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soc/intel/common/block/smm: add case intrusion to SMI handler

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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>
This commit is contained in:
Michael Niewöhner 2020-03-03 20:48:30 +01:00 committed by Patrick Georgi
parent 5f26d8cb4a
commit ccde6be13a
1 changed files with 9 additions and 0 deletions
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9
src/soc/intel/common/block/smm/smihandler.c
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@ -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(