| From: |
| Luca Fancellu <luca.fancellu-AT-arm.com> |
| To: |
| mark.rutland-AT-arm.com, andre.przywara-AT-arm.com |
| Subject: |
| [boot-wrapper v3 0/4] Add Armv8-R AArch64 support |
| Date: |
| Wed, 31 Jul 2024 15:10:59 +0100 |
| Message-ID: |
| <20240731141103.2559706-1-luca.fancellu@arm.com> |
| Cc: |
| linux-arm-kernel-AT-lists.infradead.org |
| Archive-link: |
| Article |
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/cov...
Changes from v2:
- Now this work is based on this serie:
https://patchwork.kernel.org/project/linux-arm-kernel/cov...
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 | 69 ++++++++++++++++++++++++++++++++--
configure.ac | 20 ++++++++--
5 files changed, 118 insertions(+), 7 deletions(-)
--
2.34.1
