) { QEMUResetEntry *re; @@ -60,12 +71,16 @@ void qemu_unregister_reset(QEMUResetHandler *func, void *opaque) } } -void qemu_devices_reset(void) +void qemu_devices_reset(ShutdownCause reason) { QEMUResetEntry *re, *nre; /* reset all devices */ QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) { + if (reason == SHUTDOWN_CAUSE_SNAPSHOT_LOAD && + re->skip_on_snapshot_load) { + continue; + } re->func(re->opaque); } } -- cgit v1.2.3-55-g7522