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b2473a3597
__pa() is only intended to be used for linear map addresses and using
it for initial_boot_params which is in fixmap for arm64 will give an
incorrect value. Hence save the physical address when it is known at
boot time when calling early_init_dt_scan for arm64 and use it at kexec
time instead of converting the virtual address using __pa().
Note that arm64 doesn't need the FDT region reserved in the DT as the
kernel explicitly reserves the passed in FDT. Therefore, only a debug
warning is fixed with this change.
Reported-by: Breno Leitao <leitao@debian.org>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Fixes: ac10be5cdb ("arm64: Use common of_kexec_alloc_and_setup_fdt()")
Link: https://lore.kernel.org/r/20241023171426.452688-1-usamaarif642@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
42 lines
732 B
C
42 lines
732 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, __pa(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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