u-boot/arch/arm/cpu
Heinrich Schuchardt 81ea00838c efi_loader: PSCI reset and shutdown
When an operating system started via bootefi tries to reset or power off
this is done by calling the EFI runtime ResetSystem(). On most ARMv8 system
the actual reset relies on PSCI. Depending on whether the PSCI firmware
resides the hypervisor (EL2) or in the secure monitor (EL3) either an HVC
or an SMC command has to be issued.

The current implementation always uses SMC. This results in crashes on
systems where the PSCI firmware is implemented in the hypervisor, e.g.
qemu-arm64_defconfig.

The logic to decide which call is needed based on the device tree is
already implemented in the PSCI firmware driver. During the EFI runtime
the device driver model is not available. But we can minimize code
duplication by merging the EFI runtime reset and poweroff code with
the PSCI firmware driver.

As the same HVC/SMC problem is also evident for the ARMv8 do_poweroff
and reset_misc routines let's move them into the same code module.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Tested-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2018-12-02 21:59:37 +01:00
..
arm11 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
arm720t SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
arm920t arm: remove prototype for get_timer_masked 2018-10-10 13:35:09 -04:00
arm926ejs arm: lpc32xx: remove phantom CONFIG_LPC32XX_SDRAM_ config option 2018-10-19 12:56:58 -04:00
arm946es SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
arm1136 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
arm1176 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
armv7 efi_loader: PSCI reset and shutdown 2018-12-02 21:59:37 +01:00
armv7m arm: armv7m: Clean up some thumb / compiler flag options 2018-05-23 13:03:42 -04:00
armv8 efi_loader: PSCI reset and shutdown 2018-12-02 21:59:37 +01:00
pxa SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
sa1100 arm: remove prototype for get_timer_masked 2018-10-10 13:35:09 -04:00
Makefile SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
u-boot-spl.lds SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
u-boot.lds ARM: Specify aligned address for secure section instead of using attributes 2018-09-07 09:11:42 -04:00