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[Qemu-devel] [PATCH v2 3/7] tpm: implement tpm_backend_wait_cmd_complete
From: |
Stefan Berger |
Subject: |
[Qemu-devel] [PATCH v2 3/7] tpm: implement tpm_backend_wait_cmd_completed |
Date: |
Fri, 27 Oct 2017 19:02:37 -0400 |
Implement tpm_backend_wait_cmd_completed to synchronize with the
backend (thread) for the completion of a command.
Signed-off-by: Stefan Berger <address@hidden>
---
backends/tpm.c | 10 ++++++++++
include/sysemu/tpm_backend.h | 8 ++++++++
2 files changed, 18 insertions(+)
diff --git a/backends/tpm.c b/backends/tpm.c
index 2f60166..6e26832 100644
--- a/backends/tpm.c
+++ b/backends/tpm.c
@@ -28,6 +28,16 @@ void tpm_backend_cmd_completed(TPMBackend *s)
qemu_mutex_unlock(&s->state_lock);
}
+void tpm_backend_wait_cmd_completed(TPMBackend *s)
+{
+ qemu_mutex_lock(&s->state_lock);
+
+ if (s->tpm_busy) {
+ qemu_cond_wait(&s->cmd_complete, &s->state_lock);
+ }
+ qemu_mutex_unlock(&s->state_lock);
+}
+
static void tpm_backend_request_completed_bh(void *opaque)
{
TPMBackend *s = TPM_BACKEND(opaque);
diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h
index e08c51d..8c271f4 100644
--- a/include/sysemu/tpm_backend.h
+++ b/include/sysemu/tpm_backend.h
@@ -207,6 +207,14 @@ TPMInfo *tpm_backend_query_tpm(TPMBackend *s);
*/
void tpm_backend_cmd_completed(TPMBackend *s);
+/**
+ * tpm_backend_wait_cmd_completed:
+ * @s: the backend
+ *
+ * Wait the backend to not be busy anymore
+ */
+void tpm_backend_wait_cmd_completed(TPMBackend *s);
+
TPMBackend *qemu_find_tpm_be(const char *id);
void tpm_register_model(enum TpmModel model);
--
2.5.5
- [Qemu-devel] [PATCH v2 0/7] tpm: Extend TPM with state migration support, Stefan Berger, 2017/10/27
- [Qemu-devel] [PATCH v2 1/7] tpm: Introduce condition to notify waiters of completed command, Stefan Berger, 2017/10/27
- [Qemu-devel] [PATCH v2 4/7] tpm: Implement tpm_sized_buffer_reset, Stefan Berger, 2017/10/27
- [Qemu-devel] [PATCH v2 2/7] tpm: Introduce condition in TPM backend for notification, Stefan Berger, 2017/10/27
- [Qemu-devel] [PATCH v2 7/7] tpm: extend TPM CRB with state migration support, Stefan Berger, 2017/10/27
- [Qemu-devel] [PATCH v2 3/7] tpm: implement tpm_backend_wait_cmd_completed,
Stefan Berger <=
- [Qemu-devel] [PATCH v2 5/7] tpm: extend TPM emulator with state migration support, Stefan Berger, 2017/10/27
- [Qemu-devel] [PATCH v2 6/7] tpm: extend TPM TIS with state migration support, Stefan Berger, 2017/10/27