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

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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>
This commit is contained in:
Alexander Graf 2014-04-24 12:54:54 +02:00
parent 860540bc50
commit 4e509af9f8
1 changed files with 7 additions and 4 deletions
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11
arch/powerpc/kvm/book3s_64_mmu.c
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@ -275,12 +275,15 @@ static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
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 @@ static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
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;