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[Qemu-devel] [PATCH v4 2/2] tpm: extend TPM TIS with state migration sup
From: |
Stefan Berger |
Subject: |
[Qemu-devel] [PATCH v4 2/2] tpm: extend TPM TIS with state migration support |
Date: |
Thu, 1 Mar 2018 14:59:33 -0500 |
Extend the TPM TIS interface with state migration support.
We need to synchronize with the backend thread to make sure that a command
being processed by the external TPM emulator has completed and its
response been received.
Signed-off-by: Stefan Berger <address@hidden>
---
hw/tpm/tpm_tis.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 53 insertions(+), 1 deletion(-)
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index 834eef7..5016d28 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -902,9 +902,61 @@ static void tpm_tis_reset(DeviceState *dev)
tpm_backend_startup_tpm(s->be_driver, s->be_buffer_size);
}
+/* persistent state handling */
+
+static int tpm_tis_pre_save(void *opaque)
+{
+ TPMState *s = opaque;
+ uint8_t locty = s->active_locty;
+
+ DPRINTF("tpm_tis: suspend: locty = %d : rw_offset = %u\n",
+ locty, s->rw_offset);
+#ifdef DEBUG_TIS
+ tpm_tis_dump_state(opaque, 0);
+#endif
+
+ /*
+ * Synchronize with backend completion.
+ */
+ tpm_backend_finish_sync(s->be_driver);
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_locty = {
+ .name = "loc",
+ .version_id = 1,
+ .minimum_version_id = 0,
+ .minimum_version_id_old = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(state, TPMLocality),
+ VMSTATE_UINT32(inte, TPMLocality),
+ VMSTATE_UINT32(ints, TPMLocality),
+ VMSTATE_UINT8(access, TPMLocality),
+ VMSTATE_UINT32(sts, TPMLocality),
+ VMSTATE_UINT32(iface_id, TPMLocality),
+ VMSTATE_END_OF_LIST(),
+ }
+};
+
static const VMStateDescription vmstate_tpm_tis = {
.name = "tpm",
- .unmigratable = 1,
+ .version_id = 1,
+ .minimum_version_id = 0,
+ .minimum_version_id_old = 0,
+ .pre_save = tpm_tis_pre_save,
+ .fields = (VMStateField[]) {
+ VMSTATE_BUFFER(buffer, TPMState),
+ VMSTATE_UINT16(rw_offset, TPMState),
+ VMSTATE_UINT8(active_locty, TPMState),
+ VMSTATE_UINT8(aborting_locty, TPMState),
+ VMSTATE_UINT8(next_locty, TPMState),
+
+ VMSTATE_STRUCT_ARRAY(loc, TPMState, TPM_TIS_NUM_LOCALITIES, 1,
+ vmstate_locty, TPMLocality),
+
+ VMSTATE_END_OF_LIST()
+ }
};
static Property tpm_tis_properties[] = {
--
2.5.5
Re: [Qemu-devel] [PATCH v4 1/2] tpm: extend TPM emulator with state migration support, Marc-André Lureau, 2018/03/28
[Qemu-devel] [PATCH v4 2/2] tpm: extend TPM TIS with state migration support,
Stefan Berger <=
Re: [Qemu-devel] [PATCH v4 0/2] tpm: Extend TPM with state migration support, Stefan Berger, 2018/03/01