[RFC PATCH 14/17] powerpc/mm/pseries: Use HASH_PROTECT hcall in guest

[Aneesh Kumar K.V]

Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
 arch/powerpc/platforms/pseries/lpar.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/lpar.c 
b/arch/powerpc/platforms/pseries/lpar.c
index e28e62f6afba..bfab61d17f6d 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -388,15 +388,20 @@ static long pSeries_lpar_hash_updatepp(unsigned long hash,
        unsigned long want_v;
 
        want_v = hpte_encode_avpn(vpn, psize, ssize);
-
        pr_devel("    update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
                 want_v, hash, flags, psize);
 
+       if (firmware_has_feature(FW_FEATURE_HASH_API)) {
+               lpar_rc = plpar_pte_hash_protect(flags, hash, want_v);
+               goto err_out;
+       }
        slot = __pSeries_lpar_hpte_find(hash, want_v);
        if (slot < 0)
                return -1;
 
        lpar_rc = plpar_pte_protect(flags, slot, want_v);
+
+err_out:
        if (lpar_rc == H_NOT_FOUND) {
                pr_devel("not found !\n");
                return -1;
-- 
2.13.3