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authorOlof Johansson <olof@lixom.net>2007-10-16 00:58:59 +1000
committerPaul Mackerras <paulus@samba.org>2007-10-17 22:30:09 +1000
commitf66bce5e6aa1388289c04496c3fcae7bebf5f905 (patch)
tree7e788739a51947f1caff47f9b5226cad739e3805 /arch/powerpc/mm/hash_utils_64.c
parent8129535b6bcf40be62af2ae6b9234494f39725dd (diff)
[POWERPC] Add 1TB workaround for PA6T
PA6T has a bug where the slbie instruction does not honor the large segment bit. As a result, we have to always use slbia when switching context. We don't have to worry about changing the slbie's during fault processing, since they should never be replacing one VSID with another using the same ESID. I.e. there's no risk for inserting duplicate entries due to a failed slbie of the old entry. So as long as we clear it out on context switch we should be fine. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
-rw-r--r--arch/powerpc/mm/hash_utils_64.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 09da90b5385..c78dc912411 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -212,6 +212,7 @@ static int __init htab_dt_scan_seg_sizes(unsigned long node,
return 1;
}
}
+ cur_cpu_spec->cpu_features &= ~CPU_FTR_NO_SLBIE_B;
return 0;
}