KVM: PPC: Book3S_64 PR: Access HTAB in big endian

The HTAB is always big endian. We access the guest's HTAB using
copy_from/to_user, but don't yet take care of the fact that we might
be running on an LE host.

Wrap all accesses to the guest HTAB with big endian accessors.

Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c
index 171e5caf2b88..b93c2456253d 100644
--- a/arch/powerpc/kvm/book3s_64_mmu.c
+++ b/arch/powerpc/kvm/book3s_64_mmu.c
@@ -275,12 +275,15 @@ do_second:
                 key = 4;
 
         for (i=0; i<16; i+=2) {
+                u64 pte0 = be64_to_cpu(pteg[i]);
+                u64 pte1 = be64_to_cpu(pteg[i + 1]);
+
                 /* Check all relevant fields of 1st dword */
-                if ((pteg[i] & v_mask) == v_val) {
+                if ((pte0 & v_mask) == v_val) {
                         /* If large page bit is set, check pgsize encoding */
                         if (slbe->large &&
                             (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
-                                pgsize = decode_pagesize(slbe, pteg[i+1]);
+                                pgsize = decode_pagesize(slbe, pte1);
                                 if (pgsize < 0)
                                         continue;
                         }
@@ -297,8 +300,8 @@ do_second:
                 goto do_second;
         }
 
-        v = pteg[i];
-        r = pteg[i+1];
+        v = be64_to_cpu(pteg[i]);
+        r = be64_to_cpu(pteg[i+1]);
         pp = (r & HPTE_R_PP) | key;
         if (r & HPTE_R_PP0)
                 pp |= 8;