Architectures that require CONFIG_ARCH_KEEP_MEMBLOCK=y, such as arm64,
don't cleanly support add_memory_driver_managed() yet. Most prominently,
kexec_file can still end up placing kexec images on such driver-managed
memory, resulting in undesired behavior, for example, having kexec images
located on memory not part of the firmware-provided memory map.
Teaching kexec to not place images on driver-managed memory is especially
relevant for virtio-mem. Details can be found in commit 7b7b27214bba
("mm/memory_hotplug: introduce add_memory_driver_managed()").
Extend memblock with a new flag and set it from memory hotplug code
when applicable. This is required to fully support virtio-mem on
arm64, making also kexec_file behave like on x86-64.
v1 -> v2:
- "memblock: improve MEMBLOCK_HOTPLUG documentation"
-- Added
- "memblock: add MEMBLOCK_DRIVER_MANAGED to mimic
IORESOURCE_SYSRAM_DRIVER_MANAGED"
-- Improve documentation of MEMBLOCK_DRIVER_MANAGED
- Refine patch descriptions
Cc: Andrew Morton <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Jianyong Wu <[email protected]>
Cc: Aneesh Kumar K.V <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
David Hildenbrand (5):
mm/memory_hotplug: handle memblock_add_node() failures in
add_memory_resource()
memblock: improve MEMBLOCK_HOTPLUG documentation
memblock: allow to specify flags with memblock_add_node()
memblock: add MEMBLOCK_DRIVER_MANAGED to mimic
IORESOURCE_SYSRAM_DRIVER_MANAGED
mm/memory_hotplug: indicate MEMBLOCK_DRIVER_MANAGED with
IORESOURCE_SYSRAM_DRIVER_MANAGED
arch/arc/mm/init.c | 4 ++--
arch/ia64/mm/contig.c | 2 +-
arch/ia64/mm/init.c | 2 +-
arch/m68k/mm/mcfmmu.c | 3 ++-
arch/m68k/mm/motorola.c | 6 ++++--
arch/mips/loongson64/init.c | 4 +++-
arch/mips/sgi-ip27/ip27-memory.c | 3 ++-
arch/s390/kernel/setup.c | 3 ++-
include/linux/memblock.h | 25 +++++++++++++++++++++----
include/linux/mm.h | 2 +-
kernel/kexec_file.c | 5 +++++
mm/memblock.c | 13 +++++++++----
mm/memory_hotplug.c | 11 +++++++++--
13 files changed, 62 insertions(+), 21 deletions(-)
base-commit: 9e1ff307c779ce1f0f810c7ecce3d95bbae40896
--
2.31.1
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