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hw/openrisc: Support monitor dumpdtb command

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The openrisc machines don't set MachineState::fdt to point to their
DTB blob.  This means that although the command line '-machine
dumpdtb=file.dtb' option works, the equivalent QMP and HMP monitor
commands do not, but instead produce the error "This machine doesn't
have a FDT".

Set MachineState::fdt in openrisc_load_fdt(), when we write it to
guest memory.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250206151214.2947842-3-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2025-02-06 15:12:10 +00:00
parent cacf4cb251
commit 3c25f487bc
4 changed files with 9 additions and 5 deletions
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7
hw/openrisc/boot.c
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@ -90,8 +90,8 @@ hwaddr openrisc_load_initrd(void *fdt, const char *filename,
return start + size;
}
uint32_t openrisc_load_fdt(void *fdt, hwaddr load_start,
uint64_t mem_size)
uint32_t openrisc_load_fdt(MachineState *ms, void *fdt,
hwaddr load_start, uint64_t mem_size)
{
uint32_t fdt_addr;
int ret;
@ -111,6 +111,9 @@ uint32_t openrisc_load_fdt(void *fdt, hwaddr load_start,
/* copy in the device tree */
qemu_fdt_dumpdtb(fdt, fdtsize);
/* Save FDT for dumpdtb monitor command */
ms->fdt = fdt;
rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr,
&address_space_memory);
qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds,