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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-05-19 13:24:30 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2016-06-08 14:36:22 +1000
commit3b6d1eb7ea65f4aa64115cf9ba02c190e5c9f6de (patch)
treeea983092d82099c94831e991c45b502e60843028 /arch/powerpc
parent9690c15742688e9cb5ee4aa0b08e458551ceea13 (diff)
powerpc/mm/hash: Compute the segment size correctly for ISA 3.0
PowerISA 3.0 encodes the segment size in the second half of hash page table entry. Update hpte_decode() accordingly. Fixes: 50de596de8be ("powerpc/mm/hash: Add support for Power9 Hash") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/hash_native_64.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
index d873f6507f72..40e05e7f43de 100644
--- a/arch/powerpc/mm/hash_native_64.c
+++ b/arch/powerpc/mm/hash_native_64.c
@@ -550,7 +550,11 @@ static void hpte_decode(struct hash_pte *hpte, unsigned long slot,
}
}
/* This works for all page sizes, and for 256M and 1T segments */
- *ssize = hpte_v >> HPTE_V_SSIZE_SHIFT;
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ *ssize = hpte_r >> HPTE_R_3_0_SSIZE_SHIFT;
+ else
+ *ssize = hpte_v >> HPTE_V_SSIZE_SHIFT;
+
shift = mmu_psize_defs[size].shift;
avpn = (HPTE_V_AVPN_VAL(hpte_v) & ~mmu_psize_defs[size].avpnm);