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39508aab4a
Scan the tree for reserved memory before unflattening it. As Rob Herring said: | These should be reversed. early_init_fdt_scan_reserved_mem() works on | the flat tree. Reserved memory needs to be reserved before | unflatten_device_tree() starts allocating memory. Though I imagine that | doesn't really matter for UML. Suggested-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/lkml/YeF%2FVbxo6fAt0WLp@robh.at.kernel.org/ Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Signed-off-by: Richard Weinberger <richard@nod.at>
41 lines
720 B
C
41 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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return;
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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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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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