From cd31310f657db0a4a96028383aa7ca4d2efdd903 Mon Sep 17 00:00:00 2001
From: Junjie Mao <junjie.mao@intel.com>
Date: Tue, 17 Aug 2021 16:22:46 +0800
Subject: [PATCH] FIXME: temporarily disable TPM2 passthrough

On some boards it is seen that the log area of the physical TPM2 is
programmed to be 0. If TPM2 is passed through to a pre-launched VM in such
cases, a piece of memory starting from GPA 0 will be unmapped from the
Service VM, leading to Service VM crash due to early BIOS corruption
checks.

This patch temporarily disables TPM2 passthrough on such platforms. A
thorough fix should be proposed later to gracefully handle such cases.

Tracked-On: #6288
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
---
 misc/config_tools/data/ehl-crb-b/hybrid_rt.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/misc/config_tools/data/ehl-crb-b/hybrid_rt.xml b/misc/config_tools/data/ehl-crb-b/hybrid_rt.xml
index ee3bcbe05..d7756af34 100644
--- a/misc/config_tools/data/ehl-crb-b/hybrid_rt.xml
+++ b/misc/config_tools/data/ehl-crb-b/hybrid_rt.xml
@@ -130,7 +130,7 @@
             <pci_dev>00:1d.2 Ethernet controller: Intel Corporation Device 4bb0</pci_dev>
         </pci_devs>
         <mmio_resources>
-            <TPM2>y</TPM2>
+            <TPM2>n</TPM2>
         </mmio_resources>
     </vm>
     <vm id="1">