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authorAlexander Graf <agraf@suse.de>2014-04-24 14:54:54 +0400
committerAlexander Graf <agraf@suse.de>2014-05-30 16:26:19 +0400
commit4e509af9f83debe296661d2e09a8a214850efe3c (patch)
tree7876a46c921fce704c1178cc7e2a05ab7d200ae3 /arch/powerpc/kvm/book3s_64_mmu.c
parent860540bc50a174c2dff5e11821375475a5da5f4e (diff)
downloadlinux-4e509af9f83debe296661d2e09a8a214850efe3c.tar.xz
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>
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu.c')
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu.c11
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;