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Commit 694c4951 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
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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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 7dccfbc3

arch/powerpc/include/asm/book3s/64/radix.h

+9 −4
Original line number Diff line number Diff line
@@ -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

	 */

	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__ */