[boot-wrapper v4 0/4] Add Armv8-R AArch64 support
Luca Fancellu
luca.fancellu at arm.com
Thu Oct 17 02:55:16 PDT 2024
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.
This work took inspiration from a serie already present upstream [1].
[1] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20210525062509.201464-1-jaxson.han@arm.com/
Changes from v3:
- rebase on current master
- detailed changes on each patch
Changes from v2:
- Now this work is based on this serie:
https://patchwork.kernel.org/project/linux-arm-kernel/cover/20240729161501.1806271-1-mark.rutland@arm.com/
Given the major rework, dropped every R-by.
Changes from v1:
- Dropped patch 4 regarding GIC changes, it's not needed anymore.
Luca Fancellu (4):
Introduce --with-bw-arch for boot-wrapper compile arch
aarch64: Enable Armv8-R EL2 boot
aarch64: Implement PSCI for Armv8-R
aarch64: Start Xen on Armv8-R at EL2
Makefile.am | 7 ++-
arch/aarch64/boot.S | 5 ++
arch/aarch64/include/asm/cpu.h | 24 ++++++++++
arch/aarch64/init.c | 83 ++++++++++++++++++++++++++++++++--
configure.ac | 20 ++++++--
5 files changed, 130 insertions(+), 9 deletions(-)
--
2.34.1
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