From: James Morse james.morse@arm.com
Now that kexec_walk_memblock() can do the crash-kernel placement itself architectures that don't support kdump via kexe_file_load() need to explicitly forbid it.
We don't support this on arm64 until the kernel can add the elfcorehdr and usable-memory-range fields to the DT. Without these the crash-kernel overwrites the previous kernel's memory during startup.
Add a check to refuse crash image loading.
Reviewed-by: Bhupesh Sharma bhsharma@redhat.com Signed-off-by: James Morse james.morse@arm.com Signed-off-by: Will Deacon will.deacon@arm.com --- arch/arm64/kernel/kexec_image.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c index 1ad1d5f8f024..07bf740bea91 100644 --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -47,6 +47,10 @@ static void *image_load(struct kimage *image, struct kexec_segment *kernel_segment; int ret;
+ /* We don't support crash kernels yet. */ + if (image->type == KEXEC_TYPE_CRASH) + return ERR_PTR(-EOPNOTSUPP); + /* * We require a kernel with an unambiguous Image header. Per * Documentation/booting.txt, this is the case when image_size