[boot-wrapper PATCH 0/5] Add Armv8-R AArch64 support
Jaxson Han
jaxson.han at arm.com
Tue Apr 20 08:24:33 BST 2021
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
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