This is the last piece of my kexec_file_load implementation for arm64.
It is now ready for being merged as some relevant patch to dtc/libfdt[1]
has finally been integrated in v5.3-rc1.
(Nothing changed since kexec_file v16[2] except adding Patch#1 and #2.)
Patch#1 and #2 are preliminary patches for libfdt component.
Patch#3 is to add kdump support.
Bhepesh's patch[3] will be required for 52-bit VA support.
Once this patch is applied, whether or not CONFIG_ARM64_VA_BITS_52 is
enabled or not, a matching fix on user space side, crash utility,
will also be needed.
Anyway, I tested my patch, at least, with the following configuration:
1) CONFIG_ARM64_BITS_48=y
2) CONFIG_ARM64_BITS_52=y, but vabits_actual=48
(I don't have any platform to use for
3) CONFIG_ARM64_BITS_52=y, and vabits_actual=52)
[1] commit 9bb9c6a110ea ("scripts/dtc: Update to upstream version
v1.5.0-23-g87963ee20693"), in particular
7fcf8208b8a9 libfdt: add fdt_append_addrrange()
[2] http://lists.infradead.org/pipermail/linux-arm-kernel/2018-November/612641.html
[3] http://lists.infradead.org/pipermail/linux-arm-kernel/2019-November/693411.html
Changes in v2 (Nov 14, 2019)
* rebased to v5.4-rc7
* no functional changes
AKASHI Takahiro (3):
libfdt: define UINT32_MAX in libfdt_env.h
libfdt: include fdt_addresses.c
arm64: kexec_file: add crash dump support
arch/arm64/include/asm/kexec.h | 4 +
arch/arm64/kernel/kexec_image.c | 4 -
arch/arm64/kernel/machine_kexec_file.c | 106 ++++++++++++++++++++++++-
include/linux/libfdt_env.h | 3 +
lib/Makefile | 2 +-
lib/fdt_addresses.c | 2 +
6 files changed, 112 insertions(+), 9 deletions(-)
create mode 100644 lib/fdt_addresses.c
--
2.21.0
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