linux-kernel - [PATCH 0/3] Preparations for Linux on Apple Silicon

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Message-Id: <70D1FB71-240D-4FC4-81BC-0954062A4D11@caramail.com>
Date:   Wed, 20 Jan 2021 12:36:42 +0100
From:   Mohamed Mediouni <mohamed.mediouni@...amail.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Stan Skowronek <stan@...ellium.com>
Subject: [PATCH 0/3] Preparations for Linux on Apple Silicon

This patch series contains the changes to common Linux
kernel code that are required to boot Linux on Apple Silicon
Mac computers.

The changes:

- Support for FIQ interrupts in-kernel

This is required for the timer and IPIs on Apple SoCs.

- WFI hook

Apple processors do not keep register state across WFI.
As such, put a mechanism in cpu_ops to put a custom
sleep function instead.

- use nGnRnE instead of nGnRE on Apple processors

Device-nGnRE writes go to nowhere on Apple processors, as
such use MAIR to change those to Device-nGnRE writes.

Mohamed Mediouni (1):
  arm64: mm: use nGnRnE instead of nGnRE on Apple processors

Stan Skowronek (2):
  arm64/kernel: FIQ support
  arm64: kernel: Add a WFI hook.

 arch/arm64/include/asm/arch_gicv3.h |  2 +-
 arch/arm64/include/asm/assembler.h  |  8 ++--
 arch/arm64/include/asm/cpu_ops.h    |  2 +
 arch/arm64/include/asm/daifflags.h  |  4 +-
 arch/arm64/include/asm/irq.h        |  4 ++
 arch/arm64/include/asm/irqflags.h   |  6 +--
 arch/arm64/kernel/cpu_ops.c         |  6 +++
 arch/arm64/kernel/entry.S           | 74 ++++++++++++++++++++++++++---
 arch/arm64/kernel/irq.c             | 14 ++++++
 arch/arm64/kernel/process.c         | 13 +++--
 arch/arm64/mm/proc.S                | 26 ++++++++++
 11 files changed, 140 insertions(+), 19 deletions(-)

--
2.29.2