This commit adds further information in the FAQ about how to enable
error tracing on serial console.

Signed-off-by: Claudio Scordino <clau...@evidence.eu.com>
---
 FAQ.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/FAQ.md b/FAQ.md
index dcc5fbd..5d2cc05 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -57,6 +57,9 @@ If everything else fails, consider buying a PCI serial 
adapter. Now, attach
 a Linux machine to the other side of serial connection and use terminal 
emulator
 like minicom to grab the log messages.
 
+To enable error tracing, put ```#define CONFIG_TRACE_ERROR``` in file
+hypervisor/include/jailhouse/config.h before compiling.
+
 Please note Jailhouse developers may ask you for these logs, shall you come for
 help to jailhouse-dev mailing list, because they are extremely useful to 
analyze
 machine hangs. So please have the logs at hand, if possible.
-- 
2.7.4

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