arm: Provide common PSCI based reset handler
Most armv8 systems have PSCI support enabled in EL3, either through
ARM Trusted Firmware or other firmware.
On these systems, we do not need to implement system reset manually,
but can instead rely on higher level firmware to deal with it.
The exclude list seems excessive right now, but NXP is working on
providing an in-tree PSCI implementation, so that all NXP systems
can eventually use PSCI as well.
Signed-off-by: Alexander Graf <agraf@suse.de>
[agraf: fix meson]
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv8/Kconfig b/arch/arm/cpu/armv8/Kconfig
index 7e1fc4c..cd2d9bb 100644
--- a/arch/arm/cpu/armv8/Kconfig
+++ b/arch/arm/cpu/armv8/Kconfig
@@ -21,4 +21,22 @@
- Reserve the code for the spin-table and the release address
via a /memreserve/ region in the Device Tree.
+config PSCI_RESET
+ bool "Use PSCI for reset and shutdown"
+ default y
+ depends on !ARCH_EXYNOS7 && !ARCH_BCM283X && !TARGET_LS2080A_EMU && \
+ !TARGET_LS2080A_SIMU && !TARGET_LS2080AQDS && \
+ !TARGET_LS2080ARDB && !TARGET_LS1012AQDS && \
+ !TARGET_LS1012ARDB && !TARGET_LS1012AFRDM && \
+ !TARGET_LS1043ARDB && !ARCH_UNIPHIER && !ARCH_SNAPDRAGON && \
+ !TARGET_S32V234EVB
+ help
+ Most armv8 systems have PSCI support enabled in EL3, either through
+ ARM Trusted Firmware or other firmware.
+
+ On these systems, we do not need to implement system reset manually,
+ but can instead rely on higher level firmware to deal with it.
+
+ Select Y here to make use of PSCI calls for system reset
+
endif