powerpc/mm/hash: Use the correct PPP mask when updating HPTE
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Wed, 8 Jun 2016 14:25:55 +0000 (19:55 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 14 Jun 2016 03:54:51 +0000 (13:54 +1000)
commit8550e2fa34f077c8a87cf1ba2453102bbbc9ade9
treece444d73a73f96b8d1332b25b12af770e3ada2f5
parenta145abf12c9f7d30d8c330c9d8a97428cbf0589b
powerpc/mm/hash: Use the correct PPP mask when updating HPTE

With commit e58e87adc8bf9 "powerpc/mm: Update _PAGE_KERNEL_RO" we now
use all the three PPP bits. The top bit is now used to have a PPP value
of 0b110 which will be mapped to kernel read only. When updating the
hpte entry use right mask such that we update the 63rd bit (top 'P' bit)
too.

Prior to e58e87adc8bf we didn't support KERNEL_RO at all (it was ==
KERNEL_RW), so this isn't a regression as such.

Fixes: e58e87adc8bf ("powerpc/mm: Update _PAGE_KERNEL_RO")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/include/asm/book3s/64/mmu-hash.h
arch/powerpc/mm/hash_native_64.c