linux-kernel - [PATCH 0/3] riscv: sbi: Switch to the sys-off handler API

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Date:   Wed, 28 Dec 2022 10:19:12 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Palmer Dabbelt <palmer@...belt.com>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Cc:     Samuel Holland <samuel@...lland.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <apatel@...tanamicro.com>,
        Atish Patra <atishp@...osinc.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Petr Mladek <pmladek@...e.com>,
        YueHaibing <yuehaibing@...wei.com>, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, tangmeng <tangmeng@...ontech.com>
Subject: [PATCH 0/3] riscv: sbi: Switch to the sys-off handler API

I want to convert the axp20x PMIC poweroff handler to use the sys-off
API, so it can be used as a fallback for if the SBI poweroff handler
is unavailable. But the SBI poweroff handler still uses pm_power_off, so
done alone, this would cause the axp20x callback to be called first,
before the SBI poweroff handler has a chance to run.

In order to prevent this change in behavior, the SBI poweroff handler
needs to be converted to the sys-off API first, at a higher priority.

This series performs the conversion, after accounting for the fact that
the SBI poweroff handler is registered quite early during boot.

The first patch is a dependency for both this series and the PSCI
series[1], so I would like to get at least patch 1 merged soon.

[1]: https://lore.kernel.org/lkml/20221105214841.7828-1-samuel@sholland.org/

Samuel Holland (3):
  kernel/reboot: Use the static sys-off handler for any priority
  riscv: sbi: Share the code for unsupported extension warnings
  riscv: sbi: Switch to the sys-off handler API

 arch/riscv/include/asm/sbi.h |  1 -
 arch/riscv/kernel/sbi.c      | 63 +++++++++++++++++++++---------------
 kernel/reboot.c              | 10 +++---
 3 files changed, 41 insertions(+), 33 deletions(-)

-- 
2.37.4