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221a819aa3
Call this function unconditionally so that we can populate an empty DTB on platforms that don't boot with a command line provided DTB. There's no harm in calling unflatten_device_tree() unconditionally. If there isn't a valid initial_boot_params dtb then unflatten_device_tree() returns early. Cc: Rob Herring <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Richard Weinberger <richard@nod.at> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: linux-um@lists.infradead.org Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240217010557.2381548-4-sboyd@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
42 lines
720 B
C
42 lines
720 B
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/init.h>
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#include <linux/of_fdt.h>
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#include <linux/printk.h>
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#include <linux/memblock.h>
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#include <init.h>
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#include "um_arch.h"
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static char *dtb __initdata;
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void uml_dtb_init(void)
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{
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long long size;
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void *area;
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area = uml_load_file(dtb, &size);
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if (area) {
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if (!early_init_dt_scan(area)) {
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pr_err("invalid DTB %s\n", dtb);
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memblock_free(area, size);
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return;
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}
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early_init_fdt_scan_reserved_mem();
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}
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unflatten_device_tree();
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}
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static int __init uml_dtb_setup(char *line, int *add)
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{
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dtb = line;
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return 0;
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}
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__uml_setup("dtb=", uml_dtb_setup,
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"dtb=<file>\n"
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" Boot the kernel with the devicetree blob from the specified file.\n"
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);
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