From ad4ddfcfdbf634d2ba4746d92cfd11854f87417a Mon Sep 17 00:00:00 2001
From: Patrick Rudolph <patrick.rudolph@9elements.com>
Date: Fri, 2 Feb 2018 15:07:09 +0100
Subject: util/intelmetool: Add additional helpful error messages

Add more verbose error message for common problems on modern
operating systems, like Secure Boot and CONFIG_STRICT_DEVMEM.

Change-Id: Ie3361910d48271bcc2cd3b4b74937fbc5df0a176
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/25401
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
---
 util/intelmetool/intelmetool.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'util/intelmetool/intelmetool.c')

diff --git a/util/intelmetool/intelmetool.c b/util/intelmetool/intelmetool.c
index ae36fc58fc..5981e9ddbd 100644
--- a/util/intelmetool/intelmetool.c
+++ b/util/intelmetool/intelmetool.c
@@ -491,7 +491,8 @@ int main(int argc, char *argv[])
 	#ifndef __DARWIN__
 		fd_mem = open("/dev/mem", O_RDWR);
 		if (fd_mem < 0) {
-			perror("Can not open /dev/mem");
+			perror("Can not open /dev/mem. Do you have disabled "
+			       "Secure Boot ?");
 			exit(1);
 		}
 
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