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[Qemu-devel] [PATCH v2 06/10] replay: vmstate for replay module
From: |
Pavel Dovgalyuk |
Subject: |
[Qemu-devel] [PATCH v2 06/10] replay: vmstate for replay module |
Date: |
Thu, 15 Sep 2016 12:01:16 +0300 |
User-agent: |
StGit/0.16 |
This patch introduces vmstate for replay data structures.
It allows saving and loading vmstate while replaying.
Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
include/sysemu/replay.h | 4 ++++
replay/replay-internal.h | 2 ++
replay/replay-snapshot.c | 40 ++++++++++++++++++++++++++++++++++++++++
vl.c | 1 +
4 files changed, 47 insertions(+)
diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h
index aa378ce..1123fc2 100644
--- a/include/sysemu/replay.h
+++ b/include/sysemu/replay.h
@@ -147,6 +147,10 @@ void replay_net_packet_event(ReplayNetState *rns, unsigned
flags,
/* VM state operations */
+/* Registers replay VMState.
+ Should be called before virtual devices initialization
+ to make cached timers available for post_load functions. */
+void replay_vmstate_register(void);
/*! Called at the start of execution.
Loads or saves initial vmstate depending on execution mode. */
void replay_vmstate_init(void);
diff --git a/replay/replay-internal.h b/replay/replay-internal.h
index 3147d66..9bc4a29 100644
--- a/replay/replay-internal.h
+++ b/replay/replay-internal.h
@@ -67,6 +67,8 @@ typedef struct ReplayState {
unsigned int data_kind;
/*! Flag which indicates that event is not processed yet. */
unsigned int has_unread_data;
+ /*! Temporary variable for saving current log offset. */
+ uint64_t file_offset;
} ReplayState;
extern ReplayState replay_state;
diff --git a/replay/replay-snapshot.c b/replay/replay-snapshot.c
index a48c6fc..4933bdd 100644
--- a/replay/replay-snapshot.c
+++ b/replay/replay-snapshot.c
@@ -17,6 +17,46 @@
#include "sysemu/sysemu.h"
#include "monitor/monitor.h"
#include "qapi/qmp/qstring.h"
+#include "migration/vmstate.h"
+
+static void replay_pre_save(void *opaque)
+{
+ ReplayState *state = opaque;
+ state->file_offset = ftello64(replay_file);
+}
+
+static int replay_post_load(void *opaque, int version_id)
+{
+ ReplayState *state = opaque;
+ fseeko64(replay_file, state->file_offset, SEEK_SET);
+ /* If this was a vmstate, saved in recording mode,
+ we need to initialize replay data fields. */
+ replay_fetch_data_kind();
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_replay = {
+ .name = "replay",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .pre_save = replay_pre_save,
+ .post_load = replay_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT64_ARRAY(cached_clock, ReplayState, REPLAY_CLOCK_COUNT),
+ VMSTATE_UINT64(current_step, ReplayState),
+ VMSTATE_INT32(instructions_count, ReplayState),
+ VMSTATE_UINT32(data_kind, ReplayState),
+ VMSTATE_UINT32(has_unread_data, ReplayState),
+ VMSTATE_UINT64(file_offset, ReplayState),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+void replay_vmstate_register(void)
+{
+ vmstate_register(NULL, 0, &vmstate_replay, &replay_state);
+}
void replay_vmstate_init(void)
{
diff --git a/vl.c b/vl.c
index 6698d88..f2193cb 100644
--- a/vl.c
+++ b/vl.c
@@ -4361,6 +4361,7 @@ int main(int argc, char **argv, char **envp)
configure_icount(icount_opts, &error_abort);
qemu_opts_del(icount_opts);
}
+ replay_vmstate_register();
if (default_net) {
QemuOptsList *net = qemu_find_opts("net");
- [Qemu-devel] [PATCH v2 01/10] record/replay: add network support, (continued)
- [Qemu-devel] [PATCH v2 01/10] record/replay: add network support, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 02/10] block: set snapshot option for block devices in blkreplay module, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 04/10] replay: save/load initial state, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 05/10] replay: move internal data to the structure, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 06/10] replay: vmstate for replay module,
Pavel Dovgalyuk <=
- [Qemu-devel] [PATCH v2 07/10] replay: allow replay stopping and restarting, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 09/10] pcspk: adding vmstate for save/restore, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 08/10] kvmvapic: fix state change handler, Pavel Dovgalyuk, 2016/09/15
- [Qemu-devel] [PATCH v2 10/10] integratorcp: adding vmstate for save/restore, Pavel Dovgalyuk, 2016/09/15
- Re: [Qemu-devel] [PATCH v2 00/10] replay additions, Paolo Bonzini, 2016/09/15