powerpc/64s: Default l1d_size to 64K in RFI fallback flush
If there is no d-cache-size property in the device tree, l1d_size could be zero. We don't actually expect that to happen, it's only been seen on mambo (simulator) in some configurations. A zero-size l1d_size leads to the loop in the asm wrapping around to 2^64-1, and then walking off the end of the fallback area and eventually causing a page fault which is fatal. Just default to 64K which is correct on some CPUs, and sane enough to not cause a crash on others. Fixes: aa8a5e00 ('powerpc/64s: Add support for RFI flush of L1-D cache') Signed-off-by:Madhavan Srinivasan <maddy@linux.vnet.ibm.com> [mpe: Rewrite comment and change log] Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
parent
b8858581
Please register or sign in to comment