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powerpc/mm/radix: Use firmware feature to enable Radix MMU

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We use the existing "ibm,pa-features" device-tree property to enable
Radix MMU mode. This means we default to hash mode unless firmware tells
us it's OK to start using Radix mode.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2016-04-29 23:26:32 +10:00 committed by Michael Ellerman
parent ab62476240
commit 17a3dd2f5f
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kernel/prom.c
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@ -166,6 +166,7 @@ static struct ibm_pa_feature {
* which is 0 if the kernel doesn't support TM.
*/
{CPU_FTR_TM_COMP, 0, 0, 22, 0, 0},
{0, MMU_FTR_RADIX, 0, 40, 0, 0},
};
static void __init scan_features(unsigned long node, const unsigned char *ftrs,