From: Aneesh Kumar K.V Date: Wed, 24 Aug 2016 09:33:37 +0000 (+0530) Subject: powerpc/mm/radix: Use different RTS encoding for different POWER9 revs X-Git-Tag: v4.14-rc1~2273^2~146 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=694c4951922d114e789f669deb409b2aef440ae9;p=platform%2Fkernel%2Flinux-rpi.git powerpc/mm/radix: Use different RTS encoding for different POWER9 revs 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 Acked-by: Michael Neuling Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h index df29422..a2fe8fb 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__ */