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From: Jaxson Han <jaxson.han@arm.com>
To: mark.rutland@arm.com, andre.przywara@arm.com
Cc: linux-arm-kernel@lists.infradead.org, wei.chen@arm.com,
	jaxson.han@arm.com
Subject: [boot-wrapper PATCH v2 0/8] Add Armv8-R AArch64 support
Date: Fri, 21 May 2021 18:47:59 +0800	[thread overview]
Message-ID: <20210521104807.138269-1-jaxson.han@arm.com> (raw)

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 remove the redundant setup_stack.
Patch 4-5 does some preparations for lower EL booting.
Patch 6 prepares for GICv3 initialization with EL2.
Patch 7 adds necessary EL2 registers.
Patch 8 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/]

---------
v1 -> v2:
1. Split Patch 2 to Patch 2,3,4.
2. Slightly refine some comments.
3. More checks on Armv8-R AArch64.
4. Force setting HCR_EL2 instead of modifying.

Jaxson Han (8):
  Decouple V2M_SYS config by auto-detect dtb node
  aarch64: Rename labels and prepare for lower EL booting
  aarch64: Remove the redundant setup_stack
  aarch64: Prepare for EL1 booting
  aarch64: 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                       |   4 +-
 arch/aarch32/include/asm/gic-v3.h |   7 ++
 arch/aarch64/boot.S               | 146 +++++++++++++++++++++++++++---
 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, 203 insertions(+), 32 deletions(-)

-- 
2.25.1


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             reply	other threads:[~2021-05-21 10:51 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21 10:47 Jaxson Han [this message]
2021-05-21 10:48 ` [boot-wrapper PATCH v2 1/8] Decouple V2M_SYS config by auto-detect dtb node Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 2/8] aarch64: Rename labels and prepare for lower EL booting Jaxson Han
2021-05-24  9:32   ` Andre Przywara
2021-05-25  1:54     ` Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 3/8] aarch64: Remove the redundant setup_stack Jaxson Han
2021-05-24  9:32   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 4/8] aarch64: Prepare for EL1 booting Jaxson Han
2021-05-24  9:32   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 5/8] aarch64: Prepare for lower EL booting Jaxson Han
2021-05-24  9:33   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 6/8] gic-v3: Prepare for gicv3 with EL2 Jaxson Han
2021-05-24  9:33   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 7/8] aarch64: Prepare for booting " Jaxson Han
2021-05-24  9:33   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 8/8] aarch64: Introduce EL2 boot code for Armv8-R AArch64 Jaxson Han
2021-05-24 10:19   ` Andre Przywara
2021-05-25  1:59     ` Jaxson Han

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