From: Zhen Lei
arch_kexec_protect_crashkres() and arch_kexec_unprotect_crashkres()
are meant to be called by kexec_load() in order to protect the memory
allocated for crash dump kernel once the image is loaded.
This is basically revert commit 0d124e96051b
("arm64: kdump : take off the protection
From: Zhen Lei
Unlike in the past, the low memory allocation direction of the crashkernel is
changed from top-down to bottom-up. As long as the DMA zone has sufficient
continuous free memory, the allocated crashkernel low memory must meet the
requirements. The allocation direction of crashkernel
From: Zhen Lei
Use page-level mappings for crashkernel region so that we can use
set_memory_valid() to do access protection for it.
Signed-off-by: Zhen Lei
---
arch/arm64/mm/mmu.c | 21 +
1 file changed, 21 insertions(+)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu
From: Zhen Lei
arm64_memblock_init()
reserve_crashkernel() (1)
paging_init()
map_mem() (2)
unflatten_device_tree or parse ACPI (3)
bootmem_init()
zone_sizes_init()
Update arm64_dma_phys_limit (
