risc-v/mpfs: add tamper detection support

This adds support for detecting various tamper events. The interrupt handler makes noise at every detection. Perhaps easiest test is to attach JTAG debugger. TAMPER_TESTS -define has some nonexisting (not in repos) calls, perhaps could remove it alltogether. Signed-off-by: Eero Nurkkala <[email protected]>
tiiuae · Nov 9, 2023 · 8d70256 · 8d70256
1 parent a18cb51
commit 8d70256
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diff --git a/arch/risc-v/src/mpfs/Kconfig b/arch/risc-v/src/mpfs/Kconfig
@@ -426,6 +426,12 @@ config MPFS_COREMMC_IRQNUM
 	range 0 63
 	depends on MPFS_COREMMC
 
+config MPFS_TAMPER
+	bool "Tamper detection"
+	default n
+	---help---
+		Enable tamper detection mechanisms.
+
 config MPFS_IHC_CLIENT
 	bool "IHC slave"
 	depends on RPTUN && !MPFS_BOOTLOADER

diff --git a/arch/risc-v/src/mpfs/Make.defs b/arch/risc-v/src/mpfs/Make.defs
@@ -112,6 +112,10 @@ ifeq ($(CONFIG_MPFS_CORESPI),y)
 CHIP_CSRCS += mpfs_corespi.c
 endif
 
+ifeq ($(CONFIG_MPFS_TAMPER),y)
+CHIP_CSRCS += mpfs_tamper.c
+endif
+
 ifeq ($(CONFIG_MPFS_CRYPTO),y)
 include mpfs/crypto.defs
 endif