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of: Support more than one crash kernel regions for kexec -s

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When "crashkernel=X,high" is used, there may be two crash regions:
high=crashk_res and low=crashk_low_res. But now the syscall
kexec_file_load() only add crashk_res into "linux,usable-memory-range",
this may cause the second kernel to have no available dma memory.

Fix it like kexec-tools does for option -c, add both 'high' and 'low'
regions into the dtb.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Baoquan He <bhe@redhat.com>
Link: https://lore.kernel.org/r/20220506114402.365-6-thunder.leizhen@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Zhen Lei 2022-05-06 19:44:01 +08:00 committed by Catalin Marinas
parent fb319e77a0
commit 8af6b91f58
1 changed files with 9 additions and 0 deletions
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9
drivers/of/kexec.c
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@ -386,6 +386,15 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
crashk_res.end - crashk_res.start + 1);
if (ret)
goto out;
if (crashk_low_res.end) {
ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
"linux,usable-memory-range",
crashk_low_res.start,
crashk_low_res.end - crashk_low_res.start + 1);
if (ret)
goto out;
}
}
/* add bootargs */