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spapr: add dumpdtb support

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dumpdtb (-machine dumpdtb=<file>) allows one to inspect the generated
device tree of machine types that generate device trees. This is
useful for a) seeing what's there b) debugging/testing device tree
generator patches. It can be used as follows

$QEMU_CMDLINE -machine dumpdtb=dtb
dtc -I dtb -O dts dtb

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Andrew Jones 2015-09-01 11:25:35 +10:00 committed by David Gibson
parent e39432282e
commit ad440b4ae0
1 changed files with 2 additions and 0 deletions
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hw/ppc/spapr.c
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@ -30,6 +30,7 @@
#include "hw/fw-path-provider.h" #include "hw/fw-path-provider.h"
#include "elf.h" #include "elf.h"
#include "net/net.h" #include "net/net.h"
#include "sysemu/device_tree.h"
#include "sysemu/block-backend.h" #include "sysemu/block-backend.h"
#include "sysemu/cpus.h" #include "sysemu/cpus.h"
#include "sysemu/kvm.h" #include "sysemu/kvm.h"
@ -831,6 +832,7 @@ static void spapr_finalize_fdt(sPAPRMachineState *spapr,
exit(1); exit(1);
} }
qemu_fdt_dumpdtb(fdt, fdt_totalsize(fdt));
cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt)); cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
g_free(bootlist); g_free(bootlist);