From: Atish Patra <atish.patra@linux.dev>
To: Ard Biesheuvel <ardb@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
Atish Patra <atish.patra@linux.dev>
Cc: linux-efi@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org, Atish Patra <atishp@meta.com>
Subject: [PATCH 0/2] riscv: Use EFI runtime services for poweroff and restart
Date: Mon, 15 Jun 2026 16:28:20 -0700 [thread overview]
Message-ID: <20260615-efi_reset_shutdown-v1-0-9414edcbbab0@meta.com> (raw)
Today RISC-V always uses the SBI SRST extension for both poweroff and restart,
even when UEFI runtime services are available. This series makes RISC-V prefer
EFI runtime services for both paths when available. The reset via EFI is
required for EFI capsule updates and also documented as a preferred method
in BRS 1.0 spec (e.g. URT_030)[1]
Behavior on SBI-only (non-EFI) systems is unchanged.
Tested under QEMU 'virt' with EDK2/UEFI firmware exposing runtime
ResetSystem().
[1] https://docs.riscv.org/reference/brs/uefi.html#uefi
Signed-off-by: Atish Patra <atishp@meta.com>
---
Atish Patra (2):
riscv: efi: Power off via EFI runtime services when available
riscv: Restart via EFI runtime services when available
arch/riscv/kernel/efi.c | 5 +++++
arch/riscv/kernel/reset.c | 7 +++++++
2 files changed, 12 insertions(+)
---
base-commit: 8cd9520d35a6c38db6567e97dd93b1f11f185dc6
change-id: 20260615-efi_reset_shutdown-792040a83f18
Best regards,
--
Atish Patra <atishp@meta.com>
next reply other threads:[~2026-06-15 23:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-15 23:28 Atish Patra [this message]
2026-06-15 23:28 ` [PATCH 1/2] riscv: efi: Power off via EFI runtime services when available Atish Patra
2026-06-16 4:29 ` Sunil V L
2026-06-15 23:28 ` [PATCH 2/2] riscv: Restart " Atish Patra
2026-06-16 4:29 ` Sunil V L
2026-06-25 20:14 ` [PATCH 0/2] riscv: Use EFI runtime services for poweroff and restart Paul Walmsley
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