[PATCH 0/2] efi: Fixes for EFI_MEMORY_SP memory on RISC-V and ARM64
Andrew Bresticker
abrestic at rivosinc.com
Fri Feb 2 08:34:31 PST 2024
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 unusable memory (including soft-resreved 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/
Andrew Bresticker (2):
efi: runtime: Fix potential overflow of soft-reserved region size
efi: Don't add memblocks for unusable memory
drivers/firmware/efi/arm-runtime.c | 2 +-
drivers/firmware/efi/efi-init.c | 12 +-----------
drivers/firmware/efi/riscv-runtime.c | 2 +-
3 files changed, 3 insertions(+), 13 deletions(-)
--
2.34.1
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