From 51a837e908d6f4bbe94469a4a0edcb76348fe964 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Mon, 6 Nov 2017 19:39:21 +0100
Subject: [PATCH] tpm-tis: check that at most one TPM device exists
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
---
hw/tpm/tpm_tis.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index 0a23203e756..db101b61d48 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -1061,6 +1061,11 @@ static void tpm_tis_realizefn(DeviceState *dev, Error **errp)
{
TPMState *s = TPM(dev);
+ if (!tpm_find()) {
+ error_setg(errp, "at most one TPM device is permitted");
+ return;
+ }
+
s->be_driver = qemu_find_tpm_be(s->backend);
if (!s->be_driver) {
error_setg(errp, "backend driver with id %s could not be found",
--
GitLab