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

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Date: Tue, 06 Feb 2024 17:04:32 -0800 (PST)
From: Palmer Dabbelt <palmer@...belt.com>
To: Ard Biesheuvel <ardb@...nel.org>
CC: abrestic@...osinc.com, Paul Walmsley <paul.walmsley@...ive.com>,
  aou@...s.berkeley.edu, linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
  linux-riscv@...ts.infradead.org
Subject:     Re: [PATCH v2 0/2] efi: Fixes for EFI_MEMORY_SP memory on RISC-V and ARM64

On Fri, 02 Feb 2024 10:28:54 PST (-0800), Ard Biesheuvel wrote:
> On Fri, 2 Feb 2024 at 19:07, Andrew Bresticker <abrestic@...osinc.com> wrote:
>>
>> 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
>>
>
> Thanks, I'll take these both as fixes.

Acked-by: Palmer Dabbelt <palmer@...osinc.com>

Thanks!