[boot-wrapper PATCH 0/5] Add Armv8-R AArch64 support
From: Jaxson Han <hidden>
Date: 2021-04-20 07:27:25
Currently, we cannot boot Linux with boot-wrapper on Armv8-R AArch64: 1. The Armv8-R AArch64 profile does not support the EL3. 2. The Armv8-R AArch64 EL2 only supports a PMSA, which Linux does not support. So it's necessary to drop into EL1 before entering the kernel. 3. There is no EL2 booting code for Armv8-R AArch64 and no configuration for dropping to EL1 in boot-wrapper. These patches enable boot-wrapper booting Linux with Armv8-R AArch64: Patch 1 allows boot-wrapper to boot on more platforms. Patch 2 renames some labels as preparations for booting from lower EL. Patch 3 prepares for GICv3 initialization with EL2. Patch 4 adds necessary EL2 registers. Patch 5 adds auto-detection for Armv8-R AArch64 to drop into EL1 before entering the kernel. Refs: Arm Architecture Reference Manual Supplement - Armv8, for Armv8-R AArch64 architecture profile [https://developer.arm.com/documentation/ddi0600/latest/] Jaxson Han (5): Decouple V2M_SYS config by auto-detect dtb node aarch64: Rename labels and prepare for lower EL booting gic-v3: Prepare for gicv3 with EL2 aarch64: Prepare for booting with EL2 aarch64: Introduce EL2 boot code for Armv8-R AArch64 Makefile.am | 2 +- arch/aarch32/include/asm/gic-v3.h | 7 ++ arch/aarch64/boot.S | 105 ++++++++++++++++++++++++++---- arch/aarch64/include/asm/cpu.h | 3 + arch/aarch64/include/asm/gic-v3.h | 38 ++++++++++- arch/aarch64/psci.S | 13 ++-- arch/aarch64/spin.S | 8 +-- arch/aarch64/utils.S | 10 ++- gic-v3.c | 2 +- platform.c | 4 ++ 10 files changed, 162 insertions(+), 30 deletions(-) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel