Commit cdc3ee8f authored by Michael Ellerman's avatar Michael Ellerman Committed by Paul Mackerras

[PATCH] powerpc: Refuse to boot a kdump kernel via OF

You can't boot a kdump kernel via OF, not reliably anyway, the kernel being at
32 MB conflicts with the zImage wrapper etc. and it blows up.

It's trivial to check in prom_init though, and this is early enough that we can
actually drop back to OF where a reset-all will get you going again, which is
kinda nice. I think this should go in for 2.6.16.
Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 8c20fafa
...@@ -2098,6 +2098,10 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, ...@@ -2098,6 +2098,10 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*/ */
prom_init_stdout(); prom_init_stdout();
/* Bail if this is a kdump kernel. */
if (PHYSICAL_START > 0)
prom_panic("Error: You can't boot a kdump kernel from OF!\n");
/* /*
* Check for an initrd * Check for an initrd
*/ */
......
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