linux-kernel - [PATCH v2 0/2] efi: Fixes for EFI_MEMORY

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Date: Fri,  2 Feb 2024 10:07:02 -0800
From: Andrew Bresticker <abrestic@...osinc.com>
To: Ard Biesheuvel <ardb@...nel.org>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	linux-efi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	Andrew Bresticker <abrestic@...osinc.com>
Subject: [PATCH v2 0/2] efi: Fixes for EFI_MEMORY_SP memory on RISC-V and ARM64

Two small fixes to enable the use soft-reserved/special-purpose memory
(EFI_MEMORY_SP) with dax_kmem on RISC-V (and ARM64, I think, though I
don't have a platform to test it on).

Patch 1 fixes a trivial integer narrowing bug. Patch 2 prevents adding
memblocks for soft-reserved memory so that it can later be hotplugged by
dax_kmem.

Tested on a RISC-V platform that presents a range of EFI_MEMORY_SP with
Bjorn's MEMORY_HOTPLUG series[0] applied.

[0]: https://lore.kernel.org/lkml/20230512145737.985671-1-bjorn@kernel.org/

v1->v2: address comments from Ard

Andrew Bresticker (2):
  efi: runtime: Fix potential overflow of soft-reserved region size
  efi: Don't add memblocks for soft-reserved memory

 drivers/firmware/efi/arm-runtime.c   |  2 +-
 drivers/firmware/efi/efi-init.c      | 19 ++++++++++---------
 drivers/firmware/efi/riscv-runtime.c |  2 +-
 3 files changed, 12 insertions(+), 11 deletions(-)

-- 
2.34.1