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authorMichael Niewöhner <foss@mniewoehner.de>2020-03-03 20:48:30 +0100
committerPatrick Georgi <pgeorgi@google.com>2020-03-11 15:36:31 +0000
commitccde6be13a64f369da61c70be0221d0bc24f0fe2 (patch)
tree8ba79724852f034f0c41221e11be7e2b76f493e5
parent5f26d8cb4ad17570a60f449022574d819f39d6c2 (diff)
downloadcoreboot-ccde6be13a64f369da61c70be0221d0bc24f0fe2.tar.xz
soc/intel/common/block/smm: add case intrusion to SMI handler
This adds case intrusion detection to the SMI handler. At this point one can add the code to be executed when the INTRUDER signal gets asserted (iow: when the case is opened). Examples: - issue a warning - trigger an NMI - call poweroff() - ... Tested on X11SSM-F. Change-Id: Ifad675bb09215ada760efebdcd915958febf5778 Signed-off-by: Michael Niewöhner <foss@mniewoehner.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39265 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
-rw-r--r--src/soc/intel/common/block/smm/smihandler.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/smm/smihandler.c b/src/soc/intel/common/block/smm/smihandler.c
index 54f4e41e50..12c538eb96 100644
--- a/src/soc/intel/common/block/smm/smihandler.c
+++ b/src/soc/intel/common/block/smm/smihandler.c
@@ -28,6 +28,7 @@
#include <intelblocks/fast_spi.h>
#include <intelblocks/pmclib.h>
#include <intelblocks/smihandler.h>
+#include <intelblocks/tco.h>
#include <intelblocks/uart.h>
#include <smmstore.h>
#include <soc/nvs.h>
@@ -453,6 +454,14 @@ void smihandler_southbridge_tco(
/* Handle TCO timeout */
printk(BIOS_DEBUG, "TCO Timeout.\n");
}
+
+ if (tco_sts & (TCO_INTRD_DET << 16)) { /* INTRUDER# assertion */
+ /*
+ * Handle intrusion event
+ * If we ever get here, probably the case has been opened.
+ */
+ printk(BIOS_CRIT, "Case intrusion detected.\n");
+ }
}
void smihandler_southbridge_periodic(