When resuming after a migration, the backend sends CMD_INIT to the
emulator from the startup callback, then it sends the migration state
from the vmstate to the emulator, then it sends CMD_INIT again. Skip the
first CMD_INIT during a migration to avoid initializing the TPM twice.
Signed-off-by: Ross Lagerwall <ross.lagerw...@citrix.com>
---
backends/tpm/tpm_emulator.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/backends/tpm/tpm_emulator.c b/backends/tpm/tpm_emulator.c
index 87d061e9bb..9b50c5b3e2 100644
--- a/backends/tpm/tpm_emulator.c
+++ b/backends/tpm/tpm_emulator.c
@@ -32,6 +32,7 @@
#include "qemu/sockets.h"
#include "qemu/lockable.h"
#include "io/channel-socket.h"
+#include "sysemu/runstate.h"
#include "sysemu/tpm_backend.h"
#include "sysemu/tpm_util.h"
#include "tpm_int.h"
@@ -383,6 +384,15 @@ err_exit:
static int tpm_emulator_startup_tpm(TPMBackend *tb, size_t buffersize)
{
+ /* TPM startup will be done from post_load hook */
+ if (runstate_check(RUN_STATE_INMIGRATE)) {
+ if (buffersize != 0) {
+ return tpm_emulator_set_buffer_size(tb, buffersize, NULL);
+ }
+
+ return 0;
+ }
+
return tpm_emulator_startup_tpm_resume(tb, buffersize, false);
}
--
2.31.1
