diff options
| author | Hari Bathini <hbathini@linux.ibm.com> | 2020-07-29 17:10:16 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-29 23:47:53 +1000 |
| commit | b8e55a3e5c208862eacded5aad822184f89f85d9 (patch) | |
| tree | e90ba99f2146c60a94aeb7efff07e7655f88ad70 /arch/powerpc/kexec/elf_64.c | |
| parent | 180adfc532a83c1d74146449f7385f767d4b8059 (diff) | |
powerpc/kexec_file: Avoid stomping memory used by special regions
crashkernel region could have an overlap with special memory regions
like OPAL, RTAS, TCE table & such. These regions are referred to as
excluded memory ranges. Setup these ranges during image probe in order
to avoid them while finding the buffer for different kdump segments.
Override arch_kexec_locate_mem_hole() to locate a memory hole taking
these ranges into account.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159602281047.575379.6636807148335160795.stgit@hbathini
Diffstat (limited to 'arch/powerpc/kexec/elf_64.c')
| -rw-r--r-- | arch/powerpc/kexec/elf_64.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kexec/elf_64.c b/arch/powerpc/kexec/elf_64.c index 23ad04ccaf8e..64c15a5a280b 100644 --- a/arch/powerpc/kexec/elf_64.c +++ b/arch/powerpc/kexec/elf_64.c @@ -46,6 +46,14 @@ static void *elf64_load(struct kimage *image, char *kernel_buf, if (ret) goto out; + if (image->type == KEXEC_TYPE_CRASH) { + /* min & max buffer values for kdump case */ + kbuf.buf_min = pbuf.buf_min = crashk_res.start; + kbuf.buf_max = pbuf.buf_max = + ((crashk_res.end < ppc64_rma_size) ? + crashk_res.end : (ppc64_rma_size - 1)); + } + ret = kexec_elf_load(image, &ehdr, &elf_info, &kbuf, &kernel_load_addr); if (ret) goto out; |