This series adds support for exiting Gunyah hypervisor and switching to EL2 during early boot on Qualcomm Dragonwing family platforms. This enables U-Boot to run at EL2, which is required for supporting hypervisors that need EL2 privilege level.
- Adds early boot0.h infrastructure to exit Gunyah via TrustZone SMC - Creates a reusable config fragment for easy platform enablement - Enables the feature on QCS9100 platform This series is based on the boot0.h infrastructure from: [1] https://lore.kernel.org/all/[email protected]/ Changes in v4: - Updated Kconfig and gunyah_exit_boot0.h header comments for better clarity on platform support - Split config changes into reusable fragment and qcs9100 platform enablement Link to v3: https://lore.kernel.org/u-boot/[email protected]/ Change in v3: - Corrected the logic to accurately detect the current Exception Level (EL) and fuction properly when U-Boot enters either EL2 or EL1. Link to v2: https://lore.kernel.org/u-boot/[email protected]/ Change in v2: - EL2 switch is made at early stage instead of doing at the very last stage in the previous version - This change is based on the patch [1] Link to v1: https://lore.kernel.org/u-boot/[email protected]/ Aswin Murugan (3): mach-snapdragon: Add early EL2 hypervisor switch support configs: qualcomm: Add Gunyah exit config fragment configs: qcom_qcs9100: Enable Gunyah exit support arch/arm/mach-snapdragon/Kconfig | 8 +++++ arch/arm/mach-snapdragon/include/mach/boot0.h | 3 ++ .../include/mach/gunyah_exit_boot0.h | 36 +++++++++++++++++++ board/qualcomm/exit-gunyah.config | 4 +++ configs/qcom_qcs9100_defconfig | 1 + 5 files changed, 52 insertions(+) create mode 100644 arch/arm/mach-snapdragon/include/mach/gunyah_exit_boot0.h create mode 100644 board/qualcomm/exit-gunyah.config -- 2.34.1
