POWER9 DD1 uses RTS - 28 for the RTS value but other revisions use
RTS - 31. This makes this distinction for the different revisions
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/book3s/64/radix.h | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h
b/arch/powerpc/include/asm/book3s/64/radix.h
index df294224e280..a2fe8fbfbd3d 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -233,14 +233,19 @@ static inline unsigned long radix__get_tree_size(void)
{
unsigned long rts_field;
/*
- * we support 52 bits, hence 52-31 = 21, 0b10101
+ * We support 52 bits, hence:
+ * DD1 52-28 = 24, 0b11000
+ * Others 52-31 = 21, 0b10101
* RTS encoding details
* bits 0 - 3 of rts -> bits 6 - 8 unsigned long
* bits 4 - 5 of rts -> bits 62 - 63 of unsigned long
*/
- rts_field = (0x5UL << 5); /* 6 - 8 bits */
- rts_field |= (0x2UL << 61);
-
+ if (cpu_has_feature(CPU_FTR_POWER9_DD1))
+ rts_field = (0x3UL << 61);
+ else {
+ rts_field = (0x5UL << 5); /* 6 - 8 bits */
+ rts_field |= (0x2UL << 61);
+ }
return rts_field;
}
#endif /* __ASSEMBLY__ */
--
2.7.4
